Page 2 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.
Page 3 All service persons are expected to be thoroughly familiar with this Service Manual, the Service Handbook, and Service Information bulletins and be ready to respond to the needs of the user. © COPYRIGHT 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 4 Allows you to increase your paper supply through the addition of three paper cassettes. Paper Deck Pedestal-K1 Holds up to 1500 sheets of one type of paper. © COPYRIGHT 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 5: Table Of Contents
D. Operations of the Scanner in Page A. Pick-Up from the Machine ....3-57 Separation Mode ....... 3-34 B. Making Two-Sided Copies (1copy) ... 3-61 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 6 DEVICE II ..........5-28 V. INSTALLING THE CONTROL A. Unpacking .......... 5-28 CARD IV N ..........5-14 B. Installation to the Copier ....5-28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 7 DIAGRAM ..........A-33 S. SOLVENTS/OILS ........A-48 J. CASSETTE FEEDING MODULE-B2 GENERAL CIRCUIT DIAGRAM ..... A-34 K. CASSETTE FEEDING MODULE-B2 DRIVER CIRCUIT DIAGRAM ....A-35 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 9 III. NAMES OF PARTS ........1-7 B. Cleaning the Static Charge A. Exterior ..........1-7 Eliminator ........... 1-33 B. Cross Section ........1-8 VI. ROUTINE CLEANING ......1-34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 11: Features
3. Dependable high image quality. • The new HQ (high-quality) toner ensures faithful reproduction of solid black, text, and photos. • In addition to Canon’s own single-component toner projection development method, the use of auto image control (AIC) ensures stable reproduction of images.
Page 12: Specifications
Dry (toner projection) 2 cassettes Automatic Pick-up Multifeeder Manual Transfer Roller Separation Curvature + static eliminator Cleaning Cleaning blade Heat roller, 900W Fixing 1–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 13 *1 Canon recommended paper. *2 If in manual mode, remove curling before second feeding. *3 Fan out sheets before setting to eliminate adhesion. 1–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 14 Reproduction ratio REDUCE II 1: 1.414 ENLARGE I 1: 2.000 ENLARGE II 49% to 204 % (1% increments) ZOOM Table 1-201 Defaults Reproduction Ratio 1–4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 15: Cassette Feeding Module-B2/ Cassette Feeding Module-A2/Cassette Feeding Unit-K1
24.5 15.1 Cassette Feeding Module-B2: 9 kg/19.8 lb Weight Cassette Feeding Module-A2: 16 kg/32.3 lb Cassette Feeding Unit-KI: 29.6 kg/65.3 lb Table 1-203 1–5 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 16: Paper Deck Pedestal-K1
Power supply 34 VDC, 24 V, 5 V (supplied by copier) Weight 31.7 kg/70.0 lb Dimensions (W H; mm/in) 414/24.0 21.4 16.3 Table 1-204 1–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 17: Names Of Parts
Static eliminator Body open/close lever Copy tray Copy density correction volume Anti-condensation heater switch (rear) Static eliminator cleaner Fluorescent heater switch (front) Figure 1-302 1–7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 18: Cross Section
Feeding assembly Delivery paper deflecting plate No. 4 mirror Copyboard glass Delivery roller No. 5 mirror Drum unit Multifeeder pick-up roller Figure 1-303 1–8 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 19 GENERAL DESCRIPTION 2. Cassette Feeding Module-A2 Cassette 3 Cassette 4 pick-up roller Cassette 4 Drive roller Cassette 3 pick-up roller Feeding roller Figure 1-304 1–9 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 20 Vertical path roller 5 Cassette 3 pick-up roller Cassette 5 pick-up roller Cassette 4 pick-up roller Cassette 5 Vertical path roller 4 Figure 1-305 1–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 21 Deck separation roller Deck pick-up roller Lifter Deck vertical path roller Deck Vertical path roller 3 Deck feeding roller Figure 1-306 1–11 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 23: Basic Operation
Flashes when the original size needs to be specified. * Enter the original size with the Number keys and then press the OK key. Table 1-401 1–13 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 25 Press to set or change standard settings and custom settings according to specific user needs, and when adjusting and cleaning the copier. Table 1-403 1–15 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 26: Making Copies
• Press the key to select the copy paper size. • Press the keys to select a preset copy ratio. 1–16 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 27: Using The Stack Bypass
4. If you want the copy stock placed in the stack bypass to be selected when using Figure 1-409 Auto Paper Selection, specify the size. 1–17 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 28 6) Press the key until the stack bypass lights on the Paper Supply indicator. Auxiliary tray Autom.Paper Figure 1-411 Autom.Zoom ZOOM Figure 1-413 1–18 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 29: User Mode
The number for a function that can be set. The present setting for a certain function. •“ Autom.Zoom Figure 1-417 ZOOM Figure 1-416 1–19 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 30: Auto Clear Time
• The setting time is displayed in the Copy • The Auto Energy Saver Time is changed and quantity/Copy ratio display. “U02” is displayed. 1–20 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 31 (+0.4%) Y direction –2 Table 1-407 (+0.6%) • Fine adjustments ratios are displayed in the copy exposure display as follows: (+0.8%) (+1.0 %) 1–21 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 32 Auto Cassette Switching key turns red and copying operations ON/OFF setting is cleared and the copier cannot be initiated. returns to the normal copying mode. 1–22 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 34 , “U08” stops flashing and lights. pressed, the changed settings for Standard Copy Setting Store/Initialize are cleared and the copier returns to the normal copying mode. 1–24 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 35: Initializing User Mode
Additional Functions are not initial- ized, and the copier will return to the normal copying mode. 1–25 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 36: Warnings And Actions
2. Do not touch the purple colored surface of the drum; doing so will adversely affect the copy quality. Fixing assembly Knob Figure 1-503 1–26 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 38 • If both flash at the same time, check first before checking 1) Open the front door. Figure 1-514 Figure 1-516 1–28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 41 Also, some toner may stick to the toner cartridge, so be careful not to get toner on your clothes. 1–31 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 42 Note: Be sure to turn the cartridge until it locks into place. If it does not lock into place, toner may spill out. 1–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 43: Cleaning The Static Charge Eliminator
• You cannot operate the copier if the front door static charge eliminator. is open. Cleaning brush Figure1-539 1–33 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 44: Routine Cleaning
• Move the feeding belt with your hand as you wipe it with a cloth dampened with water or a mild cleaning agent. Then, wipe with a dry cloth. 1–34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 45 D. Step 2 (primary charging) ....2-3 II. AUXILIARY PROCESS ......2-8 A. Blank Exposure ........2-8 E. Step 3 (image exposure) ..... 2-4 F. Step 4 (development) ......2-4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 47: Image Formation
Primary Image exposure Pre-exposure Development Drum Transfer Manual feeding Delivery Separation Registration Fixing Cassette flow of copy paper rotation of drum Figure 2-102 2–1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 48: Latent Static Image Formation Block
Photo conducting layer Base Primary Dark area corona charg Pre-ex Figure 2-103 Image exposure -1000 posure (step 2) (step 3) (step1) Figure 2-104 2–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 49: Step 1 (Pre-Exposure)
The primary charging roller is a special roller and possesses different characteristics from the transfer roller. 2–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 52: Step 6 (Separation)
To prevent such a prob- lem, a positive charge is applied to the separation static eliminator, thereby weakening the static attraction for better separation. 2–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 54: Auxiliary Process
No. 6 mirror Shutter Reflecting plate Blank exposure light path (for area between sheets) Pre-exposure light path Photosensitive drum Figure 2-201 2–8 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 55 F. Paper Deck Pedestal-K1 ....3-76 B. Sequence of Operations G. Multifeeder ......... 3-82 (image formation system) ....3-36 H. Identifying the Size of the Cassette ... 3-85 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 56 VIII. STANDARDS AND ADJUSTMENTS ..3-127 B. Using Service Mode ......3-105 A. Electrical .......... 3-127 C. Control Display Mode (‘1’) ....3-107 D. I/O Mode (‘2’) ........3-110 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 57: Basic Operations
Cassette system 3 (accessory) Unit Cassette Unit Flow of high voltage/toner Flow of paper Flow of light Flow of electrical signals Figure 3-101 3–1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 58: Outline Of Electrical Circuitry
Cassette unit motor Motor Paper deck motor Sensor Cassette driver PCB/ Paper deck driver PCB Cassette pick-up clutch Deck pick-up clutch Figure 3-102 3–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 59: Inputs To The Dc Controller
Right door sensor RDOP* When the right door opens, '0'. - 11 PS 10 (when the light-blocking plate is not at PS10, '0') Figure 3-103 3–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 60 Vertical path roller 1 VP1P When paper is present at the vertical paper sensor - 14 PS 16 path roller 1 sensor, '1'. Figure 3-104 3–4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 61 Varies according to paper size. PS 21 J 310B- 2 SIZE1 Varies according to paper size. Original size sensor 1 PS 23 Figure 3-105 3–5 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 63 (starts service mode) SW850 Density correction volume J306-7 Adjusts the developing DC bias VR850 AE sensor adjustment volume VR851 AE sensor (2/2) Figure 3-107 3–7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 64: Outputs From The Dc Controller
Developing cylinder High-voltage Transfer roller circuit Static eliminator Toner level When '0', "ADD TONER" TEP* detection is indicated. sensor Antenna Sensor Figure 3-108 3–8 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 65 See p. 3-21. - 10 MLOCK* Main motor drive PCB J302 Scanner motor See p. 3-33. J324B Lens motor See p. 3-29. J324A Figure 3-109 3–9 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 66 DC controller PCB J326- 1 COM A COM B While M5 is rotating, alternates Duplexing between '1' and '0. unit motor (pulse signal) Figure 3-110 3–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 67 Paper deflecting When '0', the paper deflecting plate SL 8 SL8D* plate solenoid solenoid (SL8) turns ON. (duplexing unit inlet opened) Figure 3-111 3–11 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 68 Remote Diagnostic Device II When '0', a copy is counted. AST-CNTP* Transmission data (IPC communication) AST-TXD Reception data (IPC communication) AST-RXD Figure 3-112 3–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 69: Inputs To And Outputs From The Cassette Feeding Module-B2 Driver Pcb
J 114- 1 While M1cu is rotating, alternates +24V CMA* between '1' and '0'. Cassette M1cu (pulse signal) unit motor CMB* Figure 3-113 3–13 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 70: Inputs To And Outputs From The Cassette Feeding Module-A2 Driver Pcb
C3SZ3 - 11 C3SZ4 - 12 J 651 J 120 C4SZ1 Cassette 4 C4SZ2 size detection See p. 3-85. C4SZ3 C4SZ4 Figure 3-114 3–14 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 71 J 114- 1 While M1cu is rotating, +24V CMA* alternates between '1' and '0'. Cassette M1cu (pulse signal) unit motor CMB* Figure 3-115 3–15 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 72: Inputs To And Outputs From The Cassette Feeding Unit-K1 Driver Pcb
When '1', paper is present at the sensor. C5VPD path detection PS6cu (the light-blocking plate is at the sensor) J 130- 4 Cassette 5 paper detection PS7cu Figure 3-116 3–16 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 73 See p. 3-85. detection PCB C4SZ3/C5SZ3 C4SZ4/C5SZ4 J 238 J 130 Cassette 5 size - 10 detection PCB - 11 - 12 Figure 3-117 3–17 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 74 The cassette size is of cassette 5. of PS4/PS7cu, PS7cu is detected. *When '0', cassette 4 input/output is selected; when '1', cassette 5 input/output is selected. Figure 3-118 3–18 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 75 PS 6 (light-blocking plate is not at PS6) J 114- 1 SIZE 2 Deck size switch SIZE 1 See p. 3-81. Figure 3-119 3–19 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 76 When "0" , CL4 goes ON. Deck lifter drive clutch J114-6 Deck pick-up roller DEPRL* When "0" , SL1 goes ON. release solenoid Figure 3-120 3–20 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 77: Main Motor Control Circuit
J 312A J 502 current MLOCK* Phase control circuit Main motor Hall IC output MMCLK Reference signal Main motor driver PCB Figure 3-121 3–21 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 78: Basic Sequence Of Operations (2 Copies, Continuous, Ae)
STBY 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)
Page 79 Removes charges from (last rotation) copy paper moves past the delivery the surface of the copy. sensor. photosensitive drum as post copying processing. Table 3-101 3–23 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 80: Original Size Detecton Control
Copyboard cover open/ closed sensor PS11 DC controller PCB Figure 3-123 (A configuration) 3–24 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 81 Table 3-102. Copyboard cover Original 15°~13° PS11:ON Copyboard glass Level does Level changes not change Original detection 2 Original detection 1 Figure 3-124 3–25 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 82 Sensor level Size Does not change Does not change Changes Does not change Does not change Changes Changes Changes Table 3-102 (A configuration original) 3–26 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 83: Exposure System
Ratio button causes the scanner lens to move to the appropriate position to shorten the DIRECT first copy time.) REDUCE ENLARGE Figure 3-201 3–27 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 84 Change solenoid (SL1) Lens motor (M3) Relay gear Lens cable Lens Lens home position sensor (PS2) Enlargement Cam groove DC controller Figure 3-202 3–28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 85: Lens Motor Drive Circuit
5 V is supplied to keep the motor at rest. DC controller PCB J 324B- 1 LNSCB Motor drive voltage switching circuit LNSCA LNSA LNSA* LNSB (Q301) LNSB* Lens motor Figure 3-203 3–29 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 86 Copy Start key Enlargement selected Lens motor (M3) Change solenoid (SL1) Enlarge Reduce Lens Lens home position sensor (PS2) Figure 3-204 3–30 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 87: Scanner Drive System
No. 1 mirror mount Forward Light-blocking plate No. 2 mirror mount Scanner home position detection signal (SCHP) Scanner home position sensor (PS1) Figure 3-205 3–31 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 88 Forward Reverse Scanner Scanning lamp *The scanner is returned to home position at power-on whenever the scanner is not at home position. Figure 3-206 3–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 89: Driving The Scanner Motor
DC controller PCB (Q301) (Q324) A,A*,B,B* J302 SCA* Microprocessor Motor driver circuit SCB* Current value Current value switching switching control circuit Figure 3-207 3–33 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 90: Operations Of The Scanner In Page Separation Mode
If the forward travel distance during II of Figure 3-208 is in excess of about 216 mm, 216 mm is used to represent the leading edge of the second page. 3–34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 91: Image Formation System
Composite power DC controller supply Static eliminator Scanning lamp High-voltage Transfer ON control circuit circuit roller Q301 Microprocessor Microprocessor Figure 3-301 3–35 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 92: Sequence Of Operations (Image Formation System)
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. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 93: Controlling The Scanning Lamp
(LA1) Zero-cross circuit detection Triac- circuit triggering Switching circuit circuit -13 ZXDP DC controller PCB Composite power supply Figure 3-303 3–37 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 94: Controlling The Primary Charging Roller
Filter circuit Rectifier circuit Voltage detection circuit Photosensitive drum PCTRLS Microprocessor Current U402 detection circuit PCURS DC controller PCB Q301 (master) Microprocessor Figure 3-304 3–38 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 96 (Q301) on the DC controller, which determines the pri- mary charging roller bias application voltage based on the result. 3–40 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 97: Controlling The Transfer Roller Bias
INTR SCFW SCRV SCFW SCRV LSTR STBY Main motor (M1) Transfer bias Cleaning bias (+) Reference bias (ATVC) Static eliminator bias Figure 3-305 3–41 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 98 (transfer bias) (ATVC) (cleaning) Microprocessor DC controller PCB Microprocessor (Q301) Figure 3-306 3–42 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 100: Controlling The Static Eliminator Bias
Composite power supply PCB Photosensitive drum Static eliminator bias drive circuit Static Transformer eliminator circuit JLVCTL JCTL Microprocessor J307 DC controller PCB Q301 Microprocessor Figure 3-307 3–44 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 101 2.5 and 4.0 KV. When the JCTL signal turns ON, the drive circuit turns ON to generate the static eliminator bias. 3–45 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 102: Controlling The Developing Bias
BPWM cylinder BIASS Microprocessor J307 AE sensor VR850 Q301 Microprocessor Copy density correction volume Copy Density key DC controller PCB Figure 3-308 3–46 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 103 The machine changes the voltage level of the DC component of the developing bias to suit the following: -100 (dark) (light) Copy density Figure 3-309 3–47 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 104: Copy Density Automatic Control
Center reference 50 mm (approx.) 14 mm 27 mm (approx.) (approx.) Note: A represents the sensor position. Figure 3-311 AE Sensor Reading Area 3–48 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 105 After AE adjustment with Test Chart NA3, using AE mode, density adjustment should show “5”. In non- AE mode, using NA3, density “5” must be appropriate (adjusted with VR850). Table 3-302 3–49 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 106: Developing/Cleaning Assembly
No. 2 stirring blade Toner level detection PCB Torque limiter Main motor/ Main motor driver PCB Motor drive signal DC controller PCB Figure 3-312 3–50 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 107 AC bias which suits the level of toner is Toner level Blade mount Developing assembly sensor frame Toner Blade DC controller Antenna sensor circuit Developing cylinder Comparator circuit TEP* Figure 3-313 3–51 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 108 3rd (0.5 sec) 2nd (1 sec) Toner absent signal (TEP*) AC bias REPLACE CARTRIDGE message (flashed) A43, AE, 3 copies, continuous. Figure 3-314 3–52 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 109: Blank Exposure Control
Blanking shutter solenoid (SL3) Slide shutter (front) Pre-exposure lamp Blanking shutter home position sensor (PS3) Open/close shutter DC controller PCB Figure 3-315 3–53 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 110 Image exposure shutter optical path Slide shutter Pre-exposure optical path Drum cleaning Drum assembly cartridge Pre-exposure Photosensitive reflecting plate drum Figure 3-317 Figure 3-316 3–54 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 111: Primary Charging Roller Cleaning Control
Primary charging roller Primary charging roller Fulcrum Fulcrum cleaning solenoid Cleaning pad Drum unit Drum Figure 3-318 3–55 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 112: Transfer Roller Locking/Releasing Control
• During last rotation (LSTR) after making 50 copies or more. Photosensitive drum Transfer roller Transfer roller locking releasing solenoid Locking Fulcrum Releasing Figure 3-319 3–56 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 113: Pick-Up/Feeding System
(M6). The set-back roller in the duplexing unit is also driven by the special duplexing motor (M7). Other motors are driven by the main motor 3–57 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 116 Vertical path roller 1 paper sensor (PS11) Registration sensor (PS6) Separation sensor (PS7) Delivery sensor (PS8) Scanner home position sensor (PS1) Figure 3-404 3–60 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 117: Making Two-Sided Copies (1Copy)
Outlet solenoid Outlet motor (forward) Figure 3-405 Set-back rollers Outlet roller (reverse) Duplex exit detect Duplex inlet sensor sensor Figure 3-406 3–61 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 118 Duplexing unit inlet paper sensor (PS15) Duplexing unit motor (M5) Duplexing unit outlet clutch (CL4) Duplexing unit outlet sensor (PS14) CW rotation CCW rotation Figure 3-408 3–62 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 120 COPY COPY Duplexing outlet sensor (PS14) Duplexing inlet paper sensor (PS15) Duplexing unit motor (M5) CW rotation CCW rotation Figure 3-411 3–64 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 121 2. The leading edge of the copy paper butts against the set-back roller 1 and forms an arch. Figure 3-413 Set-back rollers Figure 3-414 3–65 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 122 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. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 123 8. Operations 4 through 7 are repeated for as many times as there are copies to make, and the copies are stacked in the duplexing unit. 3–67 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 124 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. Duplex exit detect sensor (PS14) Set-back roller Figure 3-420 3–68 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 125 SCFW SCRV Duplexing unit motor (M5) Duplexing unit outlet clutch (CL4) Registration sensor (PS6) Registration clutch (CL1) CW rotation CCW rotation Figure 3-421 3–69 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 126 3. When the trailing edge of the first copy paper leaves the set-back roller, the set-back roller rotates counterclockwise, thereby returning the second copy paper. Photosensitive drum Slip roller Set-back roller Figure 3-424 3–70 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 127 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 Photosensitive Registration sensor(PS6) sensor drum Slip roller Figure 3-425 3–71 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 128: Pick-Up From The Cassette Feeding Module-A2
Pick-up clutch Casette 4 size detection PS3cu CL2cu Cassett e 4 Cassette M1cu unit motor Cassette drive PCB DC controller PCB Figure 3-426 3–72 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 129 Cassette 3 pick-up clutch (CL1cu) Cassette 3 vertical path sensor (PS1cu) Cassette unit motor (M1cu) Registration clutch (CL1) Registration sensor (PS6) Main motor (M1) Figure 3-427 3–73 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 130: Pick-Up From The Cassette Feeding Unit-K1
To copier PS1cu PS2cu CL1cu PS3cu PS4cu CL2cu PS5cu PS6cu CL3cu M2cu M1cu Cassette driver PCB DC controller PCB Figure 3-428 3–74 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 131 Cassette 5 pick-up clutch module (CL3u) Cassette 5 vertical path sensor (PS5cu) Registration clutch (CL1) Copier Registration sensor (PS6) Scanner home position sensor (PS1) Figure 3-430 3–75 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 132: Paper Deck Pedestal-K1
CL4: Deck lifter drive clutch PS4: Deck lifter upper limit sensor SL1: Deck pick-up roller release solenoid PS6: Deck open sensor Figure 3-431 3–76 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 133 Deck pick-up roller release solenoid CL1: Deck pick-up clutch PS2: Deck vertical path roller paper sensor CL2: Deck vertical path roller drive clutch Figure 3-432 3–77 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 134 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. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 135: Lifter Operation
Pick-up roller down, i.e., the light-blocking plate of the lifter detecting lever rises to leave the deck lifter position sensor (PS3) Figure 3-434 3–79 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 136 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)
Page 137 Table 2-401 Lifter Figure 3-436 Paper detecting lever Paper detecting spacer Paper sensor (PS1) Lifter Figure 3-437 3–81 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 138: Multifeeder
Multifeeder tray Photosensitive drum Separation pad Registration roller Registration roller paper sensor Multifeeder pick-up solenoid Paper guide plate cam Spring clutch Figure 3-438 3–82 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 139 (PS6) remains ON. DC controller PCB Slide guide (rear) Variable resistor (VR1) Slide guide (Front) Multifeeder tray Figure 3-439 3–83 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 140 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)
Page 141: Identifying The Size Of The Cassette
0: Photointerrupter not blocking the light. * Sizes may be stored in memory within dimensions given (in mm; see the Service Handbook for details). 3–85 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 142 Advise the user so that both sizes match. Guide plate (horizontal) Guide plates (vertical) Paper size lever Figure 3-441 3–86 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 143: Fixing/Delivery Assembly
(TH1) Located out of paper area. Aux themistor (TH2) is at same position of main thermistor and is checking correct function of TH1. 3–87 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 144 Target Peak Target Peak Target number temperature number temperature number temperature number temperature > 21 > 34 > 53 > 57 Table 3-403 3–88 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 145 Upper fixing roller SSR ON J319- 1 HTON Lower fixing roller detection Cleaning roller HTRD Power supply J307-2 ACOFF Error detection circuit Relay(K1) Table 3-442 3–89 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 146 Glows orange (COPY START key indicator) 190˚C 180˚C 170˚C 155˚C 115˚C 90˚C 50˚C ; Actual temperature(Paper area) ; TH1/TH2 control temperature(Control area) Figure 3-443 3–90 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 147 OFF and if it finds an error, it will turn OFF the power. At this time, ‘E004’ data will be stored in memory. 3–91 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 149 0.8 sec 0.8 sec Jam check Normal Error Vertical path roller 1 paper sensor (PS16) Main motor (M1) Figure 3-445 Sequence of Operations 3–93 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 150 Cassette 2 pick-up clutch (CL5) 0.8sec 0.8sec Jam check Normal Vertical path roller 2 paper Error sensor (PS12) Main motor (M1) Figure 3-447 Sequence of Operations 3–94 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 151 Cassette 2 pick-up clutch (CL5) 0.8sec 0.8sec Jam check Normal Error Vertical path roller 2 paper sensor (PS12) Main motor (M1) Figure 3-449 Sequence of Operations 3–95 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 152 SRFW Registration clutch (CL5) 0.3 sec 0.3 sec Jam check Normal Error Separation sensor (PS7) Main motor (M1) Figure 3-451 Sequence of Operations 3–96 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 153: Delivery Delay Jam
SRFW Separation sensor (PS7) 1 sec 1 sec Jam check Normal Error Delivery sensor (PS8) Main motor (M1) Figure 3-452 Sequence of Operations 3–97 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 154: Delivery Stationary Jam
Cassette 3 vertical path sensor (PS1cu) Cassette 4 vertical path sensor (PS3cu) Cassette 5 vertical path sensor (PS5cu) Figure 3-454 Sequence of Operations 3–98 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 155 Cassette 3 vertical path sensor (PS1cu) Cassette 4 vertical path sensor (PS3cu) Cassette 5 vertical path sensor (PS5cu) Figure 3-455 Sequence of Operations 3–99 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 156 14. Pick-Up Timing Jam (Paper Deck Pedestal-K1) Copy Start key JAM flashed Pick-up clutch (CL1) Jam check Vertical path roller normal error paper sensor (PS2) Figure 3-457 3–100 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 157: Power Supply
Main motor +30V driver PCB Scanning lamp control circuit Scanning lamp +24V,5V Sorter composite power supply circuit +24V,5V DF/RDF +34V,24V,5V Deck Figure 3-501 3–101 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 158: Power Supply Circuitry
(Q308) in the DC controller circuit. inaccuracy is ±10%. PWSW T101 DC Power +30V supply +24V unit Q308 Power supply unit DC controller Figure 3-502 3–102 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 159: Detecting Errors On The Power Supply Pcb
(U402) is more than a specific value, the microprocessor (U402) communicates error data to the DC controller PCB to indicate ‘E064’. 3–103 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 160: Protection Mechanisms For The Power Supply Circuit
Do not recharge, disas- semble, or dispose of it in fire. Keep the battery out of reach of children and discard any used battery promptly. 3–104 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 161: Service Mode
• A press on the Clear key returns to group selection (‘3’, for example). 2) Press the Start key. • The machine starts the selected service mode. 3–105 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 162 3) Turn OFF/ON the power switch. Duplex paper stack adj Duplex inversion roller Halogen lamp intensity Duplex input loop Duplex output loop Figure 3-602 3–106 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 163: Control Display Mode ('1')
AE scan intensity display Normal if between ‘68’ and ‘72’. Jam interval Jam paper size data Jam document handler copying data Table 3-602 3–107 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 164 A press on ‘5’ indicates the fifth most recent error. A press on ‘6’ indicates the sixth most recent error. A press on ‘7’ indicates the seventh most recent error. 3–108 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 165 Tenth latest jam data. Table 3-606 Service program 121 displays the paper size at jam occurrence (B5, B5R, B4, A3, A4, A4R, A5, A5R, A6R) 3–109 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 166: I/O Mode ('2')
Starting the mode causes part of the copy count indica- Port C digit P0 display tor to turn ON, representing the I/O state of the input port. Table 3-608 3–110 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 167 ON: light-blocking plate present (paper present) Option cassette connection detection 1 See the table below. Option cassette connection detection 2 See the table below. Reserved – Table 3-609 3–111 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 168 LED 1-e LED 1-f No optional feeding unit. Optional deck feeding unit. 1-cassette optional feeding unit. 2-cassette optional feeding unit. 3-cassette optional feeding unit. 3–112 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 169 Halogen lamp check signal OFF: E220 error Heater ON detection (triac short circuit detection) ON: hater ON detected Composite power supply ACK ON: acknowledged Table 3-611 3–113 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 170: Adjustment Mode ('3')
No. 307 or 308, it is recommended that page separation mode be selected before activating service mode. 3–114 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 171 Cassette 5 pick-up arch adjustment A higher setting increases arching. 0 ~ 63 (timing at which the pick-up roller default: turns OFF) unit: 0.27 mm Table 3-612-2 3–115 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 172 0.27 mm Duplexing unit out let adjustment 0 ~ 63 A higher setting increases the arch. default: unit: 0.27 mm Table 3-612-3 3–116 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 173: Operation/Inspection Mode ('4')
Factory only Fixing offset adjustment Factory only Jam history clear Error history clear Scanner AP initialization Back-up RAM clear See p. 3-133. Table 3-613 3–117 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 174: Machine Settings Mode ('5')
Activating the item increases the time of initial rotation. Activate it if the fixing on the first copy is poor because of a low-temperature environment. deactivated activated default: Table 3-614-1 3–118 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 175 Universal cassette paper size settings: 0 to 14 storage (cassette 4) default: Universal cassette paper size settings: 0 to 14 storage (cassette 5) default: Table 3-614-2 3–119 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 176: Counter Mode ('6')
• To obtain the actual count, multiply the indicated value by 100. Item Description Large copy counter Small copy counter Total copy counter Table 3-615 3–120 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 177: Vii.self Diagnosis
• Deck lifter clutch (CL4dk; faulty) (PS3dk) within 40 sec after the deck lifter • Lifter sensor (PS3dk; faulty) clutch (CL4dk) has turned ON. 3–121 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 178 The relay (KI) does not turn off when the power E802 • Composite power supply (faulty) switch is turned off (ACOFF=0). • DC controller (faulty) 3–122 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 179 ON the power switch once again. If ‘E000’, ‘E001’, ‘E002’, “E003', or ‘E004’ is indicated, remove the cause of the error and perform the following: 3–123 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 180: Self Diagnosis On The Cassette Feeding Unit
• The motor clock signal is not detected E901 ler (faulty) within 1 sec after the pedestal motor • Cassette feeding unit motor drive signal has been generated. (faulty) 3–124 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 181: Rdf/Adf Self Diagnosis
ON the copier’s power switch. 2. You may make copies even while the RF remains out of order by placing originals on the copy paper. 3–125 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 182: Sorter Self Diagnosis
• The lead cam position sensor does not E541 • Lead cam drive gear (dis- turn ON within 10 sec after the lead cam placement) position sensor has turned OFF. 3–126 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 183: Standards And Adjustments
If you changed any of the settings indicated in the Service Mode label, be sure to record the new settings on the label. 3–127 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 184 4) Change the setting using the numeric keypad, • The machine indicates ‘208’. and press the AE key. • To increase the setting, press the AE key. 3–128 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 185 5) Record any new settings in the Service Mode label. 6) Press the Reset key. • The machine ends service mode. 3–129 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 186 Note: 1. After Adjustment, with test chart NA-3, using AE mode, density adjustment should show ‘5’. 2. In non-AE mode, using NA-3, density ‘5’ must be appropriate (adjusted with VR850). 3–130 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 187 For this reason, it is best to • The machine ends service mode. store the sizes of the papers the user tends to use frequently. 3–131 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 188 No. 509 LETTER Cassette 3 No. 510 190.0 268.0 Korean Government Cassette 4 No. 511 Table 3-804 Cassette 5 No. 512 Table 3-803 3–132 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 189: Checking The Photointerrupters
To stop it after performing step 8), press the start key, and press the Start key after the display has indicated ‘nop’. Figure 3-801 3–133 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 191 A. DC Controller PCB ......4-50 D. Feeding Assembly ......4-22 B. Composite Power Supply PCB ..4-50 E. Delivery Assembly ......4-22 C. AE Sensor PCB ......... 4-51 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 193: Externals
Rear right cover Size index Right door Copyboard glass Figure 4-101 Left cover Lower rear cover Lower left cover Upper rear cover Figure 4-102 4–1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 194: Control Panel
8) Remove the screw , and disconnect the four connectors (J801, J802, J803, J804); then, remove the control panel Figure 4-107 Figure 4-105 4–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 195: Removing The Exhaust Fan
3) Remove the rear cover. Figure 4-109 4) Remove the four screws , and remove the scanner cooling fan Figure 4-110 Figure 4-113 4–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 196: Counter
Large size copy counter SW303 settings determines how the option counter (CNT2) Duplexing unit counter behaves. Small size copy counter No counter Table 4-101 4–4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 197: Drive System
3) Where the motor stops, tighten the screws (on the right and then left). 4) Fit the tensioner , and mount the spring and the E-ring 4–5 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 198 (front) Position A Figure 4-209 (rear) Figure 4-207 9) Remove the pulley clip, and remove the scan- ner cable (both front and rear). 4–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 199: Routing The Scanner Cable
8) As in , adjust the cable spring using a ruler so that its length is 34 ±1 mm. 4–7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 201 (front) (front) Figure 4-216 Figure 4-214 4) Using a blower brush or lint-free paper moist- ened with alcohol, clean the No. 6 mirror. 4–9 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 202: Lens Drive Assembly
(front) Figure 4-217 5) Loosen the tension on the spring , and re- move the cable Figure 4-220 Figure 4-218 4–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 203 ; then, remove the lens motor Caution: When removing the screw , disconnect the connector first to avoid contact between the harness and the driver. Figure 4-221 4–11 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 204: Routing The Lens Cable
1) Stop the lens cable at each pulley , and wind it around the pulley 2) Move the tension pulley , and attach the cable. 4–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 206: Main Motor
Route the drive belt over the pulley and the tensioner as indicated. Drive belt Pulley 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. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 207: Pick-Up/Feeding System
3) Pull out the cassettes. 4) Remove the E-ring and the bushing ; then, remove the pick-up roller unit Figure 4-304 Figure 4-302 4–15 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 208: Removing The Separation Pad
+ in Figure 4-308 Figure 4-307 Figure 4-305 0±1.5mm 4) Remove the two screws , and remove the separation pad unit Figure 4-308 Figure 4-306 4–16 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 209: Multifeeder Assembly
Caution: Take care not to lose the pin from the rear. Figure 4-312 Figure 4-310 4–17 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 210 Caution: Take care so that the spring on the separation pad assembly will not fly off. Figure 4-314 Figure 4-316 4–18 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 211 8) Loosen the hex nut , and remove the spring clutch Claw Solenoid plate Gear Paper guide plate cam Figure 4-319 Figure 4-318 4–19 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 212: Registration Roller Assembly
Multifeeder Assembly Rack Plate Figure 4-323 Install the multifeeder rack plate to the pulley with both left and right rack plates fully open. 4–20 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 213 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 by lifting Figure 4-326 Figure 4-325 4–21 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 214: Feeding Assembly
1) Remove the feeding belt. (See “Removing the Feeding Belt.”) 2) Remove the three mounting screws , and remove the feeding fan Figure 4-328 4–22 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 215: Duplexing Assembly
2) Remove the three mounting screws , and disconnect the connector ; then, remove the paper size detection unit 1 Figure 4-333 Figure 4-331 4–23 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 216: Cassette Unit
1) Remove the cassette. 2) Remove the stop ring (plastic) found at the front of the pick-up roller unit. Figure 4-337 Figure 4-335 4–24 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 217 ; then, remove the motor 2) Remove the screw Figure 4-339 Figure 4-342 3) Remove the screw , and remove the harness guide Figure 4-340 4–25 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 218 2) Remove the pick-up motor. 3) Remove the three screws , and remove the 3) Disconnect the two relay connectors driver PCB Figure 4-344 Figure 4-346 4–26 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 219: Paper Deck Pedestal-K1
1) Remove the front right cover and the front left cover. 2) Remove the mounting screw , and remove the stopper plate from both left and right. Figure 4-348 Figure 4-350 (right) 4–27 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 220 Figure 4-353b (right) 5) Remove the mounting screw from the front right, and remove the gear cover Figure 4-352 Figure 4-354 4–28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 222 4) Remove the eight mounting screws , and Figure 4-362 remove the two support plates 5) Disconnect the four connectors Figure 4-360 4–30 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 223: Points To Note
, and remove the feeding roller and the roller shaft Figure 4-363 3) Remove the pick-up roller arm and the weight from the pick-up roller shaft. Figure 4-366 Figure 4-364 4–31 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 224: Removing The Separation Roller
; then, remove the separa- tion roller together with the pressure arm. Rear Front of copier Figure 4-368 Figure 4-370 4–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 225 Install the solenoid so that the pick-up roller arm butts against the upper stay when the plunger of the solenoid is pushed in. Butted. Butted. Figure 4-372 4–33 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 226: Exposure System
Figure 4-404 Figure 4-402 Caution: Do not touch the halogen lamp. (If necessary, wrap lint-free paper around it.) 4–34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 227 Figure 4-406 the solenoid moves smoothly. 4) Remove the three screws , and remove the blank exposure lamp Figure 4-409a Figure 4-407 Figure 4-409b 4–35 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 228: Routing The Blank Shutter Cable
CCW turn: moves the margin to the rear clamp. full turn: moves about 1 mm Figure 4-411 Figure 4-413 6) Install the copyboard glass. 4–36 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 229 6) Install the original size sensor mount, lens hood, and copyboard glass. Figure 4-414 3) Install the lens heater with a screw 4) Connect the connector Figure 4-415 4–37 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 230: Charging System
Do not use drum cleaning powder. 4) Turn the knob counterclockwise, and re- move it. 5) Pull out the drum unit slowly to the front. Figure 4-502 4–38 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 231: Primary Charging Assembly
• Dry-wipe only. Do not use water, alcohol, solvent, or any alcohol- or solvent-related agents. • When dry-wiping, move in one direction only. Figure 4-504 Figure 4-506 4–39 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 232: Transfer Charging Assembly
Caution: Do not touch the surface of the roller. Do not soil the surface of the roller. 4–40 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 233: Drum Heater
Figure 4-512 Figure 4-510 Caution: As necessary, keep the heater harness in place on the cord guide using tie-wraps. 4–41 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 234: Developing System
[New type] If the developing blade unit for the developing a ssembly aith the old type is removed, the old type can't be reattached. 4–42 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 235: Removing The Developing Cylinder
4) Remove the three screws , and remove the 7) Remove the developing cylinder terminal , roll case , and roll Figure 4-608 Figure 4-605 4–43 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 236 Figure 4-612 In other model, engage both ends of the blade assembly with the developing aseembly, and tighten the two screws Figure 4-613 4–44 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 237: Fixing System
Oil application roller Upper roller Figure 4-702 Lower roller 4) Disconnect the three connectors , and re- move the screw Figure 4-701 Figure 4-703 4–45 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 238: Removing The Fixing Roller
4) Pull toward rear the fixing roller. 5) Remove the two screws , and pull out the cleaning roller to the front. Figure 4-707 Figure 4-705 4–46 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 239 No. 304. (See the Service Handbook.) Caution: Do not touch the surface of the heater. Figure 4-710 4–47 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 240 Figure 4-717 Caution: 6) Remove the fixing cleaning roller by lifting it. Take care so that the spring will not fly away. 4–48 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 241 7) Press the Start key. • The machine picks up paper from the cassette, allows measurement as in Figure 4-718, and discharges paper. 4–49 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 242: Viii.electrical
Figure 4-801 4) Disconnect the two AC connectors , and remove the two screws Figure 4-802 4–50 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 243: Ae Sensor Pcb
Figure 4-803 C. AE Sensor PCB 1. Points to Note When Replacing the AE Sensor • After replacement, perform the following: adjust AE 4–51 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 245 VIII.INSTALLING THE REMOTE CARD IV N ..........5-14 DIAGNOSTIC DEVICE II ......5-28 A. Unpacking .......... 5-28 B. Installing to the Copier ....... 5-28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 247: Selecting The Site
A and B around the copier when measured with its front door open. A: 19.7in./50cm B: 3.9in./10cm Figure 5-101 5–1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 248: Unpacking And Installing The Copier
• Keep the fixing stored for Screw possible relocation of the machine. 5–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 249 1 pc. each) of the fixing roller until a click is heard. Remove the two pieces of card- board (spacer) from the feeding Spacer assembly. Spacer 5–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 250 Install the developing assembly, and attach the developing assem- bly stopper with a screw. Engage the developing assembly. Close the copier’s top unit. 5–4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 251: Turning On The Copier
Then, press the Start key to store the setting. To enter the setting for IP_OFST, select ‘No. 314’ in service mode and work in the same way. 5–5 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 252 Start key to make sure that all respective operations are normal. Attach the copy tray. Remove the door switch activator, and close the front door. 5–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 253: Checking The Images And Operations
Clean the area around the copier. Move the machine to its site of Make sure that the copier is more or less level. installation. 5–7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 254: Attaching The Drum Unit
Be sure to insert the drum unit straight along the copier’s rail. Fill out the label, and attach it to the drum unit cover. 5–8 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 255: Changing The Cassette Size
5) Take out the paper size plates for the cassette, and pick out the four plates representing the most frequently used sizes; attach the labels. Figure 5-202 Figure 5-204 5–9 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 257: Relocating The Copier
Tape the front door and delivery assembly in place. Place 11 17/A3 copy paper on the copyboard glass, and tape the copyboard cover in place. 5–11 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 258: Replacing The Drum Unit
Fill out the label, and attach it to the drum unit cover. Lock the developing assembly. 5–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 259 Remove the door switch actuator, and close the front door. Place the test sheet and check Follow image adjustment procedure. copy. (See the Service Handbook P.1-5.) 5–13 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 260: Installing The Control Card Iv N
, detach it 10) Disconnect the copier’s dummy connector in the direction of the arrow using pliers or screwdriver. Figure 5-503 Figure 5-501 5–14 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 261 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. 5–15 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 262: Cassette Heater Kit 5 Installation
Binding screw (black; M4 6) . 2 Mounting plate 2 ....1 TP screw (white; M3 6) ..2 Relay harness ....... 1 5–16 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 263: Installation (To Copying Machine)
4) Remove the screw, and remove the connector cover of the cassette heater. Support member Connector cover Connector Screw Figure 5-605 Figure 5-603 5–17 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 264 7) Fix the mounting plate 1 in place to the copier’s 11) Open the copier’s top unit. side plate with two screws (white; M3 6). Screws Figure 5-607 5–18 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 266: Installation (To A Cassette Feeding Module-A2/B2/Cassette Feeding Unit-K1)
4) Insert the bend found at the rear of the heater into the heater mounting slit in the rear side plate of the cassette feeding unit/ pedestal (bottom holder). Screws Figure 5-612 5–20 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 267 8) Install the cord clamp to the hole in the rear side plate of the cassette feeding unit/pedestal. • Cassette Feeding Module-A2/Cassette Feed- ing Unit-K1 Figure 5-616 Cord clamp Figure 5-614 5–21 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 268 Make sure that the relay harness is outside the are indicated by dashed lines to prevent it from interfering with the feet of the cassette. Relay harness Figure 5-618 5–22 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 269 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. 5–23 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 270: Cassette Heater Kit 7 Installation Procedure
Power cord mount ....1 TP screw (black; M4 6) ..1 Stay ........1 Cord clamp ......1 Relay harness ....... 1 Ratings label ......1 5–24 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 271: Installation
(4 screws); then, remove the two screws, and remove the face plate. Rear cover Figure 5-705 Front upper cover Face plate Left cover Front left cover Figure 5-703 5–25 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 272: Installation
11) Install the copier’s front lower cover and front right cover. 12) Slide in the copier’s bottom cassette. Screw Relay harness Heater Figure 5-707 5–26 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 273: Attaching The Ratings Label
6 mm Figure 5-709 2) Connect the heater’s power plug to the power outlet. 3) Turn on the heater’s power switch. 5–27 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 274: Viii.installing The Remote Diagnostic
Harness band ........2 pcs. Switch setting label ........ 1 pcs. Grounding wire* ........1 pc. Ferrite core ..........1 pc. *Not used. Fig. 5-803 5–28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 275 5) Fix the RDD in place on the copier’s rear cover with four screws ; use the screws removed from the copier. Modular Jack on the Right Fig. 5-805 Fig. 5-807 5–29 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 276 RDD’s LED5 LED6 PCB as indicated in the table. LED4 Fig. 5-809 LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 5-811 5–30 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 277 (green) on the RDD’s PCB comes on. LED1 LED2 LED3 BAT1 LED5 LED6 LED4 LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 5-813 Fig. 5-812 5–31 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 278 13) Shift bit 6 of the DIP switch 2 on the RDD’s PCB to OFF. Fig. 5-817 LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 5-815 5–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 279 LED 2 (orange) flashes. the RDD and is not trapped by the top cover LED1 LED2 LED3 BAT1 LED5 LED6 LED4 Fig. 5-819 5–33 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 281: I. Periodically Replaced Parts
IV. SERVICING CHART ......... 6-5 A. Copier ..........6-2 A. Scheduled Maintenance Work .... 6-5 B. Cassette Feeding Module-B2, Cassette Feeding Module-A2, and Cassette Feeding Unit-K1 .... 6-3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 283: Periodically Replaced Parts
Parts No. Q’ty Life Static eliminator FG5-2912-020 100,000 Note: The above values are estimates only and subject to change based on future data. 6–1 COPYRIGHT © 1996 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 284: Durables And Consumables
FG5-7012-00P 100,000 Scanner cooling fan filter FC2-8902-00P 100,000 Note: The above values are estimates only and subject to change based on future data. 6–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 285: Cassette Feeding Module-B2, Cassette Feeding Module-A2, And Cassette Feeding Unit-K1
Feeding roller 100,000 FB1-7061-000 Separation roller 100,000 FB1-7060-020 Note: The above values are estimates only and subject to change based on future data. 6–3 COPYRIGHT © 1996 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 286: Basic Servicing
Put sample copies in order and clean up the site of installation. Record the latest counter reading. Fill out the Servicing Sheet, and report to the person in charge. 6–4 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 287: Servicing Chart
Fixing inlet guide Delivery guide/ tray Delivery Use alcohol. Fixing feeding spacer assembly Delivery roll Set-back roller Duplexing Use alcohol. unit Re-pick-up roller 6–5 COPYRIGHT © 1996 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 289 R. SPECIAL TOOLS ........A-47 J. CASSETTE FEEDING MODULE-B2 S. SOLVENTS/OILS ........A-48 GENERAL CIRCUIT DIAGRAM ..... A-34 K. CASSETTE FEEDING MODULE-B2 DRIVER CIRCUIT DIAGRAM ....A-35 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 291: General Timing Chart
Registration sensor (PS6) Separation sensor (PS7) Delivery sensor (PS8) Cassette 1 pick-up clutch (CL2) Vertical path roller clutch Registration clutch (CL1) 25 0;Lqpplying solenoid (SL6) A–1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 292: Signals And Abbreviations
CASSETTE4 PAPER DETECTION signal PEXD PRE-EXPOSURE LAMP LIT command CSZ1 CASSETTE SIZE signal 1 PUCLD1 CASSETTE1 PICK-UP CLUTCH DRIVE command CSZ2 CASSETTE SIZE signal 2 A–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 293 VERTICAL PATH2 PAPER DETECTION signal 3. Abbreviations AE ROTATION INTR INITIAL ROTATION LSTR LAST ROTATION SCFW SCANNER FORWARD SCRV SCANNER REVERSE STBY STANDBY A–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 297: Dc Controller Circuit Diagram
R314 R315 C307 DTA114EU R317 CP-SCLK Q302 DTC114EU R318 Q304 CLCK ADD[1..15] R347 ADD[0..14] ADD[1..18] C309 ADD[0..7] DATA[8..15] INDUCTOR C308 DATA[8..15] DATA[0..15] DATA[8..15] A–7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 298 1/04 DATA12 ADD6 1/03 DATA11 C315 BAT301 ADD5 1/02 DATA10 ADD4 1/01 DATA9 ADD3 1/00 DATA8 ADD2 ADD1 Q300 ADD0 CSRAMOU RAMWR DATA[8..15] A–8 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 299 C379 C320 R370 X302 Q312E S-TXD Q314 R372 C321 C322 R371 R373 R374 R375 D-RXD C319 R376 Q312D D-TXD Q315 R377 R378 C323 A–9 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 300 ADD13 ADD12 ADD12 C330 INDUCTOR OPTPHA OPTPHB C325 OPTENB R384 ADD[11..15] ADD[11..15] CSRAMOU DATA[8..15] DATA[8..15] RAMWR INDUCTOR C326 R382 CSGA R380 CSRAM CLCK A–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 301 LENS-A R427 R398 TP13 Q319 R428 PT56 Q400 GND34 LENS-B GND34 R399 TP14 Q320 +24VF2 GND34 C390 C389 LENS-B R400 TP15 Q321 GND34 A–11 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 302 TCNTD R413 Q341 Q338G Q342 TCNTRPR Q343 R414 OPTPHB ZD301 Q401D Q338E Q401E PAPFAN FL-S Q401F R418 Q339 Q401G APGND R419 Q340 C397 A–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 303 PT11 PUCL Q363 R423 Q349C EEP-SCLK Q349E PT15 UPFED-CL Q364 R424 Q349D EEP-SO DPT-FAN Q349B R381 Q402 Q349F Q349G SOL-OIL R403 PT40 Q330 A–13 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 304 PT11 PUCL Q363 R423 Q349C EEP-SCLK Q349E PT15 UPFED-CL Q364 R424 Q349D EEP-SO DPT-FAN Q349B R381 Q402 Q349F Q349G SOL-OIL R403 PT40 Q330 A–14 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 305 R525 M[0..12] M[0..12] R517 DIPD-I DIPD R518 DEPD-I DEPD R519 DERS-I DERS R521 UP-FEDDT-I UP-FEDDT R523 LW-FEDDT-I LW-FEDDT C356 C358 C360 C361 C362 A–15 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 306 Q372 Q382C Q382 PT65 SEG10 Q382B C335 PT64 SEG11 Q382A PT63 SEG12 TD62380P Q382F PT62 SEG13 Q382G PT61 SEG14 Q382H PT60 SEG15 TD62380P A–16 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 307 D345 CCDT CPDU D363 MMLOCK D320 FACTORY R467 R468 D346 LWCSZ-1 D347 LWCSZ-2 D348 LWCSZ-3 D349 LWCSZ-4 D350 D319 D351 APS-L4 JPPGP M[6..12] A–17 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 308 C349 C379 R560 – Q387B R564 R405 R562 AE-DATA0 Q328A SW303 – – AE-DATA HTNG OPCNTCN2 OPCNTCN1 R565 SW DIP-2 R563 A-TH C380 A–18 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 309 UPFED-CL MMLOCK SEG5 LW-FEDDT 24V2 SEG6 R581 SEG7 SEG8 SEG9 CPDU SEG10 SEG11 SEG15 R583 SRG12 SEG14 RDROPN SRG13 PAP-EX J306 SRSW CCDT A–19 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 310 BLNKST-SL 24V2 J321 24V2 PR-EXP 24VF2 EXFAN 24V2 24VF2 J316 TRCLSL +24V2 R585 J322 MFPWD 24VF2 24VF2 MFPD R584 RGPD J317 S-TXD S-RXD A–20 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 311: Composite Power Supply Circuit Diagram
C136 C141 C135 BLACK R224 VREF-U1 OSC-U1 VAUX VCC-PRIN COLD-LINE HOT-LINE R220 R21 R20 -BATT R222 ZD11 R221 HEAT-PROT OVERC C140 R223 -BATT A–21 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 312 R27 24V +30VSEC VFEEDBK -BATT C139 +24VSEC + 5FBT R208 MRES R209 OVERC -BATT N.C. + 5FBT R210 VREF-UI OSC-UI R211 FAN-ON CP-DATAO A–22 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 313 MRES AC-BCAS H.V.GENERATOR MV-L ACBIAS-ON + 5FBT HV-L HV-H HV-L HV-H + 5FBT PRIMARY + 5FBT BIAS-S PDC-S HV-H HV-L P-CUR-S PDC-S P-CTRL-S A–23 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 314 CP-SIN + 5FBT CP-ACK CP-BATAO R201 R202 HEADER 17 FOR BRUSHLESS MOTOR CP-REO FL-LIGHT-ON MRES FL-LIGHT-ON * + 5FBT R203 FAN-ON FAN-EN FAN-EN A–24 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 315 T - FW - S C101 C100 U12B R152 C102 U10A U12A C103 C104 R153 T-CTRL-S R154 T - FEEDBACK C105 R155 C106 R156 A–25 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 316 BTA12-600C 24VAUX R178 R181 R177 R179 R217 C136 R218 C113 R182 C137 + C110 C111 1/2V NO FLAME R184 R204 FL-S R183 C112 A–26 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 317: Control Panel Keypcb
SEG5 R807 SEG6 R808 SEG7 R809 SEG8 R810 J803 SEG9 R811 SEG10 R812 SEG11 R813 SEG12 R814 SEG13 R815 SEG14 DG0B DG1B DG2B A–27 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 319 R845 COMB-NUM ZOOM + ZOOM - CASS-SELEC Q814 DG6C DG6B D806 SW813 SW818 SW821 SW822 R830 R846 R831 R847 Q815 Q807 DG7C DG7B A–29 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 321: Ae Sensor Circuit Diagram
G. AE SENSOR CIRCUIT DIAGRAM +24V J601 R601 R603 +24V R602 R605 PD601 J601 AEDATA C601 Q601 +24V R604 J601 AEREF Q601 C602 J601 A–31 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 322: Intensity Sensor Circuit Diagram
R403 D404 D403 WHITE J403 Q402 R404 HTTRIG L401 140uH 7A Q403 AC INPUT CABLE C402 FROM POWER SUPPLY R406 R405 C401 BLACK A–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 323: Toner Level Detection Circuit Diagram
+24V +24V Q762 Q752 Q761 Q751 R764 R754 D762 D763 D752 D753 R771 VR762 R762 R751 R752 D761 D751 +24V C750 C751 J753 A–33 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 324: Cassette Feeding Module-B2 General Circuit Diagram
PCB1 Detector1 OPCST Driver-1 PAPER1 J110F SIZE1-1 SIZE2-1 J218F SIZE3-1 SIZE4-1 Paper Size PCB2 Detector1 J115F J114F J115FP J115P Feed Feed Clutch1 Motor A–34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 325: Cassette Feeding Module-B2 Driver Circuit Diagram
Detector 1 SIZE4-1 D114 J110 J110 +24V Paper Feed J115 CLUTCH1 Clutch 1 J115 MTR-B MTR-A to A503 MTR-COM C104 C103 C102 +34V C101 A–35 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 326 C112 C109 C111 R101 C106 C108 R132 R106 R108 R109 R110 Q101 R107 R131 C107 R103 R104 Q103 Q104 R105 C105 from A502 A–36 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 327: Cassette Feeding Module-A2 General Circuit Diagram
Feed DROPN J216F Detector1 J229F J116F FEED1 Right Door Open Detector J125F J114F J215FP J225FP F215P J225P Feed Feed Feed Clutch1 Clutch2 Motor A–37 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 328: Cassette Feeding Module-A2 Driver Circuit Diagram
J125 Clutch 2 +24V Paper Feed J125 CLUTCH2 J125 Clutch 1 MTR-B MTR-A to A503 C104 MTR-COM C103 R100 C102 +34V D120 C101 A–38 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 329 C112 C109 C111 R101 C106 C108 R132 R106 R108 R109 R110 Q101 R107 R131 C107 R103 R104 Q103 Q104 R105 C105 from A502 A–39 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 331: Cassette Feeding Unit-K1 General Circuit Diagram
J229F J227F J226F J228F PCB3 Cassette night Cassette 4 size Cassette 4 paper Cassette 4 vertical path door senson detection PCB detection detection A–41 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 332: Cassette Feeding Unit-K1
J103 SIZE3 J103 SIZE2 J103 SIZE1 CLUTCH2/3 J103 C4/5PD PAPER2/3 J103 C4/5PUCLD KS5/6 J103 MTRCOM Q103 Q104 Q107 Q117 R103 R104 to A504 A–42 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 333 A502 C110 Q110 R135 PAPER3 Q135 to A502 Q110 KS5/6 Q126 Q110 Q136 Q110 N.C. Q110 MTR-COM3 to A504 MTR-COM Q137 R105 A–43 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 334 C309 C310 J134 C307 OUTA J134 R305 OUTB R331 R332 COM B VrefB J134 C305 C311 C312 C308 OUTB J134 J134 N.C. J134 A–44 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 335: Paper Deck Pedestal-K1 General Circuit Diagram
J114F CL9D J101F +34V J86R +24V J86F J86P DEPRL FGND Deck lifter drive clutch J87R J87P J87F SL11 Deck pick-up roller release solenoid A–45 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 336: Paper Deck Pedestal-K1 Driver Circuit Diagram
J103 Q120 D114 R104 Q121 Q120 Q111 J101 Q112 R105 C105 +34V Q109 J101 R111 R103 D113 Q114 R109 C103 C104 Q113 Q115 A–46 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 337: Special Tools
(comes in 1 and No. 2 mirrors. pairs; front, rear) For fixing the scanning Pulley clip FY9-3010-000 cable in place. (front, rear) A–47 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 338: Solvents/Oils
MOBIL Vactraoil No. 4 assembly Silicone oil Lubricating Lubrication point: Tool No.: CK-0551 (20g) grease friction parts Conductive Silicone oil Tool No.: CK-0438 (100g) grease A–48 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Page 339 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)
Page 340 This publication is printed on 70% reprocessed paper. PRINTED IN JAPAN (IMPRIME AU JAPON) 0398S1.11-1...

Canon NP6621 Service Manual

Table of Contents

Chapter 2 Copying Process

Chapter 3 Operations and Timing

Chapter 4 Mechanical System

Chapter 5 Installation

Chapter 6 Maintenance and Servicing

Appendix

Quick Links

Chapters

Related Manuals for Canon NP6621

Summary of Contents for Canon NP6621