Specifications

ManualsBrandsCanon ManualsBusiness equipmentNP7130F

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

REVISION 0

FY8-13GB-000

AUG. 1999

Summary of content (426 pages)

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IMPORTANT THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCE OF REFERENCE FOR WORK IN THE FIELD. SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER PRINTED MATTER. ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.
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INTRODUCTION This service manual has been prepared for NP6512, NP6612, NP7120, NP7130, and NP7130F, providing basic information used for servicing the machines in the field so as to ensure their quality and performance. This service manual consists of the following chapters: Chapter 1 General Description introduces the machine's features, specifications, names of parts, and how originals are reproduced. Chapter 2 Basic Operation explains how copies are made on a step-by-step basis.
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The following rules apply throughout this Service Manual: 1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with reference to the timing of operation. represents the path of mechanical drive—where a signal name In the diagrams, accompanies the symbol , the arrow indicates the direction of the electric signal.
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• This service manual covers the models shown in the following table. Be sure to have a good understanding of the difference from model to model before referring to this manual. Model Type code Default ratio NP6512 NP6612 NP7120 NP7120 NP7130 NP7130 NP7130F TWA TXA PUB PUC NVF PTZ NVH 2R2E 2R2E 2R2E 2R2E 3R1E 2R2E 3R1E ADF as standard √ √ Cassette 250 sheets 250 sheets Universal Universal 500 sheets 500 sheets 500 sheets The notation “√” indicates that the item in question is available.
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CONTENTS CHAPTER 1 GENERAL DESCRIPTION I. II. FEATURES ..................................1-1 SPECIFICATIONS .......................1-2 A. Copier ....................................1-2 B. ADF .......................................1-6 III. NAMES OF PARTS .....................1-8 A. External View ........................1-8 B. Cross Section ..................... 1-11 IV. USING THE MACHINE ............. 1-13 A. Control Panel...................... 1-13 B. User mode .......................... 1-15 V.
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CHAPTER 4 IMAGE FORMATION SYSTEM I. IMAGE FORMATION SYSTEM ...4-1 A. Outline ...................................4-1 B. Timing Chart for the Image Formation System .................4-3 C. Primary Charging Roller Bias Control ...................................4-4 D. Controlling the Transfer Roller Bias .......................................4-9 E. Controlling the Developing/ Separation Static Eliminator Bias .................................... 4-12 F. Measuring the Density of Originals ....................
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS I. II. FANS ............................................7-1 POWER SUPPLY SYSTEM .........7-3 A. Outline of the Power Supply System ..................................7-3 B. Power Supply Circuit .............7-4 C. Detecting an Error on the Composite Power Supply PCB .....7-6 D. Protecting the Power Supply Circuit ....................................7-6 III. DISASSEMBLY/ASSEMBLY ........7-7 A. External Covers .....................7-8 B. Control Panel.................
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CHAPTER 11 TROUBLESHOOTING I. MAINTENANCE AND INSPECTION ............................ 11-3 A. Image Adjustment Basic Procedure ........................... 11-3 B. Points to Note for Servicing ............................ 11-4 II. STANDARDS AND ADJUSTMENTS ....................... 11-5 A. Mechanical ......................... 11-5 B. ADF .................................. 11-30 C. Electrical ........................... 11-41 III. TROUBLESHOOTING IMAGE FAULTS ................................... 11-52 A.
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CHAPTER 1 GENERAL DESCRIPTION This chapter provides specifications of the machine, instructions on how to operate the machine, and an outline of copying process. I. II. FEATURES ..................................1-1 SPECIFICATIONS .......................1-2 A. Copier ....................................1-2 B. ADF .......................................1-6 III. NAMES OF PARTS .....................1-8 A. External View ........................1-8 B. Cross Section .....................
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CHAPTER 1 GENERAL DESCRIPTION I. FEATURES 1. Personal Copier with a Zoom Function and a Fixed Copyboard • You can choose either a default enlargement/reduction ratio or any ratio between 70% and 141% in 1% increments. 2. Ecology-Conscious • The use of a roller charging method has resulted in a considerable reduction of ozone: 0.01 ppm or less on the average, 0.02 ppm or less at maximum (1/100 to 1/1000 compared with existing Canon machines). 3.
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CHAPTER 1 GENERAL DESCRIPTION II. SPECIFICATIONS A. 1. Copier Type Item Descriptions Body Desk top Copyboard Fixed Source of light Halogen lamp (80 V/110 W for 120V-model; 150 V/160 W for 220/240 V-model) Lens Fixed focal point lens Photosensitive medium OPC drum (24-mm dia.) Table 1-201 2.
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CHAPTER 1 GENERAL DESCRIPTION 3. Performance Original type Descriptions Sheet, book, 3-D object (2kg max.) Maximum original size A4 (297 × 210 mm)/LGL (216 × 356 mm) Reproduction ratio Inch/AB-configuration: 2R2E Inch-configuration: 3R1E Zoom 70% to 141% (in 1% increments) Wait time 0 sec (at 20°C room temperature) First copy time 10 sec or less (at 20°C room temperature; Direct, non-AE, from the cassette) Continuous copying 100 (max.) Copy size A4/LGL (297 × 210 mm/216 × 356 mm max.
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CHAPTER 1 GENERAL DESCRIPTION 4. Others Descriptions Item Operating condition Temperature Humidity Atmospheric pressure 7.5°C to 32.5°C/45.5°F to 90.5°F 5% to 85% RH 607.95 to 1013.25 hPa (0.6 to 1 atm) Power source 120 V 60 Hz 220/240 V 50 Hz Serial number NVFxxxxx NVHxxxxx Maximum power consumption 0.9 kW or less Standby: 1.2 W (approx.; about 5 min; reference only) Copying: 0.4 kWh (approx.
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CHAPTER 1 GENERAL DESCRIPTION 5. Default Ratios Item Direct 2R2E (Inch/AB-configuration) 1:1.000 3R1E (Inch-configuration) 1:1.000 1:0.707 1:0.707 Reduce I 1:0.786 Reduce II 1:0816 Reduce III 1:0.860 Reduce IV Enlarge I 1:1.154 Enlarge II 1:1.414 1:1.414 Table 1-205 6. Copying Speed Copying speed at Direct Reproduction ratio Copy size 13 Direct 12 Reduce I (70.7%) Reduce II (78.6%) Reduce IV (86.0%) Enlarge II (141.
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CHAPTER 1 GENERAL DESCRIPTION B. ADF Descriptions Item Original pickup Auto pickup/delivery Original orientation Face-down Original position Center reference Original separation Top separation Original type Single-sided (50 to 128 g/m2) A5 (STMT) to A4R (LTRR), LGL Length: 139.7 to 355.6 mm (feeding direction) Width: 139.7 to 215.
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CHAPTER 1 GENERAL DESCRIPTION *1. The following may not be used as an original: • Sheet with a staple, clip, or glue. • Sheet with a cut, hole, or tear. • Sheet with holes for binding. • Sheet with a carbon back. • Sheet with a cut-and-paste piece. • Sheet with curling, bending, or wrinkling. The specifications are subject to change for product improvement. COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION III. NAMES OF PARTS A. 1. External View [1] Copyboard Type [2] [6] [3] [4] [5] [1] Copyboard cover [2] Static eliminator cleaner [3] Manual feed tray [4] Right door [5] Cassette [6] Copyboard glass Figure 1-301 [4] [3] [5] [2] [1] [6] [1] Copy tray [2] Power cord connector [3] Open/close lever [4] Copy density correction dial [5] Static eliminator [6] Delivery guide plate Figure 1-302 1-8 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION 2. ADF Type [1] [5] [2] [3] [4] [4] Cassette [5] Copyboard glass [1] ADF [2] Manual feed tray [3] Right door Figure 1-303 [6] [5] [7] [4] [3] [2] [1] [1] [2] [3] [4] Static eliminator cleaner Delivery guide plate Copy tray Power cord connector [5] Open/close lever [6] Copy density correction dial [7] Static eliminator Figure 1-304 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION 3. ADF [3] [4] [2] [1] [1] Original tray [2] Original delivery tray [3] Slide guide [4] Auxiliary tray Figure 1-305 1-10 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION B. 1. Cross Section Body [1] [2] [32] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [3] [4] [5] [31] [30] [29] No. 3 mirror No. 2 mirror No. 1 mirror Scanning lamp Heat exhaust fan Copyboard glass Drum Unit Pre-exposure lamp Side blanking lamp Lens No. 6 mirror [6] [28] [7] [8] [9] [10] [27] [11] [12] [13] [14] [26] [25][24] [23] [22] [21] [20] [19] [18] [17] [12] Primary charging roller cleaning pad [13] No. 4 mirror [14] No.
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CHAPTER 1 GENERAL DESCRIPTION 2. ADF [1] [2] [13] [1] [2] [3] [4] [5] [6] [7] [3] [12] Delivery roller Copy tray Pickup roller 2 Pickup roller 1 Copyboard tray Auxiliary tray Guide plate [11] [10] [9] [8] [9] [10] [11] [12] [13] [4] [5] [6] [8] [7] Separation pad Registration roller Feed belt drive roller Feed belt Feed belt roller Feed belt link slave roller Figure 1-307 1-12 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION IV. USING THE MACHINE A. Control Panel [1] [2] [17] [3] [16] [4] [5] [6] [7] [8] [15] [14] [13][12] [11] [9] [10] Figure 1-401 No. 1 Name Copy density adjusting lever Description Adjusts the density of copies manually. 2 Copy density mode indicator Indicates the selected copy density mode. 3 Default ratio indicator Indicates the selected default ratio. 4 Paper selection indicator Indicates the selected cassette/ manual feed tray.
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CHAPTER 1 GENERAL DESCRIPTION No. 9 Name Copy start key Description Starts copying. 10 Power switch Turns on and off the power. 11 Count/zoom set key Sets the number of copies or a zoom ratio. 12 Zoom indicator Turns on when zoom mode is selected. 13 Zoom key Selects/deselects zoom mode. 14 Jam indicator Flashes in response to a jam. 15 Paper selection key Selects the cassette/ manual feed tray. 16 Default ratio key Selects a default reproduction ratio.
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CHAPTER 1 GENERAL DESCRIPTION B. User mode Indication U1 Function Primary charging roller cleaning Description Use it to clean the primary charging roller. (See p. 4-31.) U5* DF recovery mode on/off Use it to enable/disable recovery mode with the DF in use: 00: disable. 01: enable. U6* Feeder cleaning Use it to clean the feeder. (See p. 1-16.) U7 Installation/drum replacement mode Use it at time of installation or replacement of the drum unit. (See p. 9-14.
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CHAPTER 1 GENERAL DESCRIPTION V. ROUTINE MAINTENANCE BY THE USER Instruct the user to clean the following if images tend to be soiled or copy paper tends to jam often. 1. Soiled Images a. Copyboard Glass/Copyboard Cover Clean the cover with a moist cloth (with water or mild detergent solution); then, dry wipe it. b. Feeding Belt (ADF type) b.1 Cleaning in Feeder Cleaning Mode 1) Turn on the machine, and hold down the Copy Density Mode Selection key for 4 sec or more.
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CHAPTER 1 GENERAL DESCRIPTION b.2 Cleaning by Hand 1) Wipe the feed belt with a moist cloth (water or mild detergent solution) in the direction of the arrow in the figure; then, dry wipe it. Figure 1-502 2. If Jams Occur Frequently a. Static Eliminator 1) Remove the static eliminator cleaner from the machine. Figure 1-503 (Copyboard type) COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION Figure 1-504 (ADF type) 2) Pull the open/close lever to open the machine. 3) Using the static eliminator cleaner, clean the static eliminator. • Brush out the paper lint or the like from the groove of the static eliminator. Figure 1-505 4) Close the machine as soon as you have finished cleaning. (Work briskly.) 1-18 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION VI. IMAGE FORMATION A. Outline The construction of the machine is as follows: Copyboard glass Scanning lamp Fixed focal point lens Side blanking lamp (front, rear) Primary charging roller Pre-exposure lamp Developing blade Photosensitive drum Fixing assembly Developing cylinder Cleaning blade Transfer charging roller Static eliminator Figure 1-601 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 1 GENERAL DESCRIPTION The machine’s image formation process consists of the following seven steps: Step 1 Pre-exposure Step 2 Primary charging (negative DC) Step 3 Image exposure Step 4 Development (AC + negative DC) Step 5 Transfer (negative DC) Step 6 Separation (curvature separation + static eliminator; positive DC) Step 7 Fixing Step 8 Drum cleaning Static latent image formation block 2. Primary charging 3. Image exposure 1. Pre-exposure 8. Drum cleaning 4. Development Manual feed 5.
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CHAPTER 2 BASIC OPERATION This chapter provides descriptions on basic operations, functions of each operation, relationships between electrical and mechanical systems, and timing at which each associated part is turned on. Process speed I. BASIC OPERATIONS ..................2-1 A. Functional Construction ........2-1 B. Outline of Electrical Circuitry .................................2-2 C. Basic Sequence of Operations .............................2-3 COPYRIGHT © 1999 CANON INC. 96 mm/sec D.
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CHAPTER 2 BASIC OPERATION I. BASIC OPERATIONS A. Functional Construction The machine consists of four functional blocks: pickup/feeding system, exposure system, image formation system, and control system.
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CHAPTER 2 BASIC OPERATION B. Outline of Electrical Circuitry The machine's major electric mechanisms are controlled by the microprocessor mounted on the DC controller PCB, which reads input signals from sensors and operating keys according to the instructions of the program stored in advance and sends signals used to drive motors, solenoids, lamps, and other loads as needed.
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CHAPTER 2 BASIC OPERATION C. Basic Sequence of Operations • A4R, Direct, 2 Copies, Continuous, Cassette Power switch ON Copy Start key ON STBY INTR AER Main motor (M1) Scanner lamp (LA1) Scanner Pre-exposure lamp Primary bias Developing AC bias Developing DC bias Transfer bias Static eliminator bias SCFW SCRV SCFW SCRV LSTR STBY 0.3sec (approx.
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CHAPTER 2 BASIC OPERATION Period • From when he power switch is turned on to when the Copy Start key is pressed. • From when LSTR ends to when the Copy Start key is pressed. Description Waits until the Copy Start key is pressed. INTR (initial rotation) From when the Copy Start key is pressed to when the scanner moves forward. Removes residual charges from the photosensitive drum, thereby ensuring a stable drum sensitivity.
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CHAPTER 2 BASIC OPERATION D. Controlling the Main Motor (M1) 1. Outline Table 2-102 shows the functions of the main motor control circuit, and Figure 2-104 is a block diagram of the circuit. Item Power supply Description 24 VDC from the composite power supply. Drive signal Signal (MMD) from the DC controller PCB.
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CHAPTER 2 BASIC OPERATION 2. Operations The main motor (M1) is a DC motor with a built-in clock pulse generator, which generates clock pulses (MMCLK) in relation to the rotation of the motor while the motor is rotating. The speed control circuit controls the main motor (M1) so that it rotates at a specific speed by matching the frequency of these clock pulses and that of the reference signals.
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CHAPTER 2 BASIC OPERATION E. 1. Inputs to and Outputs from the DC Controller Inputs to the DC Control (1/2) DC controller PCB Scanner home position sensor +5V J101-1 -3 SCHP -2 PS1 Lens home position sensor PS2 +5V J109-11 -10 LHP -9 PS3 J62 J102-7 DIG3 -9 DPD -8 When PS3 has detected paper, ‘0’. (The light-blocking plate is at PS3, ‘1’.) PS4 +5V J132-3 -5 PDP -4 When PS4 has detected paper, ‘1’. (The light-blocking plate is at PS4, ‘1’.
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CHAPTER 2 BASIC OPERATION 2. Inputs to the DC Controller (2/2) DC controller PCB J601 +24V AE sensor PCB +24V J107-4 -3 AE -2 AEREF -1 The keys and the LEDs are wired in a matrix in the control panel PCB, and the DC controller turns on or flashes the LEDs and reads key inputs. J301 J111 Control panel PCB J111-15 When the light reflected by the original increases, the voltage increases.
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CHAPTER 2 BASIC OPERATION 3. Outputs from the DC Controller (1/2) Composite power supply PCB Line filter J201-2 LF1 (220/240V model only) NF1 DS1 -1 Noise filter Door switch Fixing heater J16 J434 H1 FU2 Transformer J207-1 -2 Fixing heater activation circuit Thermal fuse 2 Scanning lamp FU1 DC controller PCB LA1 J104-2 HEAT_TRG When ‘0’, the fixing heater turns on.
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CHAPTER 2 BASIC OPERATION 4. Outputs from the DC Control PCB (2/2) DC controller PCB J53 J51 Pickup clutch solenoid SL1 -3 SL2 -5 SL3 SL4 Cassette pickup solenoid SL5 When ‘0’, the registration clutch solenoid turns on. +24V LNSLD* When ‘0’, the lens solenoid turns on. +24V J109-8 -7 J58 RGSLD* J109-2 -1 J55 J51 Multifeeder pickup solenoid When ‘0’, the pickup clutch solenoid turns on.
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CHAPTER 2 BASIC OPERATION 5. Inputs to and Outputs from the ADF DC controller PCB J60 To the ADF J24 To the ADF -8 J114-1 -7 -2 -6 -3 -5 -4 -4 -5 -3 -6 -2 -7 -1 -8 REQ ACK TXD See Chapter 8. RXD -4 -3 -2 -1 J202-1 J105-6 +24V -2 -5 +5V -3 -4 +5V -4 -3 -5 -2 -6 -1 +24V Composite power supply PCB Figure 2-109 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM This chapter discusses the principles of operation used for the machine's lens drive unit and scanner drive unit. It also explains the timing at which these drive units are operated, and shows how they may be disassembled/assmbled and adjusted. I. II. OPERATIONS ..............................3-1 A. Outline ...................................3-1 B. Varying the Reproduction Ratio ......................................3-2 C. Lens Drive System ................3-3 D.
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CHAPTER 3 EXPOSURE SYSTEM I. OPERATIONS A. Outline Table 3-101 shows the major functions of the exposure system. Item Description Lamp Halogen Scanning By moving the No. 1 mirror mount Scanner position detection By a sensor (scanner home position sensor; PS1) Ratio variation Main scanning direction:by varying the optical length Sub scanning direction:by varying the speed of the No. 1 mirror mount Lens drive control Scanner/lens drive motor (M2) Fixed focal point lens unit Mobile No.
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CHAPTER 3 EXPOSURE SYSTEM B. Varying the Reproduction Ratio The reproduction ratio in the drum axial direction (main scanning direction) is varied by the lens drive system, and that in the drum peripheral direction (sub scanning direction) is changed by the scanner drive system. In the lens drive system, the positions of the fixed focal point lens and the No. 4/5 mirror are changed to vary the reproduction ratio. In the scanner system, the relative speed of the No.
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CHAPTER 3 EXPOSURE SYSTEM C. Lens Drive System 1. Outline The lens drive system is driven by the scanner/lens drive motor (M2). When the lens solenoid (SL3) turns on, the switching gear is pushed in the direction of . In this condition, when the scanner/lens drive motor rotates in reverse direction ( ), the lens unit will move in the direction of reduction ( ) by the work of the gear and the lens cable. At the same time, the No.
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CHAPTER 3 EXPOSURE SYSTEM D. Scanner Drive System 1. Outline The scanner is driven by the scanner/lens drive motor (M2), whose direction of rotation changes to move the scanner forward or in reverse.
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CHAPTER 3 EXPOSURE SYSTEM 2. Relationship between Scanner Sensor and Signal Scanner sensor PS1(scanner home position sensor) Scanner Forward Reverse Signal Description • Provides a means of reference for determining forward movement distance. • Stops the scanner moving in reverse in 0.1 sec. SCHP Table 3-102 3.
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CHAPTER 3 EXPOSURE SYSTEM 4. Controlling the Copying Speed The machine uses a halogen lamp for scanning, and the heat of the lamp increases the temperature of the copyboard. To prevent possible overheating of the copyboard glass, the temperature of the scanner is monitored by a thermistor (TH2); if its reading reaches 37.5°C or higher, the copying speed is reduced to 6 cpm. If this mechanism turns on during continuous copying, it remains on until the end of the copying job.
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CHAPTER 3 EXPOSURE SYSTEM 5. a. Controlling the Scanner/Lens Drive Motor Outline The scanner/lens drive motor (M2) is a 4-phase stepping motor. The timing at which the drive power (SC-COM) and pulses (SC-A, SCA*, SC-B, SC-B*) are generated is controlled to turn on/ off the scanner/lens drive motor (M2) or to switch the direction of its rotation.
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CHAPTER 3 EXPOSURE SYSTEM b. Operations The microprocessor (Q101) mounted on the DC controller PCB receives instructions from the control panel PCB copying mode settings (e.g., reproduction ratio). In response, it applies drive pulses to the scanner/lens drive motor (M2) through the motor driver circuit. The scanner motor is a 4-phase stepping motor, and changes the direction and speed of its rotation according to the sequence and frequency of drive pulses (SC-A*through SC-B*).
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CHAPTER 3 EXPOSURE SYSTEM II. EXPOSURE SYSTEM A. Controlling the Scanning Lamp 1. Outline Figure 3-201 shows the circuit used to control the scanning lamp, and has the following functions: • Turning on/off the scanning lamp. • Controlling the intensity of the scanning lamp. • Monitoring the state (on/off) of the scanning lamp.
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CHAPTER 3 EXPOSURE SYSTEM 2. a. Operations Turning On/Off the Scanning Lamp The DC controller PCB and the composite power supply exchange signals in serial communication to control the scanning lamp. According to the scanner lamp active voltage signal, the microprocessor (Q900) on the composite power supply PCB controls the intensity adjustment signal (PWM_1KHz) and the lamp activation signal (LAMP_ON) to turn on/off the scanning lamp (LA1). When LAMP_ON is ‘0’, The phase control circuit turns on.
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CHAPTER 3 EXPOSURE SYSTEM b. Controlling the Intensity of the Scanning Lamp The intensity of the lamp is controlled by the scanning lamp active voltage signal sent by the DC controller PCB in serial. The microprocessor (Q900) on the composite power supply PCB sends the intensity adjustment signal (PWM_1KHz) in response to the scanning lamp active voltage signal. In turn, the phase control circuit (HIC001) controls the voltage supplied to the scanning lamp.
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CHAPTER 3 EXPOSURE SYSTEM c. Monitoring the Activation of the Scanning Lamp The activation detection signal (LAMP_DETECT) is sent to the microprocessor (Q900) on the composite power supply PCB as long as the scanning lamp remains on. The composite power supply PCB sends the lamp activation signal to the DC controller PCB in serial by way of monitoring the activation of the scanning lamp (LA1).
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CHAPTER 3 EXPOSURE SYSTEM III. DISASSEMBLY/ASSEMBLY As needed, disassemble/assemble the machine with the following in mind: 1. ! Before starting the work, turn off the power switch and disconnect the power plug for safety. 2. Unless otherwise instructed, assemble the parts by reversing the steps used to disassemble it. 3. Identify the screws by type (length, diameter) and location. 4. Use the washers where necessary.
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CHAPTER 3 EXPOSURE SYSTEM A. Scanner Drive Assembly 1. Removing the Scanner/Lens Drive Motor Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.”) Remove the developing assembly. (See Chapter 4.II.D.2. “Removing the Developing assembly.”) Remove the copyboard glass. (See Chapter 7.III.C.1. “Removing the Copyboard Glass.”) Remove the four screws [1], and detach the lens cover [2].
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CHAPTER 3 EXPOSURE SYSTEM 6) Open the machine’s top unit farther, and hold it in position using the handle (about 30 mm in diameter) of a screwdriver. Figure 3-303 7) Remove the two fixing screws [4] from the scanner/lens drive motor [5]. [5] [4] Figure 3-304 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 8) Free the top unit (by removing the screwdriver), and close the top unit. 9) Remove the E-ring [6]; then, lift the cable drive pulley [7] slightly, and detach the scanner/lens drive motor [5]. [6] Lift. [5] [7] Figure 3-305 3-16 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 2. Outline of the Scanner Drive Cable Wind 1.5 times. (black cable) Wind 7.5 times. (silver-colored cable) Figure 3-306 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 3. a. Routing the Scanner Drive Cable Before Starting the Work Prepare the following: • Mirror positioning tool • Cable clip • Adhesive tape 1) Set the mirror positioning tool as shown. Figure 3-307 2) Prepare about five strips of adhesive tape (each one about 20 × 50 mm). 3) Remove the copyboard glass. (See Chapter 7.III.C.1. “Removing the Copyboard Glass.”) 4) Disconnect the connectors (J101, J131) [1] from the DC controller PCB.
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CHAPTER 3 EXPOSURE SYSTEM 5) If the machine is equipped with an ADF, free the hook [2], and disconnect the two relay connectors [3] from the left upper stay [4]. [4] [2] [3] [2] [3] [2] [2] Figure 3-309 6) Remove the three screws [5], and detach the left upper stay [4]. [5] [5] [4] Figure 3-310 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM b. Routing the Reversing Cable 1) Wind the reversing cables (silver-colored) [2] on the cable drive pulley [1] 7.5 times with the longer end on top; then, secure it in position with a cable clip [3]. [1] Longer end Shorter end [2] Face with a marking Figure 3-312 [3] [1] [3] Top View Figure 3-313 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 2) Put the cable drive pulley [1] into the shaft [4], and secure it in position with an Ering [5]. When putting the cable drive pulley into the shaft, be sure that the hook is at the front. [5] Hook [1] (front) [4] Figure 3-314 3) Hook the shorter end [6] on the pulley [7]. [7] [6] Figure 3-315 3-22 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 4) Lead the shorter end [6] under the No. 1 mirror mount [8] and the No. 2/3 mirror mount [9]; then, hook it on the left rear pulley [10] and the pulley [11] of the No. 2/3 mirror mount. [11] [9] [8] [10] [6] Figure 3-316 5) After fitting the shorter end [6] on the cable hook [12], secure its end with adhesive tape [13]. Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches.
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CHAPTER 3 EXPOSURE SYSTEM 7) Lead the longer end [14] under the No. 1 mirror mount [8] and the No. 2/3 mirror mount [9]; then, hook it on the pulley [16] on the left front side and the pulley [17] of the No. 2/3 mirror mount. [17] [8] [16] [14] [9] Figure 3-319 8) Hook the longer end [14] on the cable hook [18]; then, secure its end to the left side with adhesive tape [19]. Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches.
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CHAPTER 3 EXPOSURE SYSTEM c. Routing the Forwarding Cable 1) Fit the longer end forwarding cable (black) [2] on the top hook of the cable drive pulley [1], and wind it 1.5 times. Then, secure the shorter end [3] as shown with adhesive tape [4]. [4] Face without a marking [3] [2] [1] Figure 3-321 2) Lead the longer end [5] along the cable drive pulley [1] as shown, and hook it on the pulley [6] on the right front side. [1] [5] [6] Figure 3-322 [8] 3) Lead the longer end [5] under the No.
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CHAPTER 3 EXPOSURE SYSTEM 4) Hook the end of the longer end [5] on the hole [10] on the right side. [10] [5] Figure 3-324 5) Free the shorter end [3], and hook it on the pulley [11] on the right rear side. [3] [11] Figure 3-325 6) Lead the shorter end [3] under the No. 1 mirror mount [7], and hook it on the pulley [12] of the No. 2/3 mirror mount as shown; then, lead it between the No. 1 mirror mount [7] and the scanning lamp [9]. [12] [3] [9] [7] Figure 3-326 3-26 COPYRIGHT © 1999 CANON INC.
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CHAPTER 3 EXPOSURE SYSTEM 7) Hook the end of the shorter end [3] on the hole [13] on the right side. [3] [13] Figure 3-327 8) Free the shorter end [3] and the longer end [5] (reversing cable), and connect both with a spring [14]; then, fit the stopper [15]. [14] [3] [15] [5] Figure 3-328 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM d. Positioning the No. 1 Mirror Mount 1) Fix the rear and the front of the No. 1 mirror mount [1] temporarily to the metal fixing [2] of the forwarding cable. [1] [2] Figure 3-330 (front) [2] [1] Figure 3-331 (rear) COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 2) Turn the cable drive pulley [4] so that the three shafts [3] of the mirror positioning tool for rear and front is as shown. [3] [4] [3] Figure 3-332 (rear) [3] [3] Figure 3-333 (front) 3-30 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 3) While keeping the condition of step 2), tighten the positioning screw on the rear and front of the No. 1 mirror mount [1]. [1] Figure 3-334 (rear) [1] Figure 3-335 (front) COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM B. Lens Drive Assembly 1. Removing the Lens Cable 1) Turn on the power; when the lens has moved to the Direct position, disconnect the power plug. 2) Remove the copyboard glass. (See Chapter 7.III.C.1. “Removing the Copyboard Glass.”) 3) Remove the main drive assembly. (See Chapter 7.III.D.2. “Removing the Main Drive Assembly.”) 4) Remove the four screws [1], and detach the lens cover [2]. [1] [1] [2] Figure 3-336 3-32 COPYRIGHT © 1999 CANON INC.
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CHAPTER 3 EXPOSURE SYSTEM 5) Mark the position of the lens cable fixing plate [3] and the lens mount [4] with a scriber. [3] Marking Caution: When routing the lens cable, be sure to refer to the marking made with a scriber. [4] Figure 3-337 6) Disengage the lever [5] of the No. 4/5 mirror mount and the gear [6]. [6] [5] Figure 3-338 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 7) Remove the screw [7], and detach the cam gear [6] and the cable retainer [8]. [7] [6] [8] Figure 3-339 8) Holding the middle of the No. 1 mirror mount [9], move it to the center of the machine. [9] Caution: Do not hold the reflecting plate. Figure 3-340 9) Remove the spring [10]. [10] Figure 3-341 3-34 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 10) Remove the screw [11], and detach the lens cable fixing plate [12]. [11] [12] Figure 3-342 11) Free the lens cable [13] from the lens cable fixing plate [12]; then, detach the lens cable from the machine. [13] [12] Figure 3-343 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 2. Routing the Lens Cable 1) After routing the lens cable, keep the lever [1] of the No. 4/5 mirror mount disengaged from the cam gear [2] (so that the lever will not come into contact when the cam gear rotates). [2] [1] Figure 3-344 2) While keeping the condition in step 1), turn on the power; when the No. 1 mirror mount and the lens stopped moving, turn off the power. • The lens will move to the Direct position. 3) Check to make sure that the tip of the lever [1] of the No.
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CHAPTER 3 EXPOSURE SYSTEM 4) If the tip of the lever [1] and the marking on the cam gear [2] do not match, remove the fixing screw [4] of the cam gear [2] and detach the cam gear; then, mount the cam gear once again so that the marking on it and the tip of the lever match. [4] [2] [1] Figure 3-346 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM C. Exposure System 1. Removing the Scanning Lamp 1) Disconnect the power plug. 2) Remove the copyboard glass. (See Chapter 7.III.C.1. “Removing the Copyboard Glass.”) 3) Holding the middle of the No. 1 mirror mount [1], move the No. 1 mirror mount [1] to the right by about 5 cm. [1] Caution: Do not hold the reflecting plate. Figure 3-347 4) Free the harness [3] from the guide [2]; then, remove the screw [4], and detach the reflecting plate [5].
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CHAPTER 3 EXPOSURE SYSTEM 5) While pushing the electrode mount [6] found at the rear of the machine in the direction of the arrow, detach the scanning lamp [7]. Caution: 1. Do not start the work if the scanning lamp is hot. 2. Do not leave fingerprints on the surface of the scanning lamp. 3. If the surface of the scanning lamp is soiled, dry wipe it. [6] [7] Figure 3-349 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 3 EXPOSURE SYSTEM 2. Points to Note When Mounting the Lamp When mounting the scanning lamp, be sure that the logo mark (or the name of the manufacturer) is toward the front. Further, be sure that the protrusion near the middle of the lamp is as shown. Caution: • Do not touch the lamp portion. • If you have replaced the scanning lamp, be sure to perform intensity adjustment (p. 11-42) and AE adjustment (p. 11-44). Logo mark (front) Scanning lamp (mirror mount moving in reverse) 45˚ (approx.
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CHAPTER 3 EXPOSURE SYSTEM 3. Removing the Thermal Fuse 1) Disconnect the power plug. 2) Remove the copyboard glass. (See Chapter 7.III.C.1. “Removing the Copyboard Glass.”) 3) Remove the two screws [1], and detach the thermal fuse [2]. [2] [1] Figure 3-351 4. Points to Note When Mounting the Fuse When mounting the thermal fuse, be sure that the thermal fuse is oriented as shown. Make sure that the fuse is in contact with the reflecting plate.
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CHAPTER 3 EXPOSURE SYSTEM 5. Removing the Thermistor Unit 1) Remove the top cover. (See Chapter 7.III.A.1. “Removing the Top Cover.”) 2) Disconnect the connector (J131) [1] from the DC controller PCB; remove the screw [2], and detach the thermistor unit [3]. [3] [2] [1] Figure 3-353 3-42 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM This chapter discusses the principles of how images are formed. It also explains the timing at which the various units involved in image formation are operated, and shows how they may be disassembled/assembled and adjusted. I. IMAGE FORMATION SYSTEM ...4-1 A. Outline ...................................4-1 B. Timing Chart for the Image Formation System .................4-3 C. Primary Charging Roller Bias Control ...................................4-4 D.
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CHAPTER 4 IMAGE FORMATION SYSTEM I. A.
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CHAPTER 4 IMAGE FORMATION SYSTEM Copyboard glass Scanning lamp Lens AE sensor Side blanking exposure lamp Developing cylinder Pre-exposure lamp Primary charging roller Photosensitive drum Static eliminator Q101 Lamp regulator block Transfer roller High-voltage circuit block Microprocessor Q900 DC controller PCB Microprocessor Composite power supply PCB Figure 4-101 4-2 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM B. Timing Chart for the Image Formation System Basic Sequence of Operations (Direct, 2 copies, continuous) Copy Start key ON STBY INTR Main motor (M1) Scanning lamp (LA1) Scanner Pre-exposure lamp Primary bias Developing AC bias Developing DC bias Transfer bias Transfer cleaning bias Transfer reference bias (ATVC) Static eliminator bias Pre-registration roller paper sensor (Q751) SCFW SCRV forward Reverse SCFW SCRV LSTR STBY -500V 0.6sec.
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CHAPTER 4 IMAGE FORMATION SYSTEM C. Primary Charging Roller Bias Control 1. Outline Figure 4-103 shows the circuit used to control the voltage applied to the primary charging roller, and has the following functions: • Turning on and off the DC bias. • Controls the DC bias to a constant voltage. • Switching the level of the DC bias. • Corrects the level of the DC bias automatically. The level of the DC bias applied to the primary charging roller is switched between image area and non-image area.
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CHAPTER 4 IMAGE FORMATION SYSTEM Main transformer T101 Primary charging roller Voltage separation circuit PDC_S DC voltage monitor signal PDC_PWM DC bias control signal P_C_S DC bias current detection signal Photosensitive drum PR_DC_ON J103 -5 J203 -5 Microprocessor (Q900) Composite power supply PCB Serial communication Microprocessor (Q101) DC controller PCB Figure 4-103 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. a. Operations Turning On and Off the DC Bias The DC bias applied to the primary charging roller is turned on or off by the serial communication signal and the primary charging bias ON signal (PR_DC_ON) from the DC controller PCB. When the Copy Start key is pressed, the DC bias ON signal (serial) and the primary charging bias ON signal (PR_DC_ON) are sent.
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CHAPTER 4 IMAGE FORMATION SYSTEM c. Switching the DC Bias Level The machine changes the level of its DC bias according to the following: copying image area, sheet-to-sheet distance, and image trailing edge margin. In addition, it is also switched while a cleaning bias is applied by the transfer roller, during which the primary charging roller applies a negative DC bias to prevent the photosensitive drum from being charged to a positive potential.
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CHAPTER 4 IMAGE FORMATION SYSTEM d.
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CHAPTER 4 IMAGE FORMATION SYSTEM D. Controlling the Transfer Roller Bias 1. Outline The circuit shown in Figure 4-105 is used to control the voltage applied to the transfer charging roller, and has the following functions: • Turning on and off the transfer bias. • Controlling the transfer bias to a constant voltage.
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. a. Operations Turning On and Off the Transfer Bias The transfer bias applied to the transfer charging roller is turned on and off by the serial communication signal from the DC controller PCB.
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CHAPTER 4 IMAGE FORMATION SYSTEM c. Correcting the Transfer Bias Voltage Level (ATVC control) The machine automatically corrects the application voltage level of the transfer bias to correct the changes in the transfer efficiency caused by the deterioration of the transfer roller or the changes in the environment. A current of a specific level (-14.6 µA) is applied to the transfer charging roller during initial rotation executed each time the Copy Start key is pressed.
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CHAPTER 4 IMAGE FORMATION SYSTEM E. Controlling the Developing/Separation Static Eliminator Bias 1.
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CHAPTER 4 IMAGE FORMATION SYSTEM High-voltage transformer for developing/ static eliminator Main transformer Developing DC bias detection circuit T101 T201 +5V Photo sensitive drum Developing cylinder Static eliminator bias generation circuit Static eliminator DC bias control signal BIAS_PWM DC bias monitor signal BIAS_S AC bias oscillation signal ACBIAS + DV_AC_ON -7 -3 DV_DC_ON J103 -4 J203 -6 Microprocessor (Q900) Composite power supply PCB Serial communication Copy density correctio
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. Turning On and Off the DC Bias The DC bias applied to the developing cylinder is turned on and off by the signal communication signal and the developing DC bias ON signal (DV_DC_ON) generated by the DC controller PCB.
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CHAPTER 4 IMAGE FORMATION SYSTEM 4.
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CHAPTER 4 IMAGE FORMATION SYSTEM The DC controller PCB keeps track of the number of copies made since replacement of the drum unit (drum counter reading, which is initialized when ‘U7’ in user mode is executed, i.e., installation/drum replacement mode). To prevent deterioration of copy images, the developing DC bias, voltage supplied to the scanning lamp, and primary charging DC bias are corrected as follows when the drum counter reading exceeds ‘20000’. Normal mode I II +15V -30V --+3.2V*1 (+5.
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CHAPTER 4 IMAGE FORMATION SYSTEM 0 Original Newspaper density Test Sheet Copy density lever 0 1 5 9 -40 -100 -100 -145 -200 -185 -200 -265 -275 -300 -400 -105 -310 -430 -435 AE1 (darker) AE5 -500 -400 -500 -550 Developing bias DC component (V) -265 -300 -435 -405 9 Density correction dial (VR107) -485 5 -550 1 AE9 (lighter) Developing bias DC component (V) AE mode Manual Density Mode Figure 4-109 COPYRIGHT © 1999 CANON INC. Figure 4-110 CANON NP6512/6612/7120/7130/7130F REV.
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CHAPTER 4 IMAGE FORMATION SYSTEM F. Measuring the Density of Originals 1. Outline The machine is equipped with an auto density adjustment (AE) mechanism designed to control the DC component of the developing bias. The AE mechanism enables production of copies free of fogging as long as the original is more or less uniform in density by varying the DC component of the developing bias according to the density of the original.
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J h g Z Y K i f e d CHAPTER 4 IMAGE FORMATION SYSTEM 2. Operations When measuring the density of an original, the scanner turns on the scanning lamp, and moves to a point 115 mm from the home position. At this time, the AE sensor reads the level of light reflected by the area shown in Figure 4-112, and sends the AE signal (AE) to the DC controller PCB.
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CHAPTER 4 IMAGE FORMATION SYSTEM 3. AE Adjustment (VR102, VR103) If you have replaced the scanning lamp or the AE sensor PCB, be sure to make the following adjustments: Making Adjustments Before the Work • Obtain a newspaper more or less even in density. (Avoid ones with photos or large characters.) • Obtain five sheets of white sheets of paper • Check to make sure that the intensity of the scanning lamp has been adjusted properly when you have replaced the scanning lamp.
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CHAPTER 4 IMAGE FORMATION SYSTEM JP104 2) Close the top unit, and connect the flexible cable from the control panel to the DC controller PCB; then, turn on the power switch. 3) Check to make sure that AE mode has been enabled, and short JP103 and JP104 on the DC control PCB with a screwdriver or the like. • The display will indicate ‘F’. SERVICE JP104 JP103 Figure 4-115 4) While the display is indicating ‘F’, stop shorting JP103 and JP104. 5) Select ‘40’ in service mode.
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CHAPTER 4 IMAGE FORMATION SYSTEM 8) Place a newspaper on the copyboard, and close the copyboard cover. 9) Turn VR102 so that the display indicates ‘A3’ through ‘Ad’. VR102 J130 AE REF VR102 J107 J131 J101 AE GAIN J103 J104 Figure 4-117 10) Remove the newspaper from the copyboard, and place five sheets of copy paper on the copyboard glass in its place; then, close the copyboard cover. 11) Turn VR103 on the DC controller PCB so that the display on the control panel indicates ‘52’ through ‘5c’.
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CHAPTER 4 IMAGE FORMATION SYSTEM 12) Repeat steps 8) through 11) so that the values of both VR102 and VR103 are target values. Caution: If you cannot set VR102 and VR103 to the target values at the same time, turn VR103 fully counterclockwise, and go back to step 8) and make adjustments once again. 13) Make a copy, and check to make sure that it is free of fogging and the characters are dark enough. • If the copy is foggy or its characters are not dark enough, go back to step 1) and start over.
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CHAPTER 4 IMAGE FORMATION SYSTEM G. Controlling the Pre-Exposure Lamp 1. Outline The machine is equipped with a pre-exposure lamp to ensure stable generation of images by removing residual charge from the photosensitive drum. 2. a. Operations Controlling the Intensity of the Pre-Exposure Lamp The intensity of the pre-exposure lamp is controlled based on the settings of ‘33’ (IP_OFST) and ‘37’ (PREX_LP) made in service mode.
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CHAPTER 4 IMAGE FORMATION SYSTEM b. Changing the Intensity The machine changes the intensity of the pre-exposure lamp between image areas and nonimage areas. Except for APVC measurement and non-image areas, the voltage used to turn on the preexposure lamp is dropped to prevent overheating inside the machine.
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CHAPTER 4 IMAGE FORMATION SYSTEM H. Controlling the Side Blanking Mechanism 1. Outline The machine is equipped with a side blanking lamp at the front and the rear used to prevent adhesion of excess toner when making reduced copies. 2. Operations To blank out the non-image area in reduce mode, the side blanking lamp is moved in relation to the distance over which the lens moves as detected by the lens shift detecting shaft.
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CHAPTER 4 IMAGE FORMATION SYSTEM II. DEVELOPING ASSEMBLY/CLEANING ASSEMBLY A. Outline The machine’s developing assembly may be locked into or out of position by means of a locking lever. The developing cylinder inside the developing assembly and the waste toner feeding blade of the drum unit are rotated by the drive of the main motor (M1).
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CHAPTER 4 IMAGE FORMATION SYSTEM B. 1. Detecting the Level of Toner Outline The level of toner inside the developing assembly is monitored by the toner level antenna and the toner level detection circuit. The toner level antenna is mounted inside the developing assembly, and an AC bias is applied to the developing cylinder. The developing cylinder and the antenna are staticaly bonded, and the level of toner is detected with reference to the changes in the degree of the bond. 2.
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CHAPTER 4 IMAGE FORMATION SYSTEM Reference: When you are turning on the power switch after making 100 copies following the detection of the absence of toner, execute toner stirring mode (about 1 min max.) to find out whether toner has been replenished.
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CHAPTER 4 IMAGE FORMATION SYSTEM C. Detecting Waste Toner The drive occurring as the result of rotation of the photosensitive drum is transmitted to the drum gear, coupling gear, and waste toner feed blade drive gear in sequence. The waste toner collected by the cleaning blade is sent to the rear of the inside of the drum unit.
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CHAPTER 4 IMAGE FORMATION SYSTEM D. 1. Primary Charging Roller Cleaning Control Outline The machine is equipped with an automatic cleaning mechanism used to remove toner and paper lint sticking to the primary charging roller. 2. Operations The primary charging roller is cleaned by turning on the primary charging roller cleaning solenoid (SL6), thereby forcing the cleaning pad against the roller. The cleaning pad is forced against the roller for about 1.5 sec.
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CHAPTER 4 IMAGE FORMATION SYSTEM Cleaning solenoid drive signal (PCSLD*) DC controller PCB Photosensitive drum SL6 Cleaning pad Primary charging roller Primary charging roller cleaning solenoid Figure 4-204 3.
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CHAPTER 4 IMAGE FORMATION SYSTEM III. DISASSEMBLY/ASSEMBLY As needed, disassemble/assemble the machine with the following in mind: 1. ! Before starting the work, turn off the power switch and disconnect the power plug for safety. 2. Unless otherwise instructed, assemble the parts by reversing the steps used to disassemble it. 3. Identify the screws by type (length, diameter) and location. 4. Use the washers where necessary.
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CHAPTER 4 IMAGE FORMATION SYSTEM A. 1. Drum Unit Outline [2] [1] [3] [4] Figure 4-301 [1] [2] [3] [4] Primary charging roller cleaning pad Primary charging roller Photosensitive drum Drum cleaner assembly 4-34 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. Removing the Drum Unit 1) Open the machine’s top unit. 2) Turn the developing locking lever [1] counterclockwise. [1] Figure 4-302 3) Turn the fixing lever [2] of the drum unit counterclockwise. [2] Figure 4-303 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 4) Pull out the drum unit [3] slowly to the front. [3] Figure 4-304 Caution: 1. Take care not to damage the photosensitive drum. 2. The photosensitive drum is highly susceptible to light. Exposure even to room light can lead to white spots or black bands on the copies. 3. Do not make a copy without the drum unit installed. Otherwise, excess loads can cause the gears of the drive system to skip teeth, generating abnormal noise. 3.
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CHAPTER 4 IMAGE FORMATION SYSTEM 4. After Replacing the Drum Unit 1) Record the date and the counter reading in the label [1] shown in the figure, and attach the label to the front cover of the new drum unit. date Datum compteur Zahler note Notiz date counter notes [1] Figure 4-305 2) Execute ‘U7’, ‘installation/drum unit replacement mode’, and enter the setting recorded on the service label attached to the drum unit. PRIMARY IP_OFST FS5-8725 Figure 4-306 COPYRIGHT © 1999 CANON INC.
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CHAPTER 4 IMAGE FORMATION SYSTEM B. Transfer Charging Assembly 1. Removing the Transfer Charging Roller 1) Open the machine's top unit. 2) Remove the screw [1]. 3) While freeing the claw [2] of the bushing, detach the transfer charging roller [3]. [2] Caution: Do not touch the surface of the roller. Be sure the surface is free of dirt. [3] [2] [1] Figure 4-307 4-38 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM C. 1. 1) 2) 3) 4) 5) 6) Blank Exposure Removing the Blanking Exposure Unit Set the machine to the maximum ratio (141%) as follows: • Turn on the power, and select a default ratio of 141%. • Press the Copy Start key. • When the lens has moved to the farthest left, turn off the power. • Disconnect the power plug. Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.”) Remove the drum unit. (See A.2. “Removing the Drum unit.
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CHAPTER 4 IMAGE FORMATION SYSTEM 8) Open the machine’s top unit farther, and hold it in place with the handle of a screwdriver (about 30 mm in diameter). Figure 4-309 9) Remove the four screws [3], and disconnect the connector [4]; then, detach the blanking exposure unit. [5]. [5] [4] [3] Figure 4-310 Caution: When mounting the blanking exposure unit, check to make sure that the blanking exposure unit PCBs are at the extreme ends and that the lens is positioned at the farthest left (141% position).
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. Removing the Pre-Exposure Lamp PCB Unit 1) Remove the drum unit. (See A.2. “Removing the Drum unit.”) 2) Disengage the two claws [1], and remove the pre-exposure lamp unit [2]. [1] [2] Figure 4-312 3) Remove the screw [3], and remove the pre-exposure lamp unit cover [4]. [3] [4] Figure 4-313 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 4) Disconnect the connector [5] (J801), and remove the pre-exposure lamp PCB unit [6]. [5] [6] Figure 4-314 Caution: Perform the following whenever you have replaced the pre-exposure lamp PCB unit. 1) Enter the setting recorded on the service label attached on the back of the PCB using ‘37’ of service mode. PREX LP FBS-0756 Figure 4-315 2) After entering the setting, execute ‘U7’ in user mode. 4-42 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.
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CHAPTER 4 IMAGE FORMATION SYSTEM D. 1. Developing Assembly Construction [2] [1] [1] Blade [3] Stirring rod [2] Hopper assembly [4] Developing cylinder Figure 4-316 2. Removing the Developing Assembly 1) Open the machine’s top unit, and remove the two screws [1]; then, remove the front upper cover [2]. [1] Caution: The flexible cable for the control panel is connected to the front upper cover; disconnect the flexible cable from the DC controller. [2] [1] Figure 4-317 COPYRIGHT © 1999 CANON INC.
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CHAPTER 4 IMAGE FORMATION SYSTEM 2) Remove the drum unit. (See A.2. “Removing the Drum unit.”) 3) Turn the toner cartridge [3] clockwise. [3] Figure 4-318 4) Put a hand under the developing assembly [4], and turn the locking lever [5] counterclockwise. • Turning the locking lever disengages the developing assembly. [5] Caution: Take care not to touch the developing cylinder. [4] Figure 4-319 4-44 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 3. Installing the Developing Assembly 1) Insert the hook [1] of the developing assembly into the hole [2] the machine’s top unit. [1] [2] Figure 4-320 2) While working as in step 1), lift the developing assembly and butt the groove [4] of the developing assembly against the hooks [3] at the rear and the front. [3] [4] [4] Figure 4-321 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 3) While working as in step 2), turn the locking lever [5] clockwise for a single notch. • The developing unit will be fixed in position while it remains unlocked. [5] Figure 4-322 4. Removing the Developing Cylinder 1) Remove the developing assembly. (See D.2. “Removing the Developing Assembly.”) 2) Turn the toner cartridge [1] clockwise, and pull it out slowly toward the front. [1] Figure 4-323 4-46 COPYRIGHT © 1999 CANON INC.
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CHAPTER 4 IMAGE FORMATION SYSTEM 3) Clean the area around the toner cartridge you have removed. Clean. Clean. Figure 4-324 4) Remove the five screws [2], and remove the cover [3]. [2] [3] [2] [2] Caution: Take care not to damage the developing cylinder and the blade when removing the cover. [2] [2] Figure 4-325 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 4 IMAGE FORMATION SYSTEM 5) Place a newspaper on the floor, and pour out the toner from the developing cylinder. 6) Remove the two screws [4], and remove the gear support plate [5] from the rear. [4] [4] [5] Figure 4-326 7) Remove the two screws [6], and remove the developing cylinder support plate [7] at the front. [6] [7] [6] Figure 4-327 8) Remove the gear [8], gear [9], bearing [10], and spacer [11]; then, remove the developing cylinder [12].
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CHAPTER 4 IMAGE FORMATION SYSTEM 5. Points to Note When Installing the Developing Cylinder a. Clean the compartment in the developing assembly used to store the toner cartridge. b. Do not leave fingerprints or oils on the surface of the developing cylinder. If necessary, dry wipe the surface with lint-free paper. c. When installing the developing assembly cover, perform the following: 1) Apply a thin coating of toner on the blade [1] with a flannel cloth.
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CHAPTER 4 IMAGE FORMATION SYSTEM 3) Turn the drive gear [4] slowly in the direction shown in the figure to give the developing cylinder a full turn. [4] Figure 4-331 6. Points to Note When Installing the Drive Gear a. Assemble the gears so that all three stirring rods [1] face the same direction. Caution: If any of the stirring rods does not face the same direction, the interference among the rods can prevent stirring operation. [1] Figure 4-332 4-50 COPYRIGHT © 1999 CANON INC.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM This chapter explains the principles used from when copy paper is picked up to when a copy is delivered in view of the functions of electrical and mechanical units and in relation to their timing of operation. It also shows how these units may be disassembled/ assembled and adjusted. I. PICKUP/FEEDING SYSTEM.......5-1 A. Outline ...................................5-1 B. Controlling the Pickup Roller .....................................5-2 C.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM I. A. PICKUP/FEEDING SYSTEM Outline The machine moves paper using a center reference method, in which paper is moved in the middle of the pickup/feeding path, and is equipped with a cassette, and multifeeder as the source of paper.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Controlling the Pickup Roller 1. Outline The machine has two types of pickup rollers, i.e., cassette pickup roller, and multifeeder pickup roller, and each of these rollers are operated by the drive of the main motor switched by means of a gear unit. (In other words, only one roller is driven at any one time.) 2.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 3. Re-Pickup (cassette pickup) If the vertical path roller paper sensor (PS4) does not detect copy paper within a specific period of time after the cassette pickup roller has started to rotate, the pickup roller is rotated once again to execute pickup operation, thereby ensuring correct pickup (as for recycled paper).
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4. Controlling the Multifeeder Pickup Roller The multifeeder pickup roller is controlled by a spring clutch, control ring, pickup clutch solenoid (SL1), gear unit, and multifeeder pickup solenoid (SL4). When the multifeeder pickup solenoid (SL4) turns on, the drive of the main motor (M1) reaches the cam gear.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 5. Controlling the Copying Speed in Multifeeder Mode The machine does not possess a copy paper width detecting function and, therefore, the temperature of the ends of the fixing assembly increases when copies are made continuously on paper narrower than A4/LTR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM C. Controlling the Movement of Paper 1. Controlling the Registration Roller The registration roller is controlled by a spring clutch, control ring, pre-registration roller paper sensor (Q751), and registration clutch solenoid (SL2). The microprocessor on the DC controller PCB turns on the registration clutch solenoid at a specific timing in response to the paper detection signal from the pre-registration roller paper sensor.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. a. Pickup/Feeding Timing Chart Pickup from the Cassette (A4, 2 copies) Copy Start key ON STBY INTR Main motor (M1) Pickup clutch solenoid (SL1) Cassette pickup solenoid (SL5) Vertical path roller paper sensor (PS4) Pre-registration roller paper sensor (Q751) Registration clutch solenoid (SL2) Delivery sensor (PS3) Scanner SCFW SCRV SCFW SCRV LSTR STBY ,, , 0.1sec (approx.) II 0.3sec (approx.) I 0.7sec (approx.) Forward Reverse Figure 5-107 b.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM D. Detecting Jams The machine is equipped with three paper sensors used to find out the presence/absence of copy paper and whether copy paper is moving properly. • Vertical path roller paper sensor (PS4) • Pre-registration roller paper sensor (Q751) • Delivery sensor (PS3) The presence/absence of a jam is checked with reference to the presence/absence of paper over a specific sensor at such times as programmed in the microprocessor.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM Copy Start key ON STBY INTR SCFW Pickup clutch solenoid (SL1) 2.6sec Jam check Pre-registration roller paper sensor (Q751) Normal Main motor (M1) Figure 5-110 (normal) Copy Start key P indication ON STBY INTR SCFW Pickup clutch solenoid (SL1) 2.6sec Jam check Pre-registration roller paper sensor (Q751) No paper 1.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Absence of Paper in the Cassette Pickup Assembly When re-pickup operation is executed (from the cassette), the absence of paper will be identified if copy paper does not reach the vertical path roller paper sensor within a specific period of time. In response, the machine will stop the main motor in about 1.5 sec, and indicate the Add Paper message. Copy Start key ON STBY P indication INTR SCFW Re-pickup Cassette pickup solenoid (SL5) 1.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4. Registration Paper Delay Jam After reaching the vertical path roller paper sensor, if copy paper fails to reach the pre-registration roller paper sensor within a specific period of time, the machine will identify the condition as a registration paper delay jam, stop the operation immediately, and flash the Jam indicator. indication SCRV SCFW SCRV Vertical path roller paper sensor (PS4) 2.6sec Jam check Pre-registration roller paper sensor (Q751) 2.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 6. Delivery Delay Jam If copy paper does not reach the delivery sensor within a specific period of time because of feeding faults, the machine will identify the condition as a delivery delay jam, stop the operation immediately, and flash the Jam indicator. Copy Start key ON STBY indication INTR SCFW SCRV SCFW Registration clutch solenoid (SL2) 4.1sec Jam check 4.1sec normal Delivery sensor (PS3) Jam 1.5sec Main motor (M1) Figure 5-117 7.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM II. DISASSEMBLY/ASSEMBLY As needed, disassemble/assemble the machine with the following in mind: 1. ! Before starting the work, turn off the power switch and disconnect the power plug for safety. 2. Unless otherwise instructed, assemble the parts by reversing the steps used to disassemble it. 3. Identify the screws by type (length, diameter) and location. 4. Use the washers where necessary.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM A. Pickup Assembly 1. Removing the Pickup Roller 1) Pull out the casssette. 2) Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.”) 3) Open the machines' top unit farther, and hold it in place with the handle of a screwdriver (about 30 mm in diameter). Figure 5-201 4) Remove the screw [1], and free the two claws [2]; then, detach the feeding assembly cover [3]. [1] [3] [2] Figure 5-202 5-14 COPYRIGHT © 1999 CANON INC.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 5) While pulling the guide plate [4] of the cassette pickup solenoid in the direction of the arrow, turn the gear [5] slightly in the direction of the arrow to disengage the guide plate [4] and the gear [6]. [5] [6] [4] Figure 5-203 6) While pulling the plunger [7] of the pickup solenoid, turn the gear [8] in the direction of the arrow so that the pickup roller [9] is oriented as shown. [7] [9] [8] Figure 5-204 COPYRIGHT © 1999 CANON INC.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 7) Using a hex wrench or the like, push the hook [10] of the pickup roller through the hole to remove the pickup roller [11]. Hex wrench [10] Caution: When removing the pickup roller, be sure to push the claw while holding the shaft in place so as to prevent the pickup roller shaft from freeing itself.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Removing the Pickup Clutch 1) Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.”) 2) Remove the registration roller unit. (See D.1. “Removing the Registration Roller Unit.”) 3) Open the machine's top unit farther, and hold it in place with the handle of a screwdriver (about 30 mm in diameter). Figure 5-207 4) Disconnect the two connectors [1], and remove the two screws [2] then, detach the solenoid unit [3].
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 5) While freeing the two claws [4], remove the pickup clutch unit [5]. [4] [5] [4] Figure 5-209 6) Remove the E-ring [6], and detach the pickup clutch [7]. [7] [6] Figure 5-210 5-18 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 3. Removing the Vertical Path Roller 1) Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.”) 2) Open the machine's top unit farther, and hold it in place with the handle of a screwdriver (about 30 mm in diameter). Figure 5-211 3) Remove the screw [1], and free the two claws [2]; then, detach the feeding assembly cover [3]. [1] [3] [2] Figure 5-212 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4) While lifting the sensor lever [4], remove the vertical path roller [5]. [5] [4] Figure 5-213 5-20 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Multifeeder Assembly 1. Removing the Multifeeder Unit 1) Open the right door. 2) Remove the two screws [1], and detach the multifeeder unit [2]. [1] [2] [1] Figure 5-214 Caution: When mounting the multifeeder unit, perform the following first: 1) Turn on the power switch; then, select the multifeeder, and press the Copy Start key. 2) When the pickup gear unit has moved as far as it can, turn off the power switch.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Removing the Multifeeder Pickup Roller 1) Remove the multifeeder unit. (See 1. “Removing the Multifeeder Unit.”) 2) Free the claw [1], and remove the gear [2] and the bushing [3]. [2] [1] [1] [3] Figure 5-216 3) Remove the multifeeder pickup roller unit [4]. [4] Figure 5-217 4) While freeing the claw [5], detach the multifeeder pickup roller [6]. [6] [5] Figure 5-218 5-22 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 3. Removing the Separation Pad 1) Remove the multifeeder pickup roller together with its shaft. (See 2. “Removing the Multifeeder Pickup Roller.”) 2) Remove the multifeeder tray. 3) Slide the side guide [1] to the inside about 3 cm, and free the two claws [2]; then, detach the holding plate [3]. [1] [3] [2] Figure 5-219 4) Push up the separation pad [4], and pull it out by pushing the shaft [5] toward the inside.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM C. Feeding Assembly [2] 1. Detaching the Feed Belt 1) Open the machine's top unit. 2) Push down the stopper [1], and remove the gear [2]. [1] Figure 5-221 3) While freeing the claw [3], detach the four shafts [4]; then, detach the feed belt [5]. [3] [4] [3] [4] [5] [5] [3] [4] [3] [3] [5] [4] [3] Figure 5-222 5-24 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM D. Registration Roller Assembly 1. Removing the Registration Roller Unit 1) Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.”) 2) Open the machine’s top unit farther, and hold it in place with the handle of a screw driver (about 30 mm in diameter). Figure 5-223 3) Remove the shaft [1] and the spring [2]. [2] [1] Figure 5-224 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4) Free the seven claws [3] and remove the transfer mount [4] and the high-voltage terminal unit [5]. [3] [3] [4] [3] [5] [3] [3] Figure 5-225 5) Remove the two springs [6]. [6] [6] Figure 5-226 5-26 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 6) Remove the two springs [7]; then, while freeing the two claws [8], remove the registration roller unit [9]. [8] [8] [7] [9] [7] Figure 5-227 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Removing the Registration Roller Clutch 1) Remove the registration roller unit. (See 1. “Removing the Registration Roller Unit.”) 2) Remove the E-ring [1] ; then, remove the gear [2] and the arm [3]. Pin [3] Caution: Take care not to drop the pin from the rear of the gear. [2] [1] Figure 5-228 3) Remove the E-ring [4]. [4] Figure 5-229 5-28 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4) Remove the two bushings [5]. [5] [5] Figure 5-230 5) While moving down the registration roller [6], detach it from the gear unit [7]. [7] [6] Figure 5-231 6) Remove the E-ring [8], and pull out the clutch [9]. Caution: Take care not to lose the pin from the rear of the clutch. [9] [8] Figure 5-232 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM E. Delivery Assembly 1. Removing the Delivery Roller 1) Remove the fixing lower roller. (See Chapter 6.II.A.3. “Removing the Fixing Lower Roller.”) 2) Remove the two screws [1], and detach the side plate [2] and the four gears [3]. [3] [3] [2] [1] Figure 5-233 3) Remove the screw [4], and free the two hooks [5]; then, detach the sensor holder [6]. [5] [6] [4] Figure 5-234 5-30 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4) Remove the two bushings [7]. [7] Figure 5-235 5) While shifting the delivery lower guide [8] toward the rear, detach the delivery roller [9]. [8] [9] Figure 5-236 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 6 FIXING SYSTEM This chapter explains the principles used to fuse toner images to transfer medium in view of the functions of electrical and mechanical units and in relation to their timing of operation. It also shows how these units may be disassembled/assembled and adjusted. I. OPERATIONS ..............................6-1 A. Outline ...................................6-1 B. Controlling the Fixing Temperature ..........................6-3 COPYRIGHT © 1999 CANON INC. II. DISASSEMBLY/ASSEMBLY ..
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CHAPTER 6 FIXING SYSTEM I. A.
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CHAPTER 6 FIXING SYSTEM Fixing film Thermal fuse 2 (FU2) Fixing heater (H1) Fixing thermistor (TH1) Fixing lower roller Cleaning roller Figure 6-101 Fixing thermistor signal (TH1) DC controller PCB Fixing film Fixing thermistor (TH1) Thermal fuse 2 (FU2) M1 Fixing heater (H1) Main motor Fixing lower roller Cleaning roller Composite power supply PCB Figure 6-102 6-2 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 6 FIXING SYSTEM B. Controlling the Fixing Temperature 1. Outline The fixing lower roller of the fixing assembly is driven by the main motor (M1). When the fixing lower roller rotates, the film of the fixing upper unit starts to rotate in conjunction. The fixing film is heated by the fixing heater (H1), which is a flat heater mounted in contact with the inner side of the film.
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CHAPTER 6 FIXING SYSTEM 2. Controlling the Temperature of the Fixing Heater The temperature of the fixing heater is switched according to the following two parameters: • Temperature of the fixing heater when the Copy Start key is pressed.
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CHAPTER 6 FIXING SYSTEM 1 Heater temperature when the Copy Start key is pressed Less than 100°C 2 100°C or more and less than 120°C 3 120°C or more Number of copies Control temperature (°C) 1 2~9 10 ~ 29 30 ~ 39 40 ~ 49 50 ~ 59 60 ~ 1~9 10 ~ 19 20 ~ 29 30 ~ 39 40 ~ 1~ 9 10~19 20~ 200 195 190 185 180 175 170 190 186 180 175 170 180 175 170 Table 6-102 Power switch ON Copy Start key ON STBY Copy Start key Copying end Copying end ON Copying STBY Copying STBY Main motor (M1) Fixing heater (H1
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CHAPTER 6 FIXING SYSTEM 3. Controlling the Temperature Supplied to the Fixing Heater The temperature of the fixing heater is controlled by controlling the power supplied to the fixing heater, and the power to the fixing heater is controlled using a phase control method. The microprocessor on the DC controller PCB controls the timing at which the fixing heater duty signal (HEAT_PWM) is generated so that power suited to the target temperature of the fixing heater may be supplied (phase control).
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CHAPTER 6 FIXING SYSTEM 5. Controlling the Power Supplied to the Fixing Heater between Sheets When the copying speed is controlled to 6 cpm to prevent overheating of the copyboard, the temperature of the fixing lower roller tends to increase because of the increased sheet-to-sheet distance. To prevent possible problems, power to the fixing heater is stopped between sheets when the copying speed is controlled to 6 cpm.
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CHAPTER 6 FIXING SYSTEM 6. Protective Functions The machine is equipped with the following protective functions to prevent malfunction of the fixing heater. a. Thermistor (TH1) The microprocessor on the DC controller PCB monitors the voltage of the thermistor (TH1); if an abnormally high or low temperature is detected, the microprocessor sends the fixing heater error signal (HEAT_ERR*) to the timer circuit and, at the same time, indicate an error code (E000 through E003).
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CHAPTER 6 FIXING SYSTEM II. DISASSEMBLY/ASSEMBLY As needed, disassemble/assemble the machine with the following in mind: 1. ! Before starting the work, turn off the power switch and disconnect the power plug for safety. 2. Unless otherwise instructed, assemble the parts by reversing the steps used to disassemble it. 3. Identify the screws by type (length, diameter) and location. 4. Use the washers where necessary.
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CHAPTER 6 FIXING SYSTEM A. 1. Fixing Assembly Construction Caution: 1. The fixing film is made from a special material. Do not touch it or subject it to dust. 2. The machine does not have a mechanism used to adjust the roller pressure. [1] [5] [1] Fixing heater [2] Fixing film [3] Inlet guide [4] [2] [3] [4] Fixing lower roller [5] Cleaning roller Figure 6-201 2. Removing the Fixing Assembly 1) Remove the front lower cover. (See Chapter 7.III.A.2. “Removing the Front Lower Cover.
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CHAPTER 6 FIXING SYSTEM 3) Remove the screw [4], and disconnect the connector [5]. [5] [4] Figure 6-203 4) Remove the two screws [6], and disconnect the connector [7]; then, detach the fixing assembly [8] by turning it in the direction of the arrow. [6] [8] [7] Figure 6-204 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 6 FIXING SYSTEM 3. Removing the Fixing Lower Roller 1) Remove the fixing assembly. (See 2. “Removing the Fixing Assembly.”) 2) Remove the two screws [1], and free the two hooks [2]; then, detach the fixing upper stay [3] by turning it in the direction of the arrow. [2] [3] [1] [2] Figure 6-205 3) Detach the harness band [4] from the side plate, and remove the fixing upper unit [5]. [5] Caution: Do not disassemble the fixing film and the fixing heater. They cannot be replaced on their own.
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CHAPTER 6 FIXING SYSTEM 4) Remove the fixing lower roller [6] together with the gear. [6] Figure 6-207 4. Removing the Cleaning Roller 1) Remove the fixing lower roller. (See 3. “Removing the Fixing Lower Roller.”) 2) Remove the cleaning roller [1] together with the bushing. [1] Figure 6-208 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS This chapter shows the machine's external parts, and explains the principles used for the machine's various control mechanisms in view of the functions of electrical and mechanical units and in relation to their timing of operation. It also shows how these units may be disassembled/assembled and adjusted. I. II. FANS ............................................7-1 POWER SUPPLY SYSTEM .........7-3 A. Outline of the Power Supply System ...............................
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS I. FANS The machine is equipped with two fans serving to discharge ozone or cool its inside. The heat exhaust fan is driven directly by the main motor (M1; through a belt and a gear), and is designed to rotate at all times while the main motor is rotating. Heat exhausting fan FM1 Figure 7-101 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS The scanner cooling fan (FM1) is turned on and off according to the temperature detected by the scanner thermistor (TH2). If the reading by the thermistor is 37.5°C or higher and the copying speed reaches 6 cpm, the fan starts to rotate. If the reading is lower than 37.5°C, on the other hand, the fan will not rotate if no more than one copy is made or while making the first copy of a continuous copying job.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS II. POWER SUPPLY SYSTEM A.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS B. Power Supply Circuit The machine's power supply consists of a composite power supply circuit in which a DC power supply, scanning lamp power supply, and high-voltage power supply are integrated on a single board. It also possesses a microprocessor for exchanges of various data with the machine's DC controller PCB. The machine's power switch is a soft switch, and the machine is equipped with an auxiliary power supply used to operate the switch.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS Door switch DS1 Relay RL601 FU102 Auxiliary power supply Main transformer T101 DC power supply +5V +24VR +24VU +5V Microprocessor (Q900) Power switch SW309 +3V BAT1 Control panel DC controller PCB Power supply Figure 7-202 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS C. Detecting an Error on the Composite Power Supply PCB The machine's composite power supply PCB is equipped with a self diagnostic function to check each power output and the communication with the DC controller PCB using the microprocessor (Q900) mounted on it. If any of the following errors occurs, the microprocessor will exchange signals with the DC controller PCB, and will indicate the result of self diagnosis on the control panel. 1.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS III. DISASSEMBLY/ASSEMBLY As needed, disassemble/assemble the machine with the following in mind: 1. ! Before starting the work, turn off the power switch and disconnect the power plug for safety. 2. Unless otherwise instructed, assemble the parts by reversing the steps used to disassemble it. 3. Identify the screws by type (length, diameter) and location. 4. Use the washers where necessary.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS A. External Covers For instructions on how to remove the ADF, see Chapter 8. [1] [2] [3] [4] [7] [6] [1] [2] [3] [4] Copyboard cover Top cover Control panel Front lower cover [5] [5] Cassette [6] Front upper cover [7] Left cover Figure 7-301 (Copyboard type) 7-8 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS [1] [2] [3] [4] [7] [6] [1] [2] [3] [4] [5] ADF Top cover Control panel Front lower cover [5] Cassette [6] Front upper cover [7] Left cover Figure 7-302 (ADF type) Note: Remove the covers as necessary when cleaning, inspecting, or repairing the inside of the machine. Those covers that may be detached from their own by mere removal of mounting screws are omitted from the discussions.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 1. Removing the Top Cover 1) Remove the copyboard cover or the ADF. 2) Open the machine’s top unit. 3) Remove the two screws [1], and detach the front upper cover [2]. [1] Caution: A flexible cable for the control panel is connected to the front upper cover. Disconnect the cable from the DC controller. [2] [1] Figure 7-304 4) Free the two claws [3], and slide the left cover [4] to detach. [3] [4] [3] Figure 7-305 7-10 COPYRIGHT © 1999 CANON INC.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 5) Remove the screw [5], and free the four claws [6]; then, detach the rear cover [7]. [7] [6] [5] Figure 7-306 6) Remove the screw [8], and detach the copyboard cover foot retainer [9]. [8] [9] Figure 7-307 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7) Free the two claw [10]; then, lift the top cover [11] to detach. [10] [10] [11] Figure 7-308 7-12 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 2. Removing the Front Lower Cover 1) Open the right door. 2) Remove the two screws [1], and detach the multifeeder unit [2]. [1] [2] [1] Figure 7-309 3) Open the machine’s top unit. 4) Remove the two screws [3], and detach the front upper cover [4]. [3] Caution: A flexible cable for the control panel is connected to the front upper cover. Disconnect the cable from the DC controller. [4] [3] Figure 7-310 COPYRIGHT © 1999 CANON INC.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 5) Remove the two screws [5] from the screw plate found at the bottom of the machine. [5] Figure 7-311 6) While freeing the five claws [6], detach the front lower cover [7]. [6] [7] [6] Figure 7-312 Caution: When mounting the multifeeder unit, be sure to perform the following first: 1) Turn on the power switch; then, select the multifeeder as the source of paper, and press the Copy Start key.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS B. Control Panel 1. Removing the Control Panel 1) Open the machine’s top unit. 2) Remove the two screws [1], and detach the front upper cover [2]. [1] Caution: A flexible cable for the control panel is connected to the front uper cover. Disconnect the cable from the DC controller. [2] [1] Figure 7-314 3) Remove the two screws [3], and free the eight claws [4]; then, detach the control panel [5].
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS C. Copyboard Glass 1. Removing the Copyboard Glass 1) Remove the top cover. (See A.1. “Removing the Top Cover.”) 2) Close the machine’s top unit. 3) Remove the two screws [1], and detach the two support plates [2]; then, detach the copyboard glass [3]. [1] [3] [2] [2] Figure 7-316 Note: When mounting the copyboard glass, be sure that the grounding plate is on the side of its top edge.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS D. Main Motor/Main Drive Assembly 1. Removing the Main Motor Unit 1) Remove the drum unit. 2) Remove the composite power supply PCB. (See E.2. “Removing the Composite Power Supply PCB.”) 3) Remove the screw [1], and detach the high-voltage PCB [2]. [1] [2] Figure 7-318 4) Remove the insulating sheet [3]. [3] Figure 7-319 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 5) Detach the fan belt [4]. [4] Figure 7-320 6) Remove the four screws [5], and detach the main motor unit [6]. [5] Caution: When installing the main motor unit, be sure to attach the fan belt. After attaching the fan belt, make sure that the belt is free of twists. [6] [5] Figure 7-321 7-18 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 2. Removing the Main Drive Assembly 1) Remove the drum unit. 2) Remove the composite power supply PCB. (See E.2. “Removing the Composite Power Supply PCB.”) 3) Remove the screw [1], and detach the high-voltage PCB [2]. [1] [2] Figure 7-322 4) Remove the insulating sheet [3]. [3] Figure 7-323 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 5) Detach the fan belt [4]. [4] Figure 7-324 6) Remove the four screws [5], and detach the main drive assembly [6]. [6] [5] Caution: When installing the main drive assembly, be sure to attach the fan belt. After attaching the fan belt, make sure that the belt is free of twists. [5] Figure 7-325 7-20 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS E. Electrical System 1. Removing the DC Controller PCB 1) Open the machine’s top unit. 2) Remove the screw [1], and detach the front upper cover [2]. [1] Caution: The flexible cable for the control panel is connected to the upper front cover; disconnect the cable from the DC controller PCB. [2] [1] Figure 7-326 3) Disconnect all connectors from the DC controller PCB, remove the screw [3], and free the five claws [4]; then, detach the DC controller PCB [5].
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 2. Removing the Composite Power Supply PCB 1) Remove the copyboard cover or the ADF. 2) Remove the left cover and the rear cover. 3) Remove the screw [1], and remove the copyboard cover foot retainer [2]. [1] [2] Figure 7-328 4) Disconnect the eleven connectors [3] from the composite power supply PCB, and disconnect the connector [4] from the main motor assembly. [3] [3] [3] [4] Figure 7-329 7-22 COPYRIGHT © 1999 CANON INC.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 5) Remove the seven screws [5], and free the five claws [6]; then, detach the composite power supply PCB [7]. [6] [5] [5] [7] [5] Figure 7-330 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 3. Points to Note When Handling the Composite Power Supply PCB 1) Some capacitors on the composite power supply hold charges when the machine’s power supply is off. Take extra care never to short the terminals of the capacitor whenever you have removed the composite power supply PCB. 2) When handling the PCB, hold its heat radiating plate (at the center) or its both edges.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 4. After Replacing the Composite Power Supply PCB 1) If you have replaced the composite power supply PCB, be sure to enter the values indicated on the PCB to ‘34’ and ‘35’ in service mode. 120V 230V 34 PW OFST 35 IP ADJ Composite power supply PCB Figure 7-332 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF I. ADF ..............................................8-1 A. Outline ...................................8-1 B Basic Construction ................8-2 C. Basic Operations ...................8-4 D. Detecting an Original ............8-6 E. Pickup Operation ...................8-8 F. Delivery .............................. 8-12 G. Controlling the Pickup Motor .................................. 8-14 COPYRIGHT © 1999 CANON INC. II. H. Controlling the Belt Motor .. I. Detecting Original Jams .....
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CHAPTER 8 ADF I. ADF A. Outline The ADF picks up the originals stacked on the original tray starting with the topmost original, moves them through the copyboard, and delivers them. See Figure 8-101 for an outline of the feeding route. Original tray ADF Copier Figure 8-101 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF B Basic Construction 1. Outline of the Electric Circuitry The ADF’s major electrical mechanisms are controlled by the CPU on the ADF controller PCB. The CPU on the ADF controller PCB reads the signals from the sensors and the copier and generates signals to drive the motor at such times as programmed in advance. The copying modes selected on the copier are communicated to the ADF in serial, and the ADF communicates to the copier the state of feeding originals to the copier in serial.
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CHAPTER 8 ADF 2. a. Inputs to and Outputs from the ADF Controller PCB Inputs to and Outputs from the ADF Controller PCB (1/1) ADF controller PCB +24V ADF switch J6-1 MS1 -2 ADFC When ADF is opened, '1'. +5V J5-1 Delivery sensor -3 -2 PI1 J105 Registration paper sensor PI2 PDP1 When original is detected, '1'. (when light-blocking plate is at sensor) +5V J5-4 -6 -5 PDP2 When original is detected, '0'.
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CHAPTER 8 ADF C. Basic Operations 1. Outline The ADF uses two motors for picking up and delivering originals. The pickup motor (M2) is used to pick up originals, and the belt motor (M1) is used to move, stop, and deliver originals. Further, the ADF is equipped with three sensors for monitoring the movement of originals. The ADF is designed to accommodate one-sided original copying mode only.
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CHAPTER 8 ADF 2. One-Sided Original Mode The ADF picks up originals stacked on the original tray starting with the topmost original; after it picks up an original, it places it on the copyboard glass for copying, moves it away from the copyboard glass, and delivers it to the copyboard glass. Delivery tray Originals Original tray Placing originals Picking up an original Feeding 1 Feeding 2 Copying Delivering Figure 8-105 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF D. Detecting an Original 1. Outline The ADF’s original detection mechanism has the following two functions: 1. Detecting the Presence/Absence of an Original Checks whether there is an original on the original tray. 2. Identifying the Length of the Original Checks the length of the original placed on the original tray. 3. Detecting the Presence/Absence of an Original The original placement sensor (PI3) is used to check the presence/absence of an original.
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CHAPTER 8 ADF 2. Identifying the Length of the Original The registration paper sensor (PI2) is used to identify the length of the original, if any. The ADF controller computes the length of the original based on the time it takes for the original to move past the registration paper sensor (PI2). Using the result of the computation, the ADF controller determines whether the size of the original is A4/LTR or smaller or LGL, thereby switching to the appropriate ADF operation.
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CHAPTER 8 ADF E. Pickup Operation 1. Operation When an original is placed on the original tray and the Copy Start key is pressed, the following sequence of operations takes place: 1 Preparing for PickUp Operation When an original is placed on the original tray, i.e., the original placement sensor (PI3) turns ON, the pickup roller rotates counterclockwise and the paper guide holds the original in place.
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CHAPTER 8 ADF 3 Arching The first original is butted against the registration roller so that it arches. 1st original Arching Registration roller Figure 8-110 4 Feeding Operation 1 The feeding belt is moved so that the leading edge of the first original comes into contact with the delivery sensor (PI1). (In the case of a LGL original, the original is moved about 15 mm farther after it has come into contact with the delivery sensor.
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CHAPTER 8 ADF 5 Feeding 2 The feeding belt is moved counterclockwise so that the first original is stopped at a specific location on the copyboard glass. 1st original Feeding belt Figure 8-113 6 Moving the Scanner and Picking Up the Second Original The scanner starts to move forward after the original has been stopped at a specific location on the copyboard glass.
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CHAPTER 8 ADF 2. Sequence of Pickup Operations (A4/LTR, 2 originals) Original set Copy Start key ON Preparing for pickup Picking up /separating Pickig up Feeding 1 Copying Feeding 2 Picking up 2nd original Preparing for pickup of 2nd original Arching Pickup motor (M2) Belt motor (M1) Original detection sensor (PI3) Registration sensor (PI2) Delivery sensor (PI1) : motor CCW rotation Figure 8-115 3.
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CHAPTER 8 ADF F. Delivery 1. Operations The ADF operates as follows to deliver originals from the copyboard glass: 1 Delivery Feeding The feeding belt is moved to feed and deliver the first original on the copyboard glass. At the same time, the pickup motor (M2) moves the second original to the copyboard glass.
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CHAPTER 8 ADF 2. Sequence of Operations (A4/LTR, 2 originals) Original set Copy Start key ON Picking up /separating 1st original Copying,picking Delivering 1st original/ up/separating picking up 2nd original 2nd original Copying Delivering Pickup motor (M2) Belt motor (M1) Original detection sensor (PI3) Registration sensor (PI2) Detecting length Delivery sensor (PI1) : motor CCW rotation : motor low-speed rotation Figure 8-119 3.
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CHAPTER 8 ADF G. Controlling the Pickup Motor 1. Outline Figure 8-121 is a diagram of the control circuit for the pickup motor (M2). The pickup motor is a DC motor. The CPU (Q1) on the ADF controller PCB sends the motor drive signals PM0 and PM1 to the motor driver (Q5). The pickup motor rotates clockwise or counterclockwise according to the combinations of the states of these two signals. (Table 8-102 shows how the pickup motor rotates for each combination.
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CHAPTER 8 ADF H. Controlling the Belt Motor 1. Outline Figure 8-122 is a diagram showing the control circuit for the belt motor (M2). The belt motor is a 4-phase control stepping motor. The CPU (Q1) on the ADF controller PCB sends control pulse signals (A, A*, B, B*) to the motor driver (Q4). In response, the motor driver changes the output timing of the pulse signals (MA, MA*, MB, MB*) used for driving the motor to rotate the belt motor clockwise or counterclockwise.
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CHAPTER 8 ADF I. Detecting Original Jams The ADF is equipped with three jam sensors (PI1 through PI3) as indicated in Figure 8-123 to monitor the movement of originals. The movement of originals are checked at such times as programmed in the CPU on the ADF controller PCB; a jam is identified in relation to the presence of an original at each sensor. Table 8-103 describes the type of jam, condition of detection, and sensors involved.
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CHAPTER 8 ADF J. Power Supply 1. Outline Figure 8-124 shows the routes of power supply. The ADF is supplied by the copier with 5 V and 24 V. The 24V supply is cut off when the ADF is opened, i.e., when the ADF switch (MS1) turns off. The 5V supply will continue to keep each sensor powered even when the ADF is opened.
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CHAPTER 8 ADF II. DISASSEMBLY/ASSEMBLY As needed, disassemble/assemble the machine with the following in mind: 1. ! Before starting the work, turn off the power switch and disconnect the power plug for safety. 2. Unless otherwise instructed, assemble the parts by reversing the steps used to disassemble it. 3. Identify the screws by type (length, diameter) and location. 4. Use the washers where necessary.
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CHAPTER 8 ADF A. Removing the ADF 1) Open the machine’s top unit. 2) Free the two claws [1], and slide the left cover [2] to detach. [2] [1] [1] Figure 8-201 3) Remove the screw [3], and free the four claws [4]; then, the detach the rear cover [5]. [5] [4] [3] Figure 8-202 4) Close the machine’s top unit. 5) Remove the two screws [6], and remove the fixing plate [7]. [6] [7] Figure 8-203 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 6) Disconnect the two connectors [8], and remove the screw [9]; then, remove the cable bush [10]. [10] [8] [9] [8] Figure 8-204 7) Remove the two lockpin [11], and remove the ADF from the copier. [11] [11] Figure 8-205 8-20 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF B. External Covers [1] [2] [1] Upper cover [2] Lower cover Figure 8-206 Remove the covers as follows when cleaning, checking, or repairing the inside of the machine: 1) Remove the ADF from the copier. (See “A. Removing the ADF.”) 2) Remove the feeding roller [1] from the bushing [2]. [1] [2] [1] [2] Figure 8-207 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 3) Remove the six screws [3], and separate the lower cover [4] from the upper cover [5]. [3] [3] [4] [3] [5] Figure 8-208 4) Disconnect the connector [6], and remove the lower cover [4]. [4] [6] Figure 8-209 8-22 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF C. Drive System 1. Drive Unit 1) Remove the lower cover. (See “B. External Covers.”) 2) Remove the screw [1] and the bushing [2]; then, remove the pickup roller cover [3]. [1] [3] [2] Figure 8-210 3) Remove the E-ring [4], and remove the bearing [5]. [5] [4] Figure 8-211 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 4) Remove the timing belt [6], and remove the feeding belt roller [7] by shifting it in the direction of the arrow. [6] [7] Figure 8-212 5) Remove the five screws [9], and remove the right hinge unit [8]. [9] [9] [9] Figure 8-213 6) Remove the stop ring [10] (resin) and the bushing [11]. [11] [10] Figure 8-214 8-24 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 7) Disconnect the two connectors [12], and remove the five screws [13]; then, remove the drive unit [14]. [13] [14] [13] [12] Figure 8-215 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF D. Feeding System 1. Pickup Roller 1) Remove the drive unit [1]. (See “C.1. Drive Unit.”) [1] Figure 8-216 2) Remove the E-ring [2], and remove the shaft [3]; then, detach the pickup roller 1 [4]. [4] [3] [2] Figure 8-217 3) Remove the stop ring [5]. [5] Figure 8-218 8-26 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 4) Remove the two straight pins [6], and remove the pickup roller 2 [8] while moving the cover [7] in the direction of the arrow. [7] [8] [6] [6] Figure 8-219 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 2. Registration Roller 1) Remove the lower cover. (See “B. External Covers.”) 2) Remove the link arm [1] from the registration roller shaft [2] by turning the link arm. [2] [1] Figure 8-220 3) While pushing the bushing [3] in the direction of the arrow, pull out the registration roller shaft [2] slowly. [2] [3] Figure 8-221 8-28 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 3. Feeding Belt 1) Remove the lower cover. (See “B. External Covers.”) 2) Remove the two tension springs [1]. [1] Figure 8-222 3) Remove the E-ring [2], and remove the bearing [3]. [3] [2] Figure 8-223 4) Remove the timing belt [4], and remove the feeding belt drive roller [5] by moving it in the direction of the arrow. [4] [5] Figure 8-224 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 5) Remove the two equalizer spring [6] and the two feeding belt rolls [7]. [6] [7] [6] [7] Figure 8-225 6) Remove the two screws [9], and remove the delivery sensor unit [8]. [9] [8] Figure 8-226 7) Remove the stop ring [10] (made of resin); then, remove the bushing [11]. [10] [11] Figure 8-227 8-30 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF 8) Remove the screw [12], and remove the grounding wire [13]; then, remove the delivery roller unit [14] by moving it in the direction of the arrow. [14] [12] [13] Figure 8-228 9) Remove the screw [15], and remove the static eliminating brush [16]. [16] [15] Figure 8-229 10) Remove the two E-rings [17]; then, remove the timing belt [18], gear [19], and two bushings [20]. [20] [17] [20] [19] [17] [18] Figure 8-230 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.
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CHAPTER 8 ADF 11) Pull out the actuator [21] in the direction of the arrow; then, remove the feeding belt link roller [22], and remove the feeding belt [23]. [23] [21] [22] Figure 8-231 8-32 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 8 ADF E. Electrical System 1. ADF Controller PCB 1) Remove the lower cover. (See “B. External Covers.”) 2) Disconnect the five connectors [1], and remove the two screws [2]; then, remove the ADF controller PCB [3]. [1] [3] [2] [2] [1] Figure 8-232 2. Original Placement Sensor and Registration Paper Sensor Pay attention to the colors of the cables and connectors when connecting the connectors of the original placement sensor and the registration paper sensor.
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CHAPTER 9 INSTALLATION I. II. SELECTING THE SITE ...............9-1 UNPACKING AND INSTALLATION ............................9-2 A. Unpacking and Installation ....9-2 COPYRIGHT © 1999 CANON INC. B. Placing Copy Paper............ 9-18 III. MOVING THE MACHINE .......... 9-21 CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 9 INSTALLATION I. SELECTING THE SITE Keep the following in mind when selecting a site for installation; if possible, visit the user's before delivery of the machine: • The site offers a power outlet whose rating is as specified (±10%) and which may be used exclusively for the machine. • The site is between 7.5°C/45.5°F and 32.5°C/90.5°F in temperature and between 5% and 85% in humidity. Avoid an area near water faucets, water boilers, humidifiers, and refrigerators.
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CHAPTER 9 INSTALLATION II. UNPACKING AND INSTALLATION When a piece of metal is brought in from a cold to warm place, droplets of water tend to form on its surface. This phenomenon is known as "condensation" and, in machines, can cause blank copies. If the machine has been brought in from a cold place, leave it alone at least for one hour before starting to install it. A. Unpacking and Installation 1.
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CHAPTER 9 INSTALLATION Step 4 Work Remove the shipping attachment [2] (black screw) from the right side of the machine. Checks and remarks Shipping attachment [2] You will be storing the shipping attachment [2] inside the machine in step 10. 5 Take out the protective member from the manual feed tray. Protective member Caution: This step applies only if the manual feed tray is attached. Attach the manual feed tray that comes with the machine.
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CHAPTER 9 INSTALLATION Step 6 Work Open the copyboard cover, and remove the protective sheet; then, close the cover. (Copyboard type only) Checks and remarks Caution: If the protective sheet is not fond on the machine, go to the next step. Protective sheet Open the ADF, and remove the protective members; then, close the ADF. (ADF type only) ADF Caution: You will need this protective member when relocating the machine. Be sure to store it away appropriately.
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CHAPTER 9 INSTALLATION Step 8 9 Work Pick the fixing member from the bottom of the top unit, and detach it. Checks and remarks Fixing member Remove the sheet from the bottom of the machine by pulling it in the direction of the arrow. Caution: If the sheet is not found on the machine, go to the next step. Sheet 10 Store the shipping attachments [1] and [2] removed in steps 3 and 4 in the machine's bottom unit. COPYRIGHT © 1999 CANON INC. Shipping attachments CANON NP6512/6612/7120/7130/7130F REV.
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CHAPTER 9 INSTALLATION 2. Installing the Drum unit Step 1 Work Turn the developing assembly locking lever counterclockwise. 2 Turn the drum unit releasing lever counterclockwise. 3 Remove the drum unit. Checks and remarks Developing assembly locking lever Drum unit releasing lever Drum unit 4 Place the drum unit on a flat surface, and remove the two protective members. Protective members Note: Do not touch the surface of the drum when handling the drum unit.
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CHAPTER 9 INSTALLATION Step 5 Work Record the settings of 'PRIMARY' and 'IP_OFST' indicated on the label attached to the front of the drum unit on an appropriate piece of paper. Note: You will need these settings in steps 4 and 6 of "Adjusting the Machine". 6 8 Label Drum unit Insert the drum unit into the machine. When doing so, hold the drum unit horizontal in relation to the top unit, and act with care. • Be sure to slide in the drum unit until it butts against the rear end.
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CHAPTER 9 INSTALLATION Step 9 Work Turn the developing assembly locking lever clockwise. Checks and remarks Developing assembly locking lever Note: If the drum unit releasing lever was not turned clockwise in step 7, you would not be able to turn the developing assembly locking lever clockwise. Further, you would not be able to close the machine's top unit unless you turned the locking lever clockwise. 9-8 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 9 INSTALLATION 3. Installing the Toner Cartridge Step 1 Work Prepare to insert a new toner cartridge. Checks and remarks Toner cartridge 2 While holding the toner cartridge horizontal, shake it left and right so that the toner inside it is fully stirred and even. Shake to left and right Toner cartridge 3 Insert the toner cartridge into the machine. Be sure to hold it horizontal and work with care. Moreover, be sure to insert the toner cartridge until it butts against the rear end.
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CHAPTER 9 INSTALLATION Step 5 Work Holding the grip of the toner cartridge, turn it counterclockwise until the cartridge locks into place. Checks and remarks Toner cartridge Note: • Be sure to turn the toner cartridge until it locks into place. If it is not locked, you will not be able to close the top unit. • If you cannot turn the grip of the toner cartridge, check to find out if the toner cartridge has been inserted fully to the rear end.
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CHAPTER 9 INSTALLATION 4. Attaching the ADF Auxiliary Tray (ADF type only) Step 1 2 Work Open the original tray. While bending the ADF auxiliary tray in the direction of arrows in the figure, insert it into the holes on the edge of the original tray. Checks and remarks Original tray Holes Auxiliary tray 3 Slide in and out the auxiliary tray several times to make sure that it moves smoothly. 4 Close the original tray. COPYRIGHT © 1999 CANON INC.
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CHAPTER 9 INSTALLATION Step 5 Work All notations on the label attached to the ADF is in English. If a non-English language is needed, select the appropriate label from among those that come with the machine and stick it. Checks and remarks Label Label 9-12 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 9 INSTALLATION 5. Connecting the Power Cord Step 1 Work Insert one end of the power cord to the machine’s power supply unit. Checks and remarks Power supply unit Note: Do not connect the power plug and turn on the power before completing "Setting Up the Machine" and "Installing the Drum Unit" to avoid damage to the machine. Power cord 2 Connect the power plug to the power outlet.
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CHAPTER 9 INSTALLATION 6. Adjusting the Machine Step 1 Work Use "Installation/drum unit replacement mode" (U7) of the user mode to adjust the machine. To enter this mode, hold down the Exposure Mode Select key for 4 sec or more so that the display will indicate 'U1'. 2 Enter "Installation/drum unit replacement mode" (U7). Press down the [+] key several times until the display indicates 'U7'. • If you have inadvertently moved past the mode, press the [-] key to move back.
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CHAPTER 9 INSTALLATION Step 5 Work Press the Copy Start ( ) key. • The display will indicate '72' to indicate that "IP_OFST" adjustment mode has started. 6 Adjust "IP_OFST" Using the [+] or [-] keys, enter the setting of "IP_OFST" you recorded in step 5 of "2. Installing the Drum Unit". • During adjustment, the display will indicate " ". 7 Press the Copy Start ( ) key. • The display will indicate '73'. 8 Press the Copy Start ( ) key. • The display will indicate '74'. COPYRIGHT © 1999 CANON INC.
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CHAPTER 9 INSTALLATION Step 9 7. Work Press the Copy Start ( ) key. • The machine will start to stir the toner and start auto adjustment. The display will indicate '1' when the machine finishes installation/drum unit replacement mode. • Stirring of toner and auto adjustment take about 1 minute. Make use of this period by mounting the copy tray as follows: Checks and remarks Installing the Copy Tray Step 1 Work Attach the copy tray into the machine.
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CHAPTER 9 INSTALLATION 8. Sticking the Label Step 1 Work Open the machine’s top unit; then, select the appropriate label from among those that come with the machine and stick it. Checks and remarks Label 9. Checking the Operation Step 1 Work Set the Test Sheet on the copyboard glass, and check copying operation. 2 Clean the machine’s exterior and the area around it. COPYRIGHT © 1999 CANON INC. Checks and remarks • Make sure there is no abnormal noise.
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CHAPTER 9 INSTALLATION B. Placing Copy Paper 1. Universal Cassette Step 1 Work Take out the cassette from the machine, and remove the protective members and the label. 2 Remove the rear guide plate as shown, and mount it back to suit the size of the copy paper to be used. 3 Turn the fixing lever (front, rear) of the side paper guide plate as shown, and unlock the side paper guide plate.
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CHAPTER 9 INSTALLATION Step 5 Work Place copy paper in the cassette, and set the cassette into the machine. 6 All text on the label attached to the cassette is English. If you need to replace it with a nonEnglish label, select the appropriate one from among those packaged with the machine, and attach it. Checks and remarks Language label for cassette COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 9 INSTALLATION 2. 250-Sheet/500-Sheet Cassette Step 1 Work Take out the cassette from the machine, and remove the protective member. 2 Slide the rear end paper guide plate as shown to match the size of the paper to be used. Checks and remarks Caution: This step applies to the 500-sheet cassette (LTR/LGL) only. Rear end guide plate 3 Place copy paper in the cassette; then, set the cassette in the machine. 500-sheet cassette 250-sheet cassette 9-20 COPYRIGHT © 1999 CANON INC.
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CHAPTER 9 INSTALLATION III. MOVING THE MACHINE If you need to move the machine by truck or any other means of transportation after installation, be sure to perform the following: Caution: Before starting the following work, check to make sure that the machine is not too hot. If it is, as immediately after continuous copying, you may not be able to carry out step 8, in which the shipping attachment is replaced. Step 1 2 3 4 5 Work Turn on the power, and press the Default Ratio key to select 70%.
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CHAPTER 9 INSTALLATION Step 8 Work Fit the shipping attachments [1] and [2] detached in step 5 back to the machine. Checks and remarks Shipping attachment [1] Shipping attachment [2] 9 Tape the machine’s top unit in place to prevent it from opening. 10 Place A4/LGL copy paper on the copyboard glass, and close the copyboard cover; then, tape it in place. (Copyboard type only) Raise the ADF.
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CHAPTER 10 MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS ....................................... 10-1 COPYRIGHT © 1999 CANON INC. II. DURABLES AND CONSUMABLES ...................... 10-1 III. SCHEDULED SERVICING ....... 10-1 CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 10 MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS The machine does not have parts which must be replaced on a periodical basis. II. DURABLES AND CONSUMABLES The machine does not have items designated as durables or consumables. III. SCHEDULED SERVICING The machine does not have any parts which require scheduled servicing. COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING I. MAINTENANCE AND INSPECTION ............................ 11-3 A. Image Adjustment Basic Procedure ........................... 11-3 B. Points to Note for Servicing ............................ 11-4 II. STANDARDS AND ADJUSTMENTS ....................... 11-5 A. Mechanical ......................... 11-5 B. ADF .................................. 11-30 C. Electrical ........................... 11-41 III. TROUBLESHOOTING IMAGE FAULTS ................................... 11-52 A.
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CHAPTER 11 TROUBLESHOOTING Guide to the Troubleshooting Procedure This chapter provides troubleshooting instructions in the form of tables prepared based on generally found flow charts. Study the following for an idea of how to use them: AC power is absent.
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CHAPTER 11 TROUBLESHOOTING (Step) (Checks) 1 Is the power plug connected to the power outlet? (YES/NO) (Action) NO Connect the plug. NO Close the door or the cover. NO Advise the user that the problem is not the copier's. YES 2 Are the front door and the delivery cover closed firmly? YES 3 Is the rated voltage present at the power source? YES Rest omitted.
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I. MAINTENANCE AND INSPECTION A. Making Pre-Checks Image Adjustment Basic Procedure Adjusting the Optimum Density Clean the parts. Scanning system, pickup/feeding system, delivery assembly Is gray scale No. 9 barely visible? YES NO NO Set it at the center.
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B. Points to Note for Servicing Optical path Part Tools/sovents Lens Blower brush Cleaning. Reflecting plate Blower brush Cleaning. No. 1/No. 6 mirror Blower brush or alcohol and lint-free paper ADF Scanning lamp Item Work/remarks Moist cloth Cleaning with a blower blush; if dirt cannot be removed, use alcohol and lint-free paper. Cleaning. Work/remarks Tool/solvent Feeding belt Cloth moistened with water* Dry-wiping. Separation pad Cloth Cleaning.
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CHAPTER 11 TROUBLESHOOTING II. STANDARDS AND ADJUSTMENTS A. Mechanical 1. a. Copier Leading Edge Non-Image Width Make adjustments so that the leading edge non-image width is 2.0 ±1.5 mm when the Test Sheet is copied in Direct. Caution: If you have performed this adjustment, be sure to adjust the image leading edge margin. 2.0±1.5mm Figure 11-201 Making Adjustments 1) Select '31' in service mode. • The display will indicate '31'. 2) Press the Copy Start key. • The existing setting will flash.
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CHAPTER 11 TROUBLESHOOTING b. Image Leading Edge Margin (registration activation timing) Make adjustments so that the leading edge margin is 2.5 ±1.5 mm when the Test Sheet is copied. Caution: Be sure to check that the leading edge non-image width is as indicated before performing this adjustment. 2.5±1.5mm Figure 11-202 Making Adjustments 1) Select '30' in service mode. • The display will indicate '30'. 2) Press the Copy Start key. • The existing setting will flash.
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CHAPTER 11 TROUBLESHOOTING c. Adjusting the Mirror Position (optical length between No. 1 mirror and No. 2 mirror) If you have replaced the scanner drive cable, you must adjust the mirror position, by changing the position of the cable retainer of the No. 1 mirror mount. Reference: 1. As more and more copies are made, the cable tends to become slack, requiring adjustment. 2. If the optical length between the No. 1 mirror and the No.
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CHAPTER 11 TROUBLESHOOTING 4) Turn the cable drive pulley [3] so that the three shafts [2] of the mirror positioning tool for the front and the rear may be arranged as shown. [2] [3] [2] Figure 11-205 (rear) [2] [2] Figure 11-206 (front) 11-8 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 5) While keeping the condition of 4), tighten the positioning screw at the rear and the front of the No. 1 mirror mount [1]. [1] Figure 11-207 (rear) [1] Figure 11-208 (front) COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING d. Checking the Force of the Cassette Spring If the force of the spring used to hold up the holding plate of the cassette is not correct, pickup faults or the like can occur.
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CHAPTER 11 TROUBLESHOOTING e-1. Routing the Scanner Drive Cable Wind 1.5 times. (black cable) Wind 7.5 times. (silvercolored cable) Figure 11-210 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING e-2. Routing the Scanner Drive Cable 1. Before Starting the Work Prepare the following: • Mirror positioning tool (FY9-3009) • Cable clip (FY9-3017) • Adhesive tape 1) Set the mirror positioning tool as shown. Figure 11-211 2) Prepare about five strips of adhesive tape (each one about 20 x 50 mm). 3) Remove the copyboard glass. (See Chapter 7.III.C.1. “Removing the Copyboard Glass.”) 4) Disconnect the connectors (J101, J131) [1] from the DC controller PCB.
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CHAPTER 11 TROUBLESHOOTING 5) If the machine is equipped with an ADF, free the hook [2], and disconnect the two relay connectors [3] from the left upper stay [4]. [2] [3] [2] [4] [3] [2] [2] Figure 11-213 6) Remove the three screws [5], and detach the left upper stay [4]. [5] [5] [4] Figure 11-214 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 7) Remove the four screws [7], and detach the lens cover [8]. [7] [7] [8] Figure 11-215 11-14 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 2. Routing the Reversing Cable 1) Wind the reversing cables (silver-colored) [2] on the cable drive pulley [1] 7.5 times with the longer of the two on top; then, secure it in position with a cable clip [3]. [1] Longer end Shorter end [2] Face with a marking Figure 11-216 [1] [3] [3] Top view Figure 11-217 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 2) Put the cable drive pulley [1] into the shaft [4], and secure it in position with an E-ring [5]. When putting the cable drive pulley into the shaft, be sure that the hook is at the front. [5] Hook [1] (front) [4] Figure 11-218 3) Hook the shorter end [6] on the pulley [7]. [7] [6] Figure 11-219 11-16 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 4) Lead the shorter end [6] under the No. 1 mirror mount [8] and the No. 2/3 mirror mount [9]; then, hook it on the left rear pulley [10] and the pulley [11] of the No. 2/3 mirror mount. [11] [9] [8] [10] [6] Figure 11-220 5) After fitting the shorter end [6] on the cable hook [12], secure its end with adhesive tape [13]. Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches.
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CHAPTER 11 TROUBLESHOOTING 6) Lead the longer end [14] along the cable drive pulley, and hook it on the pulley [15] on the right front side. [14] [15] [1] Figure 11-222 7) Lead the longer end [14] under the No. 1 mirror mount [8] and the No. 2/3 mirror mount [9]; then, hook it on the pulley [16] on the left front side and the pulley [17] of the No. 2/3 mirror mount. [17] [8] [14] [16] [9] Figure 11-223 11-18 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 8) Hook the longer cable [14] on the cable hook [18]; then, secure its end to the left side with adhesive tape [19]. Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches. [18] [19] [14] Figure 11-224 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 3. Routing the Forwarding Cable 1) Fit the longer end forwarding cable (black) [2] on the top hook of the cable drive pulley [1], and wind it 1.5 times. Then, secure the shorter end [3] as shown with adhesive tape [4]. [4] [3] Face without a marking [2] [1] Figure 11-225 2) Lead the longer end [5] along the cable drive pulley [1] as shown, and hook it on the pulley [6] on the right front side. [1] [5] [6] Figure 11-226 11-20 COPYRIGHT © 1999 CANON INC.
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CHAPTER 11 TROUBLESHOOTING 3) Lead the longer end [5] under the No. 1 mirror mount [7]; then, hook it on the pulley [8] of the No. 2/3 mirror mount, and lead it between the No. 1 mirror mount [7] and the scanning lamp [9]. [8] [7] [9] [5] Figure 11-227 4) Hook the end of the longer end [5] on the hole [10] on the right side. [10] [5] Figure 11-228 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 5) Free the shorter end [3], and hook it on the pulley [11] on the right rear side. [3] [11] Figure 11-229 6) Lead the shorter end [3] under the No. 1 mirror mount [7], and hook it on the pulley [12] of the No. 2/3 mirror mount as shown; then, lead it between the No. 1 mirror mount [7] and the scanning lamp [9]. [12] [3] [9] [7] Figure 11-230 11-22 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 7) Hook the end of the shorter end [3] on the hole [13] on the right side. [3] [13] Figure 11-231 8) Free the shorter end [3] and the longer end [5] (reversing cable), and connect both with a spring [14]; then, fit the stopper [15]. [14] [3] [15] [5] Figure 11-232 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 9) Detach the pulley clip [16] from the cable drive pulley [1]. [1] [16] Figure 11-233 11-24 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 4. Positioning the No. 1 Mirror Mount 1) Fix the rear and the front of the No. 1 mirror mount [1] temporarily to the metal fixing [2] of the forwarding cable. [1] [2] Figure 11-234 (rear) [2] [1] Figure 11-235 (front) COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 2) Turn the cable drive pulley [4] so that the three shafts [3] of the mirror positioning tool for rear and front is as shown. [4] [3] [3] Figure 11-236 (rear) [3] [3] Figure 11-237(front) 11-26 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 3) While keeping the condition of step 2), tighten the positioning screw on the rear and front of the No. 1 mirror mount [1]. [1] Figure 11-238 (rear) [1] Figure 11-239 (front) COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING f. Point to Note When Mounting the Scanning Lamp When mounting the scanning lamp, be sure that its logo mark (manufacturer's name) is toward the front. Further, be sure that the protrusion near its middle is as shown. Logo mark (front) Scanning lamp (mirror mount moving in reverse) 45˚ (approx.) Figure 11-240 Caution: • If you have replaced the scanning lamp, you must adjust the intensity of the lamp (p. 1144) and perform AE adjustment.
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CHAPTER 11 TROUBLESHOOTING g. Points to Note When Mounting the Fuse When mounting the thermal fuse of the No. 1 mirror mount, be sure that the fuse is oriented as shown. Make sure that the fuse is in contact with the reflecting plate. Reflecting plate (front) Thermal fuse Figure 11-241 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING B. ADF 1. Adjusting the Original Stop Position Adjust the original stop position in the following order: 1. Correcting original skew 2. Adjusting the rear/front original stop position 3. Adjusting the original leading edge stop position 2. Correcting Original Skew 1) Obtain a sheet of A4 or LTR white copy paper, and draw two lines as indicated. • The sheet will be used as a test sheet.
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CHAPTER 11 TROUBLESHOOTING 3) Press the Copy Start key to make a copy. 4) Check to make sure that the difference between L1 and L2 on the copy is 1.8 mm (standard) or less. L1 L2 280mm Copy image L1-L2=0±1.8mm Figure 11-244 5) If the difference is not as specified, turn the adjusting screw found to the side of the left hinge unit to make adjustments.
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CHAPTER 11 TROUBLESHOOTING 3. Adjusting the Rear/Front Original Stop Position You must first correct original skew before adjusting the rear/front original stop position. 1) Obtain a sheet of A4 or LTR white copy paper, and draw two lines as indicated. • The sheet will be used as a test sheet. 10mm 10mm A4/LTR copy papper Figure 11-246 2) Remove the original tray cover from below the original tray. Original tray cover Figure 11-247 11-32 COPYRIGHT © 1999 CANON INC.
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CHAPTER 11 TROUBLESHOOTING 3) Turn on the machine, and place the test sheet prepared in step 1) on the original tray. Figure 11-248 4) Press the Copy Start key to make a copy. 5) Check to make sure that the distance L3 on the copy image indicated is 10 ±2.5 mm (standard) or less. L3 Copy image L3 =10±2.5mm Figure 11-249 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 6) If the distance is not as specified, loosen the pinion gear positioning screw under the original tray, and adjust the position of the pinion gear. Pinion gear Pinion gear positioning screw A B Figure 11-250 Relationship between Pinion Gear Position and L3 Direction of pinion gear A B L3 Increases Decreases Table 11-204 11-34 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 4. Adjusting the Original Leading Edge Stop Position You must first correct original skew and adjust the rear/front original stop position before adjusting the original leading edge stop position. 1) Obtain a sheet of A4 or LTR white copy paper, and draw two lines as indicated. • The sheet will be used as a test sheet. 10mm 10mm A4/LTR copy papper Figure 11-251 2) Remove the screw, and remove the ADF controller cover.
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CHAPTER 11 TROUBLESHOOTING 3) Turn on the machine, and place the test sheet prepared in step 1) on the original tray. Figure 11-253 4) Press the Copy Start key to make a copy. 5) Check to make sure that the distance L4 on the copy image indicated is 10 +2.0, -2.5 mm (standard) or less. L4 Copy image L4 =10±2.0mm Figure 11-254 11-36 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING F012 A ON 789 1 2 3456 B CDE 6) If the distance is not as specified, shift bit 1 of the DIP switch (SW1) on the ADF controller PCB to ON, and place an A4 or LTR white copy paper on the original tray. ON 1 2 SW1 Figure 11-255 7) Press the push switch (PSW) on the ADF controller PCB. • The copy paper will be picked up from the original tray and stopped on the copyboard glass. F012 A ON 2 789 1 3456 B CDE PSW Figure 11-256 COPYRIGHT © 1999 CANON INC.
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CHAPTER 11 TROUBLESHOOTING 8) Use the rotary switch (SW2) on the ADF controller PCB to adjust the original leading edge stop position. Moving the rotary switch by a single notch changes the original stop position by about 0.3 mm. Press the push switch (PSW) after deciding on a position to discharge the copy paper and store the optimum value.
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CHAPTER 11 TROUBLESHOOTING F012 A ON 789 1 2 3456 B CDE Example: If L4 is 13 mm, You must shift the original stop position toward the leading edge by 3 mm. 1) Place a sheet of A4 or LTR white copy paper on the original tray. 2) Shift bit 1 of the DIP switch (SW1) on the ADF controller PCB to ON; then, push the push switch (PSW) to pick up the copy paper.
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CHAPTER 11 TROUBLESHOOTING 4) Press the push switch (PSW) on the ADF controller PCB. • The copy paper on the copyboard will be discharged, and the optimum value will be stored. F012 A ON 2 789 1 3456 B CDE PSW Figure 11-260 11-40 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING C. 1. Electrical After Replacing the Major Parts Scanning lamp Parts Work 1. Scanning lamp intensity adjustment (LAMP_ADJ) 2. AE adjustment AE sensor PCB 1. AE adjustment Composite power supply PCB*1 (1. Scanning lamp intensity adjustment (LAMP_ADJ)) (2. AE adjustment) 3. Voltage correction for APVC measurement (PW_OFST) 4. Current correction for APVC measurement (IP_ADJ) Pre-exposure lamp 1. Pre-exposure lamp output adjustment (PREX_LP) DC controller PCB 1.
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CHAPTER 11 TROUBLESHOOTING 2. Adjusting the Intensity of the Scanning Lamp You must perform this adjustment whenever you have replaced any of the following: • DC controller PCB • Composite power supply PCB (See p. 11-41.) • Scanning lamp Caution: If you have performed this adjustment, be sure to perform AE adjustment. 1) 2) 3) 4) Making Adjustments • If you have replaced the DC controller PCB or the composite power supply PCB, Select '38' in service mode. • The display will indicate '38'.
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CHAPTER 11 TROUBLESHOOTING 6) Change the setting using the +/- key until gray scale No. 9 is barely visible by way of adjusting the intensity of the scanning lamp. • The setting may be between 0 and 99. • For each '1', the lamp supply voltage will change about 0.15 V (for 120V model) or about 0.30 V (for 220/240V model). • A higher setting will decrease the intensity of the lamp, thereby making copies darker. • A lower setting will increase the intensity of the lamp, thereby making copies lighter.
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CHAPTER 11 TROUBLESHOOTING 3. AE Adjustment Perform this adjustment if you have replaced any of the following: • DC controller PCB • Composite power supply PCB (See p.11-41) • AE sensor PCB • Scanning lamp Making Adjustments Preparatory Work • Obtain a newspaper which is more or less even in density. (Avoid ones with photos or large text characters.) • Obtain five sheets of white sheets of paper • Make sure that the intensity of the scanning lamp has been adjusted when you have replaced the scanning lamp.
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CHAPTER 11 TROUBLESHOOTING 4) Place a newspaper on the copyboard, and close the copyboard cover. 5) Turn VR102 so that the reading in the display is 'A3' through 'Ad'. VR102 J130 AE REF VR102 J107 J131 J101 AE GAIN J103 J104 Figure 11-263 6) Remove the newspaper from the copyboard, and place five sheets of copy paper on the copyboard glass in its place; then, close the copyboard cover. 7) Turn VR103 on the DC controller PCB so that the reading on the control panel is '52' through '5c'.
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CHAPTER 11 TROUBLESHOOTING 9) Make a copy, and check to make sure that the density of characters is adequate. • If the copy is foggy or its characters are too light, go back to step 1) and start over. • If there is no change after adjustment for a second time, use the density correction dial (VR107). Figure 11-265 11-46 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 4. 1) 2) 3) 4) Primary Charging Output Voltage Correction (PRIMARY) Perform this adjustment whenever you have replaced any of the following: • DC controller PCB • Drum unit Making Adjustments • If you have replaced the DC controller PCB, Select '32' in service mode. • The display will indicate '32'. Press the Copy Start key. • The existing setting will flash. Enter the value of 'PRIMARY' recorded on the service label using the +/- key. Press the AE key to store the new value.
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CHAPTER 11 TROUBLESHOOTING 6. 1) 2) 3) 4) 5) Voltage Correction for Measurement of APVC (PW_OFST) Perform this adjustment if you have replaced any of the following: • DC controller PCB • Composite power supply PCB Making Adjustments Select '34' in service mode. • The display will indicate '34'. Press the Copy Start key. • The existing setting will flash. Enter the value of 'PW_OFST' recorded on the service label using the +/- key. Press the AE key to store the new value.
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CHAPTER 11 TROUBLESHOOTING 7. 1) 2) 3) 4) Current Correction for Measurement of APVC (IP_ADJ) Perform this adjustment whenever you have replaced any of the following parts: • DC controller PCB • Composite power supply PCB Making Adjustments • If you have replaced the DC controller PCB, Select '35' in service mode. • The display will indicate '35'. Press the Copy Start key. • The existing setting will flash. Enter the value of 'IP_ADJ' recorded on the service label using the +/- key.
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CHAPTER 11 TROUBLESHOOTING 8. 1) 2) 3) 4) 9. 1) 2) 3) 4) 5) Ratio Fine Adjustment (LENS_ADJ) Perform this adjustment whenever you have replaced the following: • DC controller PCB Making Adjustments • When you have adjusted the DC controller PCB, Select '36' in service mode. • The display will indicate '36'. Press the Copy Start key. • The existing setting will flash. Enter the value of 'LENS_ADJ' indicated on the service label using the +/- key. Press the AE key to store the new value.
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CHAPTER 11 TROUBLESHOOTING 10. Checking the Photointerrupters 1) Set the meter range to 12 VDC. 2) Connect the - probe [1] of the meter to the grounding terminal [2]. [1] [2] Figure 11-268 3) Make checks as instructed. Reference: The photointerrupers other than those shown in Table 11-209 are connected in a matrix, hence the omission from the table.
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CHAPTER 11 TROUBLESHOOTING III. TROUBLESHOOTING IMAGE FAULTS A. 1. a. b. c. d. e. f. Making Initial Checks Site Environment Check the site against the following considerations: The voltage of the power source is as rated. The site must not be subject to high temperature or humidity (as near a water faucet, water boiler, humidifier) or dust. The machine must not be near a source of fire. The site must not be subject to ammonium gas. The machine must not be exposed to direct rays of the sun.
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CHAPTER 11 TROUBLESHOOTING 8. Others When a machine is brought in from a cold place (e.g., warehouse) to a warm place, condensation can occur inside it, leading to various problems; e.g., a. Condensation on the scanner (glass, lens, mirror, reflecting plate) will cause dark images. b. The drum is likely to be cold (high OPC electrical resistance), not enabling good contrast. c. Condensation in the pickup/feeding assembly tends to cause feeding faults. d.
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B. Sample Image Faults NOTE: The samples are created intentionally. The NA-3 Test Sheet was copied in the direct mode in A3 and printed with a reduction of about 19%; actual images may be somewhat different. * Copies made with the copyboard lifted; faults may also appear on normally made copies. † Strips may vary in width. † 11-56 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING C. 1 2 3 Troubleshooting Image Faults The copy is too light. (halftone area only) The copy is too light. (including solid area) The copy is too light. (enter image, appreciably) Cause Lens, Reflecting plate, AE sensor, Static eliminator Step 1 ------------ 2 Transfer charging roller 3 Copy paper Transfer lower guide, Varistor Checks Clean the lens, reflecting plate, AE sensor, and static eliminator. Is the problem corrected? Action End.
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CHAPTER 11 TROUBLESHOOTING 4 5 The copy has uneven density. (darker at front) The copy has uneven density. (lighter at front) Cause Scanner Step 1 Toner cartridge Scanning lamp Transfer charging roller 2 6 Checks Clean the scanning lamp, reflecting plate, lens, and mirror. Is the problem corrected? Turn off the power in the middle of a copying run, and open the machine. Is the toner image on the photosensitive drum before transfer more or less uneven? YES/NO YES YES NO Action End. 1.
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CHAPTER 11 TROUBLESHOOTING 7 8 9 The copy is foggy vertically. The copy has black lines. (vertical, fuzzy, thick) The copy has black lines. (vertical, fine) Cause Scanner Transfer guide assembly Drum unit Step 1 2 3 Checks Clean the scanning lamp, reflecting plate, lens, and mirror. Is the problem corrected? Clean the transfer guide assembly. Is the problem corrected? YES/NO YES End. Action YES End. Take out and then set the drum unit once again. Is the problem corrected? YES NO End.
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CHAPTER 11 TROUBLESHOOTING 12 The copy has white spots. (horizontal) Cause Copy paper Scanner rail Step 1 Checks Is the paper of a recommended type? YES/NO YES 2 Try paper fresh out of package. Is the problem corrected? YES 3 Is the problem noted at the same position on all copies? YES Scanning lamp, Developing bias NO Action Try a recommend type. If the results are good, ask the user to use a recommended type. The paper may be moist. Instruct the user on the correct method of storing paper.
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CHAPTER 11 TROUBLESHOOTING 14 The copy has a fixing fault. Cause Copy paper Step 1 Checks Is the copy paper of a recommended type? YES/NO NO Fixing film 2 Is the problem vertical and, in addition, in the form of lines? YES Fixing heater 3 Does the heater turn on when the Copy Start key is pressed? NO DC controller PCB, Composite power supply PCB COPYRIGHT © 1999 CANON INC. YES Action Try a recommended type. If the results are good, ask the user to use a recommended type.
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CHAPTER 11 TROUBLESHOOTING 15 The copy has a misplaced leading edge. (extremely excess margin) 16 The copy has a misplaced leading edge. (excess margin) 17 The copy has a misplaced leading edge (no margin) Cause Pickup roller, Pickup clutch, Cassette Sensor (PS1), Lightblocking plate Image leading edge margin Solenoid (SL2), DC controller PCB Copy paper Step 1 2 3 Checks Make copies using the cassette and manually.
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CHAPTER 11 TROUBLESHOOTING 19 The copy has horizontal fogging. Cause Scanning lamp Drum unit, High-voltage transformer assembly Scanning system Feeding system Step 1 Checks Does the scanning lamp flicker? YES/NO YES 2 Replace the drum unit. Is the problem corrected? YES NO 3 Make a reduced copy, and compare it against one made in Direct. Is the problem found at different positions? YES NO Action Replace the scanning lamp. End. Check the highvoltage transformer (composite power supply PCB).
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CHAPTER 11 TROUBLESHOOTING 21 The copy is blank. Cause Toner cartridge Drum drive assembly Step 1 Checks Is toner inside the toner cartridge? YES/NO YES 2 Has the open seal been removed? NO 3 Does the drum drive gear rotate normally? NO Action Replace the toner cartridge. Remove the opening seal. Check the drum drive assembly. Caution: Be sure to install the drum unit before mading checks.
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CHAPTER 11 TROUBLESHOOTING IV. TROUBLESHOOTING MALFUNCTIONS A. 1 Troubleshooting Malfunctions E000 Cause Thermistor (TH1) Step 1 Checks Are the connection of J102 on the DC controller PCB and the wiring to the thermistor (TH1) normal? YES/NO NO Heater, Fuse (FU2) 2 Is there electrical continuity between J207-1 and -2 on the fixing heater side? NO Thermistor (TH1) Composite power supply PCB DC controller PCB 3 Replace the fixing upper unit.
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CHAPTER 11 TROUBLESHOOTING 3 E002, E003 Cause Thermistor (TH1) Step 1 Checks Is the connection of J102 on the DC controller PCB and the wiring to the thermistor (TH1) normal? YES/NO NO Heater, Fuse (FU2) 2 Is there electrical continuity between J207-1 and -2 on the fixing heater side? NO Thermistor (TH1) Composite power supply PCB DC controller PCB 3 Replace the fixing assembly upper unit. Is the problem corrected? Replace the composite power supply PCB.
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CHAPTER 11 TROUBLESHOOTING 5 E030 Cause Wiring Total copy counter DC controller PCB 6 Step 1 2 Checks Is the wiring from the total counter to the connector J119 on the DC controller PCB normal? Replace the total copy counter. Is the problem corrected? YES/NO NO Action Correct the wiring. YES End. NO Replace the DC controller PCB. E064 Cause Wiring Step 1 Checks Turn off and then on the power switch; then, set the copy count to '1'.
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CHAPTER 11 TROUBLESHOOTING 7 The keys on the control panel are locked. ('E202') Cause ------------ Step 1 Scanner home position sensor (PS1) DC controller PCB 8 2 Checks Is the scanner in the home position when 'E202' turns on? Is the scanner home position sensor (PS1) normal? (For instructions on how to check photointerrupers, see p. 11-51.) NO YES Action See "The scanner fails to move forward." Check the wiring from J101 on the DC controller PCB to PS1; if normal, replace PS1.
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CHAPTER 11 TROUBLESHOOTING 11 E261 Cause Power supply frequency Step 1 Checks Turn off and then on the power switch. Is the problem corrected? Composite power supply PCB YES/NO YES NO Action End. However, if 'E261' occurs frequently, advise the user to use a frequency stabilizer. Replace the composite power supply PCB. 12 E400 Step 1 Checks Turn off and then on the power.
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CHAPTER 11 TROUBLESHOOTING 14 AC power fails to turn on. Cause Power plug Step 1 Machine top unit Power supply 2 Fuse (FU501) 4 Fuse (FU102) 5 Door switch (DS1) 6 Noise filter PCB Harness 7 Connector connection 1 3 Checks Is the power plug connected to the power outlet? Is the machine's top unit closed firmly? Is the rated voltage present at the power outlet? YES/NO NO NO NO Is the fuse (FU501) on the noise filter PCB blown? 120V model: 250 V, 15 A 220/240V model: 250 V, 6.
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CHAPTER 11 TROUBLESHOOTING 15 DC power fails to turn on. Cause AC power supply Step 1 Wiring, DC load 2 Checks Is AC power present between J201and -2 on the composite power supply PCB? Turn off the power switch, and disconnect J202 and J205 from the composite power supply PCB. Set the meter range to 30 VDC, and turn on the power switch.
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CHAPTER 11 TROUBLESHOOTING 16 Pickup fails. (cassette) Cause Main motor (M1) Cassette Step 1 2 Checks Does the main motor (M1) rotate when the Copy Start key is pressed? Is the cassette set correctly? YES/NO NO NO Paper in cassette 3 Is the paper in the cassette placed correctly? NO Pickup clutch solenoid (SL1), Cassette pickup solenoid (SL5) 4 Set the meter range to 30 VDC, and connect the meter probes to the following terminals.
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CHAPTER 11 TROUBLESHOOTING 18 The scanner fails to move forward. Cause Cable Step 1 Scanner path 2 Composite power supply PCB 3 Pre-registration roller paper sensor (Q751) 4 Scanner/lens drive motor (M2) DC controller PCB 5 Checks Is the scanner drive cable routed correctly? Is the scanner rail soiled? Move the scanner by hand. Does it move smoothly? YES/NO NO NO Set the meter range to 30 VDC, and connect the meter probes to J202-2 (+) and -1 (-) on the composite power supply PCB.
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CHAPTER 11 TROUBLESHOOTING 20 The blanking lamp fails to turn on. Cause Side blanking PCB Step 1 DC controller PCB Checks Remove J106 from the DC control PCB, and set the meter range to 1 kΩ; then, connect the meter probes to J106-1 and -2 on the harness side. Is the meter reading about 20 Ω? YES/NO NO YES Action Check the harness; if normal, replace the side blanking PCB. Replace the DC controller PCB. 21 The pre-exposure lamp fails to turn on.
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CHAPTER 11 TROUBLESHOOTING 23 The lens fails to turn on. Cause Lens solenoid (SL3) Step 1 Checks Does the lens solenoid (SL3) turn on when the power switch is turned on? YES/NO NO Lens cable, Pulley, Rail 2 Are the lens cable, pulley, and rail normal? NO DC power supply 3 NO Scanner/lens drive motor (M2) DC control PCB 4 Set the meter range to the 30 VDC, and connect J202-2 (+) and -1 (-) on the composite power supply PCB.
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CHAPTER 11 TROUBLESHOOTING 25 The "Add Paper" message fails to turn off. Cause Cassette Step 1 DC power supply 2 Vertical path roller paper sensor (PS4) 3 Control panel PCB DC controller PCB 4 Checks Is the cassette set correctly? YES/NO NO Set the meter range to 30 VDC, and connect the meter probes to J202-2 (+) and -1 (-) on the composite power PCB.
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CHAPTER 11 TROUBLESHOOTING V. TROUBLESHOOTING FEEDING PROBLEMS A. Copy Paper Jam Inside the machine, jams tend occur in the following blocks: [1] Pickup block [2] Separation/feeding block [3] Fixing/delivery block The troubleshooting procedures that follow are organized according to the location of a jam. [3] [2] [1] Figure 11-501 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING 1 Pickup Assembly Cause ------------ Cassette 2 Checks Does the problem occur when the cassette is selected as the source of paper? Is the cassette set correctly? Copy paper 3 Is the copy paper curled or wavy? YES Copy paper 4 YES DC controller PCB, Pickup clutch Registration roller drive assembly Vertical path roller paper sensor (PS4) Pickup roller, Vertical path roller,Roll 5 Try paper recommended by Canon.
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CHAPTER 11 TROUBLESHOOTING 2 Separation/Feeding Assembly Cause Copy paper Step 1 2 Checks Try paper recommended by Canon.
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CHAPTER 11 TROUBLESHOOTING B. 1 Faulty Feeding Double-Feeding Cause Cassette Step 1 2 3 Copy paper 4 Checks Is the copy paper placed under the claw properly? Push down the copy paper inside the cassette. Does it move up when let go with its end coming under the claw? YES/NO NO Is the sheets of paper placed in the cassette uneven? Is the paper of a type recommended by Canon? YES Claw (cassette) 2 NO NO YES Action Place the copy paper properly. 1. Check the copy paper width. 2.
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CHAPTER 11 TROUBLESHOOTING VI. ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS A. Sensors and Solenoids SL3 PS2 PS5 SL2 SL4 SL1 SL6 SL5 PS4 PS1 Q751 CNT1 PS3 Figure 11-601 Symbol Name Photointerrupters PS Notation PS1 PS2 PS3 PS4 PS5 Q751 CNT Counter CNT1 Solenoid SL1 SL2 SL3 SL4 SL5 SL6 SL COPYRIGHT © 1999 CANON INC.
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CHAPTER 11 TROUBLESHOOTING B. Switches SW309 DS1 Figure 11-602 Symbol 11-82 Name Switch COPYRIGHT © 1999 CANON INC. Notation DS1 SW309 Description Door switch Power switch Remarks CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING C. Lamp, Heater, Motor, Etc.
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CHAPTER 11 TROUBLESHOOTING D. PCBs [9] [10] [3] [8] [5] [4] [2] [1] [6] [7] Figure 11-604 Ref. [1] [2] [3] Name Noise filter PCB DC controller PCB Composite power supply PCB [4] High-voltage contact PCB [5] [6] [7] [8] [9] [10] Control panel PCB Sensor PCB AE sensor PCB Blanking PCB (front) Blanking PCB (rear) Pre-exposure PCB 11-84 COPYRIGHT © 1999 CANON INC. Description Removes noise from the power supply. Controls sequence of operations.
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CHAPTER 11 TROUBLESHOOTING E. ADF M2 M1 [1] PI3 PI2 MS1 PI1 Figure 11-605 Symbol Name Photointerrupter Notation PI1 PI2 PI3 Description Delivery paper detection Resistration roller paper detection Original placement detection Microswitch MS1 ADF open/close switch Motor M1 M2 Belt motor Pickup motor PS M [1] ADF controller PCB COPYRIGHT © 1999 CANON INC. Remarks Controls sequence of operations CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING F. Variable Resistors (VR) and Check Pins by PCB Of the variable resistors (VR) and check pins, those needed in the field are discussed herein. Those not found in the discussions are for the factory only, requiring special tools and adjustment to an extremely accuracy. Do not touch them in the field. Caution: VRs that may be used in the field ................ VRs that must not be used in the field .........
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CHAPTER 11 TROUBLESHOOTING 3. ADF Controller PCB FACE Soldered side 7 1 10 TP1 1 J3 J5 1 9 1 J2 8 4 J1 1 CB1 2 1 J6 ON 1 2 PSW SW1 SW2 Figure 11-608 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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CHAPTER 11 TROUBLESHOOTING VII.SERVICE MODE A. Outline The machine's service mode is divided into the following four types: Notation 30 40 50 60 Item Adjustment mode Operation/inspection mode Machine settings mode Counter mode Table 11-701 B. Using Service Mode 1. Starting Service Mode 1) Open the machine's top unit, and remove the two screws [1]; then, detach the front upper cover [2]. [1] [2] [1] Figure 11-701 Caution: A flexible cable for the control panel is connected to the front upper cover.
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CHAPTER 11 TROUBLESHOOTING JP104 2) Close the machine's top unit, and connect the flexible cable from the control to the DC controller PCB; then, turn on the power switch. 3) Short JP103 and JP104 on the DC controller PCB with a screwdriver. • The display will indicate 'F'. SERVICE JP103 JP104 Figure 11-702 4) While the display indicates 'F', stop shorting JP103 and JP104. 2. Ending Service Mode 1) Press the Clear/Stop key. 3.
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CHAPTER 11 TROUBLESHOOTING Clearing the Error Code from Memory If 'E000', 'E001', 'E002', or 'E003' is indicated, remove the cause of the error, and clear the memory. 1) Turn on the power while shorting JP103 and JP104 on the DC controller PCB with a screwdriver. • The display will indicate 'F'. JP104 4. SERVICE JP103 JP104 Figure 11-703 2) Turn off and then on the power switch to check the copying operation.
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CHAPTER 11 TROUBLESHOOTING C. Adjustment Mode (30) 1) Press the +/- key to select an item, and press the Copy Start key. • The existing setting of the item will flash. 2) Press the +/- key to change the settings. 3) Press the AE key to store the new setting. • The setting will stop flashing and remain on. • A press on the Copy Start key will start copying operation. 4) As necessary, press the Clear/Stop key to return to item selection.
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CHAPTER 11 TROUBLESHOOTING D. Operation/Inspection Mode (40) 1) Select an appropriate item using the +/- key; then, press the Copy Start key to execute it. • The item is flashed. • If the mode is designed to stop automatically, item selection will automatically return at the end. • As necessary, press the Clear/Stop key to return item selection. Notation 40 Item AE adjustment mode 41 Toner supply mode 42 Back-up RAM clear Description The main motor rotates, and the scanner moves forward.
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CHAPTER 11 TROUBLESHOOTING E. Machine Settings Mode (50) 1) Press the +/- key to select an item, and press the Copy Start key. • The setting will flash. 2) Press the +/- key to change the setting. 3) Press the AE key to store the new setting. • The setting will stop flashing, and remain on. 4) As necessary, press the Clear/Stop key to return to item selection. Notation 50 51 Item Copy count upper limit setting Density adjustment mode at power-on Description The upper limit may be between 1 and 100.
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CHAPTER 11 TROUBLESHOOTING VIII. SELF DIAGNOSIS The microprocessor on the machine's DC controller PCB is equipped with a self diagnostic mechanism that checks the condition of the machine (particularly, sensors) and indicates an error code in the count/ratio indicator on the control panel upon detection of a fault. In the case of 'E001', 'E0' and '01' are flashed alternately. Code • • • • • Cause The thermistor (TH1) is faulty. The fixing heater (H1) is faulty. The thermal fuse (FU2) has blown.
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CHAPTER 11 TROUBLESHOOTING Code ( Cause • The composite power supply PCB is faulty. • The DC controller PCB is faulty. ) The keys on the control panel are locked with error code indication. • The scanner home position sensor (PS1) is faulty. • The scanner/lens drive motor (M2) is faulty. • The DC controller PCB is faulty. • The lens home position sensor (PS2) is faulty. • The scanner/lens drive motor (M2) is faulty. • The lens cable is faulty. • The DC controller PCB is faulty.
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CHAPTER 11 TROUBLESHOOTING JP104 Caution: 1. If the self-diagnosis has turned on, turn off the power switch to reset the machine. In the case of 'E000', 'E001', 'E002', or 'E003', however, the machine must be reset as follows: this consideration is to prevent feeding power to the fixing heater otherwise occurring if the thermistor has an open circuit: 2. In the case of 'E000', 'E001', 'E002', 'E003', or 'E220', the machine will turn off in 1.5 sec for 'E000' through 'E003' and in 2 sec for 'E220'. 3.
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APPENDIX A. GENERAL TIMING CHART ........ A-1 B. SIGNALS AND ABBREVIATIONS ....................... A-3 C. GENERAL CIRCUIT DIAGRAM . A-5 D. DC CONTROLLER CIRCUIT DIAGRAM ................................... A-7 E. ADF CONTROLLER CIRCUIT DIAGRAM ................................. A-15 F. COMPOSITE POWER SUPPLY CIRCUIT DIAGRAM .................. A-19 G. CONTROL PANEL CIRCUIT DIAGRAM ................................. A-29 H. AE SENSOR CIRCUIT DIAGRAM .................................
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A. GENERAL TIMING CHART 1.
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2.
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B. SIGNALS AND ABBREVIATIONS What follows below is a list of signals and abbreviations used in the chapters of the manual and circuit diagrams. The abbreviations within parentheses represent analog signals, which cannot be expressed in terms of ‘1’ or ‘0’. 1.
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C. GENERAL CIRCUIT DIAGRAM MAIN MOTOR DRIVER PCB Fixing heater H1 J16 1 2 Thermal fuse 1 Scanning lamp 220/240 V J901 LA1 FU1 J17 1 2 3 4 FT6 J434 Line filter H FT2 FT4 N FT1 FT3 J501 2 1 2 1 J15 FT5 FU2 NF1 NOISE FILTER PCB P1 FT2 FT1 Dev. antenna Thermal fuse 2 120 V N M 1 1 2 2 LF1 DS1 Door switch H J2 3 2 J954 1 J952 M1 +24VU GND MMD MLOCK J1 J502 Main motor DEV_BIAS P1 1.
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2.
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D.
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DC Controller Circuit Diagram (2/8) +5V +5V R115 SC_I_SEL3 R277 Q165 R114 R117 SC_I_SEL1 Q112 SC_I_SEL2 3 R113 R112 R267 2 Q109 OUTB INB 18 INB* 17 GB 16 REFB 15 TdB 14 VSB 13 OUTB* 12 RSB 11 RSA 10 OUTA 9 VSA 8 INA 7 INA* 6 GA 5 REFA 4 TdA 3 1 +24VU 2 OUTA* Q155 1 R399 SC_COM SC_B SC_B* SC_A SC_A* +5V R227 R226 R225 C264 C265 C266 C107 C106 C166 C165 C164 C163 R224 SC_INB* SC_INB SC_INA* SC_INA C263 +5V +5V R111 R109 R107 C109 A-8 R108 C108
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DC Controller Circuit Diagram (3/8) VR103 1 3 R121 2 C155 +24VR R265 +5V +24VR C111 6 4 R266 7 5 AE R120 9 AEREF 4 8 10 2 C185 ZD101 2 +5V 1 VR102 AE_DATA 11 Q106 3 11 Q106 R206 1 R119 C184 R264 R118 C186 R263 R309 +24VU +24VR R306 2 R307 + C207 3 C203 4 +24VR 1 13 R310 24V_SENSE 4 14 12 11 Q106 11 ZD102 Q106 C205 R305 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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DC Controller Circuit Diagram (4/8) KEY<7..0> 8 8 0 R134 0 KR0 1 R133 1 KR1 2 2 R132 2 KR2 3 3 R131 3 KR3 4 R130 4 KR4 5 R129 5 KR5 6 R128 6 KR6 1 D102 1 D113 1 D218 1 D108 2 3 2 HEAT0 2 HEAT1 2 SERVICE 2 DPD 5 TNFULL D193 7 7 R127 KR7 +5V C169 R229 C170 R230 C171 R231 C172 R232 C173 R233 C174 R234 C175 R235 C168 R228 D207 Q176 DIG0 7 1 D195 D208 2 TNMONI R288 DIGIT<4..
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DC Controller Circuit Diagram (5/8) R271 ZER_CRS_LEVEL +5V 1 R150 ZER_CRS 2 8 1 D183 R149 C181 3 +5V Q153 +5V R154 4 Q107 2 3 C126 IN B VDD R158 5 VSS OUT X ZER_CRS_EDGE C167 IN A 2 4 3 R275 Q131 1 C183 R148 +5V +24VU +5V 1 D204 2 D189 Q181 2 3 1 COPYRIGHT © 1999 CANON INC. ZD103 2 1 2 3 T_CNT_ERR Q162 1 CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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DC Controller Circuit Diagram (6/8) +5V +24VU 1 D205 R313 R361 R181 R165 3 2 M_TH LNSLD* 1 Q145 1 SLC_SL 2 D124 3 2 1 Q144 PUSLD* 1 FD_SL R162 2 D127 R161 3 2 1 Q143 RGSLD* 1 RG_SL 2 D126 MLT_SL FAN R352 PU_SL R353 SB_ON R160 3 2 D125 R166 2 0 R173 1 R174 TH2 2 R175 AE_DATA 3 R176 DSVR 4 R177 AEDS_VR 5 R207 24V_SENSE 6 R178 7 R179 TH1 MFSLD* 1 Q142 AD<7..
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DC Controller Circuit Diagram (7/8) +5V +5V +5V R196 POWER_OFF* R189 RLOFF* D184 6 HEAT_ERR* 3 Q146 C143 8 7 2 5 1 + 4 Q107 +5V COMP_CLR Q158 R188 +2 R193 2 C142 1 R191 1 D128 R192 D185 +5V +5V TH1 3 + C176 8 1 1 3 2 4 +5V Q147 Q108 R186 2 Q148 1 HEAT_TRG R190 +5V Q151 R212 R214 C160 Q160 R187 3 2 HEAT_OFF C161 2 1 D132 HEAT_PWM 2 1 D133 +5V 5 + 8 7 6 4 Q108 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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DC Controller Circuit Diagram (8/8) +24VR +24VU +5V +5V +5V 1 J101 2 J101 HEAT0 J102 3 DIG1 J102 4 HEAT1 J102 5 J102 C261 6 C253 R197 J102 C146 C151 C145 C149 7 8 DPD 9 C152 C147 C201 TNMONI 1 STBY/CPY* 2 DV_AC_ON J103 3 DV_DC_ON J103 4 PR_DC_ON J103 5 CPS_REQ J103 6 MMD J103 7 ACK* J103 8 RLOFF* J103 9 J103 J102 ACK 1 J102 J130 C255 J102 TXD 2 J130 TH2 1 RXD 2 1 J131 J131 HEAT_TRG 2 2 J108 J104 3 J108 S_OUT J104 5 S_IN J104
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E.
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ADF Controller Circuit Diagram (2/3) TP1 4 B* TP1 1 A TP1 +24V 1 TP1 3 B NC TP1 5 TP1 Q4 MB 2 MA 5 MA* 3 MB* 4 J3 J3 DM0 J3 6 TP1 J3 J3 DM1 +5V 7 VCC NC 3 1 OUT1 IN1 2 5 IN2 OUT2 R10 +5V R8 C13 +24V R9 R14 1 3 5 7 9 11 13 15 17 OUTA* VrefA INA* VSA RSA OUTB* TdB GND INB TdA GND INA OUTA RSB VSS VrefB INB* OUTB 2 4 6 8 10 12 14 16 18 OUTA OUTA* 7 6 J3 J3 GND 4 10 R12 +24V TP1 7 6 2 A* Q5 C11 +24V C14 +5V R16 R15 1 +5V J7 R11 Q8 LED 2 J7 C12 R13 A-16
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ADF Controller Circuit Diagram (3/3) +5V +5V R19 R41 PDP3 9 C16 +5V 8 R20 7 J5 D2 HC14 REQ 2 J5 R30 C19 +5V J5 Q9 6 +5V 8 6 5 R22 4 5 J5 D3 +5V J5 HC14 RXD 4 R35 3 R34 4 C20 Q6 +5V J5 3 R36 Q10 TP1 R23 3 C18 2 TXD 9 +5V 2 R24 1 1 J5 J5 +5V J5 R37 +5V DIPSW1 DIPSW0 2 1 R25 R26 R27 R28 3 4 HC14 6 Q6 HC14 SW1 8 R39 Q6 HC14 SW3 10 DIGIT2 Q6 HC14 DIGIT3 12 COPYRIGHT © 1999 CANON INC.
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F.
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Composite Power Supply Circuit Diagram (2/9) [A503] AC_H_AF TH102 Q105 + C101 C151 C157 FU102 FB104 R644 TH101 D543 C102 C156 L103 To radiation plate +5V AC_N_AF T101 +5V + MPWM AC_HA 6 14 LOW_GU 7 13 12 LOW_G 24VON D542 R104 C588 R116 16 15 24VOFF 3 Q113 R105 D111 R106 MPWM_INV HV_H 5 R184 11 HV_L 10 MV_H 9 MV_L 1 D106 AC_LA 2 NC=8 R109 D121 + D124 3 2 4 C10
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Composite Power Supply Circuit Diagram (3/9) [A504] To DC controller PCB 1 J214 2 3 1 J202 2 3 4 5 6 1 L181 R118 DC24V_S C116 C115 C141 D180 D103 Q180 Cd 8 R181 7 Es Si 3 Ct 4 GND 6 V+ 5 INV +5V +5V D132 + R180 C182 C181 Cs +24VR C184 + T101 FB180 + 2 L180 TNMONI R182 +5V C183 +5V C180 +5V R119 R129 D117 C137 R124 +24VR R122 5 +5V FB101 16 +5V D104 R154 D129 R158 R157 + 3 2 C132 C118 C152 4 R115 C133 7 8 Q117 ZD103 +5V Q108
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Composite Power Supply Circuit Diagram (4/9) [A505] R209 R203 C201 R205 MV_H R202 D205 D201 D202 R206 10 9 PDC_S JP202 C204 C209 C203 MV_L T101 C206 R201 C514 C202 C513 PRIMARY J209 R211 JP887 PDC_PWM Q201 R215 P_C_S C207 R216 A-22 R521 C222 R212 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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Composite Power Supply Circuit Diagram (5/9) [A506] J215 J212 DEVELOPING C210 C212 C214 D211 R225 C211 D210 D209 D208 D207 D206 J213 SEPARATION R254 C213 T101 12 HV_H R210 C220 R237 HV_L R236 3 1 4 2 C221 + R238 ACBIAS +5V 11 R207 D214 BIAS_PWM R208 JP201 R239 C218 Q206 C219 C208 R243 BIAS_S D215 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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Composite Power Supply Circuit Diagram (6/9) [A507] R361 R327 VR301 D306 T_FEEDBACK C359 C377 R318 +24VR T302 5 R336 T_FW_DRV J210 Transfer output 1 Q310 D308 6 R338 7 2 R337 D307 Q308 R332 R330 R329 7 R328 C318 C312 + +24VR T_FW_ON R390 CLK32K R317 Q325 HV_LIMIT R392 ZD303 Q311 R393 C317 R326 T_FW_S JP301 C346 R351 R352 R353 R354 R355 R356 C345 D344 D343 D342 D341 D339 D340 C381 T_REV C343 D326 D325 11 C379
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Composite Power Supply Circuit Diagram (7/9) [A508] +24VU NC +5V Q901 +5V 2 IN OUT 3 GND C903 1 NC NC R802 +5V AC_MONITOR +24R DC24V_S T_FEEDBACK BIAS_S PDC_S CLIMIT PROTECT TIM T_REV_ON* T_FW_DRV T_FW_S 3 PW_OFF* HV_LIMIT 4 RESET* 5 MODE1 6 MODE2 7 J_CTL 8 45 T_FW_ON ACK* CLK32K 19 PDC_S 20 CLIMIT 37 MPWM PDC_PWM BIAS_PWM +24V 21 PROTECT 22 ACBIAS SKGND TIM 23 T_REV_ON* 24 41 40 XO MPWM_CLK 17 T_FEE
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Composite Power Supply Circuit Diagram (8/9) [A509] R027 R018 R021 Q012 D004 3 2 4 1 C003 ZD001 PWM_1KHz R063 C002 R030 D003 D006 + R029 + LAMP_ON Q003 R009 D005 R026 R003 VR001 R007 R023 R011 R028 R019 1 4 3 R004 + 2 R020 R008 C001 R013 R005 R012 R006 HIC001 9 +5V C004 1 2 J910 3 C008 8 7 6 5 4 3 1 AC_HA 2 D007 R022 R002 4 1 D002 2 6 AC_LA 3 SQ001 Q002 L001 Q0001 R025 R016 D010 D009 Q001 1 4 D011 2 3 R001
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Composite Power Supply Circuit Diagram (9/9) [A510] J954 1 J954 2 +24V J954 3 J951 1 +24V D962 J951 2 GND R970 D963 2 3 VR951 3 2 Q954 1 1 3 D961 2 +24V +24V +24V +24V Q955 1 R962 R964 Q953 R967 R966 6 R959 R960 8 7 + R965 C955 C963 2 R969 8 5 1 4 + 3 C956 C957 Q953 4 R961 J952 1 DEV_BIAS +24V ADJ- 3 ADJ+ 2 D952 C951 R951 1 D953 3 2 J953 J953 J953 Q951 1 3 D951 2 Q952 1 C964 R952 C952 R954 3 VR952 + 1 COPYRIGHT © 1999 CANON INC.
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G.
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APPENDIX H. AE SENSOR CIRCUIT DIAGRAM +24VR R601 R603 J601-1 C603 R606 C601 +24VR 2 8 1 3 PD601 + J601-2 R605 4 Q601 R602 +24VR 8 6 Q601 4 + 5 7 J601-3 R604 C602 J601-4 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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APPENDIX K. HIGH VOLTAGE CONTACT CIRCUIT DIAGRAM 1 JP701 1 PR 2 BP701 2 JP702 1 JP703 1 R704 2 SP BP702 2 JP704 1 JP705 1 DV 2 BP703 2 JP706 1 JP707 1 R701 2 TR BP704 2 JP708 1 JP709 1 2 2 R702 1 [PR_IN] BP705 2 JP710 1 JP711 1 [GND_IN] 2 BP706 2 JP712 1 JP713 1 2 2 R703 1 [DV_IN] BP707 2 JP714 A-34 COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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APPENDIX O. SPECIAL TOOLS You will need the following special tool(s) in addition to the standard tools set when servicing the machine. No 1 Tool Mirror positioning tool (pair for front and rear) Tool No. FY9-3009 2 Wire clip 3 Spring gauge Shape Rank* B Remarks For adjusting the distance between the No.1 and No.2 mirrors. FY9-3017 B For fixing the scanner wire in place while adjusting its tension.
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APPENDIX P. SOLVENTS/OILS No. 1 Name Alcohol Uses Cleaning: e.g., glass, plastic, rubber parts; external covers Composition Hydrocarbon (fluorine family) Alcohol Surface active agent 2 Solvent 3 Lubricating oil 4 Lubricating oil Cleaning: e.g., metal; oil or toner dirt Lubricating spring clutch Lubricating drive and friction parts, scanner rail Hydrocarbon (fluorine/chlorine family) Alcohol Mineral oil (paraffin family) Silicone oil COPYRIGHT © 1999 CANON INC. Remarks • Do not bring near fire.
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Prepared by Office Imaging Products Technical Support Division CANON INC. Printed in Japan REVISION 0 (AUG. 1999) (30359/10317) 5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501 Japan COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG.
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This pubication is printed on 70% reprocessed paper. PRINTED IN JAPAN (IMPRIME AU JAPON) 0899AB1.