SERVICE MANUAL REVISION 0 FEB. 1998 COPYRIGHT © 1998 CANON INC. FY8-13F4-000 CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
IMPORTANT THE INFORMATION CONTAINED HEREIN IS PUBLISHED BY CANON, INC., JAPAN, AND IS FOR REFERENCE USE ONLY. 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. COPYRIGHT © 1998 CANON INC.
Introduction This Service Manual provides basic facts and figures you will need to service the plain paper copier NP6621 in the field. The NP6621 is designed to enable automated copying work and may be configured with the following accessory; for servicing information on the sorter, ADF, and control card, see their respective Service Manuals: 1. Cassette Feeding Module-B2 2. Cassette Feeding Module-A2 3. Cassette Feeding Unit-K1 4. Paper Deck Pedestal-K1 5. Control Card IV N 6. ADF-E1 7. RDF-F1 8.
Introduction RDF-F1 (Recirculating Document Feeder) Automatically feeds a set of up to 100 originals to the platen glass for copying. The RDF can also turn over two-sided originals for automatic two-sided copying. MS-B1 (10 bins) Automotically sorts and groups sets of up to 10 copies. ADF-E1 (Automatic Document Feeder) Automatically feeds sets of up to 30 originals to the copyboard for copying. Control Card IV N Allows you to monitor the number of copies made by each card holder.
CONTENTS CHAPTER 1 GENERAL DESCRIPTION I. FEATURES ................................................ 1-1 II. SPECIFICATIONS ..................................... 1-2 A. Copier .................................................. 1-2 B. Cassette Feeding Module-B2/ Cassette Feeding Module-A2/Cassette Feeding Unit-K1 .................................. 1-5 C. Paper Deck Pedestal-K1 ..................... 1-6 III. NAMES OF PARTS ................................... 1-7 A. Exterior ....................................
C. Duplexing Unit ................................... 3-63 D. Pick-Up from the Cassette Feeding Module-A2 ......................................... 3-72 E. Pick-Up from the Cassette Feeding Unit-K1 ............................................... 3-74 F. Paper Deck Pedestal-K1 ................... 3-76 G. Multifeeder ......................................... 3-82 H. Identifying the Size of the Cassette ... 3-85 I. Fixing/Delivery Assembly .................. 3-87 J. Detecting Jams .............................
CHAPTER 6 MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS ....... 6-1 A. Periodically Replaced Parts ................ 6-1 II. DURABLES AND CONSUMABLES .......... 6-2 A. Copier .................................................. 6-2 B. Cassette Feeding Module-B2, Cassette Feeding Module-A2, and Cassette Feeding Unit-K1 ............ 6-3 C. Paper Deck Pedestal-K1 ..................... 6-3 III. BASIC SERVICING ................................... 6-4 IV. SERVICING CHART ................................
vi COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
CHAPTER 1 GENERAL DESCRIPTION I. FEATURES ................................................ 1-1 II. SPECIFICATIONS ..................................... 1-2 A. Copier .................................................. 1-2 B. Cassette Feeding Module-B2/ Cassette Feeding Module-A2/Cassette Feeding Unit-K1 .................................. 1-5 C. Paper Deck Pedestal-K1 ..................... 1-6 III. NAMES OF PARTS ................................... 1-7 A. Exterior ............................................
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
GENERAL DESCRIPTION I. FEATURES When fitted with options, it provides a maximum of four paper sources. 1. Multiple front loading and multifeeder for space saving. • The cassette may be slid out to the front for paper supply work. • With the adjustable cassette and the multifeeder, various types of paper may be used. 2. Office conveniences and ecology. • The copier is designed compact, enabling effective use of office space.
GENERAL DESCRIPTION II. SPECIFICATIONS A. Copier 1. Configuration Specifications Item Body Desktop Copyboard Fixed Light source Halogen lamp Lens Zoom lens Photosensitive medium OPC 2.
GENERAL DESCRIPTION 3. Performance Item Specifications Sheet, book, 3-D object (2 kg/2.204 lb. max.) Maximum original size A3 (297 x 420 mm) Reproduction ratio DIRECT, 2R2E (Table 1-1); zoom between 49% and 204% (fine zooming provided) Wait time 30 sec First copy time 9.7 sec (approx.; A4, DIRECT, non-AE, cassette 1) Continuous copying 100 copies (max.; upper limit may be changed in service mode) Copying speed See Table 1-202.
GENERAL DESCRIPTION 4. Others Item Operating environment Specifications Temperature 7.5° to 32.5°C/45.5 to 90.5°F Humidity 5% to 85% Atmospheric pressure 810.6 hPa to 10313.3 hPa (0.8 to 1 atm) Serial numbers Power supply 230 V (50Hz) QBSxxxxx, UDNxxxxx, SBExxxxx, TBHxxxxx, UDPxxxxx Standby 0.042 kwh (reference only) Continuous copying 0.663 kwh (reference only) Copying 66 dB or less (1m front) Standby 40 dB or less (1m front) Power consumption Noise 0.
GENERAL DESCRIPTION Copy size Reproduction ratio DIRECT REDUCE ENLARGE 1: 1 (±0.5%) Q’ty A3 (297 × 420) 11 A4 (210 × 297) 21 A5 (148 × 210) 21 B4 (257 × 364) 12 B5 (182 × 257) 21 A4R (297 × 210) 16 A5R (210 × 148) 18 B5R (257 × 182) 18 1: 0.500 (+1.0%) A3 → A5R 20 1: 0.707 (+1.0%) A3 → A4R 15 B4 → B5R 17 1: 2.000 (+1.0%) A5R → A3 12 1: 1.414 (+1.0%) A4R → A3 12 B5R → B4 14 Table 1-202 Copying Speeds Specifications subject to change without notice. B.
GENERAL DESCRIPTION C. Paper Deck Pedestal-K1 Method of pick-up Clawless Loading method Front loading Type of paper Plain paper (64 to 80 g/m2), Colored paper* Size of paper A4 (landscape), B5 (landscape), LTR (landscape) Capacity 162 mm high (one side; equivalent of 1500 sheets of 80 g/m2 paper) Switching (size) Partitioning plate (incremental) Control panel No (use copier' s control panel) Display No (see copier' s display) Power supply 34 VDC, 24 V, 5 V (supplied by copier) Weight 31.
GENERAL DESCRIPTION III. NAMES OF PARTS 1 A. Exterior 7 2 6 5 3 4 q w e r t Front door y Control panel u Copyboard glass Copyboard cover Power switch Multifeeder Cassette Figure 1-301 1 6 2 5 3 4 r Static eliminator t Copy tray y Anti-condensation heater switch (rear) Fluorescent heater switch (front) Figure 1-302 q Body open/close lever w Copy density correction volume e Static eliminator cleaner COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
GENERAL DESCRIPTION B. Cross Section 1. Cross Section of the Body 1 23 q w e r t y u i 2 3 22 No. 3 mirror No. 2 mirror No. 1 mirror Scanning lamp Fixing unit Feeding assembly Copyboard glass Drum unit 4 6 5 7 8 10 9 11 13 12 20 21 o !0 !1 !2 !3 !4 !5 !6 Lens Primary charging roller Transfer roller No. 6 mirror Developing assembly No. 4 mirror No.
GENERAL DESCRIPTION 2. Cassette Feeding Module-A2 1 2 q Cassette 3 w Cassette 4 e Cassette 3 pick-up roller 3 4 5 6 r Cassette 4 pick-up roller t Drive roller y Feeding roller Figure 1-304 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
GENERAL DESCRIPTION 3. Cassette Feeding Unit-K1 1 2 3 9 q w e r t 8 y u i o Cassette 3 Cassette 4 Cassette 3 pick-up roller Cassette 4 pick-up roller Vertical path roller 4 4 6 5 7 Vertical path roller 3 Vertical path roller 5 Cassette 5 pick-up roller Cassette 5 Figure 1-305 1–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
GENERAL DESCRIPTION 4. Paper Deck Pedestal-K1 1 2 3 7 q w e r Deck pick-up roller Deck vertical path roller Vertical path roller 3 Deck feeding roller 6 5 4 t Deck separation roller y Lifter u Deck Figure 1-306 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
GENERAL DESCRIPTION 1–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
IV. BASIC OPERATION 1 2 4 3 5 7 8 6 9 10 11 12 13 15 14 16 17 18 20 21 19 24 22 25 23 A. Control Panel 26 Figure 1-401 q Sorter key w Two-sided key (left side) Press to set or cancel the Sort, Staple Sort, and Group modes. Sort mode: When copying a multi-page document, copies are automatically sorted into sets arranged in page order. * To use this mode, your copier must be equipped with the optional Stapler Sorter, Sorter, or ADF/RDF.
GENERAL DESCRIPTION 1–14 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
GENERAL DESCRIPTION w e q Figure 1-402 q Transparency Interleaving key Press to set or cancel the Transparency Interleaving mode. The interleaf sheets are printed with the same images as the transparencies. The interleaf sheets are left blank. w Two-page Separation/Image Combination key (left side) Copies facing pages in a bound original onto two copy sheets. 2 ON 1: Reduces two originals to fit on one side of a single copy sheet.
GENERAL DESCRIPTION B. Making Copies 1) Place your originals. a. Placing originals on the platen glass • Lift the platen glass cover. • Place your original on the platen glass. The surface that you want to copy must face down. Align the edge of the original with the → mark in the centre of the platen glass. • Gently lower the platen glass cover. 3) Press the key. a. After copying begins, you cannot change the number of copies, paper size, copy ratio or other copy settings. b.
GENERAL DESCRIPTION C. Using the Stack Bypass 1) Place your originals. You can place up to 50 sheets of copy paper (a stack approximately 5 mm high) in the stack bypass to be automatically fed into the copier. Use the stack bypass when you want to copy on special stock, such as transparencies or labels, or when the paper size that you want to copy on will not fit in a cassette. Note: Note the following points when using the stack bypass: a. Paper size: A5 (horizontal placement) to A3 b.
GENERAL DESCRIPTION 4) Adjust the slide guides to fit the size of the copy stock. Reference: 1. Be sure to adjust the slide guides to fit the size of the copy stock. 2. When feeding A4R or A3-size copy stock, pull out the auxiliary tray. 5) Align the required number of sheets of copy stock with the slide guides. The surface that you want to copy on must face up. Insert the copy stock into the copier until it stops. Notes: 1.
GENERAL DESCRIPTION 7) Press the D. User Mode key. If you set the Two-sided, Two-page separation, Overlay, Image Separation or Transparency Interleaving modes in step 1 for stack bypass feeding, and you have not selected the size of the paper to be fed, the Paper Size indicator flashes. 1 2 4 5 7 8 C 0 Figure 1-414 key to select the size of the paper to Press the be fed into the stack bypass. mm % Autom.Paper A4 A5 A5 R OK Autom.Zoom 1.
GENERAL DESCRIPTION 3. Auto Clear Time If the copier is not operated (no keys are pressed) for a certain period of time, the copier automatically returns to the standard copy settings. This time period is called the “Auto Clear Time.” You can cancel or freely change the Auto Clear Time. Auto Clear Time can be set from 1 to 9 minutes in one-minute increments. key. 1) Press the • “U01” appears in the Copy quantity/Copy ratio display. To continue setting other Additional Functions, press the 1 key.
GENERAL DESCRIPTION 5. Zoom Fine Adjustment • If there is a slight difference in size between the original and output copy images when the copy ratio is set to 100% (direct), use this function to correct the error. Adjustments can be made independently in the X (horizontal) and Y (vertical) directions. You can make adjustments from –1% to +1%, in 0.2% increments. keys to adjust the copy ratio for • Press the Zoom Fine Adjustment.
GENERAL DESCRIPTION 4) Make fine adjustments to the copy ratio in the X direction. ) to • Press the Exposure keys ( adjust the copy ratio. • The initial setting for Zoom Fine Adjustment is 0%. • If you make a mistake while entering a value, press the C key and then re-enter the value. 5) Press the key. • The fine adjustments to the copy ratio in the X direction are made.
GENERAL DESCRIPTION 7. Stack Bypass Size Entry ON/OFF • When making two-sided and overlay copies, etc. on copy paper placed in the stack bypass, you must specify the size of the paper. OFF: The “SELECT PAPER SIZE” display flashes and the stack bypass paper size key is pressed is specified when the only if necessary according to the set copy mode. ON: The “SELECT PAPER SIZE” display flashes and the stack bypass paper size is specified when copy paper is placed in the stack bypass.
GENERAL DESCRIPTION 4) Press the Number keys ( 1 , 0 ) to select Auto Sort ON/OFF. • The settings are displayed in the Copy quantity/Copy ratio display. • The initial setting for Auto Sort is ON. • If you make a mistake while entering a value, enter the correct value and it will replace the incorrect one that was previously entered, or press the C key and after the display clears, enter the correct value. key. 5) Press the • Auto Sort ON or OFF is set and “U06” is displayed.
GENERAL DESCRIPTION 11. Initializing User Mode • The settings that were changed in the Additional Functions mode can be restored to their initial settings. key. 1) Press the • “U01” appears in the Copy quantity/Copy ratio display. • Once you set the Additional Functions mode, the key turns red and copying operations cannot be initiated. 2) Press the 0 key twice. • If you make a mistake while entering a value, press either the key twice or press the C key and then press the key twice. key.
GENERAL DESCRIPTION V. WARNINGS AND ACTIONS A. Jam Indicator 1. When q Flashes on the Control Panel 1) Open the front door. Drum Figure 1-504 Figure 1-501 2) Lift the green lever on the left side to open the top of the main unit. Figure 1-502 3) Slowly remove any jammed paper, taking care not to tear it. • If a paper jam occurs in a location similar to that shown in the picture to the lower, slowly turn the green knob in the direction of the arrows and remove the jammed paper.
GENERAL DESCRIPTION • If a paper jam occurs in a location similar to that shown in the picture to the lower, slowly pull the paper out in the direction of the arrows, taking care not to tear it. 4) Gently close the top of the main unit. Figure 1-509 Figure 1-505 5) If a paper jam occurs while using the stack bypass, remove paper placed there and then gently remove any paper jammed in the stack bypass so that it does not tear.
GENERAL DESCRIPTION 7) Place your finger on the inner guide. • Push the inner guide down towards you and gently pull out any jammed paper so that it does not tear. Figure 1-512 • After inspecting all areas that appeared on the control panel, and removing all jammed paper, close the front door. If the Sorter/Stapler Sorter (options) is attached, after closing the main unit, return the Sorter/Stapler Sorter to its original position.
GENERAL DESCRIPTION 2) Open the right door of the cassette. • Place your finger on the green finger grip and pull open the inner guide for the copier main unit cassette. If the Cassette Feeding Module or Paper Deck (options) is attached, open both doors. 4) If you cannot clear the paper jam after following steps ➊ and ➋, then pull out the cassette. Note: If you cannot see the cassette because the front door is in the way, close the front door.
GENERAL DESCRIPTION 7) After inspecting all jam location areas that appeared on the control panel, and removing any jammed paper, close the front door. If a paper jam occurred while using the ADF/ RDF (options), after clearing the paper jam, place the first page of the original back in the key. The copier will ADF/DRF and press the make the remaining copies. 2) If the indicator e lights, close the Stapler Sorter cover and return the Sorter/Stapler Sorter to its original position.
GENERAL DESCRIPTION 4. If Flashes (Replacing the Toner Cartridge) • If the toner has run low, the Replace Toner Cartridge indicator ( ) will flash. Follow the procedure described below and replace the used toner cartridge with a new one. 1) Open the front door. Note: Do not lift the green lever on the left side to open the top of the main unit. Some toner may spill out of the toner cartridge opening. Lever Figure 1-530 Figure 1-531 Figure 1-529 3) Prepare a new toner cartridge.
GENERAL DESCRIPTION 5) Set the new toner cartridge. • Gently insert it into the copier as far as it will go. • Make sure that the toner cartridge is inserted all the way into the copier. Figure 1-536 8) Securely close the front door. • You cannot close the front door until the main unit is closed. • You cannot operate the copier if the front door is open. Figure 1-534 6) Pull the toner cartridge sealing tape off.
GENERAL DESCRIPTION B. Cleaning the Static Charge Eliminator 1) Open the front door. • Remove any originals that have been placed on top of the copier so that they do not fall off when you open the main unit. 2) Lift the green lever on the left side to open the top of the main unit. 3) With two fingers, grip the finger grip located on the front part of the static charge eliminator. Lift and pull out the static charge eliminator from the copier.
GENERAL DESCRIPTION VI. ROUTINE CLEANING Clean the following parts once a week or whenever copies appear dirty. Warning: 1. When cleaning the copier, first turn OFF the power switch and unplug the power plug. Failure to observe these items may result in fire or electrical shock. 2. Clean the copier using a firmly wrung-out cloth dampened with a mild cleansing detergent. Do not use alcohol, benzene, paint thinner, or other inflammable substances.
CHAPTER 2 COPYING PROCESS I. IMAGE FORMATION ................................ 2-1 A. Outline ................................................. 2-1 B. Latent Static Image Formation Block .. 2-2 C. Step 1 (pre-exposure) ......................... 2-3 D. Step 2 (primary charging) .................... 2-3 E. Step 3 (image exposure) ..................... 2-4 F. Step 4 (development) .......................... 2-4 COPYRIGHT © 1998 CANON INC. G. Step 5 (transfer) .................................. 2-5 H.
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
COPYING PROCESS I. IMAGE FORMATION A.
COPYING PROCESS The copier forms images through the following steps, and each of the steps functions as described below. B. Latent Static Image Formation Block step 1 step 2 step 3 step 4 step 5 step 6 step 7 step 8 The block consists of three steps; at the end of the block, areas of the drum corresponding to the black areas of the original are left with negative charges and the areas of the drum corresponding to the white areas of the original are rid of negative charges.
COPYING PROCESS ,,,, ||| yyyy zzz {{{{ ,,,, yyyy zzz {{{{ ||| ,,,, yyyy zzz {{{{ ||| {{{{ ||| C. Step 1 (pre-exposure) D. Step 2 (primary charging) Pre-exposure lamp Primary charging roller Figure 2-105 Figure 2-106 Before primary charging takes place, the light of the pre-exposure lamp is directed to the photosensitive drum to eliminate the residual charges on the drum, thereby preventing uneven density.
COPYING PROCESS E. Step 3 (image exposure) Optical image F. Step 4 (development) Toner Blade Cylinder Magnet Dark Developing cylinder Light area Figure 2-108 Figure 2-107 In this step, the optical image of an original is projected on the photosensitive drum to neutralize the charges in the light areas. As shown in Figure 2-108, the developing assembly consists of a fixed magnet, a cylinder that rotates around the magnet, and a rubber blade.
COPYING PROCESS An AC bias and DC bias (negative component) are applied simultaneously* to the developing cylinder and the blade. * Termed development bias, whose negative component is larger than that of the positive component. G.
COPYING PROCESS Reference: If the image on the photosensitive drum fails to transfer to copy paper because of a jam or the like, the transfer charging roller could become soiled with toner. To prevent such a problem, the copier uses a positive transfer voltage when the scanner is moving in reverse or during post rotation, thereby returning the positively charged toner on the transfer roller to the photosensitive drum. H.
COPYING PROCESS I. Step 7 (fixing) J. Step 8 (drum cleaning) Oil application roller Cleaning blade Upper fixing roller Tungsten-halogen heater (900W) Toner Blade Scoop-up sheet Copy paper Figure 2-115 Lower fixing roller Figure 2-114 In this step, the copy paper is pressed between two heated rollers to make the toner image permanent.
COPYING PROCESS II. AUXILIARY PROCESS A. Blank Exposure Blank exposure is executed to remove the drum surface potential of the non-image area that occurs as a result of the difference among copy sizes or when making copies in Reduce mode. The light from the pre-exposure lamp is reflected by the reflecting plate and directed to the photosensitive drum.
CHAPTER 3 OPERATIONS AND TIMING 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 service person’s work and, therefore, are left out of the discussions.
I. Fixing/Delivery Assembly .................. 3-87 J. Detecting Jams .................................. 3-92 V. POWER SUPPLY .................................. 3-101 A. Outline of Power Distribution ........... 3-101 B. Power Supply Circuitry .................... 3-102 C. Detecting Errors on the Power Supply PCB ................................................. 3-103 D. Protection Mechanisms for the Power Supply Circuit .................................. 3-104 VI. SERVICE MODE .............................
OPERATIONS AND TIMING I. BASIC OPERATIONS A. Functional Construction The machine can be divided into four functional blocks: pick-up/feeding system, exposure system, image formation system, and control system.
OPERATIONS AND TIMING B. Outline of Electrical Circuitry The machine’s most electrical mechanisms are controlled by the microprocessor on its DC controller PCB. The microprocessor reads the input signals from the sensors and operation keys according to DC controller PCB its pre-programmed instructions and sends signals to drive such loads as motors, solenoids, and lamps as necessary. The machine’s microprocessor is capable of reading analog signals as well as digital signals using its A/D converter.
OPERATIONS AND TIMING C. Inputs to the DC Controller 1. Inputs to the DC Controller PCB (1/5) DC controller PCB Scanner home position sensor PS 1 5V J 315B- 3 -4 SCHP -5 PS 2 J 310A- 3 -2 -1 PS 3 J 315A- 6 -5 -4 PS 4 J 309- 7 -8 -9 PS 5 J 316- 11 - 10 -9 PS 6 J 316- 12 - 13 - 14 PS 7 J 316- 5 -4 -3 PS 8 J 309- 15 - 14 - 13 PS 10 J 309- 10 - 12 - 11 When the scanner is at home position, '1'.
OPERATIONS AND TIMING 2. Inputs to the DC Controller (2/5) DC controller 5V Copyboard cover sensor J 310A- 12 - 11 PS 11 - 10 CVOP When the copyboard cover is open, '1'. (when the light-blocking plate is at PS24) 5V Vertical path roller 2 paper sensor J 309- 6 -5 PS 12 VP2P When PS12 detects paper, '1'. -4 5V Cassette 2 paper sensor J 309- 1 -3 PS 13 -2 CPD2* When paper is present in the cassette, '0'. (when the light-blocking plate is not at PS13, '0').
OPERATIONS AND TIMING 3. Inputs to the DC controller (3/5) DC controller Original size sensor 2 PS 21 J 310B- 8 -7 -9 SIZE2 Varies according to paper size. 5V Original size sensor 1 PS 23 J 310B- 2 -1 -3 SIZE1 Varies according to paper size. Figure 3-105 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING 4. Inputs to the DC Controller PCB (4/5) DC controller PCB AE sensor (1/2) Cassette size sensor 1 J 601 -1 -2 -3 -4 J 310A -9 -8 -7 -6 J 651 -6 -5 -4 -3 -2 -1 J 318 -1 -2 -3 -4 -5 -6 J 801 J 802 J 803 Control panel AE AEREF See p. 3-48. CS CSZ1 CSZ2 CSZ3 CSZ4 J 305 J 306 J 316B -6 -7 -8 VR1 J 324A -1 Main thermistor (TH1) See p. 3-85. Keys and LEDs are wired in the form of a matrix on the control panel PCB, and the DC controller turns on the LEDs and reads key inputs.
OPERATIONS AND TIMING 5. Inputs to the DC Controller PCB (5/5) Service switch PCB DC controller PCB Service switch SRSW When the switch turns on, '0'. (starts service mode) SW850 +5V Density correction volume J306-7 -8 CDC Adjusts the developing DC bias -9 VR850 AE sensor adjustment volume AEVR2 AEVR1 VR851 AE sensor (2/2) Figure 3-107 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING D. Outputs from the DC Controller 1. Outputs from the DC Controller PCB (1/5) Main switch ON Door switch DC controller PCB Cassette heater (H4) Drum heater (H3) Cassette heater (H5) Composite power supply PCB +5V Anti-condensation switch (SW1) RL101 EHTRL* When '0' RL101 turns ON. (ON when the power is OFF) Lens heater (R1) When RL101 is ON and SW1 is ON, the heater (R1, R2) turns ON. Lens heater (R2) 24V RL103 Fuse (FU1) Fixing heater (H1) When '0', RL103 turns ON.
OPERATIONS AND TIMING 2. Outputs from the DC Controller PCB (2/5) DC controller PCB +24V Registration clutch J312A- 5 -6 CL1 RGCLD* When '0', the registration clutch turns ON. (registration roller rotates) +24V Cassette 1 pick-up clutch J312A- 3 -4 CL2 PUCLD1* When '0', the pick-up clutch turns ON. (pick-up roller rotates) +24V Multifeeder pick-up clutch J312A- 1 -2 CL3 When '0', the pick-up clutch turns ON.
OPERATIONS AND TIMING 3. Outputs from the DC Controller PCB (3/5) DC controller PCB Duplexing unit motor J326- 1 -2 -3 -4 -5 -6 M5 COM A COM B A A* B B* While M5 is rotating, alternates between '1' and '0. (pulse signal) Figure 3-110 3–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING 4. Outputs from the DC Controller PCB (4/5) DC controller PCB +24V Change solenoid SL1 J324B- 7 -8 SL2 J312B- 7 -8 SL3 J315A- 8 -7 SL4 J324A- 8 -7 SL5 J316- 2 -1 SL6 J324B- 3 -4 SL 8 J320- 5 -4 CHSLD* When '1', the solenoid turns OFF. (blanking shutter width control) When '0', the solenoid turns ON. (lens mount moved) +24V Multifeeder holding plate solenoid MFSLD* When '0', the solenoid turns ON.
OPERATIONS AND TIMING 5. Outputs from the DC Controller PCB (5/5) DC controller PCB +24V J 310A- 4 Scanner cooling fan (FM2) -5 When '0', the Scanner cooling fan turns ON. FM2D (Scanner cooling fan rotates) +24V J 315B- 2 Heat exhaust fan (FM1) -1 HEFD* When '0', the heat exhaust fan turns ON. (heat exhaust fan rotates) +24V J 314A- 7 Feeding fan -8 (FM4) Power supply cooling fan (FM3) +24V J12-4 -3 PSCFD Composite power supply PCB -2 J 401 -1 FDFD* When '0', the feeding fan turns ON.
OPERATIONS AND TIMING E. Inputs to and Outputs from the Cassette Feeding Module-B2 Driver PCB 1. Inputs to and Outputs from the Cassette Feeding Module-B2 Driver PCB (1/1) Cassette driver PCB DC controller PCB 5V J 110- 1 Cassette 3 vertical path sensor -3 PS1cu C3VPD -2 When PS1 detects paper, '1'.
OPERATIONS AND TIMING F. Inputs to and Outputs from the Cassette Feeding Module-A2 Driver PCB 1. Inputs to and Outputs from the Cassette Feeding Module-A2 Driver PCB (1/2) DC controller PCB Cassette driver PCB 5V J 110- 1 Cassette 3 vertical path sensor -3 PS1cu C3VPD -2 When PS1cu detects paper, '1'. (when the light-blocking plate is at PS1cu, '1') 5V J 110- 4 Cassette 3 paper sensor -5 PS2cu C3PD* -6 When paper is present in the cassette, '0'.
OPERATIONS AND TIMING 2. Inputs to and Outputs from the Cassette Feeding Module-A2 Driver PCB (2/2) Cassette driver PCB DC controller PCB +24V Cassette 3 pick-up clutch CL1cu When '0', the pick-up clutch turns ON. C3PUCLD* (pick-up roller rotates) J 125- 1 -2 +24V Cassette 4 pick-up clutch Cassette unit motor CL2cu M1cu When '0', the pick-up clutch turns ON.
OPERATIONS AND TIMING G. Inputs to and Outputs from the Cassette Feeding Unit-K1 Driver PCB 1. Inputs to and Outputs from the Cassette Feeding Unit-K1 Driver PCB (1/3) DC controller PCB Cassette feeding unit driver PCB 5V J 110- 1 Cassette 3 vertical path detection -3 PS1cu C3VPD -2 When '1', paper is present at the sensor. (the light-blocking plate is at the sensor) 5V J 110- 4 Cassette 3 paper detection -6 PS2cu C3PD* -5 When paper is present in the cassette, '1'.
OPERATIONS AND TIMING 2. Inputs to and Outputs from the Cassette Feeding Unit-K1 Driver PCB (2/3) Cassette feeding unit driver PCB Cassette 3 size detection PCB Cassette 4 size detection PCB Cassette 5 size detection PCB J 218 -6 -5 -4 -3 -2 -1 J 110 -7 -8 -9 - 10 - 11 - 12 J 228 -6 -5 -4 -3 -2 -1 J 120 -4 -5 -6 -7 -8 -9 J 238 -6 -5 -4 -3 -2 -1 J 130 -7 -8 -9 - 10 - 11 - 12 DC controller PCB CS3 C3SZ1 C3SZ2 C3SZ3 C3SZ4 See p. 3-85. CS4/CS5 C4SZ1/C5SZ1 C4SZ2/C5SZ2 See p. 3-85.
OPERATIONS AND TIMING 3. Inputs to and Outputs from the Cassette Feeding Unit-K1 Driver PCB (3/3) Cassette feeding unit driver PCB DC controller PCB 24V Cassette 3 pick-up clutch J135 -1 CL1cu -2 C3PUCLD* When '0', CL1cu turns ON. 24V Cassette 4 pick-up clutch J135 -3 CL2cu -4 C4/5PUCLD* When '0', CL2cu/CL3cu turns on.
OPERATIONS AND TIMING 4. Inputs to Paper Deck-K1 Controller (1/2) Pedestal controller PCB Right door open sensor PS 5 5V J 111- 6 -5 RDOP* -4 PS 2 J 112- 3 -2 -1 PS 1 J 112- 6 -5 -4 PS 3 J 112- 9 -8 -7 PS 4 J 113- 3 -2 -1 PS 6 J 113- 10 -7 -8 When "0", right door is open. (light-blocking plate is not at PS5) 5V Deck vertical path roller paper sensor DVRPD When PS2 detects paper, "1". (light-blocking palate is at PS2) 5V Deck paper sensor DPD When paper is present in paper desk, "1".
OPERATIONS AND TIMING 5. Outputs from Paper Deck-K1 Controller (2/2) Pedestal controller PCB J221 -1 -2 Pedestal motor M1 J222 -5 -4 -3 -2 -1 34V J201 -1 -2 J109 -1 -2 -3 -4 -5 34V "1" or "0" depending on the type of copier, thereby changing revolution. PEDMD (output) When "1", pedestal motor is ON. LOCK (input) When "0", pedestal motor is error.
OPERATIONS AND TIMING H. Main Motor Control Circuit 1. Outline Figure 3-121 shows the circuit that controls the main motor (M1), and the circuit has the following functions: q Turns ON/OFF the main motor. w Controls the main motor to a specific speed. The main motor (M1) is a DC motor equipped with a built-in clock pulse generator. When the motor rotates, clock pulse signals (MMCLK*) are generated according to the revolution of the motor.
OPERATIONS AND TIMING I. Basic Sequence of Operations (2 copies, continuous, AE) Power switch ON Copy Start key ON WMUP WMUPR STBY INTR SCFW SCRV SCFW SCRV LSTR STBY AER Main motor (M1) Primary charging bias Transfer bias Static eliminator bias Scanning lamp Scanner Developing AC bias Developing DC bias Figure 3-122 3–22 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING Function Period Remarks WMUP (WarmUp) From switch on until the fixing roller temperature reaches 165°C for the black developer or 145°C for the CT Unit. (about 75 seconds at an ambient temperature of 20°C) Allows time for fixing roller to warm up. Warm-up time varies with fixing roller temperature at power ON. When the COPY START key is lighting green.
OPERATIONS AND TIMING J. Original Size Detection Control 1. Outline The machine offers auto paper selection, auto reproduction selection, reduction layout, and enlargement layout functions, all of which require the identification of the size of the originals being used.
OPERATIONS AND TIMING 2. Operations This method enables identification of the size of a black original. However, the sensor output levels will not change in the following cases: a. A3 black original b. book original (the thickness tends to prevent changes in the sensor level) When the copyboard cover is brought down to about 30° or less, the copyboard cover sensor (PS11) turns ON, i.e., the light-blocking plate blocks PS11.
OPERATIONS AND TIMING 3. Original Size Detection The size of an original is identified with reference to the presence/absence of an original at each sensor based on the sensor output combinations given in Table 3-102. • Level Does Not Change The sensor output when the copyboard cover is closed to from 15° to 30° and the sensor output 15 sec thereafter are the same (detecting an original).
OPERATIONS AND TIMING II. EXPOSURE SYSTEM B. Lens Drive System 1. Outline A. Varying the Reproduction Ratio The reproduction ratio in the axial direction of the photosensitive drum is varied by the lens drive system, and that in the peripheral direction of the photosensitive drum is varied by the scanner drive system.
OPERATIONS AND TIMING Lens motor (M3) Relay gear Change solenoid (SL1) SL1 'ON' (lens drive) SL1 'OFF' (blank exposure unit drive) Change solenoid (SL1) Lens motor (M3) Relay gear Lens cable Lens Enlargement Lens home position detection signal (LHP) Lens motor drive signal Cam groove Change solenoid drive signal (CHSLD*) Lens home position sensor (PS2) DC controller Figure 3-202 3–28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING 2. Lens Motor Drive Circuit The lens motor (M3) is a stepping motor and is rotated by the drive power supply signal LNSCA/ LNSCB and pulse signals LNSA/LNSA* and LNSB/ LNSB*. When the lens motor is rotating, the motor is being driven by 34 V to move the lens. Whenever the lens motor is at rest, 5 V is applied to the motor to ensure that the lens is kept at the appropriate position. In this condition, the motor is kept stationary by keeping LNSA, LNSA*, LNSB, and LNSB* all ‘0’. b.
OPERATIONS AND TIMING 3. Basic Sequence of Operations for the Lens Drive System (enlargement/ reduction) In enlargement/reduction mode, the lens is always returned to home position first before being moved to the appropriate position for the selected reproduction ratio. This is true when the ratio is reset to DIRECT.
OPERATIONS AND TIMING C. Scanner Drive System 1. Outline The scanner drive system is driven by the scanner motor (M2). The scanner motor changes the direction of its rotation, and its speed changes when moving the scanner forward to suit the selected reproduction ratio. However, its speed when moving the scanner in reverse remains constant (2.5 times as fast as when moving the scanner forward) regardless of the selected reproduction ratio.
OPERATIONS AND TIMING 2. Relationship between Scanner Sensors and Signals Scanner Scanner sensor Signal Description Forward PS1 Scanner home position sensor SCHP Reverse Registration clutch ON ▼ Scanner reverse OFF 0.1 sec later ▲ Table 3-201 Reference: The timing at which the registration clutch is turned ON is determined in relation to when the Copy Start key is pressed or when the scanner is moved forward. 3.
OPERATIONS AND TIMING 4. Driving the Scanner Motor a. Outline The scanner motor is a 4-phase control stepping motor. It is turned ON/OFF and its direction and the speed of its rotation are chanceged by controlling the output timing of pulse signals SCA/ A* and SCB/B*. b. Operations The microprocessor (Q301) on the DC controller PCB receives such information as on the selected copying mode and reproduction ratio from the control panel circuit.
OPERATIONS AND TIMING D.
OPERATIONS AND TIMING • • • • • • III. IMAGE FORMATION SYSTEM A. Outline Controls the scanning lamp. Controls the primary charging. Controls the transfer charging. Controls the separation static eliminator. Controls the developing bias. Controls the blank exposure lamp.
OPERATIONS AND TIMING B. Sequence of Operations (image formation system) Power switch ON Copy Start key ON WMUP WMUPR STBY INTR SCFW SCRV SCFW SCRV LSTR AER ,, ,, ,, *1 Main motor/ Pre-exposure lamp Primary charging Transfer charging Transfer cleaning Reference bias (ATVC) Separation static eliminator Developing bias AC component Developing bias DC component Figure 3-302 3–36 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING C. Controlling the Scanning Lamp 1. Outline The scanning lamp (LA1) is controlled by the DC controller PCB; see Figure 3-303. Specifically, the DC controller: • Turns the scanning lamp ON and OFF. • Controls the intensity of the scanning lamp. 2. Mechanism a. Turning the Scanning Lamp ON and OFF The CPU (Q308) on the DC controller PCB controls the lamp regulator.
OPERATIONS AND TIMING D. Controlling the Primary Charging Roller The main transformer (T1) generates the primary voltage controlled by U402. 1. Outline Figure 3-304 shows the circuit that controls the application voltage of the primary charging roller, and the circuit has the following functions: • Turns ON/OFF the primary charging roller bias. • Controls the primary charging roller bias to a constant voltage. • Switches the application voltage level of the primary charging roller bias.
OPERATIONS AND TIMING 2. Turning ON/OFF the Primary Charging Roller Bias Under the control of the microprocessor master (Q301) on the DC controller PCB, the micro-processor on the composite power supply PCB generates the PCTRLS signal (pulse signal), which causes the secondary side of the transformer (T4) to go ON and the primary charging roller bias to be applied. 3.
OPERATIONS AND TIMING The sequence of this control mechanism is as follows during initial rotation after the power switch is turned ON: • Flow A specific voltage (about -1.46 kV) is applied to the primary charging roller for about 1.5 sec. > The current value at this time is checked by the current detection circuit, and the result is sent to the microprocessor.
OPERATIONS AND TIMING E. Controlling the Transfer Roller Bias 1. Outline The machine uses a direct transfer method that uses a roller; and, for this reason, it executes bias control in a way different from copiers that rely on corona charging. The transfer roller bias may be any of three types and has the following function and output timing: a. Transfer Bias This bias corresponds to the transfer bias of copiers that rely on corona charging. (constant voltage of -3.5 kV to -6.0 kV DC) b.
OPERATIONS AND TIMING Figure 3-306 shows the circuit that controls the foregoing three types of biases, and the circuit has the following functions: • Turns ON/OFF the transfer roller bias. • Controls the transfer bias to a constant voltage. • Corrects the voltage level of the transfer bias.
OPERATIONS AND TIMING 2. Turning ON/OFF the Transfer Roller Bias 4. Correcting the Transfer Bias Voltage Level (ATVC control) The TFWON signal is generated under the control of the microprocessor on the composite power supply PCB, thereby turning ON the secondary side of the transfer transformer (T5) and applying a DC bias to the transfer roller. Table 3-301 shows combinations of signals used to determine the transfer roller bias.
OPERATIONS AND TIMING F. Controlling the Static Eliminator Bias 1. Outline Figure 3-307 show the circuit that controls the static eliminator bias, and the circuit has the following functions: • Turns ON/OFF the static eliminator bias and controls it to a constant voltage. • Switches the static eliminator bias voltage level.
OPERATIONS AND TIMING 2. Switching the Voltage Level of the Static Eliminator Bias The microprocessor on the composite power supply PCB generates the JCTL signal (analog signal) under the control of the microprocessor (Q301) on the DC controller PCB, thereby causing the secondary side of the main transformer (T4) to turn ON; the bias for the static eliminator is generated by increasing the high-voltage output from the main transformer (T4). The JLVCTL signal is used to switch between output voltages 2.
OPERATIONS AND TIMING G. Controlling the Developing Bias 1. Outline Figure 3-308 shows the circuit that controls the developing bias, and the circuit has the following functions: • Turns ON/OFF the developing bias AC component. • Turns ON/OFF the developing bias DC component. • Controls the voltage level of the developing bias DC component. • Controls the developing bias DC component to a constant voltage.
OPERATIONS AND TIMING 2. Turning ON/OFF the Developing Bias DC Component and Controlling to Constant Voltage The microprocessor on the composite power supply PCB generates the BPWM signal (pulse signal) under the control of the microprocessor master (Q301) on the DC controller PCB, thereby turning ON the secondary side of the main transformer (T4) and applying the developing bias DC component.
OPERATIONS AND TIMING H. Copy Density Automatic Control 1. Outline The machine is equipped with an automatic density correction (AE) function that controls the DC component of the developing bias to suit the density of the original used. As long as the original has an even density, the machine will adjust the DC component of the developing bias to generate fogging-free copies. The DC component that has been adjusted in AE mode may be checked on the copy density indicator on the control panel. 2.
OPERATIONS AND TIMING 3. AE Adjustment • automatic adjustment of the lamp intensity during AE scanning (No. 301) • reference point adjustment for the copy density (developing bias) for AE mode (No. 302) • slope adjustment for the copy density (developing bias) for AE mode (No. 303) The machine’s AE adjustment may be performed in service mode, and it consists of the following three: Item No.
OPERATIONS AND TIMING The No. 1 stirring rod is used to supply toner to the developing cylinder and stir the layer of toner inside the developing chamber. The No. 2 stirring blade is used to stir the toner inside the toner container and to supply toner to the developing chamber. The waste toner collected by the cleaning blade is moved by the waste toner feeding blade for collection in the waste toner container. I. Developing/Cleaning Assembly 1.
OPERATIONS AND TIMING 2. Toner Level Detection Control The level of toner inside the cartridge is monitored by the antenna sensor circuit. Inside the cartridge is the toner level sensor, and an AC bias is applied to the developing cylinder. The developing cylinder and the toner level sensor are bonded statistically, and the amount of static charge between the two varies according to the level of toner inside the cartridge.
OPERATIONS AND TIMING q If the toner is more than a specific level, Since toner exists around the toner level sensor, the AC bias generated by the sensor is greater than the reference signal. In this condition, the output of the comparator circuit goes ‘1’ and the toner absent signal (TEP*) goes ‘0’. w If toner is less than a specific level, Since toner around the toner level sensor decreases, the AC bias generated by the sensor decreases.
OPERATIONS AND TIMING J. Blank Exposure Control The machine’s blank exposure area is controlled by two slide shutters and one open/close shutter. 1. Outline The machine directs light from the pre-exposure lamp to the photosensitive drum by way of a reflecting plate for blank exposure, thereby blanking out gaps between sheets of paper and non-image areas.
OPERATIONS AND TIMING 2. Blanking the Non-Image Area (reduction) 3. Blanking the Leading/Trailing Edge Margin and Sheet Gap In reduction mode, the change solenoid (SL1) turns ON, and the lens is moved to suit the selected reduction ratio. At this time, turning the change solenoid (SL1) OFF allows the drive of the lens motor to be transmitted to gear A/B; the slide shutter (rear/front) moves for the distance corresponding to the selected reduction ratio.
OPERATIONS AND TIMING K. Primary Charging Roller Cleaning Control 2. Primary Charging Roller Cleaning Operations 1. Outline The machine’s primary charging roller is equipped with an automatic cleaning mechanism. The automatic cleaning mechanism cleans the primary charging roller under the following conditions: • During initial rotation (INTR) after making 250 or more copies (accumulative; i.e., after executing transfer roller locking/releasing control five times).
OPERATIONS AND TIMING L. Transfer Roller Locking/ Releasing Control 1. Outline The machine’s transfer roller is equipped with a locking/releasing mechanism. The locking/releasing mechanism operates to lock or release the transfer roller, thereby preventing adhesion of toner to the roller under the following condition: • During last rotation (LSTR) after making 50 copies or more.
OPERATIONS AND TIMING IV. PICK-UP/FEEDING SYSTEM A. Pick-Up from the Machine 1. Outline When the pick-up clutch (CL2, CL3, or CL5) turns ON while the main motor is rotating, the appropriate pick-up roller rotates to pick up paper. The paper is then forwarded to the registration roller by way of the vertical path roller if it is from the cassette or directly if it is from the manual feeding tray.
3–58 COPYRIGHT © 1998 CANON INC.
COPYRIGHT © 1998 CANON INC.
OPERATIONS AND TIMING 2. Sequence of Operations (pick-up/feeding system; A4, 2 copies, cassette 1) Copy Start key ON INTER SRFW SCRV SRFW SCRV LSTR STBY Main motor (M1) Cassette 1 pick-up clutch (CL2) Registration clutch (CL1) Vertical path roller 1 paper sensor (PS11) Registration sensor (PS6) Separation sensor (PS7) Delivery sensor (PS8) Scanner home position sensor (PS1) Figure 3-403 3.
OPERATIONS AND TIMING B. Making Two-Sided Copies (1 copy) 1. Outline The copy paper takes the following path. When copying on the first side, the delivery roller reverses after the paper from the fixing assembly has moved past the delivery sensor; the paper is then sent to the duplexing unit. The paper stops several millimeters in front of the duplexing unit outlet paper sensor (PS14) and waits for copying on the second side.
OPERATIONS AND TIMING Copying on the 2nd Side (forward) Figure 3-407 2.
OPERATIONS AND TIMING C. Duplexing Unit 1. Outline The machine uses a set-back method and a separation flapper during continuous two-sided copying. The term set-back method refers to a method of preventing double feeding by stacking (tiling) sheets of paper in the limited space of the duplexing unit. The presence of the separation flapper at the outlet of the duplexing unit serves to improve separation of sheets. The set-back mechanism is used under the following conditions: 1.
OPERATIONS AND TIMING 2. Set-Back Operations The lower feeding inlet roller and the lower feeding outlet roller are driven by the main motor, and the setback roller is driven by a special stepping motor.
OPERATIONS AND TIMING a. Set-Back Operations 1. The first copy moves from the delivery assembly to the duplexing unit. Duplex iniet detect roller Duplex exit detect sensor (PS14) Set-back roller 1 Lower feeder assembly outlet roller Figure 3-412 2. The leading edge of the copy paper butts against the set-back roller 1 and forms an arch. Set-back roller 1 Figure 3-413 Set-back rollers Figure 3-414 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING 3. The set-back rollers 1 rotate counterclockwise, and the leading edge of the copy paper stops at a point about 12 mm past the set-back roller 1. 12mm Figure 3-415 4. The second copy paper is moved to the duplexing unit. Figure 3-416 5. The leading edge of the second copy paper butts against the set-back roller 1 and forms an arch. Set-back roller 1 Figure 3-417 3–66 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING 6. The set-back rollers 1 rotate clockwise, thereby pulling the trailing edge of the second copy paper out the duplexing unit inlet. Set-back rollers 12mm Figure 3-418 7. The set-back rollers 1 and 2 rotate counterclockwise, and the leading edge of the second copy paper stops at a point about 12 mm past the set-back roller 1. 12mm 12mm Figure 3-419 8.
OPERATIONS AND TIMING 9. The set-back rollers 1 rotates counterclockwise, thereby stopping the trailing edge of the first copy paper 6 mm before the set-back rollers 1. Set-back roller 6mm 3–68 Duplex exit detect sensor (PS14) Figure 3-420 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING 3. Re-Pick Up Operation After copying on the first side, the copy paper stacked in the duplexing unit is picked up once again for copying on the second side. The machine’s duplexing unit outlet is equipped with a flapper to improve separation of stacked paper, and the operation is as described below.
OPERATIONS AND TIMING 1. After the Copy Start key is pressed for the second side, the set-back roller and the duplexing unit outlet roller rotate clockwise. Set-back rollers Outlet roller duplex (CL4) Figure 3-422 2. When the first copy paper reaches the duplexing unit outlet sensor, the set-back roller and the duplexing unit outlet roller stop; the outlet roller duplex rotates. Duplex exit detect sensor (PS14) Figure 3-423 3.
OPERATIONS AND TIMING 4. When the registration sensor turns ON, the set-back roller and the duplexing unit outlet roller rotate clockwise to pick up the second copy paper. Separation sensor Photosensitive drum Registration sensor(PS6) Slip roller Figure 3-425 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING D. Pick-Up from the Cassette Feeding Module-A2 1. Pick-Up Operation When the pick-up clutch (CL1cu, CL2cu) turns ON while the cassette unit motor (M1cu) is rotating, the pick-up roller rotates to start pick-up operation; the copy paper is sent as far as the vertical path roller after the pick-up. (The paper, thereafter, takes the same path as it would if picked up from the machine’s cassette.
OPERATIONS AND TIMING 2. Sequence of Operations (cassette 3; A4, 2 copies) Copy Start key ON Cassette unit INTR SRFW SCRV SRFW SCRV LSTR STBY Cassette 3 pick-up clutch (CL1cu) Cassette 3 vertical path sensor (PS1cu) Cassette unit motor (M1cu) Copier Registration clutch (CL1) Registration sensor (PS6) Main motor (M1) Figure 3-427 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.
OPERATIONS AND TIMING E. Pick-Up from the Cassette Feeding Unit-K1 1. Pick-Up Operation The cassette unit motor 1 (M1cu) is used to drive the vertical path roller, and its drive is also used by the pick-up operation for cassettes 3 and 4. The drive of the cassette unit motor 2 (M2cu) is used by the pick-up operation of cassette 5.
OPERATIONS AND TIMING 2. Sequence of Operations (pick-up/feeding system; A4, 2 copies, cassette 3) Copy Start key ON INTR SRFW SCRV SRFW SCRV LSTR STBY Pick-up motor 1 (M1cu) Cassette feeding module Cassette 3 pick-up clutch (CL1cu) Cassette 3 vertical path sensor (PS1cu) Registration clutch (CL1) Copier Registration sensor (PS6) Scanner home position sensor (PS1) Figure 3-429 3.
OPERATIONS AND TIMING F. Paper Deck Pedestal-K1 1. Basic Construction The paper deck unit controls the operation of each load according to the signals from the pedestal controller PCB to send paper to the copier. Each of the loads used to pick-up and feed paper or raise the lifter is driven by the pedestal motor. If you operated the deck size switch, the size of the inside of the deck is communicated to the copier through the pedestal controller PCB.
OPERATIONS AND TIMING 2. Pick-Up/Feeding Operation a. Mechanism When the copier’s COPY START key is pressed, the deck pick-up clutch (CL1) turns on to rotate the deck pick-up roller. The deck pick-up roller leaves the paper when the deck pick-up roller release solenoid (SL1) turns on after feeding the paper.
OPERATIONS AND TIMING b. Sequence of Pick-Up Operations (A4, 2 copies) Copy Start key ON SCRV INTR SCFW SCRV SCFW LSTR Pick-up request signal Copier (from copier) Pedestal Deck pick-up clutch (CL1) Deck pick-up roller release solenoid (SL1) Deck vertical path roller paper sensor (PS2) Deck vertical path roller drive clutch (CL2) Vertical path roller 3 drive clutch (CL3) Figure 3-433 3–78 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING 3. Lifter Operation a. Operation When the deck is slid inside the pedestal, the pick-up roller lowers and the light-blocking plate leaves the deck lifter position sensor (PS3). The condition causes the lifter drive clutch (CL4) to turn on, and the drive of the pedestal motor (M1) is transmitted to the cable take-up shaft, thereby raising the lifter. The lifter keeps rising until the deck lifter position sensor (PS3) detects the top sheet of the paper stack placed on the lifter.
OPERATIONS AND TIMING b. Lifter Operation Deck motor M Feeding roller Pick-up roller Separation roller Lifter position sensor (PS3) Paper sensor Paper deteciting spacer Paper detecting lever Pick-up roller Lifter limit detecting lever Lifter upper limit sensor (PS4) Copy paper Oil damper Figure 3-435 3–80 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING 4. Detecting Paper in the Deck a. Identifying the Size of Paper You must set the switch (SW1) on the deck size switch PCB to suit the size of paper set inside the paper deck. When you set the switch, the paper size signal (SIZE1 and SIZE2) sent to the pedestal controller PCB changes to ‘1’ or ‘0’.
OPERATIONS AND TIMING G. Multifeeder The copy paper on the tray is forced against the pick-up roller by the paper guide plate; the pick-up roller starts to rotate when it receives drive from the main motor (M1) through a clutch. The pick-up roller and the separation pad serve to make sure that no more than a single sheet of copy paper is sent to the registration roller. The above series of operations is executed for each pick-up. 1.
OPERATIONS AND TIMING 2. Identifying the Size of Paper on the Multifeeder Tray The size of paper on the tray is identified by the variable resistor (VR1) that operates in association with the slide guide moving in relation to the slide guide moved by the user to suit the width of the paper. The identified width of the copy paper is used to control the lens and blank exposure. The length of paper placed on the multifeeder tray is identified in relation to how long the registration sensor (PS6) remains ON.
OPERATIONS AND TIMING 3. Sequence of Operations (multifeeder; A4, 2 copies) Copy Start key ON INTR SRFW SCRV SRFW SCRV LSTR Multifeeder pick-up solenoid (SL2) Multifeeder pick-up clutch (CL3) Pre-registration sensor (PS6) Registration clutch (CL2) Scanner motor (M2) Figure 3-440 3–84 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING H. Identifying the Size of the Cassette Specific photointerrupters (Q651, Q652, Q653, Q654) turn OFF or ON when a cassette is slid into a cassette holder. Specific combinations of the states (ON/OFF) of the photointerrupters are used by the microprocessor on the DC controller PCB to identify the presence/ absence of a cassette and the size of the cassette (if any) and to control scanner reversal and blank exposure. (See Table 3-402.
OPERATIONS AND TIMING To change the size of a cassette, move the guide plates (horizontal, vertical) inside the cassette and also move the paper size lever found at the front of the cassette to the left or right so that the arrow points to the appropriate paper size as indicated in Figure 3-441. Caution: A discrepancy between the size of the copy paper being used and the size selected by the paper size lever will trigger an incorrect copying sequence, leading to jamming and soiling.
OPERATIONS AND TIMING I. Fixing/Delivery Assembly 1. Controlling the Fixing Roller Temperature The upper and lower rollers of the fixing assembly and the delivery roller of the delivery unit are driven by the main motor (M1). The upper roller is heated by a heater (H1:900W) built in it. The DC controller monitors the surface temperature of the upper roller by means of two thermistor (TH1, TH2) so as to control the temperature to a specific value.
OPERATIONS AND TIMING Target temperatures for the following size paper: A3 – A4 B4 – B5 A4R – A5 – Folio B5R – B6 Argentine letter Oficio Equador Australian Foolscap A5R – A6 Ledger – Letter Argentine Legal Government Letter R – Government Legal Mini (STM) R Government letter – Executive Argentine Letter R Government Korea R B6R Government Korea Officio – Oficio Bolivia Executive R A6R Foolscap – Legal – Letter R – Mini Peak Target number temperature 1 135 2 142 3 146 4 149 5 153 6 155
OPERATIONS AND TIMING The copier is equipped with three protection mechanisms to prevent the fixing heater from going ON at wrong timing. • The microprocessor monitors the voltage of TH1 and indicates ‘E000’ or ‘E001’ or ‘E002’ or ‘H003’ in response to an error. • If the voltage of TH1 and TH2 falls below about 0.9 V (equivalent of 215°C), the error detection circuit cuts off the supply power to the fixing heater regardless of the output of the microprocessor.
OPERATIONS AND TIMING 3.
OPERATIONS AND TIMING 4. Detecting Overheating of the End of the Fixing Heater The rear end of the machine’s fixing heater is equipped with a sub thermistor (TH2) to detect and prevent overheating of the end of the fixing heater. This consideration is made to prevent damage to the fixing roller caused by overheating occurring as a result of overheating on the area of the fixing not covered by paper during copying operation, as when making copies smaller than B5 in continuous mode.
OPERATIONS AND TIMING J. Detecting Jams As many as ten paper sensors (3 of which are in the cassette unit) are used to find out whether copy paper is moving normally.
OPERATIONS AND TIMING 1. Vertical Path Roller 1 Delay Jam Copy paper does not reach the vertical path roller 1 paper sensor (PS16) within a specific time after the cassette 1 pick-up clutch (CL2) has turned ON. Copy Start key ON STBY INTR JAM flashed SRFW SCRV SRFW Cassette 1 pick-up clutch (CL2) 1.2 sec Jam check 1.2 sec Normal Vertical path roller 1 paper sensor (PS16) Error Main motor (M1) Figure 3-444 Sequence of Operations 2.
OPERATIONS AND TIMING 3. Vertical Path Roller 2 Delay Jam Paper does not reach the vertical path roller 2 paper sensor within a specific time after the cassette 2 pickup clutch (CL5) has turned ON. Copy Start key ON STBY INTR JAM flashed SRFW SCRV SRFW Cassette 2 pick-up clutch (CL5) 1.0 sec Jam check 1.0 sec Error Normal Vertical path roller 2 paper sensor (PS12) Main motor (M1) Figure 3-446 Sequence of Operations 4.
OPERATIONS AND TIMING 5. Pre-Registration Delay Jam (vertical path roller) Copy paper does not reach the pre-registration sensor (PS6) within a specific time after it has reached the vertical path roller 1 paper sensor (PS16). Copy Start key ON STBY INTR JAM flashed SRFW SCRV SRFW Cassette 2 pick-up clutch (CL5) Jam check 1.0 sec Vertical path roller 2 paper sensor (PS12) Normal 1.0 sec Error Main motor (M1) Figure 3-448 Sequence of Operations 6.
OPERATIONS AND TIMING 7. Separation Delay Jam Copy paper does not reach the separation sensor (PS7) within a specific time after the registration clutch (CL1) has turned ON. Copy Start key ON STBY JAM flashed INTR SRFW SCRV SRFW Registration clutch (CL1) 0.7 sec Jam check 0.7 sec Normal Separation sensor (PS7) Error Main motor (M1) Figure 3-450 Sequence of Operations 8.
OPERATIONS AND TIMING 9. Delivery Delay Jam Copy paper does not reach the delivery sensor (PS8) within a specific time after the separation sensor (PS7) has turned ON. Copy Start key ON INTR JAM flashed SRFW SCRV SRFW Separation sensor (PS7) Jam check Delivery sensor (PS8) 1 sec Normal 1 sec Error Main motor (M1) Figure 3-452 Sequence of Operations COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING 10. Delivery Stationary Jam Copy paper does not move past the delivery sensor (PS8) within a specific time after the delivery sensor has turned ON because of feeding faults. JAM flashed SCFW SCRV LSTR Normal Delivery sensor (PS8) *1 Error *1 Jam check Main motor (M1) ∗1 Varies depending on paper length (paper length + 40 mm). Figure 3-453 Sequence of Operations 11.
OPERATIONS AND TIMING 12. Pick-Up Delay Jam (cassette unit) Copy paper does not reach the cassette vertical path sensor (PS1cu, PS3cu, PS5cu) within a specific time after the cassette pick-up clutch (CL1cu, CL2cu, CL3cu) has turned ON because of feeding faults. Copy Start key ON STBY JAM flashed INTR SCFW SCRV SCFW Cassette pick-up clutch (*1) 1.3 sec 1.
OPERATIONS AND TIMING 13. Pick-Up Delay Jam (Paper Deck Pedestal-K1) Copy Start key ON JAM flashed INTR Pick-up clutch (CL1) Jam check Vertical path roller paper sensor (PS2) normal error Figure 3-456 14. Pick-Up Timing Jam (Paper Deck Pedestal-K1) Copy Start key ON JAM flashed Pick-up clutch (CL1) Jam check Vertical path roller paper sensor (PS2) normal error Figure 3-457 3–100 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING V. POWER SUPPLY A.
OPERATIONS AND TIMING B. Power Supply Circuitry Caution: The AC power supply unit remains supplied with voltage even when the power is OFF. The machine’s power supply unit uses a single main transformer (T101) to supply DC power. AC power is supplied to the DC power supply when the power switch (SW1) and the door switch are turned ON.
OPERATIONS AND TIMING C. Detecting Errors on the Power Supply PCB The microprocessor (U402) and LED501 on the composite power supply PCB checks for errors; if an error is identified, the microprocessor (U402) communicates with the DC controller to indicate the results of self diagnosis on the display or to flash LED501 to alert the user.
OPERATIONS AND TIMING D. Protection Mechanisms for the Power Supply Circuit The composite power supply PCB is equipped with an overcurrent detection circuit; its protection mechanism turns ON to stop the output if a short circuit occurs because of a fault in the loads. When the output is stopped, open the front door to turn OFF the door switch, correct the load, and turn ON the door switch and the power switch to return the output.
OPERATIONS AND TIMING VI. SERVICE MODE A. Outline B. Using Service Mode The machine’s service mode is grouped into the following six: 1. Starting Service Mode No. Description [1] Control display mode [2] I/O display mode [3] Adjustment mode [4] Operation/inspection mode [5] Machine settings mode [6] Counter mode 1) Open the front door, and insert the door switch actuator. • If you want to make checks as in “I/O display mode” while making copies, set the appropriate copying mode.
OPERATIONS AND TIMING 4. Using Adjustment Mode (‘3’) and Machine Settings Mode (‘5’) 1) Press the numeric keypad to change the number. • The number flashes. • If the number is negative, ‘%’ turns ON. To enter a negative number, press the % key and enter the number on the numeric keypad. 2) Press the AE key. • The machine stores the value and stops flashing the value. • A press on the Start key starts copying operation. 3) To change the number once again, repeat steps 1) and 2).
OPERATIONS AND TIMING C. Control Display Mode (‘1’) • To select an item, press the appropriate number on the numeric keypad and then the Start key. • To deselect an item, press the Clear key. • A press on the Start key while a description of the selected service mode is indicated will execute appropriate copying operations. No. Service mode Description 101 Jam location Indicates the jam location on the copy counter indicator. (See the next page.
OPERATIONS AND TIMING No. 101 Jam Location Display The type of jam is indicated using the copy counter.
OPERATIONS AND TIMING No. 120 Jam interval indication Jam interval indication 120 By pushing key 1 First lates jam interval. 2 Second latest jam interval. 3 Third latest jam interval. 4 Fourth latest jam interval. 5 Fifth latest jam interval. 6 Sixth latest jam interval. 7 Seventh latest jam interval. 8 Eigth latest jam interval. 9 Nineth latest jam interval. 0 Tenth latest jam interval. Table 3-605 It displays the number of copies made (in tens: 1 to 999) between two jams occurence.
OPERATIONS AND TIMING D. I/O Mode (‘2’) • • • • To start I/O display mode, press ‘2’ (numeric keypad) and then the AE key. To select an item, press the appropriate number on the numeric keypad and then the Start key. To deselect an item, press the Clear key. A press on the Start key while a description of the selected service mode is indicated will execute appropriate copying operations. No.
OPERATIONS AND TIMING No. 214, No. 215, No. 216, No. 217, and No. 218 No.
OPERATIONS AND TIMING No. 219, No. 220, and No. 221 No. LED 219 220 221 Description Item 1-a Cassette size 1 (cassette 4/5) ON: light-blocking plate present 1-b Cassette size 2 (cassette 4/5) ON: light-blocking plate present 1-c Cassette size 3 (cassette 4/5) ON: light-blocking plate present 1-d Cassette size 4 (cassette 4/5) ON: light-blocking plate present 1-e Option cassette connection detection 3 See the table below.
OPERATIONS AND TIMING No. 222 Port P0 Display LED Description Item 1-a Registration sensor (PS6) ON: paper present 1-b Delivery sensor (PS8) ON: paper present 1-c Lens home position sensor (PS2) ON: at HP 1-d Blanking shutter home position sensor (PS3) ON: at HP 1-e Halogen lamp check signal OFF: E220 error 1-f Heater ON detection (triac short circuit detection) ON: hater ON detected 1-g Composite power supply ACK ON: acknowledged Table 3-611 COPYRIGHT © 1998 CANON INC.
OPERATIONS AND TIMING E. Adjustment Mode (‘3’) • • • • • • To start the mode, press ‘3’ on the numeric keypad and press the AE key. To select an item, press the appropriate number on the numeric keypad and then the Start key. To change the value, enter the appropriate value on the numeric keypad and then press the AE key. To deselect an item, press the Clear key. A press on the Start key will execute appropriate copying operations. If the number is negative, ‘%’ turns ON.
OPERATIONS AND TIMING No. Item Settings Description 312 Left/right margin adjustment (reduction; the movement of the blanking slide shutter) –10 ~ +10 A higher setting increases both left and right margins. default: –2 unit: 0l.27 mm 313 Primary output voltage correction (correction against the output voltage determined on APVC) –16 ~ +16 Enter the value recorded on the label attached to the drum cartridge whenever you have replaced the drum cartridge.
OPERATIONS AND TIMING No. Item Settings Description 324 Duplex paper stack timing adjustment 0 ~ 63 A higher setting delays the ON timing. unit: 0.27 mm default: 32 325 Set-back roller reversal timing adjustment 0 ~ 63 A higher setting delays the reversal timing. unit: 0.27 mm default: 32 326 Lamp intensity adjustment 327 Duplexing unit inlet arch adjustment 0 ~ 63 A higher setting increases the arch. default: 28 unit: 0.
OPERATIONS AND TIMING F. Operation/Inspection Mode (‘4’) • • • • • To start inspection mode, press ‘4’ (numeric keypad) and then the AE key. To select an item, press the appropriate number on the numeric keypad and then the Start key. To execute the mode, press the Start key. To end the mode, press the Stop key, thereby returning to item selection. If the mode is designed to stop automatically, the machine will automatically return to item selection after ending the mode. No.
OPERATIONS AND TIMING G. Machine Settings Mode (‘5’) • • • • • To start machine settings mode, press ‘5’ (numeric keypad) and then the AE key. To select an item, press the appropriate number on the numeric keypad and then the Start key. To change the value, enter the new value on the numeric keypad, and press the AE key. To deselect the item, press the Clear key. A press on the Start key will execute appropriate copying operations. No.
OPERATIONS AND TIMING Description Item No. 509 Universal cassette paper size storage (cassette 2) settings: default: 0 to 14 0 510 Universal cassette paper size storage (cassette 3) settings: default: 0 to 14 0 511 Universal cassette paper size storage (cassette 4) settings: default: 0 to 14 0 512 Universal cassette paper size storage (cassette 5) settings: default: 0 to 14 0 Table 3-614-2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
OPERATIONS AND TIMING H. Counter Mode (‘6’) • • • • To start counter mode, press the ‘6’ key on the numeric keypad and press the AE key. To select an item, press the appropriate number on the numeric keypad and then the Start key. To deselect an item, press the Clear key. A press on the Start key while a description of the mode is indicated will execute appropriate copying operations. • To obtain the actual count, multiply the indicated value by 100. No.
OPERATIONS AND TIMING VII.SELF DIAGNOSIS The microprocessor on the machine’s DC controller is provided with a self diagnosis mechanism which checks the condition of the machine (sensors in particular) and indicates a code to identify the error it detects. Detecting an error associated with ‘E000’ will automatically turn OFF the power. (error auto poweroff) A.
OPERATIONS AND TIMING Code Possible cause Description • Composite power supply (faulty) • DC controller (faulty) The output value is different from the setting for the high-voltage output of the composite power supply. • Scanner cable (displacement, tear) • Scanner home position sensor (PS1; faulty) • Scanner motor (M2; faulty) • DC controller (faulty) The scanner does not return to home position within 5 sec when scanning operation is started. ‘E002’ may be checked in service mode No. 108.
OPERATIONS AND TIMING Initializing Back-Up Error Codes If the self-diagnosis mechanism has turned ON, you can reset the machine by turning OFF and then ON the power switch, unless the error is represented by ‘E000’, ‘E001’, ‘E002’, “E003', or ‘E004’. This is to prevent the user from resetting the machine thereby damaging the fixing assembly. If ‘E000’, ‘E001’, ‘E002’, “E003', or ‘E004’ is indicated, remove the cause of the error and perform the following: COPYRIGHT © 1998 CANON INC.
OPERATIONS AND TIMING B. Self Diagnosis on the Cassette Feeding Unit Code Cause E901 • Cassette feeding unit controller (faulty) • Cassette feeding unit motor (faulty) 3–124 COPYRIGHT © 1998 CANON INC. Description • The motor clock signal is not detected within 1 sec after the pedestal motor drive signal has been generated. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
OPERATIONS AND TIMING C. RDF/ADF Self Diagnosis Code Cause Description • Data communication with copier (faulty) • Communication breaks for 5 sec or more. (The communication is monitored at all times.) E401 • Pick-up motor (faulty) • Pick-up roller home position sensor (faulty) • The state of the sensor remains unchanged even after the pick-up motor has been driven for 2 sec or more.
OPERATIONS AND TIMING D. Sorter Self Diagnosis Code E500 E510 E530 Cause • CPU or communication IC on sorter controller (faulty) • An error has been detected in the communication between the sorter and the copier. • Feeding motor (fails to rotate) • The clock signal from the motor is absent for 250 ms or more. • Staple guide bar swing motor (fails to rotate) • The home position sensor does not turn OFF after generating the motor drive signals for 2560 pulses.
OPERATIONS AND TIMING VIII. STANDARDS AND ADJUSTMENTS A. Electrical 1 Adjustment after Replacing PCBs You must perform the following adjustments whenever you have replaced the following PCBs: a. DC Controller PCB 1) Start service mode (adjustment mode [3]), and enter the settings indicated on the Service Mode label attached behind the front door. 2) Perform the multifeeder paper width sensor adjustment. 3) Perform scanning lamp intensity adjustment. 4) Perform AE adjustment.
OPERATIONS AND TIMING If you have replaced the AE sensor, scanning lamp, or DC controller or if you performed scanning lamp intensity adjustment (VR301), you must perform • AE basic adjustment, • No. 410 scanning forward stop, • No. 408 scanning lamp ON check, • No. 208 AE sensor voltage indication, and • No. 301 AE scanning lamp intensity automatic adjustment. Go through the steps that follow when making these adjustments. Table 3-801 gives a list of three service modes excluding No.
OPERATIONS AND TIMING • default: 0 settings: –26 to +26 • If the value is negative, ‘%’ is turned ON. To enter a negative value, press the ‘%’ key before entering the value. • The indication stops flashing and remains ON when the value has been stored. 5) Record the new adjustment value in the Service Mode label. 6) Press the Clear key. • The machine returns to item selection and indicates ‘302’. • As necessary, perform No. 303. c. AE Mode Copy Density (developing bias) Slope Adjustment (No.
OPERATIONS AND TIMING Item No. 301 Remarks Description Function The lamp intensity is automatically adjusted so that the copies of the Test Chart will be made at density 5. Automatic lamp intensity adjustment for AE scans Lighter 9 Copy density 5 Darker Test Chart No. 302 Copy density (development bias) reference point adjustment for AE mode Density of original w q Lighter 9 Copy density 5 Darker q A lower setting in service mode causes the AE copies to be darker.
OPERATIONS AND TIMING 4 Multifeeder Paper Width Sensor Adjustment In this adjustment, you will be storing the characteristics of the multifeeder paper width sensor using service mode No. 501. Perform the adjustment if you have replaced the sensor or if the machine wrongly identifies paper sizes. 1) Open the front door, and insert the door switch actuator into the door switch. 2) Press the service mode switch (SW850) with a hex key. • The machine starts service mode and indicates ‘1’.
OPERATIONS AND TIMING 5 Setting the Paper Size for the Universal Cassette You will be using service mode to set the paper size that is effective when the paper size lever of the cassette is positioned for the universal cassette. 1) Open the front door, and insert the door switch actuator into the door switch. 2) Press the service mode switch (SW850) with a hex key. • The machine starts service mode and indicates ‘1’. 3) Press ‘5’ on the numeric keypad. • The display indicates ‘5’. 4) Press the AE key.
OPERATIONS AND TIMING 6 Initializing the Back-Up RAM 1) Open the front door, and insert the door switch actuator into the door switch. 2) Press the service mode switch (SW850) with a hex key. • The machine enters service mode and indicates ‘1’. 3) Press ‘4’ on the numeric keypad. • The display indicates ‘4’. 4) Press the AE key. • The machine starts operation/inspection mode and indicates ‘401’. 5) Press ‘5’ and ‘0’ on the numeric keypad. • The display indicates ‘450’. 6) Press the Start key.
OPERATIONS AND TIMING 3–134 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
CHAPTER 4 MECHANICAL SYSTEM 1. 2. 3. 4. 5. Before disassembly or reassembly work, disconnect the heating (if a heater is installed) and main body power cord(s). Group the screws by type (length and diameter) and location. The fixing screw for the grounding wire and varistors is fitted with a washer to ensure electric continuity; be sure to use the washer for reassembly. If possible, avoid operating the machine with any of its parts removed. Unless otherwise noted, reassembly is the reverse of disassembly.
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
MECHANICAL SYSTEM I. EXTERNALS Note: Remove the covers as necessary to clean, inspect, or repair the inside of the machine. Those covers that may be detached by merely removing their mounting screws are left out of the discussions. A. External Covers 1 10 9 2 When installing the copyboard glass, be sure to butt it against the vertical size plate so that no gap is left for intrusion of foreign matter.
MECHANICAL SYSTEM 3 B. Control Panel 5 3 1. Removing the Control Panel 1) 2) 3) 4) 5) 6) 7) Remove the copyboard glass. Remove the upper left cover. Open the front door. Pull the open/close lever, and open the body. Remove the right cover. Remove the left cover. Remove the four screws q, and remove the inside cover w. 1 Figure 4-106 C. Removing the Display Panel 1) Remove the display panel q using a pen or the like.
MECHANICAL SYSTEM 5) Holding the exhaust fan assembly r, pull it off to the front. D. Fan 1. Removing the Exhaust Fan 1) Open the front door. 2) Pull the open/close door, and open the body. 3) Remove the relay connector q. 4 1 Figure 4-111 Figure 4-108 6) Remove the four screws t, and remove the air conveyor y,.then remove the fan u together with the two rubbers i. 4) Remove the screw w from the rear and the two screws from the front e. 5 8 8 7 2 5 6 5 Figure 4-112 2.
MECHANICAL SYSTEM E. Counter* * This may not be available for sale in same areas. 1. Installing the Option Counter (CNT2) 5) Install the counter mount to the copier with two screws. 6) Connect the two connectors t of the counter. 1) Open the top body. 2) Remove the inside upper cover. 3) Remove the two screws w, and disconnect the connector e; then, remove the counter mount q. 1 3 5 Figure 4-116 7) Set SW303 on the DC controller as indicated in Table 4-101.
MECHANICAL SYSTEM II. DRIVE SYSTEM A. Scanner Drive System 1. Removing the Scanner Drive Motor 1) Remove the copy board glass. 2) Remove the spring q, the E ring w, the tensioner e, and the belt r. 2. Removing the Scanner Cable 1) Remove the copyboard cover, right cover, left cover, upper rear cover, and lower rear cover. 2) Remove the copyboard glass. 3) Remove the control panel. 4) Remove the copyboard cover support q. Scanner wire 3 1 1 2 4 Figure 4-201 3) Remove the upper rear cover.
MECHANICAL SYSTEM 7) Loosen the two screws r, and loosen the cable tension (both front and rear). 3. Assembling the Mirror Positioning Tool 1) Remove the screw from position B. 4 B A A B Position B Longest pin Medium-Length pin Figure 4-206 8) Move the No. 1 mirror mount in the forward direction, and match the angular hole in the front side panel and the cable fixing screw t. Then, remove t to separate the No. 1 mirror mount and the scanner cable (both front and rear).
MECHANICAL SYSTEM 4. Routing the Scanner Cable Caution: You must keep the mirror positioning tool (FY93009) and the pulley clip (FY9-3010) near at hand when routing the scanner cable. Assemble the mirror positioning tool according to “Assembling the Mirror Positioning Tool” in advance. B B A A Figure 4-210 1) As in q, put the steel ball into the hole in the pulley; then, wind the cable four times toward the flange and nine times in the opposite direction.
MECHANICAL SYSTEM 10 Set screws Loosen the set screws to enable free rotation. 2 Screw 3 Loosen the screw,and shift it down. Put the steel ball into the hole in the pulley; wind the cable nine times toward the inside, and four times toward the outside; then, snap on the pulley clip. Attach the mirror positioning tool. 8 Re-tighten the screw. Pulley clip Steel ball 1 5 9 46.
MECHANICAL SYSTEM 5. Adjusting the Mirror Position (optical length between No. 1 mirror and No. 2 and No. 3 mirrors) 5) Install the metal fixing of the scanner cable to the No. 1 mirror mount with two screws e (both front and rear). 1) Keep the mirror positioning tool near at hand. (See “Assembling the Mirror Positioning Tool.”) 2) Move the No. 1 mirror mount in the forward direction, and match the angular hole in the front side plate and the cable fixing screw q.
MECHANICAL SYSTEM B. Lens Drive Assembly 6) Disconnect the two connectors y from the rear. 1. Removing the Lens Drive Motor 1) Remove the upper rear cover and the right glass retainer. 2) Remove the copyboard glass. 3) Move the No. 1 mirror assembly q to the left. 4) Remove the two screws w, and remove the lens cover e. 6 2 Figure 4-219 7) Remove the two screws u, and remove the lens drive unit i. 2 1 3 8 (front) Figure 4-217 5) Loosen the tension on the spring r, and remove the cable t.
MECHANICAL SYSTEM 8) Remove the two screws o, and disconnect the connector !0; then, remove the lens motor !1. Caution: When removing the screw o, disconnect the connector !0 first to avoid contact between the harness and the driver. 10 9 11 Figure 4-221 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
MECHANICAL SYSTEM 2. Routing the Lens Cable SL 2 Turn clockwise 3 times. 1 3 Figure 4-222 Lens Drive Assembly 1) Stop the lens cable at each pulley q, and wind it around the pulley w. 2) Move the tension pulley e, and attach the cable. 4–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
MECHANICAL SYSTEM 3. Positioning the Change Solenoid Loosen the two screws t to adjust so that the gear r moves through the arm e in the direction of b until it stops when the steel core q of the solenoid is fully pushed in the direction of B, i.e., when the E-ring w has come into contact with the solenoid. 3 1 5 a b 4 2 A B Figure 4-223 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.
MECHANICAL SYSTEM C. Main Motor 1. Removing the Main Motor Unit 1) Disconnect the two connectors q, and remove the three mounting screws w; then, remove the main motor unit e. 1 3 2 2 Figure 4-224 2. Routing the Drive Belt Route the drive belt over the pulley and the tensioner as indicated. Pulley Drive belt Tensioner Figure 4-225 Vertical path roller gear Main motor Tensioner Vertical path roller clutch (CL7) Figure 4-226 4–14 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
MECHANICAL SYSTEM III. PICK-UP/FEEDING SYSTEM A. Pick-Up Assembly 2. Removing the Pick-Up Roller 1) Remove the pick-up roller unit. (See “Removing the Pick-Up Roller Unit.”) 2) Remove the E-ring q, bushing w, spacer 1 e and spacer 2 r; then, remove the pick-up roller t. 1. Removing the Pick-Up Roller Unit 1) Remove the lower rear cover. 2) Remove the grip ring q, and remove the pickup clutch w.
MECHANICAL SYSTEM 4. Removing the Separation Pad 5. Adjusting the Left/Right Registration 1) Fully open the right door. (Remove the tension tape from the door.) Make adjustments so that the image position is as indicated in Figure 4-308 when the Test Sheet is copied in Direct. Caution: Take care not to open the right door excessively. 2) Remove the front right cover. 3) Remove the vertical path guide q (upper; four screws). 1 a.
MECHANICAL SYSTEM 5) Shift the multifeeder pick-up roller unit y toward the rear, and remove it. B. Multifeeder Assembly 1. Removing the Multifeeder Pick-up Roller Unit 1) Open the right door. 2) Remove the E-ring q, and pull out the bushing w. 3) Remove the two screws e. 1 2 3 6 Figure 4-311 2. Removing the Multifeeder Pick-Up Roller Figure 4-309 4) Remove the screw r, and remove the roller cover t. 1) Remove the multifeeder pick-up roller unit. (See “Removing the Multifeeder Pick-Up Roller Unit.
MECHANICAL SYSTEM 3. Points to Note When Installing the Multifeeder Pick-Up Roller 5. Removing the Multifeeder Spring Clutch When installing the multifeeder pick-up roller q, make sure that the side with a cross w on the collar is toward the rear. 1) Remove the upper rear cover and the lower rear cover. 2) Remove the three screws q, and shift the cord guide w. 1 2 1 2 (front of copier) Figure 4-313 1 4. Removing the Separation Pad 1) Open the upper right door.
MECHANICAL SYSTEM 5) Remove the two E-rings i, and remove the two bushings o. 6) Remove the spring !0 of the actuator. 7) Remove the three screws !1, and remove the solenoid mounting plate !2. 9 8 9 8 11 10 6. Positioning the Multifeeder Assembly Paper Guide Plate Cam Temporarily fix the screw with a hex nut of the spring clutch assembly, and turn the control ring.
MECHANICAL SYSTEM Caution: If the adjusting hole is not furnished with a black dot for reference, make adjustments as instructed while making sure that the paper guide plate cam of the multifeeder aseembly is located as shown. C. Registration Roller Assembly 1. Removing the Registration Clutch 1) Remove the lower rear cover. 2) Remove the clip ring q, and disconnect the connector w; then, remove the registration clutch e. 2 Paper guide plate cam 130.5±0.5mm Hole 3 1 Figure 4-320 Figure 4-322 7.
MECHANICAL SYSTEM 2 3. Removing the Lower Registration Roller 1) Remove the E-ring (front) q, and shift the bushing w. 2) Remove the registration roller e. 2 3 Figure 4-324 Caution: At this time, take care so that the springs at the front and the rear will not fly away. 3) Remove the upper registration roller e by lifting it. 1 Figure 4-326 3 Figure 4-325 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
MECHANICAL SYSTEM D. Feeding Assembly E. Delivery Assembly 1. Removing the Feeding Belt 1. Removing the Delivery Roller 1) Remove the mounting screw w, and remove the feeding center guide w. 2) Pull the feeding roll e toward the fixing assembly, and remove it. 3) Remove the feeding roll r, and remove the feeding belt t. 4 4 5 5 1) Open the top body. 2) Remove the E-ring q. 3) Shift the bushings (rear) w and (front) e; then, remove the delivery roller r.
MECHANICAL SYSTEM F. Duplexing Assembly 1. Removing the Duplexing Assembly Inlet Unit 3) Remove the lower rear cover. 4) Disconnect the connectors (J325, J326) r. 4 1) Remove the left cover. 2) Remove the delivery roller. 3) Disconnect the connector q, and remove the duplexing unit w inlet unit. Figure 4-332 5) Remove the two mounting screws t, and remove the duplexing unit y. 1 2 Figure 4-330 6 2. Removing the Duplexing Unit 1) Remove the front door, two cassettes and the front left cover.
MECHANICAL SYSTEM G. Cassette Unit 1. Removing the Copier from the Cassette Unit 3) Remove the bushing w of the pick-up roller unit e while pushing it down toward the left. 1) Disconnect the copier’s power plug. 2) Disconnect the cassette unit connector q from the copier. 3 2 Figure 4-336 3. Removing the Pick-Up Roller 1 Figure 4-334 3) Holding the copier’s grips, remove the copier from the cassette unit. 2. Removing the Pick-Up Roller Unit 1) Remove the pick-up roller unit.
MECHANICAL SYSTEM 4. Points to Note When Installing the Pick-Up Roller When installing the pick-up roller q, install it so that the marking w shown in Figure 4-338 is toward the rear. 4) Remove the four screws r, and disconnect the two connectors t; then, remove the pick-up drive unit y. 4 5 2 5 4 6 4 1 Figure 4-341 Figure 4-338 6. Removing the Cassette Motor 5. Removing the Pick-Up Unit 1) Remove the rear cover and the right cover. 2) Remove the screw q. 1) Remove the rear cover.
MECHANICAL SYSTEM 7. Removing the Pick-Up Clutch 1) Remove the pick-up drive unit. (See “Removing the Pick-Up Drive Unit.”) 2) Remove the cassette motor. (See “Removing the Cassette Motor.”) 3) Remove the three screws q and bushing w; then, remove the side plate e and the pick-up clutch r. 4 9. Removing the Pick-Up Motor (Cassette Pedestal-K1) 1) Remove the upper rear cover. 2) Remove the two screws q, and disconnect the connector w; then, remove the motor e.
MECHANICAL SYSTEM 4) Remove the six screws w and two E-rings e; then, remove the support plate r. 5) Remove the two pick-up clutches t. H. Paper Deck Pedestal-K1 1. Removing the Pedestal Motor Drive Assembly 1) Slide out the holding tray to the front. 2) Remove the rear cover. 3) Disconnect the four connectors q, and remove the harness from harness guide w. 4) Remove the three mounting screws e, and remove the pedestal motor drive assembly. r. 2 3 4 5 3 3 4 2 Figure 4-347 11.
MECHANICAL SYSTEM 4) Mark the position of the latch assembly, and detach the latch assembly by removing the mounting screws e on both left and right (6 in total). 2 3 1 3 Figure 4-351 (left) 3) Slide out the paper deck slowly to the front. Figure 4-353a (left) 3. Removing the Lifter Wire 1) Remove the paper deck. 2) Remove the deck front cover. 3) Remove the two screws q from the inside of the deck and remove the guide plate w from both front and rear.
MECHANICAL SYSTEM 6) Remove the mounting screw y from the front, and remove the oil damper plate u. 8) Remove the E-ring !1; then, remove the gear !2, parallel pin, and pulley cover (front/rear in common). 11 6 12 7 Figure 4-355 Figure 4-357 7) Remove the E-ring i from the lifter drive shaft (rear); then, remove the gear o, two washers, and spring !0. 9) Remove the end of the wire from the pulley (front/rear in common).
MECHANICAL SYSTEM 11) Remove the mounting screw !4, and remove the wire together with the mounting support. 6) Remove the six mounting screws t, and remove the pick-up assembly. 5 14 Figure 4-359 Figure 4-361 4. Removing the Pick-Up Assembly 1) Open the right door of the pedestal, and slide out the paper deck to the front about 10 cm. Caution: • For the paper deck pedestal, slide out only the paper deck.
MECHANICAL SYSTEM 4) Remove the stop ring t from the feeding roller. 6. Points to Note a. The collars for the pick-up roller are identified by color; use the gold collar for the front, and the silver collar for the rear. b. Do not separate the rubber portion of the pickup roller from the collar. 7. Removing the Feeding Roller 1) Remove the pick-up roller from the front. 2) Remove the mounting screw q, and remove the pick-up roller arm bushing w.
MECHANICAL SYSTEM 8. Points to Note When installing the feeding roller q, make sure that the belt pulley w attached to the feeding roller is toward the rear of the copier. 2) Remove the stop ring e, and remove the separation roller r. 4 3 2 1 Front of copier Figure 4-369 Figure 4-367 10.Points to Note 9.
MECHANICAL SYSTEM 11.Adjusting the Pressure of the Separation Roller If double feeding or pick-up failure occurs frequently during pick-up operation, adjust the position of the pressure spring for the separation roller. q if double feeding is frequent, move the hook of the spring toward A. w if pick-up failure is frequent, move the hook of the spring toward B. 1 2 3 B A 4 Figure 4-371 12.
MECHANICAL SYSTEM IV. EXPOSURE SYSTEM A. Illuminating Assembly 1. Removing the Scanning Lamp/Fluorescent Heater 1) 2) 3) 4) 5) Disconnect the power plug. Remove the copyboard glass. Remove the upper rear cover. Move the scanner unit to the center. Remove the two screws q, and remove the light-blocking plate w. 2. Removing the Blank Exposure Assembly 1) 2) 3) 4) Open the front cover. Pull the open/close lever to open the body. Remove the inside cover. Remove the exhaust fan and the cartridge.
MECHANICAL SYSTEM 3. Removing the Blank Exposure Lamp 1) Remove the blank exposure lamp. (See “Removing the Blank Exposure Assembly.”) 2) Remove the four screws q, and disconnect the connector w. 1 1 4. Removing the Blank Shutter Solenoid 1) Remove the blank exposure assembly. 2) Remove the blank top plate, and disconnect the connector q. (See “Removing the Blank Exposure Assembly.”) 3) Remove the E-ring w, and remove the link arm e from the blank shutter.
MECHANICAL SYSTEM 6. Routing the Blank Shutter Cable Attach the spring the outside of the slide shutter. Slide shutter (rear) 8. Installing the Mirror Heater 1) Remove the copyboard glass. 2) Install the cord clamp q to the bottom plate of the lens mount. 3) Install the mirror heater e with a screw w. 2 3 Wind 3.5 items Slide shutter (front) Figure 4-410 1 7.
MECHANICAL SYSTEM 9. Installing the Lens Heater 1) Remove the copyboard glass and the lens hood. 2) Remove the three screws, and disconnect the two connectors; then, remove the original size sensor q together with its mount. 5) Set the mirror heater harness t to the cord guide. 5 Figure 4-416 6) Install the original size sensor mount, lens hood, and copyboard glass. 1 Figure 4-414 3) Install the lens heater w with a screw e. 4) Connect the connector r. 4 3 2 Figure 4-415 COPYRIGHT © 1998 CANON INC.
MECHANICAL SYSTEM V. CHARGING SYSTEM Caution: Take extra care not to damage the photosensitive drum. A. Drum Unit 1. Removing the Drum Unit 1) Open the front door. 2) Pull the developing assembly releasing lever q to the front, and turn it clockwise. 1 Caution: The photosensitive drum is highly susceptible to light, and exposure even to room lighting could lead to white spots or black bands on copies.
MECHANICAL SYSTEM B. Primary Charging Assembly 1. Removing the Primary Charging Unit 1) Remove the drum unit from the body. 2) Slide the locks q found on the top of the drum unit in the direction of the arrows. 2. Cleaning the Cleaning Pad and the Primary Charging Roller 1) Remove the primary charging assembly unit. 2) As in Figure 4-505, place the primary charging assembly, and clean the cleaning pad e with a cotton swab r or folded lint-free paper. Caution: • Dry-wipe only.
MECHANICAL SYSTEM 3. Positioning the Primary Charging Roller Cleaning Solenoid Loosen the two screws used to fix the solenoid e in place and move the solenoid e in the the direction of arrow B so that the distance l in Figure 4-507 is 5.5 ±0.2 mm when the joint q is butted against a of the solenoid support plate w. 1 2 B C. Transfer Charging Assembly 1. Removing the Transfer Roller 1) 2) 3) 4) Open the front door. Open the top body. Remove the static eliminator.
MECHANICAL SYSTEM D. Drum Heater* * This may not be available for sale in some areas. 4) Install the heater holder t to the transfer guide y with two screws r. 1. Installing the Drum Heater 6 1) Remove the transfer guide from the copier. 2) Install the cord clamp w to the heater holder q. 1 4 5 4 FIgure 4-511 5) Install the transfer guide to the copier. 6) Connect the connector u of the heater to the copier’s connector. 2 Figure 4-509 3) Put the heater unit e into the heater holder.
MECHANICAL SYSTEM VI. DEVELOPING SYSTEM 1) Remove the developing assembly from the copier. 2) Remove the four screws q, and remove the developing cover w. 1. Removing the Developing Assembly 1 1) Open the copier’s front door. 2) Operate the open/close lever to open the top body. 3) Turn the locking lever q clockwise to unlock the developing assembly. 4) Remove the screw w. 5) Pull the developing assembly e slowly to the front.
MECHANICAL SYSTEM 3. Removing the Developing Cylinder Side Seal 1) Remove the developing assembly from the copier. 2) Remove the blade assembly. 5) Remove the three E-rings u, and gear i, gear o, and gear !0. 7 Caution: In European model, there are two type of blade unit. If old type blade are attached, it can't be removed. Caution: The blade must be installed at high precision. Do not remove it in the field. If necessary, remove it intact on its mounting plate.
MECHANICAL SYSTEM 8) Remove the side seal !5. (both sides) 4. Installing the Side Seal and the Blade Assembly 1) Clean the area where the side seal will be installed with alcohol. 2) Attach the side seal as indicated in Figure 4611. 15 Figure 4-609 Figure 4-611 3) Check that the side seal and the container are in firm contact. 4) In European model, push the developing blade unit attachment section all the way against the upper side and secure it with the screw.
MECHANICAL SYSTEM VII. FIXING SYSTEM 1. Construction 2. Removing the Upper Fixing Unit 1) Open the front cover. 2) Open the top body. 3) Remove the two screws q, and remove the fixing assembly cover w. Oil application roller 1 Upper roller 2 Figure 4-702 Lower roller Figure 4-701 4) Disconnect the three connectors e, and remove the screw r. 4 3 Figure 4-703 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB.
MECHANICAL SYSTEM 5) Open the fixing shutter t with the screw driver inserted into the hole u, after lifting the fixing shutter. 6 6) Remove the four screws w, and remove the fixing cover (both front and rear). 7 2 5 Figure 4-706(front) Figure 4-704 6) Pull out the upper fixing unit slowly toward the rear. Caution: Do not touch the fixing roller. 3.
MECHANICAL SYSTEM 8) Push the thermal switch t in the direction of the arrow, and remove it. 11) Remove the E-ring !0 at the front, and remove the bush !1 and the bearing !2; then, pull out the upper roller. 10 11 12 5 Figure 4-708 Figure 4-711 9) Remove the screw y, and remove the metal plate u. 12) Remove the three E-rings !3 at the rear, and pull out the gear !4 and the bush !5. 15 14 6 7 13 13 13 Figure 4-709 Figure 4-712 10) Remove the screw i, and remove the thermistor o. 9 8 4.
MECHANICAL SYSTEM 5. Removing the Lower Fixing Unit 1) Remove the E-ring q, and remove the lower fixing unit w. 2 1 3 Figure 4-715 4) Remove the lower fixing roller r together with the bushing. Figure 4-713 Caution: Do not touch the surface of the fixing cleaning roller or the lower fixing roller. 6. Removing the Separation Claw/Fixing Cleaning Roller 1) Remove the front cover. 2) Remove the screw q, and remove the separation claw unit w.
MECHANICAL SYSTEM 7. Adjusting the Lower Fixing Roller Pressure (nip) If fixing faults are noted, make adjustments as follows: The nip is correct if it is as indicated in Figure 4718; otherwise, turn the bolt to adjust. Reference: The paper will be stopped halfway sandwiched between the fixing rollers; it will be discharged about 10 sec later. 8) Measure the nip. c A4 size Feeding direction b Center of paper b : 4.5 ± 0.5mm | a-c | : 0.
MECHANICAL SYSTEM VIII. ELECTRICAL A. DC Controller PCB 1. Removing the DC Controller PCB 1) Remove the lower rear cover. 2) Disconnect the connector from the DC controller. 3) Remove the six screws, and remove the DC controller PCB from the mounting plate. B. Composite Power Supply PCB 1. Removing the Composite Power Supply PCB 1) Remove the lower rear cover and the left cover. 2) Disconnect all connectors of the composite power supply PCB. 3) Disconnect J317 and J322 q of the DC controller PCB. 2.
MECHANICAL SYSTEM 5) Remove the grounding wire r, screw t, the remaining connectors,and cord guide hook y; then, remove the composite power supply PCB u. 6 4 5 7 Figure 4-803 C. AE Sensor PCB 1. Points to Note When Replacing the AE Sensor • After replacement, perform the following: q adjust AE COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
MECHANICAL SYSTEM 4–52 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
CHAPTER 5 INSTALLATION The machine is precisely adjusted and strictly inspected before shipment, and it is important to install the machine so that it retains its pre-shipment performance. The service person is expected to install the machine based on a full understanding of its mechanisms and run necessary checks after installation. I. SELECTING THE SITE ............................. 5-1 II. UNPACKING AND INSTALLING THE COPIER ..................................................... 5-2 A.
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
INSTALLATION I. SELECTING THE SITE Keep the following in mind when selecting the site of installation; if possible, pay a visit to the user’s before the delivery of the machine. • The site must provide a power outlet that may be used exclusively for the machine and that meets the rating ±10%. • The site must be 45.5° to 90.5°F (7.5° to 30°C) in temperature and 10% to 80% in humidity. In particular, avoid areas near water faucets, boilers, humidifiers, or refrigerators.
INSTALLATION II. UNPACKING AND INSTALLING THE COPIER When a metal part is brought in from a cold to warm environment, droplets of water can develop on the surface of the part. This phenomenon is called condensation, and condensation in a copier can lead to faulty images. If the copier has been moved from a cold to warm place, leave it alone for about one hour or more before unpacking it. A. Unpacking and Removing Fixings Step Work Remarks 1 Unpack the copier.
INSTALLATION Step Work 6 Open the front cover, and push the lever found on the left side up in the direction of the arrow to open the copier’s top body. 7 Pull up the spacer (front and rear, 1 pc. each) of the fixing roller until a click is heard. 8 Remove the two pieces of cardboard (spacer) from the feeding assembly. COPYRIGHT © 1998 CANON INC. Remarks Spacer Spacer Spacer Spacer Spacer CANON NP6621 REV.0 FEB.
INSTALLATION Step Work Remarks 9 Pull the developing locking lever toward the front, and turn it clockwise to release it. 10 Remove the knob, and remove the dummy drum from the copier. (Keep the knob for later.) 11 Remove the screw, and remove the developing assembly stopper. 12 Remove the stopper from the developing assembly. 13 Remove the developing assembly, and check that the developing cylinder is free of scratches or dirt.
INSTALLATION B. Turning On the Copier Step Work 1 Connect the power plug to the power outlet. 2 Turn on the power switch. 3 Turn off the power switch. 4 Supply toner according to the instructions given on the toner supply label attached behind the front door. 5 Release the developing assembly by the developing assembly locking lever. 6 Install the drum unit. 7 Lock the developing assembly, and close the copier’s top unit.
INSTALLATION Step Work 10 Execute ‘No. 401’ in service mode. • Press the service mode switch (SW850), ‘4’ on the keypad, AE Key, and Start key in sequence. 11 Make sure that step 10 has been completed; then, turn off the power, and open the copier’s top unit. 12 Remove the static eliminator, and clean it with the static eliminator brush; then, set the static eliminator. 13 Turn on the power. 14 Only the European model, in case of the other model, go to step 15. Execute ‘No. 412’ in service mode.
INSTALLATION C. Checking the Images and Operations Step Work Checks/Remarks 1 Place the Test Sheet on the copyboard, and check the copies. • Make sure there is no abnormal sound. • Check the copy images for each standard reproduction ratio. • Make sure that as many copies as specified are made normally. • If the copy image is faulty, perform the “Image Adjustment Basic Procedure.”(See service Handbook P.1-5.) 2 Make copies in manual mode. Make sure that the copying operation is normal.
INSTALLATION D. Attaching the Drum Unit Step Work 1 Unpack the drum unit, and remove the light-blocking sheet. 2 Remove the primary charging roller releasing spacer. Checks/Remarks Releasing spacer Releasing spacer Take care not to damage the surface of the drum and not to touch the primary charging roller. 3 Set the drum unit to the copier, and fix it in position using the knob used to keep the dummy drum. Knob Drum unit Be sure to insert the drum unit straight along the copier’s rail.
INSTALLATION E. Changing the Cassette Size Change the cassette size to suit the user’s needs. 1) Slide the cassette out of the copier. 2) Move the length plate inside the cassette to suit the length of the paper size. 4) Move the paper size lever found toward the front of the cassette so that it is aligned with the size of the paper to be used.
INSTALLATION 6) Set the paper size plates selected in step 4). After setting the size plate, make sure it corresponds to the paper size you have selected. Figure 5-205 Caution: If you are setting the plate for the position representing the universal (U) cassette, you must perform the work described for “universal cassette paper size setting (505); see p. 3-131.
INSTALLATION III. RELOCATING THE COPIER If you must relocate the copier by truck or using other means of transportation, perform the following work: Step Work 1 Move the lens to the Direct position. 2 Take out the drum unit. 3 Fix the scanner in place. 4 Tape the front door and delivery assembly in place. 5 Place 11 × 17/A3 copy paper on the copyboard glass, and tape the copyboard cover in place. COPYRIGHT © 1998 CANON INC.
INSTALLATION IV. REPLACING THE DRUM UNIT Go through the following when replacing the drum unit: Step Work 1 Turn off the copier, and open the front door and the copier’s top unit. 2 Release the developing assembly, and remove the knob to remove the drum unit. 3 Unpack the new drum unit, and remove the light-blocking sheet. 4 Remove the primary charging roller releasing spacer.
INSTALLATION Step Work 8 Turn on the door switch using the door switch actuator; then, shift the power switch to ‘ON’. 9 Only the European model, in case of the other model, go to next step. Select service mode No. 313/314, and enter the settings recorded on the drum label. To select service mode, • Press the service mode switch (SW850) with a hex key. Select ‘3’ of the mode by pressing ‘3’ on the keypad and AE key; then, select ‘No. 3 xx’ by pressing ‘x’ and ‘x’ on the keypad and the Start key.
INSTALLATION V. INSTALLING THE CONTROL CARD IV N 9) Fix the Control Card IV N to the copier using a screw w (M4×12); at the time, be sure that the copier’s emboss e is fitted in the hole in the Control Card IV N. Caution: Be sure to disconnect the copier’s power plug before starting the installation work. 1) Open the front cover 2) Open the copier’s top body by operating its open/close lever. 3) Detach the front cover. 4) Take out the cartridge. 5) Detach the inside cover.
INSTALLATION 11) Connect the connector t of the Control Card IV N. t Figure 5-504 12) Connect the copier’s power plug, and turn on its power switch to check the operation of the Control Card IV N. COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
INSTALLATION VI. CASSETTE HEATER KIT 5 INSTALLATION PROCEDURE A. Unpacking Open the shipping box, and check to make sure that none of the parts shown in Fig. 5-601 is missing. 2 3 4 6 7 5 1 Figure 5-601 q w e r 5–16 Cassette Heater .................... Mounting plate 1 .................... Mounting plate 2 .................... Relay harness ....................... 1 1 1 1 COPYRIGHT © 1998 CANON INC. t Cord clamp ............................ 1 y Binding screw (black; M4×6) .
INSTALLATION B. Installation (to copying machine) 3) Install the mounting plate 1 to the cassette heater with two screws (black; M4×6). Mounting plate 1 1) Remove both top and bottom cassettes, and remove the front cover, front lower cover, and rear cover. Rear cover Screws Front cover Front lower cover Figure 5-602 Cassette heater Figure 5-604 2) Disconnect the connector for the heater from the copier’s rear, and remove the connector support member.
INSTALLATION 5) Put the screw back, and tighten it. 6) Insert the bend found at the rear of the heater into the heater mounting hole in the copier’s rear plate. 8) Connect the copier’s connector to the connector on the cassette heater visible at the rear of the copier. Heater mounting hole Connector on the heater Connector on the copier Cassette heater Figure 5-606 7) Fix the mounting plate 1 in place to the copier’s side plate with two screws (white; M3×6).
INSTALLATION 12) Turn on the copier’s cassette heater switch. (Of the two switches, one at the rear; the heater will be supplied with power when the copier is switched off.) Switch for the cassette heater Figure 5-609 13) Close the top unit of the copier. COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
INSTALLATION C. Installation (to a Cassette Feeding Module-A2/B2/ Cassette Feeding Unit-K1) 1) Remove the cassettes and all rear covers from the cassette feeding unit/pedestal. 2) Remove the copier’s rear cover. 3) Install the mounting plate 2 to the cassette heater with two screws (black; M4×6). Mounting plate 2 Figure 5-611 Screw 5) Open the cover on the front of the cassette feeding unit/module, and fix the mounting plate 2 in place to the front side plate with two screws (white; M3×6).
INSTALLATION 6) Close the cover. 7) Connect the connector on the relay harness to the connector of the cassette heater (rear side plate of the cassette feeding unit/module). (Connect the side where the harness is bundled with a tie-wrap.) • Cassette Feeding Module-B2 Tie-wrap Cord clamp Figure 5-615 9) Arrange the relay harness on the rear side plate as indicated (Cassette Feeding Unit-K1).
INSTALLATION 10) Lead the other connector on the relay harness through the copier’s bottom plate as shown. 12) Fix the relay harness in place to the rear side plate with the cord clamp. • Cassette Feeding Unit-K1 Copier's connector Molded member Copier's base plate Figure 5-617 Figure 5-619 11) Connect the connector on the relay harness with the copier’s connector.
INSTALLATION • Cassette Feeding Module-A2 13) Install the rear cover of the cassette pedestal and all covers. 14) Install the copier’s rear cover. Figure 5-620 Caution: Make sure that the relay harness is outside the area indicated by dashed lines to prevent it from interfering with the feet of the cassette. • Cassette Feeding Module-B2 Figure 5-621 Caution: Make sure that the relay harness is outside the area indicated by dashed lines to prevent it from interfering with the feet of the cassette.
INSTALLATION VII. CASSETTE HEATER KIT 7 INSTALLATION PROCEDURE A. Unpacking Open the shipping box, and make sure that none of the parts indicated Fig. 5-701 is missing. 2 1 4 3 5 6 7 8 Figure 5-701 q w e r 5–24 Cassette Heater .................... 1 Power cord mount ................. 1 Stay ....................................... 1 Relay harness ....................... 1 COPYRIGHT © 1998 CANON INC. t y u i Binding screw (white; M4×6) . TP screw (black; M4×6) ........ Cord clamp .............
INSTALLATION B. Installation 1) Remove the copier’s bottom cassette. 2) Remove the two screws, and remove the copier’s front right cover; then, disengage the snap, and remove the front lower cover. 4) Remove the paper deck. 5) Install the power cord mount. (Use the mounting screw removed from the face plate.) Front right cover Power cord mount Mounting screws Figure 5-704 Front lower cover 6) Install the stay with one mounting screw (white; M4×6).
INSTALLATION 7) Connect the relay harness to the heater. 9) Connect the relay harness to the connector on the power cord mount, and keep it in place with two cord guides. Relay harness Cord guides Figure 5-706 Figure 5-708 8) Install the heater to the paper deck, and fix it in place with a screw (black; M4×6). 10) Install the left cover, front left cover, front upper over, and rear cover. 11) Install the copier’s front lower cover and front right cover. 12) Slide in the copier’s bottom cassette.
INSTALLATION C. Attaching the Ratings Label 1) Peel the backing sheet from the label, and attach the label to the rear cover of the pedestal as indicated. 7 mm 6 mm Figure 5-709 2) Connect the heater’s power plug to the power outlet. 3) Turn on the heater’s power switch. COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
INSTALLATION VIII.INSTALLING THE REMOTE DIAGNOSTIC DEVICE II Caution: This model may not be available for sale in some areas. Caution: Keep the following in mind when installing the RDD to the copier: A. Unpacking 1. This Accessory is to be installed by a qualified personal. 2. Make sure the copier has been properly installed before starting the work. 3. Keep the copier’s power cord disconnected during the work. 4. Be sure to use the appropriate screws (length, diameter). 5.
INSTALLATION 3) Remove the two screws y, and detach the face cover t from the copier’s rear cover. t y o i y Fig. 5-804 4) Open the ferrite core u, wind the RDD’s cable i three times, and close the ferrite core u; thereafter, connect the cable o on the copier side and the RDD’s cable i. u Note: If a conversion connector is found on the cable !1 from the copier, remove it. o Fig. 5-806 5) Fix the RDD in place on the copier’s rear cover with four screws y; use the screws removed from the copier.
INSTALLATION !0 8) If the ROM IC6 !22 is mounted on the RDD’s PCB, shift bit 7 of the DIP switch 2 !3 to ON; otherwise, shift bit 7 of the DIP switch 2 to OFF. Note: 1. If the ROM (IC6; !2) is not mounted, you need not mount it. 2. If you are mounting or replacing the ROM (IC6; !2 for upgrading the RDD, be sure to shift bit 7 of the DIP switch 2 !3 to ON. 1 2 3 4 5 6 7 8 6) Remove the slack from the cable between the copier and the RDD; keep the excess cable to the RDD using the harness band !0.
INSTALLATION Switch Setting SW3-1 AII SW3-2 OFF SW3-3 ON 11) Reset the RDD’s RAM. Set the bits on the DIP switch 2 !6 on the RDD’s PCB as indicated in the table, and press the push switch 4 !7 to make sure that LED5 !8 (red) comes on.
INSTALLATION 12) After making sure that LED5 !8 (red) has come on, set the bits on the DIP switch 2 !6 on the RDD’s PCB as indicated in the table, and press the push switch 4 !7 to make sure that LED5 !8 (red) goes out, indicating that the RAM has been reset. bits on SW2 Setting SW2-1 OFF SW2-2 OFF SW2-3 OFF SW2-4 ON SW2-5 OFF SW2-6 ON SW2-7 See step 9). SW2-8 OFF 14) Connect the RDD to the telephone line.
INSTALLATION 16) Call up the service station to check if the initial settings have been successfully made; if the attempt has failed, reset the RAM once again starting with step 11) through 13). 19) Press the copier’ COPY START key to make sure that LED3 @6 (pink) flashes each time a copy is delivered. @6 Important: You must confirm that the RDD’s settings are correct by calling the service station. 17) Check that you can place a telephone call from the RDD to the computer in the service station.
INSTALLATION 5–34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
CHAPTER 6 MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS ....... 6-1 A. Periodically Replaced Parts ................ 6-1 II. DURABLES AND CONSUMABLES .......... 6-2 A. Copier .................................................. 6-2 B. Cassette Feeding Module-B2, Cassette Feeding Module-A2, and Cassette Feeding Unit-K1 ............ 6-3 COPYRIGHT © 1998 CANON INC. C. Paper Deck Pedestal-K1 ..................... 6-3 III. BASIC SERVICING ................................... 6-4 IV. SERVICING CHART ..
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS Of the parts used in the machine, those given in the table must be replaced on a periodical basis to maintain a specific level of machine performance. (You must replace them regardless of the absence of exterior wear or damage, as they significantly affect the machine performance should they fail.) Schedule a visit so that you may replace the parts during periodical servicing. A. Periodically Replaced Parts No.
MAINTENANCE AND SERVICING II. DURABLES AND CONSUMABLES Of the parts used in the machine, those given in the table may prove to require replacement once or more over the period of warranty because of wear or damage; replace them as necessary referring to the guide. A. Copier No. As of FEB. 1998 Parts name Parts No. Q’ty Life (copies) Remarks 1 Pick-up roller FB3-8771-00P 2 100,000 Actual copies made. 2 Pick-up separation pad FG5-6792-020 2 100,000 Actual copies made.
MAINTENANCE AND SERVICING B. Cassette Feeding Module-B2, Cassette Feeding Module-A2, and Cassette Feeding Unit-K1 As of FEB. 1998 No. Parts name Parts No. Q’ty Life (copies) Remarks 1 Pick-up roller FB2-2251-000 1 through 3 100,000 Actual copies made. 2 Pick-up separation pad FG5-3614-000 1 through 3 100,000 Actual copies made. Note: The above values are estimates only and subject to change based on future data. C. Paper Deck Pedestal-K1 As of FEB. 1998 No.
MAINTENANCE AND SERVICING III. BASIC SERVICING The machine does not have items to be serviced on a scheduled basis. However, it is desirable to go through the steps in the table when paying a visit to the user. Step Work Items 1 Meet the person in charge. Check the general condition. 2 Make test copies in DIRECT, REDUCE, ENLARGE. Check the following: a. image density b. soiling of white background c. clarity of characters d. leading edge nonimage width e. left/right margin f.
MAINTENANCE AND SERVICING IV. SERVICING CHART Caution: Do not use solvents or oils other than those indicated. A. Scheduled Maintenance Work : clean Parts Unit External Control Pick-up assembly Scanner drive assembly : replace ✩ : lubricate every every every every 20,000 60,000 100,000 year Copyboard glass : adjust : check or clean Remarks Use alcohol. Pick-up roller ✩ Scanning rail Use alcohol; then, apply lubricant. Transfer guide assembly Feeding assembly Use a moist cloth.
MAINTENANCE AND SERVICING 6–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX A. B. C. D. E. F. G. H. I. J. K. GENERAL TIMING CHART ..................... A-1 SIGNALS AND ABBREVIATIONS ........... A-2 GENERAL CIRCUIT DIAGRAM ............... A-5 DC CONTROLLER CIRCUIT DIAGRAM ... A-7 COMPOSITE POWER SUPPLY CIRCUIT DIAGRAM ............................................... A-21 CONTROL PANEL KEYPCB ................. A-27 AE SENSOR CIRCUIT DIAGRAM ......... A-31 INTENSITY SENSOR CIRCUIT DIAGRAM ...............................................
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
A.
B. SIGNALS AND ABBREVIATIONS 1.
POWER SWITCH command RIGHT DOOR OPEN signal REGISTRATION CLUTCH DRIVE command DUPLEXING UNIT REGISTRATION ROLLER HOME POSITION DETECTION signal REGISTRATION PAPER DETECTION signal SCANNER MOTOR PULSE command A/A* SCANNER MOTOR PULSE command B/B* SCANNER HOME POSITION DETECTION signal CASSETTE4/5 SELECT signal ORIGINAL SIZE1 DETECTION signal ORIGINAL SIZE2 DETECTION signal ORIGINAL SIZE3 DETECTION signal ORIGINAL SIZE4 DETECTION signal DUPLEXING UNIT CHANGE SOLENOID DRIVE signal DUPLEXING UNIT FLAPPER SOLENO
APPENDIX A–4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX C. GENERAL CIRCUIT DIAGRAM not available COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX A–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
VCC D. DC CONTROLLER CIRCUIT DIAGRAM R301 ZERCRSS + C391 CSGA CSIPC CSRAM CSROM C392 PI[0..7] PI[0..7] C353 TP[2..15] C301 TP[2..15] VCC VCC VCC P10 P11 P12 P13 P14 P15 P16 P17 TP2 TP3 TP4 TP5 TP6 TP7 L1 DC Controller (1/14) LINK I XR331.SCH I XR332.SCH I XR333.SCH I XR334.SCH I XR335.SCH I XR336.SCH I XR337.SCH I XR338.SCH I XR339.SCH I XR3310.SCH I XR3311.SCH I XR3312.SCH I XR3313.
DC Controller (2/14) VCC ADD[1..18] VCC R401 C314 Q307 1 VPP R402 Q306 MR RES Q305 ADD18 ADD17 ADD16 ADD15 ADD14 ADD13 ADD12 ADD11 ADD10 ADD9 ADD8 ADD7 ADD6 ADD5 ADD4 ADD3 ADD2 ADD1 RES VCC R354 Q398 WATDG Q399 VCC R356 39 38 37 36 35 34 33 32 31 29 28 27 26 25 24 23 22 21 A17 A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 VCC 40 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 11 VSS DATA[0..15] DATA[0..
DC Controller (3/14) VCC L5 DATA[8..15] INDUCTOR C316 ADD[0..7] R360 ADD6 ADD5 ADD4 ADD3 ADD2 ADD1 ADD0 DATA15 DATA14 DATA13 DATA12 DATA11 DATA10 WR RD CSIPC PD[0..7] PD[0..7] 51 52 53 54 55 56 57 58 59 60 61 62 63 64 VCC ADD[0..
DC Controller (4/14) R383 RES PT40 C324 VCC C328 PT[60..67] PT[60..67] VCC PT60 PT61 PT62 PT63 P[30..37] PT64 PT65 PT66 PT67 VCC PT41 P[30..37] VSS PT57 OUSTPD OUSTPB OUSTPB OUSTPA RGSTPD RGSTPC RGSTPB VDD RGSTPA DXSTP DXSTP DXSTP DXSTP RESET PT40 VDD PT41 PT42 PT43 PT44 PT45 PT46 PT47 LC0 LC1 LC2 LC3 VSS LC4 LC5 LC6 LC7 LCRS VDD PT[0..7] PT57 PC[0..12] P37 P36 P35 P34 P33 P32 P31 P30 PC[0..
DC Controller (5/14) DUPLEX-COMA +24VF2 DUPLEX-COMB +24VF1 DUPLEX-A +34V C394 F303 JUMPER R409 + C393 R386 TP8 Q334 Q323 R387 VBG D303 C331 TP7 VBG C332 + VCC Q322 DUPLEX-A C388 Download service manual and resetter printer at http://printer1.blogspot.
DC Controller (6/14) +24V2 +24V2 VCC PT23 Q344 ZD303 D315 OPCNTD R416 Q345 OPCNTPR 9 1 R415 Q346 R417 PT10 VCC ZD302 16 SLNOID MF PUCL VBG Q338A 8 PE4 3 PT20 +24V2 14 DSR-CL Q338C MTR-COM ZD304 OPTENB 15 9 2 PT12 Q352 RGCL Q338B PE5 1 16 CL1 Q401A 8 VBG 4 PT16 13 LWPU-CL Q338D PE6 2 15 CL2 Q401B 6 11 +24V2 Q338F OPTPHA 3 14 VCC CL3 D313 Q401C 7 PT22 10 Q341 Q338G Q342 OPTPHB 5 TCNTD R413 4 13 TCNTRPR Q343 R414 CL4 ZD301 Q401D 12 VBG Q3
DC Controller (7/14) VCC 2 PT51 15 CHNG-SL Q348B PT13 PR-EXP R425 13 TRCLSL MMD R420 Q348D 5 PT25 Q359 AST-CNTP 12 MFMRLSL PT17 VBG Download service manual and resetter printer at http://printer1.blogspot.
DC Controller (8/14) VCC 2 PT51 15 CHNG-SL Q348B PT13 PR-EXP R425 13 TRCLSL MMD R420 Q348D 5 PT25 Q359 AST-CNTP 12 MFMRLSL PT17 VBG Q348E PE2 Q356 EPD-SL 3 14 Q348C R385 PT54 CP-DATA0 6 PD2 Q327 11 PE1 Q348F 7 Q360 VBG CRCLSL 10 PD1 Q348G ZD305 CP-REQ R591 +24V2 9 PT52 1 PE0 16 Q405 Q357 PT50 8 Q348A VBG VBG EXFAN R421 PT24 Q361 ZD306 VCC +24V2 VBG PD6 9 PT26 1 16 R575 R575 Q362 BLNKST-SL R422 CSCEP 8 Q349A VBG PT11 3 14 PD5 PUCL 5 PD0
DC Controller (9/14) R486 R485 R483 R482 R481 R480 PC[0..
DC Controller (10/14) PT[0..7] P[30..37] VCC PT[0..7] Q381H P[30..
DC Controller (11/14) KS0 M6 R451 R452 R454 R455 SIZE1 M7 R456 SIZE2 M8 D325 M6 D326 M7 D327 M8 PAPER1 M9 FEED1 M10 MTRLOK M11 SIZE3 SIZE4 CNCT1 Download service manual and resetter printer at http://printer1.blogspot.
DC Controller (12/14) VCC M-TH VCC HTNG HTNG C351 VCC R439 R407 R429 5 + Q386B 7 R567 6 – R440 D364 PT41 Q354 R408 R431 D312 Q331B 7 5 + 4 C377 VCC VCC R553 6 – 5 + M-TH 4 Q389 Q329B 7 8 – R406 +24V2 8 6 HEAT-PROT R557 D328 R555 5 + Q328B 7 6 – 8 3 + R430 R453 HTNG Q386A 1 C354 R433 HTNG R436 2 – 4 D336 R554 HTOFFOUT 8 2 R432 Q331A 1 R435 2 – 3 + R434 4 A-TH 8 – VCC Q329A 1 D314 3 + 4 D368 Q326 +24V2 +24V2 R438 R437 L-CHECK R571
DC Controller (13/14) J301 MOLEX 53258-0620 VCC 1 2 3 4 5 6 VCC +34V GND34 GND J307 VBG J302 SC-B SC-B SC-A SC-A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 HEAT-PROT TNEMP LAMP-CHECK CP-REQ FL-S MR CP-DATA0 CP-ACK CP-SIN CP-SOUT CP-SCLK AC-MNTR GND 1 2 3 4 5 J310 VCC LENS-HP GND +24V2 OPT-FAN VBG AE-REF AE-DATA +24V2 GND COVDT VCC 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 APGND VCC APS-L4 APGND VCC APS-L3 APGND VCC APS-L2 APGND VCC APS-L1 20 19 18 17 16 15 14 13 12 11 DSR-CL +24V
DC Controller (14/14) F302 J318 +24V2 J313 1 2 3 4 D-TXD GND D-RXD GND KS2 UPCSZ-1 UPCSZ-2 UPCSZ-3 UPCSZ-4 GND KS3 LWCSZ-1 LWCSZ-2 LWCSZ-3 LWCSZ-4 GND 1 2 3 4 5 6 7 8 9 10 11 12 J324 MAIN-TH GND +24V2 SOL-OIL GND AUX-TH CRCLSL +24V2 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 CHNG-SL +24V2 LENS-COMB LENS-B LENS-B LENS-COMA LENS-A LENS-A J351 DIST1 DIST2 DIST3 GND GND 1 2 3 4 5 J314 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VCC CSEEP EEP-SCLK EEP-SI EEP-SO GND +24V2 PAPFAN VCC DERS GND VCC PU-FEDDT GND J319
E.
Composite Power Supply PCB (2/6) 36V R24 3 +30VSEC R25 2 5 1 4 6 2 3 5 6 2 3 11 10 14 15 U2A C27 R31 R42 C28 VFEEDBK 6 D14 R32 C36 R45 C29 3 U3 R33 R34 1 U4 C139 3 +24VSEC 1 2 R36 D15 R47 R38 R35 + C31 5 C33 4 3 U2B C35 13 R43 +5FBT + - R44 + D16 2 C32 12 + - R37 R39 3 2 C30 U2D 10 C24 1 24V -BATT 11 + - + C23 12 R30 R41 7 C26 L3 D13 R40 + C25 1 R26 3 24V R27 24V R28 R29 C34 D17 12 + R208 C37 R51 R52 24V MRES R49 R2
Composite Power Supply PCB (3/6) 24V J2 F4 2 1 R65 R64 R66 C51 R67 Q14 C53 Q12 R69 AC-BCAS MRES Q13 H.V.GENERATOR Download service manual and resetter printer at http://printer1.blogspot.
Composite Power Supply PCB (4/6) DISCHARGE C73 R100 C72 R101 MV-L D30 D28 D35 D31 D29 D32 D33 D34 C74 MV-H R102 C75 C76 J4 C77 +5FBT R103 Q21 R104 D37 24V C78 D36 R105 C79 R108 R106 R107 J5 R109 + - 4 +5FBT 3 D38 2 R111 U8A J-CTRL HEADER 17 J-LVL-CTRL J-CTRL BIAS-S P-CTRL-S ACBIAS-ON P-OUR-S T-REV-ON T-FV-ON T-FV-S T-CTRL-S CP-SCLK CP-SOUT CP-SIN 24V 4 3 2 1 J8 +5FBT CP-ACKM CP-BATAO 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 R113 R114 R115 J-LVL-CTRL Q22 24V C81 R1
Composite Power Supply PCB (5/6) T MAX -6.0KV <-20 UA> T TYP.
24V R213 D58 R205 15V R159 R171 24VAUX 2 4 1 3 2 3 D62 ZD6 R157 C107 R169 R160 R219 D55 R166 Q47 ZD5 R165 5 2 3 4 6 ZERO-CROSS C109 R175 C108 + 2 - 6 1 5 Q32 U13B Q33 7 R176 R181 R179 R177 D79 1 6 2 5 3 4 ZD7 C136 C113 R182 FL-LIGHT-D U15 4 R174 3 U13A 8 + R178 24V R215 15V 24VAUX L6 Q34 D61 8 R167 R214 24VAUX Q48 R163 R212 U16 1 4 24VAUX R173 D78 R168 R161 R172 R170 Q39 R162 24VAUX Q40 D56 D57 R164 D63 24V HOT-LINE C
F. CONTROL PANEL KEY PCB Control Panel Key PCB (1/3) DG2C ILINK I TAST1.SCH I TAST2.
S14 S14 D812 S13 S13 L860 S12 S12 L883 S11 S11 L868 S10 S10 L869 S9 S9 L864 S8 S8 L861 S7 S7 L881 S6 S6 L889 S5 S5 L888 S4 S4 L887 S3 S3 L886 S2 S2 L885 L882 L880 D811 L862 L851 L838 L816 L815 L814 L884 L871 L870 L867 L866 L865 L863 L853 D810 L856 L855 L845 L828 L827 L826 L858 L850 L849 L837 L834 L833 L832 L893 D809 L854 L842 L841 L822 L821 L820 L892 L891 L890 L872 L804 L803 L802 L801 S1 S1 CANON NP6621 REV.0 FEB.
Control Panel Key PCB (3/3) VCC VCC R832 R816 Q800 1 2 3 4 5 R833 KS0 DG0 Q808 DG0B DG0C D800 SW804 SW803 SW802 SW807 SW806 VCC Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX A–30 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX G. AE SENSOR CIRCUIT DIAGRAM +24V 1 R601 J601 R603 +24V R602 PD601 2 3 + 8 R605 1 4 2 J601 AEDATA J601 AEREF C601 Q601 +24V 8 7 4 + 6 R604 3 5 Q601 C602 4 COPYRIGHT © 1998 CANON INC. J601 CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX H. INTENSITY SENSOR CIRCUIT DIAGRAM D402 D401 +5V R402 Q401 R401 1 J402 4 HTON 1 2 3 GND 2 +5V HTON GND HTTRIG J401 1 4 3 2 R403 D404 D403 WHITE J403 1 2 W1 R404 L401 140uH 7A Q403 3 1 C402 FROM POWER SUPPLY 1 HTTRIG 4 5 3 2 W2 AC INPUT CABLE Q402 6 2 GND R406 R405 C401 BLACK A–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
APPENDIX 3 2 1 2 ADJ- ADJ+ + +24V 4 8 1 R769 J752 TONER LEVEL DETECTION CIRCUIT DIAGRAM J752 I.
APPENDIX J.
APPENDIX K.
APPENDIX Driver Circuit Diagram (2/2) 6 B J114 5 B J114 4 CON B J114 3 A J114 2 A J114 1 COM A J114 Paper Feed Motor + C100 R102 Q102 +34V C110 C112 C109 C111 R101 C106 +5V R132 C108 R106 R109 R110 Q101 1 3 5 7 9 11 13 15 17 +5V OUTA TdA VrefA GND INA INA VSA OUTA RSA RSB OUTB VSB TdB VrefB GND INB INB OUTB 2 4 6 8 10 12 14 16 18 R108 R131 R107 C107 +5V Q103 R103 +5V +5V Q104 R104 R105 MTR-B MTR-A MTR-COM C105 from A502 A–36 COPYRIGHT © 1998 CANON INC.
APPENDIX L. CASSETTE FEEDING MODULE-A2 GENERAL CIRCUIT DIAGRAM Paper Size Detector1 PCB2 Paper Detector1 PS2 Feed Detector1 PS1 7 9 10 11 12 17 18 19 20 25 26 27 28 13 14 15 16 21 24 GND FEED1 CLUTCH1 PAPER1 CNCT1 SIZE1 SIZE2 SIZE3 SIZE4 KS4 MTR-COM MTR-A MTR-B DROPN FEED2 CLUTCH2 PAPER2 CNCT2 KS5 13 12 11 10 9 8 7 6 5 4 3 2 1 7 N.
APPENDIX M.
APPENDIX Drivcr Circuit Diagram (2/2) 6 B J114 5 B J114 4 CON B J114 3 A J114 2 A J114 1 COM A J114 Paper Feed Motor + C100 R102 Q102 +34V C110 C112 C109 C111 R101 C106 +5V C108 R106 R132 R109 R110 Q101 1 3 5 7 9 11 13 15 17 +5V OUTA TdA VrefA GND INA INA VSA OUTA RSA RSB OUTB VSB TdB VrefB GND INB INB OUTB 2 4 6 8 10 12 14 16 18 R108 R131 R107 C107 +5V Q103 R103 +5V +5V Q104 R104 R105 MTR-B MTR-A MTR-COM C105 from A502 COPYRIGHT © 1998 CANON INC.
APPENDIX A–40 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
N.
O. CASSETTE FEEDING UNIT-K1 R112 R121 R122 J130 1 5VF3 J130 2 GND J130 3 C5VPD J130 4 5VP3 J130 5 GND J130 6 C4/5PD J130 7 CS4/CS5 J130 8 C4SZ1/C5SZ1 J130 9 C4SZ2/C5SZ2 J130 10 C4SZ3/C5SZ3 J130 11 C4SZ4/C5SZ4 J130 12 J130 13 N.
Cassette Feeding Unit-K1 (2/3) +5V SELECT3 +5V Q105 R106 CLUTCH2/3 Q110 17 CLUTCH2 3 R124 18 R134 Q124 Q110 2 Download service manual and resetter printer at http://printer1.blogspot.com 19 CLUTCH3 Q134 1 +5V Q125 PAPER2/3 Q110 5 R125 PAPER2 15 19 +5V +5V 16 20 C110 Q110 Q135 Q110 to A502 R135 10 VCC GND PAPER3 4 1 to A502 +5V Q110 KS5/6 13 7 Q126 KS5 19 +5V Q110 6 14 Q136 KS6 1 Q110 11 9 N.C.
Cassette Feeding Unit-K1 (3/3) +34V +5V R210 R207 R208 R201 MTR-COM1 Q202 R202 MTR-A to A502 MTR-A +5V MTR-B Q201 R206 MTR-B 1 3 +5V C207 INA 7 VSA 11 R231 C205 VrefA 5 9 R205 OUTA RSA OUTB 13 TdB 15 GND 17 INB TdA 2 GND 4 INA 6 OUTA 8 RSB 10 VSB 12 VrefB 14 INB 16 OUTB 18 C206 C209 C210 R232 C211 C208 C212 COM A 1 A 2 A 3 COM B 4 B 5 B 6 COM A 1 A 2 A 3 COM B 4 B 5 B 6 J114 J114 J114 J114 J114 J114 +34V +5V R309 R310 R307 t
P.
1 +5V 2 +24Çu 3 GND 4 GND J102 5 FEED1 J102 6 CLUTCH1 7 PAPER1 8 CNCT1 9 DROPN 10 FEED2 J102 J102 J102 J102 J102 J102 J102 J102 J114 J114 7 J114 J114 J114 J114 J114 6 5 4 3 2 1 J113 J113 11 J113 10 J113 J113 9 8 J113 7 J113 6 J113 5 J113 4 J113 3 J113 2 1 J112 J112 9 J112 8 J112 J112 7 6 J112 5 J112 4 J112 3 J112 2 1 J111 J111 6 J111 J111 J111 5 4 3 DEPRL +24V CL9D +24V GND +24V SIZE1 GND KS5 DEOP GND CL8D +24V
APPENDIX R. SPECIAL TOOLS See the table for the special tools used to service the machine in addition to the standard tools set. 2 Mirror positioning tool (comes in pairs; front, rear) 3 Pulley clip (front, rear) COPYRIGHT © 1998 CANON INC. Remarks A TKN-0093-000 B For adjusting the distance between No. 1 and No. 2 mirrors. B For fixing the scanning cable in place. FY9-3009-040 A Door switch actuator Rank Shape A 1 Tool No. B Tool name B No. FY9-3010-000 CANON NP6621 REV.0 FEB.
APPENDIX S. SOLVENTS/OILS No. 1 Name Ethyl alcohol (Ethanol) Composition Use C2 H5 OH Cleaning: copyboard glass, mirror, etc. (CHZ3)2 CHOH CH3 • CO • C2H5 Methylethyl ketone Isopropyl alcohol (Isopropanol) Description • Flammable. • Use in a well-ventilated area. • Avoid breathing concentrated vapor. 2 MEK Removing toner or oil stains 3 Heat-resistant grease Lubricating the drive mechanisms; e.g., copyboard driving gear, fixing drive gear, fixing ass’y, etc.
Prepared by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION CANON INC. Printed in Japan REVISION 0 (FEB. 1998) (31625) 5-1, Hakusan 7-chome, Toride-shi Ibaraki, 302 -0023 Japan COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Download service manual and resetter printer at http://printer1.blogspot.
This publication is printed on 70% reprocessed paper. PRINTED IN JAPAN (IMPRIME AU JAPON) 0398S1.11-1 Download service manual and resetter printer at http://printer1.blogspot.
