User Guide

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1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

REVISION 0

FY8-13G5-000

APR. 1999

Summary of content (248 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 contains basic data and figures for the Stapler Sorter-J1/K1/E3 needed to service the machine in the field. General Description introduces the copier's features and specifications, shows how to operate the copier, and explains how copies are made. Chapter 2 Basic Operation provides outlines of the copier's various operational workings. Chapter 3 Exposure System discusses the principles of operation used for the copier's lens drive unit and scanner drive unit.
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CONTENTS CHAPTER 1 GENERAL DESCRIPTION I. II. FEATURES ..................................1-1 SPECIFICATIONS .......................1-2 A. Type .......................................1-2 B. System ..................................1-2 C. Performance ..........................1-2 D. Others....................................1-3 III. NAMES OF PARTS ......................1-5 A. External View ........................1-5 B. Cross Section .......................1-6 IV. OPERATION ................................
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CHAPTER 4 IMAGE FORMATION SYSTEM I. PROCESSES ...............................4-1 A. Outline ...................................4-1 B. Basic Operation of Image Formation System (black developing assembly, 2 copies) ................................4-2 II. CONTROLLING THE SCANNING LAMP ...........................................4-3 A. Outline ...................................4-3 B. Mechanism ............................4-4 III. PRIMARY/TRANSFER CORONA CURRENT AND GRID BIAS VOLTAGE CONTROL SYSTEM ...........
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CHAPTER 6 FIXING SYSTEM I. BASIC OPERATIONS ..................6-1 A. Outline ...................................6-1 B. Operation of Fixing Assembly Temperature Control System ..................................6-3 III. DISASSEMBLY AND ASSEMBLY ..................................6-4 A. Fixing Assembly ....................6-4 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS I. II. POWER SUPPLY .........................7-1 A. AC Driver DC Power Supply ...................................7-1 DISASSEMBLY AND ASSEMBLY .
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CHAPTER 10 TROUBLESHOOTING I. MAINTENANCE AND INSPECTION ............................ 10-1 A. Basic Image Adjustment Procedure ........................... 10-1 B. Points to Check for Periodic Maintenance ....................... 10-2 II. STANDARDS AND ADJUSTMENT .......................... 10-3 A. Mechanical ......................... 10-3 B. Electrical ........................... 10-17 III. IMAGE TROUBLESHOOTING ............ 10-21 A. Initial Check ...................... 10-21 B. Samples of Image Faults .....
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CHAPTER 1 GENERAL DESCRIPTION I. II. FEATURES ..................................1-1 SPECIFICATIONS .......................1-2 A. Type .......................................1-2 B. System ..................................1-2 C. Performance ..........................1-2 D. Others....................................1-3 III. NAMES OF PARTS ......................1-5 A. External View ........................1-5 COPYRIGHT © 1999 CANON INC. B. Cross Section .......................1-6 IV. OPERATION ............
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CHAPTER 1 GENERAL DESCRIPTION I. FEATURES 1. Copies as large as A3 in size (DIRECT) may be made, and the copyboard is of a fixed type. • Although compact in design, the copier enables making copies as large as A3 in size in the DIRECT mode. • The copyboard is of a fixed type so that pages of a book may be copied with much ease. 2. Zooming between 50% and 200%. • Copies may be made in reproduction rations of between 50% and 200%, selectable in 1% increments. 3. Front loading for faster supply of paper.
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CHAPTER 1 GENERAL DESCRIPTION II. SPECIFICATIONS A. Type Body Copyboard Light sourse Lens Photosensitive medium B. Desktop Fixed Halogen lamp Single lens + mirror movement OPC System Indirect electrostatic method Corona Slit (moving light source) Auto or manual Dry Exclusive cassette Multifeeder Corona Curvature and Static eliminator Blade Heat roller (900W) Reproduction Charging Exposure Copy density adjustment Development Pick-up Automatic Manual Transfer Separation Drum cleaning Fixing C.
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CHAPTER 1 GENERAL DESCRIPTION Two-sided copying Overlay copying Cassette Copy tray Non-image width (1st side) Auto clear Auto shutoff Option D. Multifeed tray Plain paper (64 to 128 g/m2), Colored paper Multifeed tray Plain paper (64 to 128 g/m2), Colored paper Claw Standard Universal Provided 60 mm deep (about 500 sheets of 80 g/m2 paper) Yes 100 sheets (approx.; A4, 80 g/m2) 2.0 ±1.5 mm or less 2.5 ±1.
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CHAPTER 1 GENERAL DESCRIPTION Reproduction mode DIRECT REDUCE ENLARGE 1-4 I II I II Paper size A3 (297x420mm) A4 (210x297mm) B4 (257x365mm) B5 (182x257mm) A5R (210x149mm) 50% A3 → A4 A4 → A3 200% COPYRIGHT © 1999 CANON INC. Cassette A3 A4 B4 B5 A5R Copies/min 9 17 10 17 16 A4R A3 10 9 CANON NP6317 REV.0 APR.
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CHAPTER 1 GENERAL DESCRIPTION III. NAMES OF PARTS A.
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CHAPTER 1 GENERAL DESCRIPTION B. Cross Section [1] [1] [2] [3] [4] [5] [6] [7] [8] [9] [2] [3] [4] [5] [6] [7] [8] [9] [10] [24] [23] [22] [21] [20] [19] [18] [17] [16] [15] [19] [20] [21] [22] [23] [24] Photosensitive drum Cassette Feeder assembly Exhaust fan Fixing assembly Delivery roller No. 3 mirror No. 2 mirror No. 1 mirror Scanning lamp Copyboard glass Copyboard cover Lens Pre-exposure lamp Primary corona assembly [10] [11] [12] [13] [14] [15] [16] [17] [18] No.
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CHAPTER 1 GENERAL DESCRIPTION IV. OPERATION A. Control Panel [1] [22] [2] [21] [20] [19] [18] [3] [4][5] [6] [7] [17] [16] [15] [14] [8] [13] [9] [12] [10] [11] Figure 1-401 1-8 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 1 GENERAL DESCRIPTION No. Name [1] Sort/Group key [2] [3] [4] [5] Two-Page Separation key Paper Jam indicator Control Card Check indicator Paper Out indicator [6] Toner Out indicator [7] Copy quantity/Copy ratio display [8] [9] [10] [11] [12] [13] [14] Reset key Start key Stop key Clear key Number keys Percent key Zoom keys [15] Autom.
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CHAPTER 1 GENERAL DESCRIPTION B. Daily Inspection to Be Performed by the User Carefully instruct the user to be sure to clean the following parts of the copier once a week. 1. Primary Corona Assembly Slide in and out the wire cleaner to clean the corona wires. 2. Copyboard Glass Clean the copyboard glass with a moist cloth; then, wipe it dry. 3. Copyboard Cover Clean the copyboard cover with a mild detergent solution; then, wipe it dry. 4.
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CHAPTER 1 GENERAL DESCRIPTION V. IMAGE FORMATION A. Outline Copyboard glass Scanning lamp Lens Developing assembly Primary corona assembly Pre-exposure lamp Cleaning roller Drum cleaner Picture to be changed (1 register station only) + + + + + + + + + Upper fixing roller + + + Transfer corona assembly + + Static charge eliminator + Upper fixing roller Figure 1-501 This copier consists of the units shown in Figure 1-501.
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CHAPTER 2 BASIC OPERATION In outline diagrams, represents mechanical drive paths, and indicates electrical signal paths. Signals in digital circuits are identified as ‘1’ for High and ‘0’ for Low. The voltage of signals, however, depends on the circuit. Nearly all operations of the product are controlled by a microprocessor; the internal workings of the processor are not relevant to the serviceman’s work and, therefore, are left out of the discussions.
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CHAPTER 2 BASIC OPERATION I. BASIC OPERATION A. Functions The copier can be divided into four functional sections: paper pick-up and feed system, exposure system, image formation system, and control system.
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CHAPTER 2 BASIC OPERATION B. Outline of Electric Circuitry The NP-6317's main mechanisms are controlled by the microprocessor, PROM, and EEPROM on the DC controller PCB. 1. Microprocessor (Q300) • controls the copying sequence • controls the control panel • controls the main motor/scanner motor/mirror motor • controls the scanning lamp/fuser lamp • reads the analog signals 2. PROM (Q301) • contains the sequence program 3.
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CHAPTER 2 BASIC OPERATION DC controller PCB Main motor AC driver/DC power supply PCB Scanner home position sensor Fixing roller heater Lens home position sendor Cassette paper sensor Microprocenssor (Q300) Delivery paper sensor Pre-registration paper sensor HVT Primary/Transfer corona assembly Multifeeder paper densor Mirror home position sensor Developing bias PROM (Q301) EEPROM (Q317) GND bias Registration roller clutch Lens solenoid Pick-up clutch sole
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CHAPTER 2 BASIC OPERATION C. 1.
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CHAPTER 2 BASIC OPERATION 2. Inputs to DC Controller (2/2) DC controller PCB AE 24V J701-4 J312-13 -2 -11 -1 -10 -3 -12 J39-3 J303-3 -2 -2 -1 -1 J45-1 J317-1 -2 -2 -4 J317-4 -3 -3 J28-3 J313-2 -4 -3 -5 -4 -6 -5 -2 -1 24V + AE sensor AE See p. 3-25 AEGIN TS1 5V BTEP Black toner leveol sensor Thermistor 2 (auxiliary) TH2 (NTC2) TH2 TH1(NTC1) Thermistor 1 (main) TH1 The voltage lowers as the fixing heater temperature rises.
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CHAPTER 2 BASIC OPERATION D. 1. DC Controller Outputs DC Controller Out Puts (1/3) Noise filter DS1 SW1 Control panel PCB J509-1 24V J509-2 J503-1 DC controller PCB Power supply assembly J316-11 24V PWOFF when "0" AC power OFF (main switch). HTPT when "0" AC power OFF (power supply unit). HTCK when "0" fixing roller heater ON. HTRD when "1" fixing roller heater ON.
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CHAPTER 2 BASIC OPERATION 2. DC Controller Outputs (2/3) DC controller PCB Pick-up clutch solenoid 24V J307-5 SL1 -6 Lens drive solenoid PUSD when "0", SL1 ON. 24V J309-1 SL2 -2 Multifeeder solenoid LNSD when "0", SL2 ON. 24V J311-9 SL3 -10 Blank solenoid MFSD when "0", SL3 ON. 24V J307-7 SL4 -8 Registration roller clutch BLSD when "0", SL4 ON. 24V J307-3 CL1 -4 RGCD when "0", CL1 ON. Figure 2-106 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 2 BASIC OPERATION 3. DC Controller Outputs (3/3) DC controller PCB 24V J309-1 Scanner cooling fan FM1 -2 FM1D when "0" FM1 ON when "0" FM2 ON when "0" Pre-exposure lamps ON when "0" Total counter operates 24V J311-1 Exhaust fan FM2 -3 Pre-exposure lamps J731 -2 J307 -1 -1 -2 FM2D 24V PEXP 24V J314-2 CNT1 Total counter -1 TCNTD Control panel PCB 5V CCV J504-2 -4 J503-11 J316-1 CCNTC When "0" Operates. -3 J503-10 -2 CCNNT When "0" Card sensed.
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!" CHAPTER 2 BASIC OPERATION E. Basic Sequence of Operations (Direct, Continuous Copying (2 sheets)) WMUPR POWER SWITCH ON 90 C 110 C COPY START key ON WMUP STBY INTR AER SCRV SCFW SCRV SCFW LSTR STBY Main motor(M1) Scanning lamp Primary/transfer corona assembly Scanner movement Scanner is set for HOME position Forward Reverse * Numbers in parentheses apply to when the CT unit is used.
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CHAPTER 2 BASIC OPERATION AER (AE rotation) SCFW (Scanner forward) SCRV (Scanner reverse) LSTR (LAST rotation) STBY (Stand-by) Period From when the scanner moves forward about 70 mm from the end of the image until it returns to its home position. When the scanner is moving forward • Travel distance changes with copy paper size. Purpose Moves the scanner forward about 70 mm from the end of the image and measures the document density.
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CHAPTER 3 EXPOSURE SYSTEM 1. Disconnect the power cord for safety before disassembly or reassembly work. 2. Group the screws by type (length and diameter) and location. 3. The mounting screws are equipped with washers to protect against static electricity; do not leave them behind when attaching the covers. 4. The mounting screw for the grounding wire is equipped with a washer to ensure electrical continuity; make sure that the washer is attached to the screw when removing/fitting it. 5.
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CHAPTER 3 EXPOSURE SYSTEM I. BASIC OPERATION A. Changing the Reproduction Ratio The reproduction ratio across the drum is varied by changing the position of the lens and the position of No. 4 and No. 5 mirrors. It is moved by the lens drive system. The reproduction ratio around the drum is varied by changing the speed of the scanner. Figure 3-101 shows how the position of the lens and mirror is varied to change the reproduction ratio across the drum. Lens No.
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CHAPTER 3 EXPOSURE SYSTEM II. LENS DRIVE SYSTEM A. Outline The lens is moved by the scanner motor (M2). Normally, the coupling gear is in its upper position, and connects the scanner motor to the scanner drive capstan. To move the lens, the lens solenoid (SL2) goes ON, causing the coupling gear to disengage from the scanner capstan gear and engage with the lens capstan gear. The lens is a "floating element" type.
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CHAPTER 3 EXPOSURE SYSTEM B.
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CHAPTER 3 EXPOSURE SYSTEM III. SCANNER DRIVE SYSTEM A. Outline The scanner is driven by the scanner motor (M2). The direction of rotation of the scanner motor determines whether the scanner moves forward or backward. The forward speed of the scanner motor is continuously variable to produce the required reproduction ratio. The reverse speed is fixed regardless of the reproduction ratio (2.5 times the forward speed for DIRECT copying).
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CHAPTER 3 EXPOSURE SYSTEM B. Relation Between Scanner Sensor and Signals Scanner sensor Signal name Scanner home position sensor (Q5) SCHP Scanner Forward Reverse Meaning • Grid bias ON • After 0.1 sec, the scanner stops advancing. Table 3-301 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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!! CHAPTER 3 EXPOSURE SYSTEM C. Basic Scanner Operation POWER switch ON WMUP COPY START key ON STBY INTR AER SCFW SCRV Forward Reverse SCFW SCRV LSTR Scanner home position sensor (Q5)signal Pre-registration paper sensor (Q2) signal Scanner movement Scanning lamp Figure 3-302 3-6 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 3 EXPOSURE SYSTEM D. Scanner Movement for Two-Page Separation Mode (copy count "2") Doc.L.E. Doc.L.E. Doc.L.E. Doc.L.E. Doc.L.E. Doc.L.E.
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CHAPTER 3 EXPOSURE SYSTEM IV. No. 4/5 MIRROR DRIVE SYSTEM 1. Outline The copier changes the reproduction ratio by varying the position of the No. 4/5 mirror and moving the lens. Figure 3-401 shows the positions of the mirror and the lens according to different reproduction ratios. The mirror is driven by the mirror motor (M3), and its position is monitored by the mirror home position sensor (Q4). The mirror is positioned with reference to the number of motor pulses counted from the mirror home position.
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CHAPTER 3 EXPOSURE SYSTEM 2. Driving the Scanner Motor (M2) and the Mirror Motor (M3) Figure 3-402 is a block diagram showing the drive circuit used for the scanner motor (M2) and the mirror motor (M3). These motors are 4-phase stepping motors. The pulse signals used to drive the motors (MIRRA, MIRRA*, MIRRB, MIRRB*) are generated by Q300 of the DC controller PCB; on the other hand, the motor select signal (MIRRCOM, SCNCOM) is generated by Q300 and Q303.
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CHAPTER 3 EXPOSURE SYSTEM 100% to 70% setting 70% to 50% setting 50% to 200% setting Scanner motor (M2) Lens HP sensor (Q6) Mirror motor (M3) Mirror HP sensor (Q4) :motor foward :motor reverce Figure 3-403 3-10 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 3 EXPOSURE SYSTEM V. DISASSEMBLY AND ASSEMBLY A. Lens Drive Assembly 1. Outline The unit is adjusted at the factory with high precision using special tools. Do not remove parts or loosen screws other than those discussed. Lens pully Lens pully fixing plate [2] 4 turns Mounting screws [4] [3] Cable fixing Pulley mount Figure 3-501 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 3 EXPOSURE SYSTEM 2. Detaching the Lens Cable 1) Detach the copyboard cover, copyboard glass, lens cover, rear cover, and upper rear cover. 2) Remove the three screws shown in Figure 3-502, and detach the upper frame. [1] [1] Screws Figure 3-502 3) Mark the position of the pulley mount and the cable mount using a scriber. 4) Remove the two screws that hold the pulley mount in place. 5) Detach the cable. 3-12 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 3 EXPOSURE SYSTEM 3. Routing the Lens Cable 1) Remove the two screws that hold the lens pulley mount in place, and detach the lens pulley; see Figure 3-501. [2] [1] [3] [1] Screws [3] Pulley mount [2] Pulley Figure 3-503 2) Wind the lens cable around the lens pulley as shown in Figure 3-504; then, fix it using two screws. 3) Shift the pulley mount to the position marked with a scriber, and fix it in place using two screws. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 3 EXPOSURE SYSTEM B. Scanner Drive Assembly 1. Detaching the Scanner Cable 1) Mark the position of the mount, and loosen screws B (2 pcs.), which hold the mount in place. 2) Loosen screw A (1 pcs.), and detach the scanner cable. 2. Attaching the Scanner Cable 1) Route the scanner cable as shown in Figure 3-504. 2) Position the fixing plate where a mark has been put using screw A. 3) Tighten screws B.
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CHAPTER 3 EXPOSURE SYSTEM 3. Adjusting the Mirror Position (optical distance between No. 1 and No. 2 mirrors) Adjust the position of the mirror after attaching the scanner cable. To adjust, relocate the fixing used for the No. 1 mirror mount; loosen the two screws. Note: i. The cable tends to become slack as more and more copies are made, requiring adjustment. ii. If the horizontal reproduction ratio becomes faulty because of inaccurate optical distance between the No. 1 and No.
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CHAPTER 3 EXPOSURE SYSTEM 4. Using the Mirror Cleaning Tool Figure 3-508 5. Cleaning the No. 6 Mirror 1) Detach the drum cartridge, developing assembly, and dustproofing glass. 2) Put the mirror cleaning tool against the mirror as shown in Figure 3-509, and clean the lens by sliding it back and forth. Use the upper registration roller as a reference for sliding back and forth. 6. Lubricating Clean the scanner rail; then, apply lubricant evenly over it. No.
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CHAPTER 3 EXPOSURE SYSTEM C. Exposure Assembly 1. Detaching the Scanning Lamp 1) Disconnect the power plug. 2) Detach the copyboard glass. 3) Remove the two screws, and detach the anti-glare plate. [1] [2] [1] Screws [2] Anti-glare plate Figure 3-510 4) Push the lamp terminal plate (rear) into the direction of the arrow, and detach the scanning lamp. [2] [1] Note: i. Wait until the scanning lamp has cooled before starting the work. ii. Do not leave fingerprints on the scanning lamp. iii.
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CHAPTER 3 EXPOSURE SYSTEM 2. Detaching the Thermal Fuse 1) Detach the control panel and the copyboard glass. 2) Hold the rear of the No. 1 mirror mount, and move it to the right until it is positioned as shown in Figure 3-512. [3] Note: When moving the No. 1 mirror mount, be sure to hold its right side. [1] [1] [2] [1] Screws [2] Thermal fuse [3] No. 1 mirror mount Figure 3-512 3) Remove the two screws, and detach the thermal fuse. 3-18 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 3 EXPOSURE SYSTEM D. Blank Assembly [1] 1. Detaching the Pre-Exposure PCB 1) Detach the rear cover. 2) Disconnect the connector (J731) from the pre-exposure PCB. 3) Hold the pre-exposure PCB using pliers, and pull it straight out taking care not to damage the PCB. 2. Detaching the Blank Assembly 1) Detach the copyboard glass, lens cover, lens motor cover, rear cover, and drum unit; then, detach the developing assembly.
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CHAPTER 3 EXPOSURE SYSTEM E. No. 4/5 Mirror Mount The screws [A] that keeps the No. 4/5 mirror mount [1] to the lens base plate must not be loosened in the field. If they are loosened, readjusting the mirror mechanical axis is not possible in the filed. [A] [1] [A] [A] Figure 3-516 3-20 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 4 IMAGE FORMATION SYSTEM I. PROCESSES ...............................4-1 A. Outline ...................................4-1 B. Basic Operation of Image Formation System (black developing assembly, 2 copies) ................................4-2 II. CONTROLLING THE SCANNING LAMP ..........................................4-3 A. Outline ...................................4-3 B. Mechanism ............................4-4 III. PRIMARY/TRANSFER CORONA CURRENT AND GRID BIAS VOLTAGE CONTROL SYSTEM ...........
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CHAPTER 4 IMAGE FORMATION SYSTEM I. PROCESSES A. Outline The basic structure of the image formation system is as shown below.
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CHAPTER 4 IMAGE FORMATION SYSTEM B.
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CHAPTER 4 IMAGE FORMATION SYSTEM II. CONTROLLING THE SCANNING LAMP A. Outline The scanning lamp (LA1) is controlled by the DC controller PCB. Specifically, the DC controller • turns the scanning lamp ON and OFF. • controls the intensity of the scanning lamp. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 4 IMAGE FORMATION SYSTEM B. Mechanism 1. Turning the Scanning Lamp ON and OFF The microprocessor (Q300) on the DC controller PCB controls the lamp regulator. The scanning lamp goes ON when the scanning LAMP ON command (LOAN) is '1', and it goes OFF when the signal is '0'. 2. Controlling the Intensity of the Scanning Lamp The intensity of the scanning lamp is controlled by the lamp shift signal. The intensity of the scanning lamp is changed.
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CHAPTER 4 IMAGE FORMATION SYSTEM III. PRIMARY/TRANSFER CORONA CURRENT AND GRID BIAS VOLTAGE CONTROL SYSTEM A. Outline The circuit shown in Figure 4-102 controls the primary/transfer coronal current and the bias voltage of the grid of the primary corona. Main functions are as follows: 1. Switching primary/transfer corona current ON/OFF 2. Maintaining primary/transfer corona current constant 3. Switching primary corona grid bias voltage 4.
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CHAPTER 4 IMAGE FORMATION SYSTEM C. Maintaining Primary/Transfer Corona Current Constant If the primary corona current is greater than the correct value due to changes in the environment, the level (analog) of the feedback signal to the differential amplifier circuit will increase and the output from the differential amplifier circuit will fall. As a result, the primary/transfer corona current will fall. Similarly, if the primary corona current is too low, it will be increased.
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CHAPTER 4 IMAGE FORMATION SYSTEM D. Controlling Grid Bias Voltage a. During scanning, the DC controller PCB output GRDON is '0' and CUR-LEV is '0'. Q9 goes ON and the comparator output is '0'. Q8 goes OFF. Current does not flow into transformer T4, and Q10 goes ON. Bias is applied to the grid. The surface of the drum is charged. The voltage applied to the grid is fixed by the shield current. b. When scanning is not taking place, the DC controller PCB output GRDON is '1', and CURLEV is '1'.
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CHAPTER 4 IMAGE FORMATION SYSTEM IV. CONTROLLING DEVELOPING BIAS A. Outline The circuit shown in Figure 4-402 controls the developing bias. Its main functions are as follows: 1. Switching the AC component of the developing bias ON/OFF. 2. Regulating the voltage of the DC component of the developing bias. The copy density can be controlled by varying the voltage of the developing bias to suit the following variables: 1. Setting of the COPY DENSITY lever and recalibration dial 2.
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CHAPTER 4 IMAGE FORMATION SYSTEM B. 1. Operation Switching the AC Component of the Developing Bias ON/OFF The square wave generator operates continuously when the copier is switched ON. a) When ACBON=1 AC bias switch circuit goes ON. Output from the square wave generator is cut off. As a result, AC bias is not supplied to the developing cylinder. b) When ACBON=0 The AC bias switch circuit goes OFF. As a result, the output of the square wave oscillator goes to the T1 drive circuit.
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. Controlling the DC Bias The differential amplifier of Figure 4-402 operates when DCBC is 16V or below. (The range of DCBC (analog) is 6 to 16V, as set by the copy density knob or the AE system.) Differential amplifier goes ON. Variable pulse-width oscillator goes ON. DC high-voltage transformer goes ON. The DC bias is applied to the developing cylinder.
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CHAPTER 4 IMAGE FORMATION SYSTEM V. DOCUMENT DENSITY MEASUREMENT SYSTEM A. Outline There is an automatic density adjustment (AE) system which adjusts the DC component of the developing bias to suit the density of the original. If the density of the original is more or less uniform, the AE function varies the DC component of the developing bias to suit the density of the original, so that copies of the correct density will be made. B.
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CHAPTER 4 IMAGE FORMATION SYSTEM C. Reading the Output of the AE Sensor The AE sensor consists of a photodiode (Q702) and an operational amplifier (Q701). If the strength of light striking the photodiode is high, the output voltage (AE) of the amplifier will be small. If the amount of light is small, the output voltage will be large. The DC controller reads the output at a certain time after the zero-cross signal (ZXDP) is received from the DC power supply.
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CHAPTER 4 IMAGE FORMATION SYSTEM D. Adjustment Make the following adjustments when the AE sensor or the DC controller PCB has been replaced. 1) Remove the potentiometer cover at the back of the left cover. 2) Set the power switch ON. • Wait until the WAIT period has ended. 3) Place an NB-3 or NA-2 test sheet on the copyboard, and lower the copyboard cover. 4) Press switch SW 300 on the DC controller PCB. • "0" will appear on the COPY COUNT/RATIO indicator on the control panel.
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CHAPTER 4 IMAGE FORMATION SYSTEM VI. DEVELOPING ASSEMBLY/DRUM CLAENER A. Outlines The paddle inside the drum cleaning unit and also the developing cylinder are rotated by the main motor. The amount of toner in the developing assembly is sensed by the black toner level sensor (TS1). When the amount of toner falls below the required quantity, the ADD TONER indicator on the control panel will flash. The toner collected by the cleaning blade is stored in the drum cleaning unit.
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CHAPTER 4 IMAGE FORMATION SYSTEM C. Torque Limiter There is a torque limiter in the drive train between the main motor and the drum used to stop the drum in response to a jam in the drum cleaner. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 4 IMAGE FORMATION SYSTEM VII.BLANKING A. Outline The area of the drum between the tailing edge of one copy and the leading edge of the next would normally act as an all-black area and attract toner if a preventive measure were not taken. This measure is to switch the primary corona OFF and the primary corona assembly grid bias ON.
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CHAPTER 4 IMAGE FORMATION SYSTEM B. Movement of the Blank Exposure Mechanism 1. When the copier is switched ON, the lens first moves in the direction of enlargement and then returns to the home position. Next, the lens moves in the direction of reduction for blank exposure up to a point that corresponds to the cassette size. At the time, the blank solenoid goes ON, and the blank exposure shutter moves in the direction of the arrow by the force of a spring.
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CHAPTER 4 IMAGE FORMATION SYSTEM 2. The blank exposure shutter is moved by the cam attached to the bottom of the lens when the lens moves to the blank exposure position, which corresponds to the cassette size. The blank solenoid (SL4) goes OFF as soon as the blank exposure shutter has moved to a cutout to fix the shutter in position; cut-offs are provided for each cassette size. DIRECT and ENLARGE copies are made with the mechanism in this position. Cam OFF Cut-offs SL4 Figure 4-703 3.
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CHAPTER 4 IMAGE INFOMATION SYSTEM VIII. DISASSEMBLY AND ASSEMBLY A. Main Motor Assembly 1. Detaching the Main Motor 1) Detach the rear cover. 2) Disconnect the connector (J651) from the mian motor. [2] [1] [2] [3] [1] Connector (J651) [2] Screw [3] Main motor Figure 4-801 3) Remove the four screws, and detach the main motor. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 4 IMAGE INFOMATION SYSTEM B. Corona System 1. Drum Unit a. Detaching the Drum Unit 1) Open the front door. 2) Release the feeder assembly, and remove the screw. [3] [4] [1] [1] [2] [3] [4] [2] Drum unit Developing assembly Developing assembly release lever Screw Figure 4-802 3) Turn the developing assembly release lever counterclockwise. 4) Pull out the drum unit to the front carefully. Note: Take care not to damage the drum.
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CHAPTER 4 IMAGE INFOMATION SYSTEM b. Cleaning If the photosensitive drum is soiled, clean it using a flannel cloth coated with toner; do not use paper, lint-free or otherwise. Note: Do not use solvent or dry wipe the drum, and never use drum cleaning powder. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 4 IMAGE INFOMATION SYSTEM C. Primary/Transfer Corona Assembly 1. Outline The photosensitive drum is surrounded by the primary and transfer corona assemblies. The primary corona assembly is equipped with a grid plate. 2. Disassembly/Assembly a. Primary Corona Assembly 1) Detach the drum unit. [1] Note: Do not expose the photosensitive drum to strong light; otherwise, white spots or black lines can occur on the copies.
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CHAPTER 4 IMAGE INFOMATION SYSTEM c. Attaching the Primary/Transfer Corona Assembly Wire ■ Primary Corona Assembly 1) Remove the four tension springs, and detach the grid plate. [1] [2] [1] [1] Grid Tension Screw [2] Grid plate Figure 4-806 ■ Transfer Corona Assembly 2) Detach the gut wire from the transfer corona assembly. 3) Free the gut wire about 40 mm from the corona wire reel (0.06 mm dia.), and form a loop at its end about 2 mm in diameter.
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CHAPTER 4 IMAGE INFOMATION SYSTEM 7) Cut the excess corona wire to about 1 mm or less using a nipper. 8) Pick the end of the corona wire tension spring using tweezers and hook it on the corona terminal. Note: i. Make sure that the corona wire is free of breaks or twists and its gold plating has not peeled. ii. Make sure that the corona wire is not slack; normal, if the length of the corona wire tension spring is 12 mm. iii. Make sure that the corona wire is in the V-groove of the height adjusting roll.
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CHAPTER 4 IMAGE INFOMATION SYSTEM D. 1. a. Development System Developing Assembly Construction Magnetic side seal Magnetic cylinder Figure 4-808 b. Detaching the Developing Assembly 1) Turn the developing assembly release lever counterclockwise. 2) Slide out the developing assembly carefully. 3) Hold the grip on the developing assembly, and take the assembly out the copier. [1] [2] [1] Developing assembly release lever [2] Developing assembly Figure 4-809 COPYRIGHT © 1999 CANON INC.
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CHAPTER 4 IMAGE INFOMATION SYSTEM c. 1) 2) 3) 4) Detaching the Blade, Developing Cylinder, and Side Seal Detach the developing assembly from the copier. Remove the screw, and detach the upper cover fixing plate. Detach the top cover. Remove the two screws, and detach the developing assembly upper cover. [2] [1] [1] Screws [2] Developing assembly upper cover Figure 4-810 5) Place a newspaper on the floor, and pour out the toner from the developing assembly.
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CHAPTER 4 IMAGE INFOMATION SYSTEM 7) Disengage the hook on the bottom, and detach the grip. [2] [1] [1] Hook [2] Grip Figure 4-812 8) Remove the three screws, and detach the developing cylinder holder (front), ball bearing, and developing roll. [3] [2] [1] [1] Screws [2] Developing cylinder holder [3] Spacer roll Figure 4-813 9) Remove the two E-rings, and remove the two gears. [2] [1] [2] [1] [1] E-rings [2] Gears Figure 4-814 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 4 IMAGE INFOMATION SYSTEM 10) Remove the two screws, and detach the developing cylinder holder (rear), ball bearing, and spacer roll. [2] [1] [3] [4] [1] Screws [2] Developing cylinder holder [3] Ball bearing [4] Spacer roll Figure 4-815 11) Detach the developing cylinder and side magnetic seal. Magnetic side seal Magnetic cylinder Figure 4-816 4-28 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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i [ CHAPTER 4 IMAGE INFOMATION SYSTEM d. Cleaning the Side Magnetic Seal and the Blade 1) Clean the surface on which the side magnetic seal will be hooked using alcohol. 2) Fix the side magnetic seal at the position shown in Figure 4-819. Attach the seal so that the long hole at its end is matched with the round hole of the developing assembly housing. Note: Put the hook of the magnetic side seal on its side on plastic marking so that the magnetic side seal is firmly in the correct position.
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CHAPTER 4 IMAGE INFOMATION SYSTEM 3) Attach all parts that have been detached except the blade. Make sure that the gear is assembled with the longer tooth in the groove. [a] [b] Figure 4-819 4) Force the blade mount against the developing assembly in the direction of the arrow, and tighten the two screws. Magnetic side seal Magnetic cylinder Figure 4-820 5) Loosen the four screws that hold the blade on the blade mount, and tighten them back.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM I. II. PAPER PICK-UP ASSEMBLY AND FEEDER.......................................5-1 A. Outline ...................................5-1 B. Pick-up and Feeder Operation ..............................5-3 C. Identifying the Paper Size .....5-4 D. Pick-Up from the Multifeeder .............................5-5 JAM DETECTION ........................5-7 COPYRIGHT © 1999 CANON INC. A. Pick-up Assembly Delay Jam ........................................5-8 B.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM I. PAPER PICK-UP ASSEMBLY AND FEEDER A. Outline When the pick-up clutch solenoid (SL1) engages, main motor (M1) turns the roller, feeding a sheet of copy paper to the registration rollers. The number of rotations of the pick-up roller varies with the length of the copy paper. The copy paper is fed by the registration rollers so that its leading edge is in line with the leading edge of the toner image on the photosensitive drum.
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5-2 COPYRIGHT © 1999 CANON INC. M1 Multifeeder solenoid drive command Cassette paper detection signal SL1 CL1 Pick-up clutch drive command Registration clutch drive command Registration paper detection signal Delivery paper detection signal SL3 CHAPTER 5 PICK-UP/FEEDING SYSTEM DC controller PCB Figure 5-102 CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Pick-up and Feeder Operation COPY START key ON STBY INTR AER SCRV SCFW SCRV SCFW LSTR STBY Main motor (M1) Scanner home position sensor (Q5) signal Pick-up clutch solenoid (SL1) Registration roller clutch (CL1) Pre-registration paper sensor (Q2) signal Delivery paper sensor (Q8) signal Counter Figure 5-103 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM C. Identifying the Paper Size The presence/absence of a cassette in the cassette holder and the size thereof are identified by four switches (CST1 through CST4) provided in the cassette holder. Based on the combinations of the switches which have been actuated, the microprocessor recognizes the presence/absence of a cassette as shown in Tables 5-101 and 5-102 and, at the same time, determines where to reverse the scanner and how to control the blank shutter.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM D. Pick-Up from the Multifeeder The multifeeder pick-up roller and holding plate are driven by the main motor (M1). The presence/absence of paper is monitored by the multifeeder paper sensor (Q1). When the Copy Start key is pressed, the multifeeder solenoid (SL3) turns on temporarily, causing the claw 1 to disengage from the control ring.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM Paper set Copy Start key ON STAND BY INITIAL ROTATION SCAN FORWARD SCAN REVERSE Multifeeder paper sensor (Q1) Main motor (M1) Pre registration paper sensor (Q2) Multifeeder solenoid (SL3) Registration roller clutch (CL1) Figure 5-105 5-6 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM II. JAM DETECTION The copier has two sensors to sense whether copy paper is being fed normally. • Pre-registration paper sensor (Q2) • Delivery paper sensor (Q8) A paper jam is identified by the microprocessor by reading signals from the sensors at predetermined times. In relation to the presence/absence of paper at a sensor at that time, it identifies if paper is moving through the copier correctly.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM A. Pick-up Assembly Delay Jam If the copy paper does not reach the paper sensor of the pick-up assembly within a specified period after paper pick-up starts, the microprocessor will judge that a pick-up delay jam has occurred, and immediately stop the operation of the copier. Also, the JAM indicator on the control panel will flash and a segment of the PAPER SELECT/JAM indicator will go ON. 1.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Delivery Assembly Stationary Jam If the copy does not pass the delivery assembly paper sensor within the specified period after the registration roller clutch (CL1) operates, the microprocessor will judge that a delivery unit stationary jam has occurred, and immediately stop the operation of the copier. Also, the JAM indicator on the control panel will flash and a segment of the PAPER SELECT/JAM indicator will go ON.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM C. Delivery Assembly Delay Jam If the copy paper does not reach the delivery assembly paper sensor (Q8) within the specified period after the registration roller clutch (CL1) has operated, the microprocessor will judge that a delivery assembly delay jam has occurred, and immediately stop the operation of the copier. Also, the JAM indicator on the control panel will flash and a segment of the PAPER SELECT/JAM indicator will light.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM III. FEEDER SYSTEM A. Pick-up Assembly 1. Detaching the U Guide Plate 1) Detach the inside cover, right cover, and rear cover; then, detach the right door. 2) Disconnect the connector. [1] [1] Connector Figure 5-301 3) Remove the pick-up roller assembly. 4) Remove the E-ring and slide the bush. [2] [1] [1] E-ring [2] Bush Figure 5-302 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 5) Remove the E-ring and slide the bush. [2] [1] [1] E-ring [2] Bush Figure 5-303 6) Detach the U guide plate. [1] [1] U guide plate Figure 5-304 5-12 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Detaching the Pick-up Roller Assembly 1) Detach the cassette, the inner cover, the rear cover and the right cover. 2) Detach the pick-up roller bushing found at the front. [1] [1] Bushing Figure 5-305 3) Remove the power supply unit and the noise filter. 4) Detach the control ring from the pick-up roller shaft. [1] [1] Control ring Figure 5-306 5) Detach the pick-up roller bushing found at the rear. [1] [1] Bushing Figure 5-307 COPYRIGHT © 1999 CANON INC.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 6) Shift the pick-up roller assembly to the rear, and detach the pick-up roller shaft from the front door cassette area. [1] [1] Pick-up roller assembly Figure 5-308 Note: When attaching the pick-up roller assembly, the cut-off of the sliding bush must match the base plate. Base plate [1] Cut-off Cut-off [2] Base plate Figure 5-309 5-14 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 3. Front Pick-Up Roller 1) Remove the pick-up roller assembly. 2) Remove the front pick-up roller. [1] [1] Front pick-up roller Figure 5-310 4. Detach the Rear Pick-up Roller from the Sliding Bush 1) Remove the pick-up roller assembly. 2) Bend the rib of the pick-up roller. 3) Pull the pick-up roller out of the support. [1] [1] Rib [2] [2] Pick-up roller Figure 5-311 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 5. Detaching the Multifeeder Roller 1) Detach the right door. 2) Remove the E-ring and remove the multifeeder roller together with its shaft. [2] [1] [1] E-ring [2] Multifeeder roller Figure 5-312 6. Detaching the Multifeeder Pad 1) Detach the right door. 2) Remove the multifeeder roller. 3) Detach the feed guide. [1] [1] Feed guide Figure 5-313 4) Remove the multifeeder pad from the bush. [1] [1] Mutlifeeder pad Figure 5-314 5-16 COPYRIGHT © 1999 CANON INC.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM B. 1. Feeder Assembly Feeder Assembly Note: Make sure that the drum unit transfer corona assembly and developing assembly have been detached before detaching the feeder assembly. 1) Release the feeder assembly 2) Detach the DC contoroller PCB. 3) Remove the E-ring, and detach the bushing [2] [1] [1] E-ring [2] Bushing Figure 5-315 4) Detach the inside cover, and remove the E-ring; then, detach the bushing.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 6) Hold the side of the feeder assembly closer to the fixing assembly, and pull it out toward the front slowly as if to lift it. [1] [1] Feeder assembly Figure 5-317 5-18 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Feeder Belt 1) Detach the feeder assembly. 2) Remove the two screws, and detach the rail cover found at the front. [1] [2] [1] Screws [2] Rail cover Figure 5-318 3) Remove the two screws found at the front that hold the corona assembly rail in place. [2] [1] [1] Screws [2] Corona assembly rail Figure 5-319 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM 4) Remove the two screws, and detach the terminal holder found at the rear. [1] [1] Screws [2] [2] Terminal holder Figure 5-320 5) Remove the two screws found at the rear, and detach the corona assembly rail. [2] [1] [1] Screws [2] Corona assembly rail Figure 5-321 6) Detach the feeder belt. [1] [1] Feeder belt Figure 5-322 5-20 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM I. BASIC OPERATIONS ..................6-1 A. Outline ...................................6-1 B. Operation of Fixing Assembly Temperature Control System ..................................6-3 COPYRIGHT © 1999 CANON INC. III. DISASSEMBLY AND ASSEMBLY ..................................6-4 A. Fixing Assembly ....................6-4 CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM I. BASIC OPERATIONS A. Outline The upper and lower rollers of the fixing assembly are driven by the main motor (M1). The upper roller is heated by a single heater (H1: 900W). When the surface temperature of the roller rises, the resistance of the thermistors (TH1/TH2) falls, so the voltage of the signal FIXING ROLLER SURFACE TEMPERATURE signal (MAIN-TH/AUX-TH) also falls.
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CHAPTER 6 FIXING SYSTEM Main motor M1 Fixing roller heater H1 900W Upper fixing roller J317-2 TH2 -1 J317-4 Thermistor 2 (AUXTH) Microprocessor (Q300) TH1 Thermistor 1 (MTH) -3 Delivery rollers Lower fixing roller 5V J318-2 HTON Thermoswitch F1 230˚C 24V J318-1 HTRD K100 J318-3 HTPT 24V Error detection circuit Power supply assembly DC controller PCB Figure 6-101 6-2 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM B.
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CHAPTER 6 FIXING SYSTEM III. DISASSEMBLY AND ASSEMBLY A. 1. Fixing Assembly Construction Upper separation claw Cleaning roller Upper roller Paper guide Lower roller Heat sink roller Lower separation claw Figure 6-201 2. Detaching the Fixing Assembly 1) Remove the screw, and detach the fixing assembly knob. [2] [1] [1] Screw [2] Fixing assembly knob Figure 6-202 6-4 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM 2) Remove the three screws, and detach the blanking plate and the left cover. [1] [3] [2] [1] [1] Screws [3] Left cover [2] Blanking plate Figure 6-203 3) Disconnect the three connectors. [1] [1] Connectors Figure 6-204 4) Remove the two screws, and slide out the fixing assembly. [1] [1] Screws Figure 6-205 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM 3. Detaching the Upper Fixing Roller, Heater, and Lower Fixing Roller 1) Detach the fixing assembly from the copier. 2) Pull out faston A (See Figure 6-207), and remove the two screws; the heater mount plate (front) can be detached in this condition. [1] [2] [1] [1] Screw [2] Heater mount plate (front) Figure 6-206 3) Pull faston B, and remove the mounting screw from the heater mount plate found at the rear; then, pull out the heater mount plate (rear) and the heater carefully.
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CHAPTER 6 FIXING SYSTEM 4) Remove the two screws, and detach the thermistor cover. [1] [2] [1] Screws [2] Thermistor cover Figure 6-208 5) Remove the screw, and detach the thermistor mount. 6) Remove the screw, and detach the thermal switch mount. [1] [1] [2] [3] [1] Screw [2] Thermistor mount [3] Thermal switch mount Figure 6-209 7) Remove the C-ring at the rear, and detach the gear. [1] [2] [1] C-ring [2] Gear Figure 6-210 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM 8) Remove the E-ring, and detach gear A. 9) Remove the C-ring, and detach two gears B. [4] [3] [2] [1] E-ring [3] C-ring [1] [2] Gear A [4] Gear B Figure 6-211 [1] 10) Remove the two screws, and detach the bushing. [2] Note: The bushing is pushed up from below. If it is difficult to detach, try pushing the upper fixing roller to the bottom to facilitate detachment.
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CHAPTER 6 FIXING SYSTEM 4. Attaching the Heater and Upper Fixing Roller Attach the heater and the upper fixing roller as in detaching them but in reverse order while noting the following: a. Heater i. Do not touch the surface of the heater. ii. Make sure that the end showing the manufacturer's name is to the front. b. Upper Fixing Roller i. Wrap the roller with copy paper to prevent soiling or scarring its surface. ii. Make sure that the end with two C-rings is to the rear. iii.
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CHAPTER 6 FIXING SYSTEM 5. Adjusting the Nip Width (tightening the pressure adjusting nut) If the nip width is not as shown in Figure 6-214, turn the bolt to adjust it. c Feed direction A3 size b Center of copy a Note: a and c represent points 10 mm from each end. Dimension b |a-c| Figure 6-214 Measure after the upper and lower rollers have heated up. 4.5 ±0.5 mm 0.5 mm or less Table 6-201 a. Measuring the Nip Width If the roller is not heated, wait for 15 min.
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CHAPTER 6 FIXING SYSTEM 6. Mounting the Thermistors Make sure that the sensor face of the thermistor is in even contact with the surface of the upper fixing roller. Note: The position of the thermistor need not be adjusted; if the contact is not even, make sure that the thermistor spring is not deformed. Thermistor spring Upper roller Thermistor Figure 6-215 7. Attaching the Thermoswitch Make sure that the sensor face of the thermoswitch is in even contact with the surface of the upper fixing roller.
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CHAPTER 6 FIXING SYSTEM 8. Position of Paper Guide The position of the paper guide is adjusted by the paper guide mount. For this reason, the position of the paper guide need not be adjusted. Note: To adjust the position of the paper guide, place the fixing assembly on a desk, and move the paper guide so that the position is as shown Figure 6-217. 43 mm Note: If the paper guide mount has been detached, the position of the paper guide must be adjusted.
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CHAPTER 6 FIXING SYSTEM 10. Detaching the Upper Separation Claw 1) Open the delivery assembly. 2) Detach the cleaning roller. 3) Remove the three screws, and detach the upper separation claw assembly. [1] [2] [1] [1] Screw [2] Upper separation claw assembly Figure 6-219 4) Remove the spring, and detach the upper separation claw. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 6 FIXING SYSTEM 11. Attaching the Upper Separation Claw Attach the upper separation claw as detaching it but in reverse order with the following in mind. a. Make sure that the boss on the upper separation claw is in contact with the mount as shown in Figure 6-220. Figure 6-220 b. Make sure that the upper separation claw assembly is fully toward the rear. If a scratch is noted on the upper fixing roller, move the upper separation claw assembly about 4 mm toward the front.
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CHAPTER 6 FIXING SYSTEM 12. Detaching the Lower Separation Claw 1) Open the delivery unit. 2) Slide the lower separation guide plate [1] to remove. [1] Figure 6-222 3) Remove the spring, and remove the lower separation claw. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS I. II. POWER SUPPLY .........................7-1 A. AC Driver DC Power Supply ...................................7-1 DISASSEMBLY AND ASSEMBLY ..................................7-3 COPYRIGHT © 1999 CANON INC. A. B. C. D. E. External Covers .....................7-4 Control Panel.........................7-7 Copyboard Cover ..................7-9 Fans .......................................7-9 PCBs .................................. 7-11 CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS I. POWER SUPPLY A. AC Driver DC Power Supply 1. Outline The AC driver/DC power supply PCB is supplied with AC power when the door switch (DS1) and the power switch (SW1) go ON. On the other hand, the DC power supply supplies the main body with 24 VDC and 5 VDC.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS Sorter power supply (option) AC load Lamp driver unit fixing heater ADF power supply (option) Door Power switch switch (DS1) (SW1) F101 Fuse K101 Relay AC drive circuit Noise filter 24V Scanner motor AC OFF 24V 24V SMPS Main motor Mirror motor 24V 24V Regulator 2 5V 24V 24V 5V AC driver/DC power supply PCB DC loads HVT AE sensor Photointerrupters DC controller PCB Figure 7-101 7-2 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS II. DISASSEMBLY AND ASSEMBLY This section explains mechanical characteristics and describes how to disassemble/assemble the machine. Be sure to observe the following whenever disassembling/assembling the machine: 1. Disconnect the power plug before starting the work. 2. Unless otherwise shown, assemble the parts by reversing the steps given to disassemble them. 3. Identify each screw by type (length, diameter) and location. 4.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS A. External Covers [1] [2] [3] [4] Detach the covers as necessary when cleaning, checking, or repairing the inside of the machine. Covers that can be detached by mere removal of the fixing screws are omitted from the discussions.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS [2] [3] [1] [10] [9] [8] [6] [4] [7] [5] [1] Copyboard glass [2] Power indicator [3] Power switch [4] Developing assembly release lever [5] Developing assembly [6] Stack eliminating charger [7] Primary charger wire cleaner [8] Feeder assembly release lever [9] Copy density knob [10] Inner cover Figure 7-203 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS 2. Detaching the Right Door 1) Open the right door. 2) Remove the two screws. [1] [1] Screws Figure 7-204 3) Detach the right door as if to lift it out of the cut-offs. [1] [1] Right door Figure 7-205 7-6 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS B. Control Panel 1. Detaching the Control Panel 1) Detach the inside cover and the left cover. 2) Disconnect the fasteners. [1] [1] Fasteners Figure 7-206 3) Disconnect four connectors from DC controller PCB. [1] [1] [1] Connectors Figure 7-207 4) Remove the five screws, and lift the control panel toward the front to detach. [2] [1] [1] [1] Screws [2] Control panel Figure 7-208 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS 5) Lift the control panel to the front, and turn it over. [1] Note: Do not force the control panel, or the harness connected to it may snap off. [1] Control panel Figure 7-209 7-8 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS C. Copyboard Cover 1. Replacing the Copyboard Sheet The copyboard sheet is attached to the copyboard cover using adhesive tape and can be detached by pulling at its corner. After replacement, make sure to even out the sheet for even contact. D. Fans 1. Outline The copier is equipped with two fans to circulate the air inside the machine, thereby preventing the machine from overheating. Each fan serves the following function.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS 3. Exhaust Fan (FM2) 1) Open the front door, and detach the drum unit. 2) Detach the rear cover. 3) Disconnect the connector (J310) from the DC controller PCB, and remove the two screws. [2] [2] [1] [1] Connector [2] Screw Figure 7-212 4) Detach the ozone filter and the inside cover; then, lower the feeder assembly. 5) Hold the exhaust fan assembly on its bottom, and remove the two screws; then, pull the assembly to the front.
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CHAPTER 7 EXTERNAL/AUXILIARY MECHANISMS E. PCBs 1. DC Controller PCB 1) Remove the rear cover. 2) Disconnect all connectors on the DC controller PCB. 3) Remove the two screws; then, remove the DC controller PCB together with its mount. [2] [1] [2] [1] [3] [1] Connectors [2] Screw [3] DC controller PCB Figure 7-214 2. Power Supply Unit 1) Remove the rear cover. 2) Disconnect all connectors on the power supply unit. 3) Remove the two screws; then, remove the power supply unit.
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CHAPTER 8 INSTALLATION I. II. LOCATION ...................................8-1 UNPACKING AND INSTALLING THE COPIER ...............................8-2 A. Unpacking .............................8-2 B. Mounting the Drum ...............8-4 C. Checking the Operation ........8-5 D. Adding Toner .........................8-6 COPYRIGHT © 1999 CANON INC. E. Checking the Image ..............8-7 F. Universal Cassette Code Setting "123" .........................8-8 III. RELOCATING THE COPIER .......8-9 IV.
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CHAPTER 8 INSTALLATION I. LOCATION The location of the copier should be chosen based on the following considerations. If possible, make a visit to the user for a study of the site before delivery of the copier. a. The ambient temperature should be between 15° and 35°C and the humidity, 10% to 80%. Avoid locations near water faucets, humidifiers, water boilers, and refrigerators. b. Avoid locations near open fire or subject to dust or ammonia fumes and direct rays of the sun.
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CHAPTER 8 INSTALLATION II. UNPACKING AND INSTALLING THE COPIER When a piece of metal is moved from a cold place to a warm place, droplets of water form on its surface. This phenomenon is known as "condensation" and affects the performance of machines. The simplest way to eliminate condensation in the copier, any machines for that matter, is to leave it alone until it warms to room temperature (at least one hour). A. Unpacking Step 1 2 3 4 5 6 Work Open the shipping carton.
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CHAPTER 8 INSTALLATION Step 7 8 Work Open the front cover, and disengage the developing assembly, and remove it from the copier. Remove the cushion blocks from the feeder assembly and fixing assembly. Remarks Check that the developing cylinder is free of scratches. Cushion Cushion 9 Disengage the feeder assembly, remove the knob, and remove the dummy drum. Dummy drum Knob Keep the knob for later use. COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 8 INSTALLATION Step 10 Work Open the delivery cover, and remove the two fixing roller release rolls; then, close the delivery cover. Remarks Release rolls B. Mounting the Drum The photosensitive drum is susceptable to light; if exposed to room light, it can cause white spots or black lines on the copy images. As such, be quick in performing the following work. Step 1 2 3 4 8-4 Work Take out the drum unit from the box, and remove the light-blocking sheet.
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CHAPTER 8 INSTALLATION C. Checking the Operation Step 1 2 3 4 5 6 7 8 9 Work Turn the door switch ON using the door switch actuator. Connect the power plug, and shift the POWER switch to "ON". Set the cassette size to suit the needs of the user. Put copy paper in the cassette, and set the cassette in the copier. Set the copy tray on the copier. Open the copyboard cover, and remove the protection seal and the cushions. Record the reading of the copy counter.
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CHAPTER 8 INSTALLATION D. Adding Toner Step 1 2 3 4 5 Work Remove the door switch actuator. Disengage the developing assembly, and slide it until it stops. Shake the toner cartridge well. Open the developing assembly lid, and fit the boss on the rear end of the toner cartridge into the hole of the plate on the rear end of the developing assembly; thereafter, pull the toner cartridge to the front somewhat so that it comes into contact with the boss found on the left side of the front.
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CHAPTER 8 INSTALLATION E. Checking the Image Step 1 Work Place the Test Sheet on the copyboard, and check the image. 2 Feed paper in the manual mode. 3 Clean up the area around the copier, and fill out the Service Sheet. Remarks Check that copies are made without a problem and the non-image width along the leading edge is correct; otherwise, make adjustments. Non-image width: 2.0mm (approx.) for leading edge 2.5mm (approx.
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CHAPTER 8 INSTALLATION F. 1. 2. 3. 4. Universal Cassette Code Setting "123" By means of this program, it is possible to set the paper size to universal cassette code. Active service program by pressing "Sorter" key. The "0to6" or "ZOOM+/-" keys set the paper size to universal cassette code. The universal paper size code is indicated on the control panel display ("0 to 6").
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CHAPTER 8 INSTALLATION III. RELOCATING THE COPIER Perform the following when relocating the copier by truck or other means of transportation. Step 1 2 3 4 5 Work Remove the drum unit. Check Fix the scanner, and mirror carriage in place. Tape the corona assembly release lever in place against vibration. Tape the front door and delivery assembly. Place a sheet of A3 paper on the copyboard glass, and tape the copyboard cover. Remarks Put the drum unit in a separate box for transport. Fix the No.
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CHAPTER 8 INSTALLATION IV. INSTALLING THE CONTROL CARD-V 1) Detach the control panel. 2) Remove the slot cover [1] and the screw [2]. [1] [2] Figure 8-601 3) Set the control card main unit [1] and fix it to the control panel with four screws [2]. [2] [1] [2] [2] Figure 8-602 8-10 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 8 INSTALLATION 4) Disconnect the shorting connector [1]. [1] Figure 8-603 5) Connect the relay cable [1] to the control card connector [2] and the control panel PCB connector [3]. [2] [1] [3] Figure 8-604 6) Route the cable [1] as shown in Figure 8605. [1] Figure 8-605 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 8 INSTALLATION 7) Fix the grounding wire [1] to the support plate [2]. [1] [2] Figure 8-606 8) Attach the control panel sheet [1] to the control panel. [1] Figure 8-607 9) Attach the control panel to the main body. 8-12 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 9 MAINTENANCE AND SERVICING I. II. PERIODICALLY REPLACED PARTS ..........................................9-1 DURABLE PARTS........................9-2 COPYRIGHT © 1999 CANON INC. III. BASIC PROCEDURE FOR PERIODIC SERVICING ...............9-3 IV. PERIODIC SERVICING SCHEDULE .................................9-4 CANON NP6317 REV.0 APR.
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CHAPTER 9 MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS To maintain the copier at its peak performance, the parts listed in the following chart must be replaced periodically. Although the deterioration of a part may not be visible, it can seriously hamper the performance of the copier if not replaced on schedule. Parts should be replaced during the regular service visit that is closest to the end of the service life of the part. as of March 1999 No.
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CHAPTER 9 MAINTENANCE AND SERVICING II. DURABLE PARTS The values shown in the table below indicate the expected average life (number of copies) of parts which may require replacement at least once during the warranty period due to deterioration or damage but which can be simply replaced in order to restore the performance of the copier. as of March 1999 No. Description Part No.
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CHAPTER 9 MAINTENANCE AND SERVICING III. BASIC PROCEDURE FOR PERIODIC SERVICING Note: i. Perform periodic servicing after every 15,000 copies, as a general rule. ii. Before making a service call, check the service log and take along any replacement parts that are likely to be needed: No. 1 2 3 Procedure Note the operator's comments. Record the counter reading. Make DIRECT and two-page overlay test copies. 4 Clean the corona assemblies. 5 Clean separation feeder assemblies.
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CHAPTER 9 MAINTENANCE AND SERVICING IV. PERIODIC SERVICING SCHEDULE Note: Do not use solvents or oils other than those specified. : Clean : Replace Unit External Scanner drive assembly Feeder Optical path Corona assemblies Developing assembly Fixing assembly Drum unit : Lubricate : Adjust : Check Periodic servicing Every * Every 15,000 30,000 copies copies Description Remarks Clean with alcohol. Replace yearly. Clean with alcohol then apply high viscosity lubricating oil (TKN0451).
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CHAPTER 10 TROUBLESHOOTING I. MAINTENANCE AND INSPECTION ............................ 10-1 A. Basic Image Adjustment Procedure ........................... 10-1 B. Points to Check for Periodic Maintenance ....................... 10-2 II. STANDARDS AND ADJUSTMENT .......................... 10-3 A. Mechanical ......................... 10-3 B. Electrical ........................... 10-17 III. IMAGE TROUBLESHOOTING ............ 10-21 A. Initial Check ...................... 10-21 B. Samples of Image Faults ....
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Guide to Troubleshooting Tables The troubleshooting procedures in this manual are prepared in the form of tables, rather than flow charts. Study the following for an idea of how to consult the tables. EX. AC power is absent.
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I. MAINTENANCE AND INSPECTION A. Image adjustment should be performed using the following settings: 1. Manual (non AE) exposure 2. Density cursor setting : 5 3. DIRECT reproduction ratio Adjust the image by the following procedure when the photosensitive drum has been replaced. Make this adjustment with the upper front panel and front door installed. Adjusting side-to side density Pre-check Basic Image Adjustment Procedure Adjusting the density Clean the corona wires.
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B. Points to Check for Periodic Maintenance Optical path Copyboard/Scanner Location Copyboard glass Reflectors Tool/Cleaner Alcohol Blower brush Mirrors 1, 2 and Blower brush or 3 alcohol and lint-free paper Location Action/Remarks Cleaning Lens Cleaning Dust-proofing glass Clean with a blower brush. If dirt cannot be removed with a blower brush, clean with alcohol. Tool/Cleaner Action/Remarks Blower brush or alcohol and lint-free paper Clean with a blower brush.
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: 9 , + CHAPTER 10 TROUBLESHOOTING II. STANDARDS AND ADJUSTMENT A. 1. Mechanical Leading Edge Non-Reproduced Area There is a white strip on the bottom of the copyboard glass in the position shown in the figure below. If bias is being applied to the grid of the primary corona while the scanner is passing over the white strip, the leading edge of the copy will be reproduced blank.
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CHAPTER 10 TROUBLESHOOTING 2. Leading Edge Registration Make adjustments in the service mode (C2) so that the distance shown is 10.0 ±1.5 mm when the test sheet is copied in DIRECT. Note: Adjust the leading edge non-reproduced area before making this adjustment. 10.0 ±1.5 mm Figure 10-203 A higher setting in the service mode (C2) increases the leading edge margin. 3. a. Side-to-Side Registration Cassette Feeding The standard near side registration on a DIRECT copy of the test sheet is 10.0 ±2 mm.
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CHAPTER 10 TROUBLESHOOTING b. Multifeeder Feeding The standard near side registration on a DIERCT copy of the test sheet is 10.0 ±2 mm. 0 2 4 6 10 ±2 mm 8 10 Figure 10-206 Loosen the screw, and adjust the multifeeder side guide by sliding it. Then, tighten the screw. Screw Side guide Figure 10-207 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING 4. Installing the Lens Drive Cable This unit has been accurately adjusted at the factory with special gauges. Do not remove parts other than those shown below, nor loosen any other screws. Lens pulley Lens pulley fixing plate [2] 4 turns Mounting screws [4] [3] Cable fixing Pulley mount Figure 10-208 a. 1) 2) 3) 4) Removing the Lens Cable Remove the two screws and remove the lens cover. Mark the positions of the pulley fixing base and the wire fixing piece with a scriber.
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CHAPTER 10 TROUBLESHOOTING 5. Installing the Scanner Drive Cable [6] [2] Pulley 1 Pulley 3 [5] [6] Top groove Lower groove Scanner pulley [4] [1] [3] Pulley 2 Mark the position 4 turns Screw A Screws B Figure 10-209 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING 6. Adjusting the Tension of the Scanner Drive Cable Move the mirror 1 mount to the home position (start position). As shown in Figure 10-210, pull at point [A] (approximate center) of the free cable with a spring gauge so that the cable lengths touch each other. If the reading on the spring balance is not about 1.0 ±0.5 kg, loosen the screws [B] of Figure 10-213, turn screw [A] to achieve this reading, and then tighten the screws [B]. 1.0 ±0.
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CHAPTER 10 TROUBLESHOOTING 7. a. Adjusting the Position of the Mirrors and Lens Adjusting the Position of the No.1 Mirror Mount (length of optical path between mirrors 1 and 2) Adjust the tension of the scanner drive cable before making this adjustment. Adjust the position of the scanner (mirror 1) by altering the tension of the scanner drive cable. (Loosen the cap screws.) For reference: 1. The cable will stretch after a large number of copies have been made, making readjustment necessary. 2.
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] \ [ Z Y X CHAPTER 10 TROUBLESHOOTING For reference: If the distance between the mirrors is short, the image will be enlarged. If the distance is long, the image will be reduced. No.1 mirror mount Fixing screws (front) [a] Mirror drive cable [b] (rear) Figure 10-213 Top View 10-10 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING b. 1) 2) 3) 4) Adjusting the Direct Copy Ratio (lens position) Make a Direct copy. Check the copy ratio. If the copy ratio is not appropriate, perform the following steps: Enter service mode C10 (lens home position adjustment). Try increasing or decreasing the value using the +/- keys. The (-) key moves the lens position for enlargement (0.113%). 5) Exit from the service mode; and then turn the main switch to OFF/ON. 6) Make a Direct copy. 7) Check the copy ratio.
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CHAPTER 10 TROUBLESHOOTING 8. Adjusting the Tension of the Belt The main motor drives the drum via a timing belt. Adjust the tension of the belt by selecting the mounting hole of the main motor so that when the center of the timing belt is pushed down with a force of 500g, the distance between the two runs of the belt is between 20 and 25 mm. Main motor mounting holes Tension decreases Dimension 20 to 25 mm Tension Increases Spring scal 500g Belt Drum drive unit Main motor Figure 10-214 9.
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CHAPTER 10 TROUBLESHOOTING 10. Installation Position of the Scanner Drive Assembly Loosen the four screws of the scanner drive assembly; then, while pushing the scanner drive assembly against the rear plate (direction of arrow [1]), move it in the direction of the manual feed tray (direction of arrow [2]) so that it touches the pulley base and the lens gear. In this condition, tighten the screws, and confirm that there is play between the lens gear and the gear of the lens drive capstan.
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CHAPTER 10 TROUBLESHOOTING 12. Adjusting Height of the Corona Wires Corona assembly Primary corona assembly Standard position Allowable range ±2 mm Approx. 10.5 mm Transfer corona assembly ±2 mm Approx. 10 mm Figure 10-218 Note: The height (position) of the corona wire of the primary and transfer corona assemblies can be adjusted by turning the screw at the back of the corona wire. Turning the screw once causes the height of the corona wire to change by about 0.7 mm.
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L > CHAPTER 10 TROUBLESHOOTING 13. Adjusting the Fixing Assembly Roller Pressure (adjusting the nip width) The nip width should conform to the dimension shown in Table 10-201. Adjust the nip width with the bolts if it is out of standard. c Direction of advance of paper A3 size b Center of copy paper a Note: a and c are 10 mm from both edges of the copy paper. Figure 10-219 Dimension b |a-c| Measure after the upper and lower rollers have been adequately heated. (10 blank copies) 5.0 ±0.5 mm 0.
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CHAPTER 10 TROUBLESHOOTING 14. Degree of Arching (multifeeder) Make the following adjustments if the copy paper picked up from the multifeeder moves askew or wrinkles are noted on the leading edge of the copy paper; the adjustments are made by changing the degree of arching of the copy paper between the multifeeder pick-up roller and the registration roller. 1) Set 50 sheets of A4 paper (80 g/m2) on the multifeeder tray. 2) Press the PAPER SELECT key on the control panel to select the multifeeder.
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CHAPTER 10 TROUBLESHOOTING B. Electrical 1. List of PCBs/VRs/LEDs/Check Pins Variable resistors, LEDs and check pins which are used for adjustments in the field are listed below. VRs and check pins not listed here are used only for factory adjustments, which require special tools and measuring instruments, as well great care and precision. Do not attempt to adjust such parts. Notes: 1. Leakage current may flow through some LEDs and cause them to glow dimly even though they are supposed to be OFF. 2.
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CHAPTER 10 TROUBLESHOOTING 2. AE Adjustment Make the following adjustments when the AE sensor or the DC controller PCB has been replaced. 1) Remove the potentiometer cover at the back of the left cover. 2) Set the power switch ON. • Wait until the WAIT period has ended. 3) Place an MB-3 or MA-2 test sheet on the copyboard, and lower the copyboard cover. 4) Press switch SW300 on the DC controller PCB. • "0" will appear on the COPY COUNT/RATIO indicator on the control panel.
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CHAPTER 10 TROUBLESHOOTING 3. Lamp Brightness Adjustment (50%, 200%) Before adjusting the lamp brightness (50%, 200%), adjust the optimum exposure in the direct reproduction ratio (F5, w/o AE, copy density knob is centered, using the NA3 chart). Then, perform the adjustment below. a. 1) 2) 3) 4) Adjusting the Lamp Brightness (50%) Make a 50% copy. Check the exposure; if it is not satisfactory, perform the following: Enter service mode C24.
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CHAPTER 10 TROUBLESHOOTING 4. Checking Photointerrupters No. Purpose (+) lead (-) lead Check; operation is normal if the meter needle swings to the right No. Purpose (+) lead (-) lead Check; operation is normal if the meter needle swings to the right No. Purpose (+) lead (-) lead Check; operation is normal if the meter needle swings to the right 10-20 Q1 Multifeeder paper sensor (MFPD) J311-5 J311-4 With the copier in STANDBY, raise and lower the arm manually. • Arm raised: voltage approx. 0.
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CHAPTER 10 TROUBLESHOOTING III. IMAGE TROUBLESHOOTING A. Initial Check 1. Checking the Installation Environment a. The line voltage should be within 10% of the voltage on the rating plate. b. The copier should not be installed in a hot or humid location (such as near a water faucet or humidifier), a cold area, near an open flame, or in a dusty location. c. Do not install the copier in a location where ammonia gas is generated. (diazo copiers, etc.) d. Do not install the copier in direct sunlight.
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CHAPTER 10 TROUBLESHOOTING 8. Check the Copy Paper a. Is copy paper recommended by Canon being used? b. Has the copy paper absorbed moisture? Open a now package of copy paper and make copies, then compare the copies. 9. Others When a copier is brought in to a warm room from a warehouse or other cold area in winter, particularly when it is being installed, condensation may form inside the copier and cause various problems. Examples of problems: a.
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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. 10-24 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING C. 1. Troubleshooting of Image Faults Light image (halftone areas only) Cause/Problem area Procedure 1 AE adjustment Black developing assembly 2 Lens, dustproofing glass Photosensitive drum 4 3 COPYRIGHT © 1999 CANON INC. Check Result Action Does the image quality improve after the basic adjustment procedure is followed? Is the image lighter is when a copy is made using AE? Is the image lighter when a copy is made using a black developing assembly? Yes End.
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CHAPTER 10 TROUBLESHOOTING 2. 3. Light image (even in dark areas) Light image (very light overall) Cause/Problem area Procedure Check Result 1 Does the image quality improve after the basic adjustment procedure is followed? Switch the copier OFF during copying and open the front door.
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CHAPTER 10 TROUBLESHOOTING 4. 5. Uneven density (front side dark) Uneven density (front side light) Cause/Problem area Primary corona wire height Developing assembly Procedure Check Result Action 1 Does the image quality improve after the basic adjustment procedure is followed? Yes End.
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CHAPTER 10 TROUBLESHOOTING 6. Fogging (overall) Cause/Problem area Procedure Check Result 1 Does the image quality improve after the basic adjustment procedure is followed? Does the image improve after the scanning lamp, reflectors, mirrors, lens and dustproofing glass are cleaned? Does the pre-exposure lamp go ON during copying? Yes End. Yes End. No Set the meter to the 30VDC range and measure the voltage between J307-6 (+) and J307-7 (-) of the DC controller PCB.
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CHAPTER 10 TROUBLESHOOTING 9. Dark lines (thin lines in paper feed direction) Cause/Problem area Photosensitive drum Developing system, Exposure system Fixing assembly Procedure Check Result 1 Press the COPY START key and switch the copier OFF to stop the paper on the feeder.
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CHAPTER 10 TROUBLESHOOTING 10. White strips (in paper feed direction) 11. Narrow white lines (in paper feed direction) Cause/Problem area Fixing assembly Procedure Check Result Action 1 Press the COPY START key with the copyboard cover open, then switch the copier OFF to stop the copy paper on the feeder.
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CHAPTER 10 TROUBLESHOOTING 12. White strips (in cross feed direction) Cause/Problem area Developing assembly Procedure Check Result Action 1.Clean the developing cylinder spacer rollers. 2.Clean the surface of the developing cylinder. 3.If there are scratches on the surface of the developing cylinder, replace the cylinder or the CT unit. 1.Clean the drum. 2.If the drum is scratched, replace it. The paper may be absorbing moisture, so instruct the use about the correct method of storing paper. 1.
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CHAPTER 10 TROUBLESHOOTING 13. Toner marks on back of copy paper Cause/Problem area Procedure Check Result 1 Press the COPY START key, and switch the copier OFF while the copy paper is on the feeder. Are there any toner marks on the back of the copy paper? Do the toner marks occur at intervals of approx. 50mm? No Check from step 3. Yes 1.Clean the registration rollers and transfer assembly guide. 2.Check if toner is leaking from the developing assembly. 1.Clean the upper and lower fixing rollers.
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CHAPTER 10 TROUBLESHOOTING 15. 16. Faulty leading edge registration 17. Cause/Problem area Original Procedure Check Result Action 1 Is the original set correctly? No Set the original correctly. Copy paper 2 Is copy paper recommended by Canon being used? No Pick-up roller 3 Is the pick-up roller soiled by paper dust, etc.
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CHAPTER 10 TROUBLESHOOTING 18. Blurred image Cause/Problem area Scanner drive cable Procedure Check Result Action 1 Does the cable overlap as it winds around the drive capstan while the scanner is moving? Is the tension of the cable alternately too slack and too tight? Does the scanner move smoothly when it is pushed gently by hand? Yes Is the gear of the scanner drive system missing? Does the blurring occur at intervals of approx. 95mm? Yes 1.Re-tension the cable. 2.
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CHAPTER 10 TROUBLESHOOTING 20. Unsharp (Unforcussed) image Cause/Problem area Original Procedure Copyboard glass Lens drive assembly Mirror position Check Result Action 1.Check if the copyboard copy is wrapped. 2.Explain to the user how to place the original on the copyboard. Clean the copyboard glass. Check the lens drive unit. Adjust the distance between the No.1 mirror mount and the mirror 2 mount. Clean the scanning lamp, reflectors, mirrors, lens, and dust-proofing glass.
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CHAPTER 10 TROUBLESHOOTING 22. Black image Cause/Problem area Procedure 1 10-36 Check Does the scanning lamp go ON during copying? COPYRIGHT © 1999 CANON INC. Result Action No Check according to "Scanning lamp does not go ON." CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING IV. OPERATION TROUBLESHOOTING A. 1. Troubleshooting of Malfunction "E000, E003 and E004" indication Cause/Problem area Thermistors 2. Check Result 1 Cancel the indication. Open the front cover and delivery assembly door; then, insert a door switch actuator into the door switch, and wedge paper into the delivery paper sensor. Does the fixing roller heater go ON immediately after power is switched ON? (Check visually.
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CHAPTER 10 TROUBLESHOOTING 4. "E202" indication Cause/Problem area Check Procedure 1 Set the power switch OFF, remove the copyboard glass, and move the scanner fully to the right manually. Switch the power ON. Does the scanner reverse? Set the power switch OFF and move the scanner fully to the left manually. Switch the power ON.
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CHAPTER 10 TROUBLESHOOTING 7. "E220" indication Cause/Problem area Scanning lamp (LA1) Lamp regulator DC controller PCB 8. Procedure Check Result Action Refer to the sub-section "Scanning lamp does not light." Replace the DC controller PCB. Replace the lamp regulator. 1 Check the scanning lamp (LA1) does not light when copying. Yes 2 Check if the scanning lamp (LA1) lights when copier is in standby.
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CHAPTER 10 TROUBLESHOOTING 9. "E400" indication Cause/Problem area Circuit breaker (CB2) Procedure Result Action End. (Check the wiring between the DC controller and the ADF controller.) End. (Be sure to determine why CB2 went OFF.) Check from step 6.
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CHAPTER 10 TROUBLESHOOTING 10. "E500" indication Cause/Problem area Wiring Circuit breaker (CB1) Procedure Action Yes End. (Check the wiring between the DC controller PCB and the sorter controller PCB.) End. (Be sure to determined the reason why CB1 tripped.) Check from step 6 No Replace the fuse Yes Replace the sorter power supply PCB. Check the wiring between the sorter power supply PCB and the AC driver PCB.
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CHAPTER 10 TROUBLESHOOTING 11. "E802" (main switch auto shut-off mechanism) Cause/Problem area Main switch (SW1) Wiring Control panel PCB Wiring DC controller PCB 10-42 Procedure 1 2 3 4 Check Try operating the main switch by hand. Does it operate normally? Check the wiring from the DC controller PCB (J316-1 and -2) to the control panel.
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CHAPTER 10 TROUBLESHOOTING 12. AC power is not supplied Cause/Problem area Power plug Door switches Line power Procedure Check Result Action 1 2 Is the power cord plugged into the outlet? Are the front door and the delivery assembly closed completely? Is line voltage being supplied to the power outlet? No No Is line voltage present between J1-1 and J1-2? Check the voltage between J101 and J102. Is the voltage standard? Yes Plug it in. Close the door and the delivery assembly.
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CHAPTER 10 TROUBLESHOOTING 13. DC power is not supplied Cause/Problem area Overcurrent protection circuit AC power supply Short connector Procedure Check Result Action 1 Does the problem disappear when the copier is switched OFF and the ON again? Yes 2 Is AC line voltage present between terminals J103-1 and J103-2? Are the following connector pins connected properly? J100-4 and J100-5, J100-1 and J100-2 Has a fuse (F100) on the power supply assembly blown? No End.
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CHAPTER 10 TROUBLESHOOTING 14. Drum does not rotate Cause/Problem area Drum unit Torque limiter Drive belt Drum drive unit Check Procedure 1 2 3 Is the drum unit properly installed? Is copy paper or foreign matter jammed between the drum and the cleaning unit? Is the drive belt installed correctly? Result Action No Yes Insert properly. Remove the foreign matter. Install the belt correctly. Remove and check the drum drive unit. Repair or replace the unit. No Yes 15.
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CHAPTER 10 TROUBLESHOOTING 16. Paper is not picked up from multifeeder Cause/Problem area Sensor arm Pre-registration paper sensor (Q2) Multifeeder solenoid (SL3) Procedure 1 2 3 4 Gears 5 DC controller PCB Result Check Action Is the arm of the pre-registration paper sensor (Q2) broken? Does it move smoothly? Is the pre-registration paper sensor (Q2) functioning normally? No Replace the sensor arm. No Replace pre-registration paper sensor (Q2). Disconnect J311 on the DC controller PCB.
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CHAPTER 10 TROUBLESHOOTING 18. Scanner does not move Cause/Problem area Drive cable Procedure 1 Check Result Action Is the scanner drive cable installed correctly? Switch the copier OFF, hold the back of the scanner and move it back and forth. Does it move smoothly? No Install the cable correctly. Check for dirt or foreign matter on the scanner rails or some object that is touching the scanner. If necessary, clean, lubricate or repair.
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CHAPTER 10 TROUBLESHOOTING 19. Pre-exposure lamp does not light Cause/Problem area Pre-exposure lamp PCB DC controller PCB Procedure Check Result Action 1 Set the meter to the DC 30V range. Connect the leads to J307-1 (+) and J307-2 (-). Press the Start key. Is the voltage approx. 24V? Yes Replace the pre-exposure lamp PCB. Replace the DC controller PCB. No 20. Scanning lamp does not light Cause/Problem area Lamp Thermal fuse (FU2) Procedure Check Result Action Re-installed the lamp.
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CHAPTER 10 TROUBLESHOOTING 21. Fixing roller heater does not operate Cause/Problem area Procedure Check Result 1 Disconnect connector J106 (3P) from the AC driver/DC power supply PCB. Set the meter to the 1kΩ range. Connect the leads to J106-1 and J106-3. Does the needle move? Remove the fixing assembly. Connect the leads to both ends of thermoswitch (F1). Does the needle move? Yes Go to step 3. No Connect the leads to the heater terminals. Does the needle move? No Replace the thermoswitch (F1).
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CHAPTER 10 TROUBLESHOOTING 22. Lens does not move Cause/Problem area Lens solenoid (SL2) Procedure Check Result Action 1 Switch the power OFF and remove the rear cover. Set the power switch ON. Does the lens solenoid (SL2) go ON? No Lens drive cable pulley, Rails 2 No Scanner motor (M2) Power supply assembly DC controller PCB 3 Switch the power OFF. Move the lens in the ENLARGEMENT and REDUCTION directions by hand. Does the lens move smoothly? See step 4 of "Scanner does not move.
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CHAPTER 10 TROUBLESHOOTING 24. indicator does not go ON Cause/Problem area Cassette size sensor PCB Multifeeder paper sensor (Q1) Cassette paper sensor (Q7) Control panel DC controller PCB 25. Check Result Action Check the wiring from the DC controller PCB to the cassette size sensor PCB. If it is normal, replace the cassette size sensor PCB. Check the wiring from the DC controller PCB to Q1 or Q7. If it is normal, replace Q1 or Q7.
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CHAPTER 10 TROUBLESHOOTING 26. 8 indicator does not go ON Cause/Problem area Procedure Check Result 1 Does the copying operation stop when a jam occurs? Are the following sensors functioning normally? (See p. 10-20.) • Pre-registration paper sensor (Q2) • Delivery paper sensor (Q8) Does the trouble disappear when the control panel is replaced? Yes Continue from step 3. No Yes Replace the jam sensor. Replace the DC controller PCB. Yes No End. Replace the DC contorller PCB.
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CHAPTER 10 TROUBLESHOOTING 29. indicator does not go OFF when there is toner during black copying Cause/Problem area DC controller PCB Procedure Check Result Action 1 Does the indicator come back ON when the power switch is set OFF, and then ON again? Turn the power OFF, and disconnect J39.
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CHAPTER 10 TROUBLESHOOTING 31. indicator does not go OFF Cause/Problem area Control Card unit power supply Operation Card Card sensor PCB Controller PCB Controller PCB Wiring Procedure Check Result Action Disconnect the shorting. Either 24VDC or GND is not connected to the control card unit. Explain to the user that the indicator will not go OFF unless a card other than a department card is inserted. Continue with step 7.
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CHAPTER 10 TROUBLESHOOTING V. TROUBLESHOOTING FEEDING PROBLEMS A. [1] [2] [3] [4] Paper Jams The main areas in this copier where jams could occur are as follows: Paper pick-up area Separation and feeder area Fixing and delivery assembly area Drum cleaner area Troubleshooting of paper jamming is described here for each of the above areas. [3] [4] [2] [1] Figure 10-501 10-56 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING 1. Jamming in the paper pick-up area Cause/Problem area Cassette Procedure Check Result Action 1 2 Is the cassette pushed fully into the copier? Does the problem disappear when a different casssette is used? No Yes Copy paper 3 Is the copy paper curled or creased? Yes DC controller PCB, Pick-up roller clutch Pick-up roller 4 Does the pick-up roller rotate during the copying cycle? No Push the cassette in fully. 1.Check the paper holddown tabs. 2.
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CHAPTER 10 TROUBLESHOOTING 2. Jamming in the separation and feeder assembly area Cause/Problem area Procedure 1 Registration roller clutch (CL1) Registration roller Check Result Does the leading edge of the copy paper pass through the registration rollers? Does the registration roller clutch (CL1) operate correctly? Yes Continue with step 5. No Check the registration roller clutch (CL1).
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CHAPTER 10 TROUBLESHOOTING 3. Jamming in the fixing and paper delivery assembly area Delivery assembly Cause/Problem area Delivery assembly separation claws Procedure Upper and lower fixing rollers Paper guide plate Action 1.Replace the separation claws. 2.If the separation claws are dirty, clean them with MEK. Replace the upper and lower fixing rollers (both at the same time). Clean the paper guide plate with MEK. Adjust the height of the paper guide plate. Adjust the nip width.
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CHAPTER 10 TROUBLESHOOTING VI. INCORRECT PAPER FEED OPERATION 1. Copy paper Cause/Problem area Cassette Procedure Check Result Action 1 Is the copy paper positioned correctly under the hold-down tabs? Push the copy paper down in the cassette and release it. Does it rise smoothly? No Is paper recommended by Canon being used? No Set the copy paper correctly. 1.Check the width of the copy paper. 2.Check the position of the side panels of the cassette. 3.
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CHAPTER 10 TROUBLESHOOTING 2. Wrinkles Cause/Problem area Pick-up assembly Procedure Check Result Action 1 Switch the power OFF while the copy paper is passing along the feeder. Are there any wrinkles in the copy paper at this point? Is the paper skewed? Does the trouble disappear when new copy paper is used? Yes Is any foreign matter such as toner adhering to the paper guide? Is the height of the paper guide correct? Is the roller pressure (nip width) within the standard? Yes 1.
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CHAPTER 10 TROUBLESHOOTING VII.FUNCTION AND ARRANGEMENT OF THE ELECTRICAL PARTS A. Sensors, Fuses and Lamps Q4 Q3 LA1 Q1 Q5 FU2 Q6 Q2 Q7 TS1 LA731~LA738 TH2 TH1 Q8 Figure 10-701 Symbol Name Black toner level sensor Photointerrupter Thermistor Thermoswitch Lamp 10-62 COPYRIGHT © 1999 CANON INC.
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CHAPTER 10 TROUBLESHOOTING B. Clutches, Solenoids, Fans, Motors and Heaters CL1 SL4 H1 FM2 M3 SL3 M2 FM1 SL2 SL3 SL1 M1 Figure 10-702 Symbol Name Clutch Code CL1 Function Registration roller clutch Solenoid SL1 SL2 SL3 SL4 M1 M2 M3 FM1 FM2 LA1 Pick-up roller clutch solenoid Lens drive solenoid Multifeeder solenoid Blank solenoid Main motor Scanner motor Mirror motor Scanner cooling fan Exhaust fan Fixing roller heater CL SL M Motor Fan unit Heater COPYRIGHT © 1999 CANON INC.
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CHAPTER 10 TROUBLESHOOTING C. Switches, Circuit Breakers, Counters, Etc. SW1 SW2 DS1 CNT1 F1 Figure 10-703 Symbol CNT 10-64 Name Switch Microswitch Thermoswitch Code SW1 SW2 DS1 F1 Counter CNT1 COPYRIGHT © 1999 CANON INC. Function Power switch Cassette size sensor Front door switch Fixing assembly over temperature protector Total counter CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING D. PCBs [11] [6] [10] [4] [8] [3] [9] [5] [2] [1] [7] Figure 10-704 Symbol [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] Name DC controller PCB Power supply assembly AE sensor PCB Lamp regulator PCB High voltage transformer PCB Control panel PCB DC power supply PCB (for sorter) DC power supply PCB (for ADF) Noise filter PCB Copy density volume PCB Power indicator PCB COPYRIGHT © 1999 CANON INC.
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CHAPTER 10 TROUBLESHOOTING VIII. SERVICE MODE A. Outline The NP6317's service mode allows the following: • checking the operation of some switches and LEDs • changing data in EEPROM • operating some functions B. Using the Service Mode 1) 2) 3) 4) 5) Detach the VR cover from the rear of the left cover. Check that the COPY START key is glowing green. Press the service switch (SW300) on the DC controller PCB. Check that 'C0' is indicated. Enter the No.
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CHAPTER 10 TROUBLESHOOTING C. Guide to Service Mode C1 C2 C3 C4 C5 C6 C7 SERVICE PROGRAMS Function Auto exposure sensor monitoring. Auto exposure adjusting. Register A-side adjusting. Blank A-side adjusting. Curve adjusting. Register B-side adjusting. Blank B-side adjusting. Lens focus 50% adjusting. 0 to 50 0 to 63 0 to 63 0 to 63 0 to 63 0 to 63 0 to 65 C8 Lens focus 200% adjusting. 0 to 65 C9 Fuser temperature adjusting. C10 Lens home-position sensor adjusting.
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CHAPTER 10 TROUBLESHOOTING Size No cassette A4 A3 A4 R A5 R Universal code 0 8 12 14 15 7 Table 10-802 Size B4 B5 B5 R LETTER LETTER R LEGAL STMT R Code 0 1 2 3 4 5 6 Table 10-803 10-68 COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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CHAPTER 10 TROUBLESHOOTING IX. SELF DIAGNOSIS The DC controller PCB has a microprocessor that diagnoses the functions of the copier (particularly the sensors) at appropriate intervals. If this microprocessor detects an abnormality, it will display the type of the abnormality on the indicator on the control panel. The table below shows the various fault codes, their meaning, and the corresponding detection timing. Example of E000 code indication: Eó000 light alternately.
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CHAPTER 10 TROUBLESHOOTING Code displayed E202 E208 E210 E220 E245 E261 E400 E500 E802 10-70 Main cause Scanner home position sensor (Q5), scanner motor (M2), or DC controller PCB Mirror error: Mirror home position sensor (Q4), mirror motor (M3), DC controller PCB Lens home position sensor (Q6), DC controller PCB Lamp drive unit, Scanning lamp (LA2) DC controller PCB Fault criteria 1. If the scanner is not at the home position (SCHP=0) when the COPY START key is pressed.
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CHAPTER 10 TROUBLESHOOTING Note: After self diagnosis has been executed, the copier may be reset by switching if OFF and then ON unless 'E000', 'E001', 'E002', 'E003' or 'E004' is indicated on the display. This consideration is made to prevent the user from resetting the copier when the fixing assembly has a serious fault (open thermistor or others) that can damage the assembly. Reset the copier as follows if 'E000', 'E001', 'E002', 'E003' or 'E004' is indicated: 1) Detach the switch cover (one screw).
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APPENDIX A. GENERAL TIMING CHART ........ A-1 B. LIST OF SIGNALS/ ABBREVIATIONS ....................... A-3 COPYRIGHT © 1999 CANON INC. C. GENERAL CURCUIT DIAGRAM ................................... A-5 D. SOLVENTS AND OILS LIST ....... A-7 CANON NP6317 REV.0 APR.
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A.
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(A4, 2 copies, multifeed) COPY START key ON INTR Sequence 1 Main motor (M1) Scanner cooling fan Pre-exposure lamp 2 Fixing roller heater (LA1) 3 Primary/Transfer corona assembly 4 Developing DC component 5 Developing AC component 6 Scanning lamp (LA2) 7 Scanner home position sensor (Q5) signal 8 Grid bias ON/OFF 9 Scanner motor (M2) CW SCFW SCRV SCFW SCRV LSTR CCW 10 Registration roller clutch (CL1) 11 Pre-registration paper sensor (Q2) signal 12 Delivery paper senso
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APPENDIX B. LIST OF SIGNALS/ABBREVIATIONS The following is a list of signals and abbreviations used in this document and the circuit diagrams: Note: The abbreviations in parentheses are electrical signals but are analog, which cannot be expressed in terms of '1' and '0'. Others are digital signals, which can be expressed as being either '1' or '0'.
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C.
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APPENDIX D. SOLVENTS AND OILS LIST No. Name 1 Alcohol 2 Lubricant COPYRIGHT © 1999 CANON INC. Uses Cleaning; e.g., glass, plastic, rubber (external covers). Driving parts, friction parts (lead cam) Composition Remarks Fluorine-family • Do not bring near fire. hydrogen carbon, • IPA (isopropyl alcohol) alcohol, surface activating agent • FY9-6008 (10g) Silicone oil CANON NP6317 REV.0 APR.
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Prepared by Office Imaging Products Technical Support Department 3 Office Imaging Products Technical Support Division Office Imaging Products Quality Assurance Center CANON INC. Printed in Japan REVISION 0 (APR. 1999) (18756) 5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501 Japan COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR.
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This pubication is printed on 70% reprocessed paper. PRINTED IN JAPAN (IMPRIME AU JAPON) 0499AB0.