Page 2 - COPYRIGHT © 1998 CANON INC.; Prepared by; IMPORTANT
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) COPYRIGHT © 1998 CANON INC. Printed in Japan Imprimé au Japon Use of this manual should be strictly supervised to avoid disclosure of confidential information. Prepared by OFFICE IMAGING PRODUCTS TECHNICAL S...
Page 3 - Introduction
Introduction i COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 con...
Page 4 - i i
i i Introduction COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) RDF-F1 (Recirculating Document Feeder)Automatically feeds a set of up to 100 originals to theplaten glass for copying. The RDF can also turn overtwo-sided originals for automatic two-sided c...
Page 5 - iii; CONTENTS; F. Inputs to and Outputs from the Cassette
iii COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CONTENTS CHAPTER 1 GENERAL DESCRIPTION I. FEATURES ................................................ 1-1 II. SPECIFICATIONS ..................................... 1-2 A. Copier ...............................
Page 6 - iv; D. Protection Mechanisms for the Power; CHAPTER 5; II. UNPACKING AND INSTALLING THE; CHAPTER 4
iv COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Duplexing Unit ................................... 3-63D. Pick-Up from the Cassette Feeding Module-A2 ......................................... 3-72 E. Pick-Up from the Cassette Feeding Unit-K1 ..........
Page 7 - CHAPTER 6
v COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 6 MAINTENANCE AND SERVICING C. Paper Deck Pedestal-K1 ..................... 6-3 III. BASIC SERVICING ................................... 6-4IV. SERVICING CHART ................................. 6-5...
Page 9 - CHAPTER 1
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION I. FEATURES ................................................ 1-1 II. SPECIFICATIONS ..................................... 1-2 A. Copier ............................................
Page 11 - Multiple front loading and multifeeder for space saving.; compared to other Canon copiers)
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–1 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 fr...
Page 13 - Copy paper type
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–3 Specifications Sheet, book, 3-D object (2 kg/2.204 lb. max.) A3 (297 x 420 mm) DIRECT, 2R2E (Table 1-1);zoom between 49% and 204% (fine zooming provided) 30 sec 9.7 sec (approx.; A4, ...
Page 14 - Table 1-201 Defaults Reproduction Ratio
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–4 Item Temperature Operating environment Humidity Atmospheric pressure Power supply 230 V (50Hz) Standby Power consumption Continuous copying Copying Noise Standby Ozone (avr over 8 hr)...
Page 15 - Cassette Feeding Unit-K1
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–5 Reproduction ratio DIRECT 1: 1 (±0.5%) 1: 0.500 (+1.0%) REDUCE 1: 0.707 (+1.0%) 1: 2.000 (+1.0%) ENLARGE 1: 1.414 (+1.0%) Copy size A3 (297 × 420) A4 (210 × 297) A5 (148 × 210) B4 (25...
Page 18 - Cross Section of the Body
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–8 B. Cross Section 1. Cross Section of the Body q No. 3 mirror w No. 2 mirror e No. 1 mirror r Scanning lamp t Fixing unit y Feeding assembly u Copyboard glass i Drum unit o Lens !0 Pri...
Page 26 - a. Placing originals on the platen glass
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–16 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 ...
Page 27 - C. Using the Stack Bypass; You can place up to 50 sheets of copy paper (a
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–17 C. Using the Stack Bypass You can place up to 50 sheets of copy paper (a stack approximately 5 mm high) in the stack bypassto be automatically fed into the copier. Use the stackbypas...
Page 28 - ) Adjust the slide guides to fit the size; size of the copy stock.; ) Align the required number of sheets; If the Stack Bypass Size Entry in Custom; key until the stack
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–18 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 s...
Page 29 - The Use of Keys and Displays That
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–19 7) Press the key. If you set the Two-sided, Two-page separation, Overlay, Image Separation or TransparencyInterleaving modes in step 1 for stack bypassfeeding, and you have not selec...
Page 30 - Auto Energy Saver Time
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–20 Settings –0 –1 –2 –3 –4 –5 –6 –7 –8 –9 Auto Clear Time (min.) 0 1 2 3 4 5 6 7 8 9 3. Auto Clear Time If the copier is not operated (no keys are pressed) for a certain period of time,...
Page 31 - Zoom Fine Adjustment
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–21 a. Zoom Fine Adjustment (Reduction): Press the key. b. Zoom Fine Adjustment (Enlargement): Press the key. 5. Zoom Fine Adjustment • If there is a slight difference in size between th...
Page 35 - Initializing User Mode
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–25 11. Initializing User Mode • The settings that were changed in the Additional Functions mode can be restored to their initialsettings. 1) Press the AditionalFunction key. • “U01” app...
Page 36 - ACTIONS; Flashes on the Control Panel
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–26 V. WARNINGS AND ACTIONS A. Jam Indicator 1. When q Flashes on the Control Panel 1) Open the front door. Figure 1-501 2) Lift the green lever on the left side to open the top of the m...
Page 40 - Lights (Checking the Right
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–30 7) After inspecting all jam location areas that appeared on the control panel, and removingany jammed paper, close the front door.If a paper jam occurred while using the ADF/RDF (opt...
Page 41 - Flashes (Replacing the Toner; • If the toner has run low, the Replace Toner
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–31 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 replacethe use...
Page 43 - B. Cleaning the Static Charge
GENERAL DESCRIPTION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–33 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 offwhen you open the main ...
Page 45 - CHAPTER 2
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 COPYING PROCESS I. IMAGE FORMATION ................................ 2-1A. Outline ................................................. 2-1B. Latent Static Image Formation Block .. 2-2C. Step 1 (pre-ex...
Page 48 - B. Latent Static Image
2 – 2 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) The copier forms images through the following steps, and each of the steps functions as describedbelow. step 1 pre-exposure step 2 primary charging (negative DC) step 3 image exposure s...
Page 49 - Before primary charging takes place, the light of
2 – 3 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Step 1 (pre-exposure) Figure 2-105 Before primary charging takes place, the light of the pre-exposure lamp is directed to the photosen-sitive drum to eliminate the residual charges o...
Page 50 - In this step, the optical image of an original is; Toner; Blade; Optical image
2 – 4 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) F. Step 4 (development) Figure 2-109 E. Step 3 (image exposure) Figure 2-107 In this step, the optical image of an original is projected on the photosensitive drum to neutralizethe char...
Page 51 - The transfer roller deposits negative charges
2 – 5 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) G. Step 5 (transfer) Figure 2-111 The transfer roller deposits negative charges on the back of copy paper to attract toner from thedrum surface to the copy paper. The copier uses a roll...
Page 52 - The copier uses a curvature separation method,; Static eliminator; Transfer roller
2 – 6 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) H. Step 6 (separation) Figure 2-113 The copier uses a curvature separation method, which separates copy paper from the photosensi-tive drum by the rigidity of the paper. However, thinpa...
Page 53 - In this step, the copy paper is pressed between; Oil application roller
2 – 7 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) J. Step 8 (drum cleaning) I. Step 7 (fixing) Figure 2-114 In this step, the copy paper is pressed between two heated rollers to make the toner imagepermanent. To prevent the copy paper ...
Page 54 - II. AUXILIARY PROCESS; Blank exposure is executed to remove the drum
2 – 8 COPYING PROCESS COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) II. AUXILIARY PROCESS A. Blank Exposure Blank exposure is executed to remove the drum surface potential of the non-image area that occursas a result of the difference among copy sizes o...
Page 55 - CHAPTER 3; represents mechanical drive paths, and
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 ...
Page 57 - A. Functional Construction
3 – 1 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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...
Page 58 - cuitry; The machine’s most electrical mechanisms are
3 – 2 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Outline of Electrical Cir- cuitry The machine’s most electrical mechanisms are controlled by the microprocessor on its DC controllerPCB. The microprocessor reads the input sign...
Page 59 - C. Inputs to the DC Controller
3 – 3 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Inputs to the DC Controller 1. Inputs to the DC Controller PCB (1/5) Figure 3-103 5V PS 1 Registration sensor 5V J 310A- 3 - 2 - 1 PS 2 LHP When the home position sensor detect...
Page 64 - D. Outputs from the DC Controller
3 – 8 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D. Outputs from the DC Controller 1. Outputs from the DC Controller PCB (1/5) Figure 3-108 +5V 24V +5V A B B RL101 RL103 HTON* TEP* EHTRL* Cassette heater (H4) Drum heater (H3) Ca...
Page 69 - E. Inputs to and Outputs from the Cassette Feeding Module-B2
3 – 1 3 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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) Figure 3-113 5V J 110- 1 - ...
Page 70 - F. Inputs to and Outputs from the Cassette Feeding Module-A2
3 – 1 4 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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) Figure 3-114 5V J 110- 1 - ...
Page 72 - G. Inputs to and Outputs from the Cassette Feeding Unit-K1
3 – 1 6 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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) Figure 3-116 5V J 110- 1 - 3 - ...
Page 77 - H. Main Motor Control Circuit
3 – 2 1 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) H. Main Motor Control Circuit 1. Outline Figure 3-121 shows the circuit that controls the main motor (M1), and the circuit has the followingfunctions: q Turns ON/OFF the main mo...
Page 80 - Each original size sensor consists of a LED and; J. Original Size Detection; The machine offers auto paper selection, auto
3 – 2 4 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) when the copyboard cover is closed and identify theoriginal as being any of the default paper sizes. Each original size sensor consists of a LED and a phototransistor: the LED i...
Page 81 - When the copyboard cover is brought down to
3 – 2 5 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Operations 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 blocksPS11. For 15 sec aft...
Page 82 - Original Size Detection; based on the sensor output combinations given in Table 3-102.
3 – 2 6 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 giv...
Page 83 - EXPOSURE SYSTEM; A. Varying the Reproduction
3 – 2 7 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Lens Drive System 1. Outline The lens drive system is driven by the lens motor (M3), and the drive generated by the lens motor istransmitted to the blanking shutter exposure ...
Page 85 - Lens Motor Drive Circuit
3 – 2 9 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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...
Page 86 - Basic Sequence of Operations for; In enlargement/reduction mode, the lens is
3 – 3 0 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 beingm...
Page 87 - C. Scanner Drive System; The scanner drive system is driven by the scanner
3 – 3 1 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Scanner Drive System 1. Outline The scanner drive system is driven by the scanner motor (M2). The scanner motor changes the directionof its rotation, and its speed changes wh...
Page 88 - Relationship between Scanner Sensors and Signals
3 – 3 2 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Signal SCHP Description Registration clutch ON Scanner reverse OFF 0.1 sec later Scanner sensor PS1 Scannerhome positionsensor Scanner Forward Reverse ▲ 2. Relationship between ...
Page 89 - Driving the Scanner Motor; The scanner motor is a 4-phase control step-
3 – 3 3 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4. Driving the Scanner Motor a. Outline The scanner motor is a 4-phase control step- ping motor. It is turned ON/OFF and its directionand the speed of its rotation are chanceged...
Page 90 - D. Operations of the Scanner in Page Separation Mode; The microprocessor determines how much the
3 – 3 4 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D. Operations of the Scanner in Page Separation Mode Figure 3-208 I, II, and II in Figure 3-208 use the scanner home position signal (falling edge of SCHP) for the 1stpage as th...
Page 91 - SYSTEM; The machine’s image formation system con-
3 – 3 5 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) III. IMAGE FORMATION SYSTEM A. Outline The machine’s image formation system con- sists of the following: • Controls the scanning lamp.• Controls the primary charging.• Controls ...
Page 93 - C. Controlling the Scanning; a. Turning the Scanning Lamp ON and OFF
3 – 3 7 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) The machine exerts phase control by the zero- cross signal (ZXDP) to stabilize the light intensity. The intensity of the scanning lamp is switched controlled by the LIGHT INTENS...
Page 94 - D. Controlling the Primary
3 – 3 8 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D. Controlling the Primary Charging Roller 1. Outline Figure 3-304 shows the circuit that controls the application voltage of the primary charging roller,and the circuit has the...
Page 95 - ing Roller Bias
3 – 3 9 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Turning ON/OFF the Primary Charg- ing Roller Bias Under the control of the microprocessor master (Q301) on the DC controller PCB, the micro-pro-cessor on the composite power ...
Page 96 - • Flow
3 – 4 0 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) The sequence of this control mechanism is asfollows during initial rotation after the power switchis turned ON: • Flow A specific voltage (about -1.46 kV) is appliedto the prima...
Page 97 - E. Controlling the Transfer
3 – 4 1 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 biascontrol in a way different...
Page 98 - • Corrects the voltage level of the transfer bias.
3 – 4 2 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 3-306 shows the circuit that controls theforegoing three types of biases, and the circuit hasthe following functions: • Turns ON/OFF the transfer roller bias.• Controls t...
Page 99 - Bias
3 – 4 3 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Turning ON/OFF the Transfer Roller Bias The TFWON signal is generated under the control of the microprocessor on the compositepower supply PCB, thereby turning ON thesecondar...
Page 100 - nator Bias; Figure 3-307 show the circuit that controls the
3 – 4 4 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) F. Controlling the Static Elimi- nator Bias 1. Outline Figure 3-307 show the circuit that controls the static eliminator bias, and the circuit has the followingfunctions: • Turn...
Page 101 - Switching the Voltage Level of the
3 – 4 5 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Switching the Voltage Level of the Static Eliminator Bias The microprocessor on the composite power supply PCB generates the JCTL signal (analogsignal) under the control of t...
Page 102 - G. Controlling the Developing
3 – 4 6 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) G. Controlling the Developing Bias 1. Outline Figure 3-308 shows the circuit that controls the developing bias, and the circuit has the followingfunctions: • Turns ON/OFF the de...
Page 103 - Controlling the Voltage Level of the
3 – 4 7 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Turning ON/OFF the Developing Bias DC Component and Controlling toConstant Voltage The microprocessor on the composite power supply PCB generates the BPWM signal (pulsesignal...
Page 104 - H. Copy Density Automatic; Control Operations; Figure 3-311 AE Sensor Reading Area
3 – 4 8 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) H. Copy Density Automatic Control 1. Outline The machine is equipped with an automatic density correction (AE) function that controls theDC component of the developing bias to s...
Page 106 - The machine’s photosensitive drum, developing
3 – 5 0 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) I. Developing/Cleaning As-sembly 1. Outline The machine’s photosensitive drum, developing cylinder, No. 1 stirring rod, and No. 2 stirring bladeare rotated by the drive of the m...
Page 107 - Toner Level Detection Control
3 – 5 1 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 bi...
Page 109 - J. Blank Exposure Control; The machine directs light from the pre-exposure
3 – 5 3 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) J. Blank Exposure Control 1. Outline The machine directs light from the pre-exposure lamp to the photosensitive drum by way of a reflectingplate for blank exposure, thereby blan...
Page 110 - Margin and Sheet Gap; The microprocessor (Q301) on the DC controller
3 – 5 4 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Blanking the Non-Image Area (re- duction) In reduction mode, the change solenoid (SL1) turns ON, and the lens is moved to suit the selectedreduction ratio. At this time, turn...
Page 111 - K. Primary Charging Roller; The machine’s primary charging roller is; Primary Charging Roller Cleaning
3 – 5 5 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) K. Primary Charging Roller Cleaning Control 1. Outline The machine’s primary charging roller is equipped with an automatic cleaning mechanism. The automatic cleaning mechanism c...
Page 112 - Releasing Control; The machine’s transfer roller is equipped with a
3 – 5 6 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Transfer roller lockingreleasing solenoid Photosensitive drum Transfer roller Fulcrum Locking Releasing L. Transfer Roller Locking/ Releasing Control 1. Outline The machine’s tr...
Page 113 - Copy paper is controlled by the registration
3 – 5 7 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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, theappropriate pick-up ro...
Page 117 - Copying on the 1st Side
3–61 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 ...
Page 118 - Copying on the 2nd Side
3–62 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Copying on the 2nd Side Figure 3-407 2. Sequence of Operations (two-sided; 1 copy, A4) Figure 3-408 (forward) Registration paper sensor (PS6) Registration roller clutch (CL1) Deliv...
Page 119 - The machine uses a set-back method and a; Copy paper
3–63 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Duplexing Unit 1. Outline The machine uses a set-back method and a separation flapper during continuous two-sidedcopying. The term set-back method refers to a method of preventi...
Page 120 - back roller is driven by a special stepping motor.
3–64 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Set-Back Operations The lower feeding inlet roller and the lower feeding outlet roller are driven by the main motor, and the set- back roller is driven by a special stepping mot...
Page 122 - The second copy paper is moved to the duplexing unit.
3–66 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. Figure 3-415 4. The second copy p...
Page 123 - duplexing unit inlet.
3–67 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6. The set-back rollers 1 rotate clockwise, thereby pulling the trailing edge of the second copy paper out the duplexing unit inlet. Figure 3-418 7. The set-back rollers 1 and 2 ro...
Page 125 - After copying on the first side, the copy paper
3–69 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Re-Pick Up Operation After copying on the first side, the copy paper stacked in the duplexing unit is picked up onceagain for copying on the second side. The machine’s duplexing...
Page 126 - roller rotate clockwise.
3–70 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1. After the Copy Start key is pressed for the second side, the set-back roller and the duplexing unit outlet roller rotate clockwise. 2. When the first copy paper reaches the dupl...
Page 127 - clockwise to pick up the second copy paper.
3–71 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. Figure 3-425 Photosensitivedru...
Page 128 - The cassette unit is equipped with a pick-up
3–72 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 rol...
Page 130 - The cassette unit motor 1 (M1cu) is used to drive
3–74 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 bythe pick-...
Page 132 - Basic Construction; The paper deck unit controls the operation of
3–76 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) F. Paper Deck Pedestal-K1 1. Basic Construction The paper deck unit controls the operation of each load according to the signals from the pedestalcontroller PCB to send paper to th...
Page 133 - When the copier’s COPY START key is pressed,
3–77 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 thedeck pick-up roller. The deck pick-up rol...
Page 135 - When the deck is slid inside the pedestal, the
3–79 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Lifter Operation a. Operation When the deck is slid inside the pedestal, the pick-up roller lowers and the light-blocking plateleaves the deck lifter position sensor (PS3). Thec...
Page 137 - Detecting Paper in the Deck; a. Identifying the Size of Paper
3–81 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 thepaper deck. When y...
Page 138 - The multifeeder is a mechanism which picks up
3–82 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) G. Multifeeder 1. Outline The multifeeder is a mechanism which picks up paper from its tray and which is capable of continuouspick-up operation. The copy paper on the tray is detec...
Page 139 - Identifying the Size of Paper on the; The size of paper on the tray is identified by the
3–83 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 associationwith the slide guide...
Page 141 - H. Identifying the Size of the; Cassette size
3–85 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) H. Identifying the Size of the Cassette Specific photointerrupters (Q651, Q652, Q653, Q654) turn OFF or ON when a cassette is slid intoa cassette holder. Specific combinations of t...
Page 142 - To change the size of a cassette, move the
3–86 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) To change the size of a cassette, move the guide plates (horizontal, vertical) inside the cassetteand also move the paper size lever found at the frontof the cassette to the left o...
Page 143 - Fixing/Delivery Assembly; perature
3–87 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) I. Fixing/Delivery Assembly 1. Controlling the Fixing Roller Tem- perature The upper and lower rollers of the fixing assembly and the delivery roller of the delivery unit are drive...
Page 144 - Target temperatures for the following size paper:
3–88 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Target temperatures for the following size paper: A3 – A4 Argentine letter Ledger – Letter Government letter – Executive Government Korea B4 – B5 Oficio Equador Argentine Legal Arg...
Page 145 - Oil Application Roller
3–89 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) The copier is equipped with three protection mechanisms to prevent the fixing heater from goingON at wrong timing. • The microprocessor monitors the voltage of TH1 and indicates ‘E...
Page 146 - perature Control System
3–90 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Operation of Fixing Assembly Tem- perature Control System Figure 3-443 ,,,,, ,, ,, , Main motor(M1);Scanner cooling fan(FM2) Exhaust fan(FM1) Fixing roller heater(H1) Oil applic...
Page 147 - Detecting Overheating of the End of; The rear end of the machine’s fixing heater is; Protection Mechanism; The machine is equipped with the following; c. Heater ON Detection
3–91 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 andprevent overheating of the...
Page 149 - Vertical Path Roller 1 Delay Jam; Figure 3-445 Sequence of Operations
3–93 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 tu...
Page 150 - Vertical Path Roller 2 Delay Jam; Figure 3-446 Sequence of Operations; Vertical Path Roller 2 Timing Jam; Figure 3-447 Sequence of Operations
3–94 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 pick- up clutch (CL5) has turned ON. Fi...
Page 151 - Figure 3-448 Sequence of Operations
3–95 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 rolle...
Page 152 - Separation Delay Jam; Figure 3-450 Sequence of Operations; Separation Timing Jam; Figure 3-451 Sequence of Operations
3–96 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. Figure 3-450 Sequence of Ope...
Page 153 - Delivery Delay Jam; Figure 3-452 Sequence of Operations
3–97 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. Figure 3-452 Sequence of Operations...
Page 154 - Delivery Stationary Jam; has turned ON because of feeding faults.; Figure 3-453 Sequence of Operations
3–98 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. 11. Pi...
Page 155 - Figure 3-455 Sequence of Operations
3–99 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 (CL...
Page 157 - POWER SUPPLY; A. Outline of Power Distribution
3–101 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) V. POWER SUPPLY A. Outline of Power Distribution Figure 3-501 Door switch Power switch Power plug FU2 T1 Main transformer High- voltage power supply unit DC controller Scanning la...
Page 158 - B. Power Supply Circuitry; The machine’s power supply unit uses a single
3–102 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Power Supply Circuitry 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 swit...
Page 159 - C. Detecting Errors on the; The microprocessor (U402) and LED501 on the; Data Error in the High-Voltage Output; If the difference between the actual control
3–103 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Detecting Errors on the Power Supply PCB The microprocessor (U402) and LED501 on the composite power supply PCB checks for errors; ifan error is identified, the microprocessor ...
Page 160 - D. Protection Mechanisms for; The composite power supply PCB is
3–104 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 th...
Page 161 - B. Using Service Mode; Starting Service Mode
3–105 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) VI. SERVICE MODE A. Outline The machine’s service mode is grouped into the following six: B. Using Service Mode 1. Starting Service Mode 1) Open the front door, and insert the doo...
Page 162 - Recording on the Service Label
3–106 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7. Recording on the Service Label Figure 3-601 shows the label attached behind the front door. Each machine is adjusted and set atthe factory, and the appropriate values are re-co...
Page 164 - No. 101 Jam Location Display
3–108 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) No. 101 Jam Location Display The type of jam is indicated using the copy counter. LED (ON) J1 J2 J3 J4 J5 J6 J7 J8 J9 JA Jb JC Type of jam Pre-registration delay jam Pre-registrat...
Page 165 - No. 120 Jam interval indication
3–109 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) No. 120 Jam interval indication By pushing key 1 2 3 4 5 6 7 8 9 0 Table 3-605 Jam interval indication 120 First lates jam interval. Second latest jam interval. Third latest jam i...
Page 170 - number on the numeric keypad.
3–114 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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...
Page 175 - Item
3–119 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) No. 509 510 511 512 Item Universal cassette paper sizestorage (cassette 2) Universal cassette paper sizestorage (cassette 3) Universal cassette paper sizestorage (cassette 4) Univ...
Page 177 - A. Copier Self Diagnosis
3–121 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) VII. SELF DIAGNOSIS The microprocessor on the machine’s DC con- troller is provided with a self diagnosis mechanismwhich checks the condition of the machine (sensorsin particular)...
Page 179 - Initializing Back-Up Error Codes; If the self-diagnosis mechanism has turned ON,
3–123 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Initializing Back-Up Error Codes If the self-diagnosis mechanism has turned ON, you can reset the machine by turning OFF and thenON the power switch, unless the error is repre-sen...
Page 180 - B. Self Diagnosis on the Cassette Feeding Unit
3–124 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Code Cause • Cassette feeding unit control- ler (faulty) • Cassette feeding unit motor (faulty) Description • The motor clock signal is not detected within 1 sec after the pedesta...
Page 182 - D. Sorter Self Diagnosis
3–126 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Code Cause • CPU or communication IC on sorter controller (faulty) • Feeding motor (fails to rotate) • Staple guide bar swing motor (fails to rotate) • Stapler unit swing motor (f...
Page 183 - ADJUSTMENTS; AE Adjustment
3–127 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) VIII. STANDARDS AND ADJUSTMENTS A. Electrical 1 A d j u s t m e n t a f t e r R e p l a c i n gPCBs You must perform the following adjustments whenever you have replaced the follo...
Page 186 - Remarks
3–130 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Remarks The lamp intensity isautomatically adjusted sothat the copies of theTest Chart will be madeat density 5. q A lower setting inservice mode causesthe AE copies to bedarker. ...
Page 189 - Initializing the Back-Up RAM
3–133 OPERATIONS AND TIMING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 mach...
Page 191 - electric continuity be sure to use the washer for reassembly.
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 MECHANICAL SYSTEM I. EXTERNALS ............................................. 4-1A. External Covers ................................... 4-1B. Control Panel ....................................... 4-...
Page 193 - EXTERNALS
4–1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM I. EXTERNALS A. External Covers Note:Remove the covers as necessary to clean,inspect, or repair the inside of the machine.Those covers that may be detached by merelyremoving their mount...
Page 194 - Removing the Control Panel; C. Removing the Display
4–2 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM B. Control Panel 1. Removing the Control Panel 1) Remove the copyboard glass.2) Remove the upper left cover.3) Open the front door.4) Pull the open/close lever, and open the body.5) Rem...
Page 195 - Removing the Exhaust Fan
4–3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 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 . Figure 4-108 4) Remove the screw w from the re...
Page 197 - DRIVE SYSTEM; A. Scanner Drive System; Removing the Scanner Drive Motor; Scanner wire
4–5 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 . Fi...
Page 198 - Assembling the Mirror Positioning; ) Pull the arm out of the main frame, and extend; Position A
4–6 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 3. Assembling the Mirror Positioning Tool 1) Remove the screw from position B. Figure 4-208 2) Put the screw removed in step 1) to position A; then, tighten it slightly. 3) Pull the arm...
Page 199 - Routing the Scanner Cable
4–7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 4. Routing the Scanner Cable Caution:You must keep the mirror positioning tool (FY9-3009) and the pulley clip (FY9-3010) near athand when routing the scanner cable.Assemble the mirror p...
Page 202 - B. Lens Drive Assembly; Removing the Lens Drive Motor
4–10 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM B. Lens Drive Assembly 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 t...
Page 203 - ) Remove the two screws
4–11 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 b...
Page 204 - Routing the Lens Cable; Figure 4-222 Lens Drive Assembly; ) Stop the lens cable at each pulley
4–12 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 2. Routing the Lens Cable 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 cab...
Page 205 - Positioning the Change Solenoid
4–13 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 soleno...
Page 206 - Removing the Main Motor Unit; ) Disconnect the two connectors; Routing the Drive Belt
4–14 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 . Figure 4-224 2. Routing...
Page 207 - Points to Note When Installing the
4–15 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM III. PICK-UP/FEEDING SYSTEM A. Pick-Up Assembly 1. Removing the Pick-Up Roller Unit 1) Remove the lower rear cover.2) Remove the grip ring q , and remove the pick- up clutch w . Refere...
Page 208 - Removing the Separation Pad
4–16 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 5. Adjusting the Left/Right Registration Make adjustments so that the image position is as indicated in Figure 4-308 when the Test Sheet iscopied in Direct. a. Pick-Up from the Cassett...
Page 209 - B. Multifeeder Assembly; Roller Unit
4–17 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 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 . Figure...
Page 211 - bly Paper Guide Plate Cam
4–19 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 . Figur...
Page 212 - bly; Removing the Registration Clutch; Hole
4–20 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM C. Registration Roller Assem- bly 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 regis...
Page 213 - ) Remove the upper registration roller; Removing the Lower Registration; bushing
4–21 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM Figure 4-324 Caution:At this time, take care so that the springs at thefront and the rear will not fly away. 3) Remove the upper registration roller e by lifting it. Figure 4-325 3. Re...
Page 214 - Removing the Feeding Belt
4–22 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM D. Feeding Assembly 1. Removing the Feeding Belt 1) Remove the mounting screw w , and remove the feeding center guide w . 2) Pull the feeding roll e toward the fixing assem- bly, and r...
Page 215 - F. Duplexing Assembly; Removing the Duplexing Assembly
4–23 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM F. Duplexing Assembly 1. Removing the Duplexing Assembly Inlet Unit 1) Remove the left cover.2) Remove the delivery roller.3) Disconnect the connector q , and remove the duplexing unit...
Page 216 - sette Unit
4–24 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM G. Cassette Unit 1. Removing the Copier from the Cas- sette Unit 1) Disconnect the copier’s power plug.2) Disconnect the cassette unit connector q from the copier. Figure 4-334 3) Hold...
Page 217 - Points to Note When Installing the
4–25 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. Figure 4-338 5. R...
Page 218 - Removing the Cassette Driver PCB
4–26 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 t...
Page 219 - Removing the Pedestal Motor Drive
4–27 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 . Figure 4-347 11.Removing the Driver PCB (Cassette Module-A2/Cas...
Page 220 - Removing the Lifter Wire
4–28 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM Figure 4-351 (left) 3) Slide out the paper deck slowly to the front. 3. Removing the Lifter Wire 1) Remove the paper deck.2) Remove the deck front cover.3) Remove the two screws q from...
Page 223 - Removing the Feeding Roller
4–31 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 6. Points to Note a. The collars for the pick-up roller are identified by color; use the gold collar for the front, and thesilver collar for the rear. b. Do not separate the rubber por...
Page 224 - Removing the Separation Roller; Front of copier
4–32 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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. Figure 4-367 9. Removing the ...
Page 225 - ration Roller; If double feeding or pick-up failure occurs fre-; leasing Solenoid; Install the solenoid so that the pick-up roller arm
4–33 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 11.Adjusting the Pressure of the Sepa- ration Roller If double feeding or pick-up failure occurs fre- quently during pick-up operation, adjust the posi-tion of the pressure spring for ...
Page 226 - A. Illuminating Assembly; rescent Heater
4–34 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM IV. EXPOSURE SYSTEM A. Illuminating Assembly 1. Removing the Scanning Lamp/Fluo- rescent Heater 1) Disconnect the power plug.2) Remove the copyboard glass.3) Remove the upper rear cove...
Page 227 - Removing the Blank Exposure Lamp
4–35 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 3. Removing the Blank Exposure Lamp 1) Remove the blank exposure lamp. (See “Re- moving the Blank Exposure Assembly.”) 2) Remove the four screws q , and disconnect the connector w . Fi...
Page 228 - Routing the Blank Shutter Cable
4–36 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 6. Routing the Blank Shutter Cable Figure 4-410 7. Adjusting the Left/Right Margin Po- sition Turn the blank adjusting screw on the front plate shown in Figure 4-411 so that the measur...
Page 229 - Installing the Lens Heater
4–37 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 sizesensor q tog...
Page 230 - CHARGING SYSTEM; Removing the Drum Unit; ) Pull out the drum unit
4–38 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM V. CHARGING SYSTEM 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. Figure 4-501 3) ...
Page 231 - Removing the Primary Charging Unit
4–39 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM B. Primary Charging Assem- bly 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 th...
Page 232 - Positioning the Primary Charging; Removing the Transfer Roller
4–40 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 t...
Page 233 - Installing the Drum Heater
4–41 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM D. Drum Heater* * This may not be available for sale in some areas. 1. Installing the Drum Heater 1) Remove the transfer guide from the copier.2) Install the cord clamp w to the heater...
Page 234 - TEM; Removing the Developing Assembly
4–42 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 1) Remove the developing assembly from the copier. 2) Remove the four screws q , and remove the developing cover w . Figure 4-602 3) Place a newspaper or the like on the floor or a des...
Page 235 - Removing the Developing Cylinder
4–43 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 5) Remove the three E-rings u , and gear i , gear o , and gear !0 . Figure 4-606 6) Remove the screw !1 , and remove the butting roll !2 and roll case !3 . Figure 4-607 7) Remove the d...
Page 236 - Installing the Side Seal and the Blade
4–44 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 8) Remove the side seal !5 . (both sides) Figure 4-609 Figure 4-610 4. Installing the Side Seal and the Blade Assembly 1) Clean the area where the side seal will be installed with alco...
Page 237 - FIXING SYSTEM; Removing the Upper Fixing Unit; fixing assembly cover
4–45 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM VII. FIXING SYSTEM 1. Construction Figure 4-701 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 assemb...
Page 238 - Removing the Fixing Roller
4–46 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 5) Open the fixing shutter t with the screw driver inserted into the hole u , after lifting the fixing shutter. Figure 4-704 6) Pull out the upper fixing unit slowly toward the rear. C...
Page 239 - Points to Note after Replacing the
4–47 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM 15 14 13 13 13 10 11 12 8) Push the thermal switch t in the direction of the arrow, and remove it. Figure 4-708 9) Remove the screw y , and remove the metal plate u . Figure 4-709 10) ...
Page 240 - Removing the Lower Fixing Unit
4–48 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM Figure 4-715 4) Remove the lower fixing roller r together with the bushing. Figure 4-716 5) Remove the bushing y from the front, and remove the HOT warning cover u . Figure 4-717 6) Re...
Page 241 - Adjusting the Lower Fixing Roller
4–49 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 4- 718; otherwise, turn ...
Page 242 - B. Composite Power Supply; ply PCB
4–50 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) MECHANICAL SYSTEM B. Composite Power Supply PCB 1. Removing the Composite Power Sup- ply PCB 1) Remove the lower rear cover and the left cover.2) Disconnect all connectors of the composite power supply ...
Page 243 - ) Remove the grounding wire; Points to Note When Replacing the; • After replacement, perform the following:
4–51 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 . Figure 4-803 C. AE Sensor PCB 1. Points to N...
Page 245 - VI. CASSETTE HEATER KIT 5 INSTALLATION; mechanisms and run necessary checks after installation.
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 5 INSTALLATION VI. CASSETTE HEATER KIT 5 INSTALLATION PROCEDURE .......................................... 5-16A. Unpacking .......................................... 5-16B. Installation (to copying ...
Page 247 - I. SELECTING THE SITE; Keep the following in mind when selecting the
5 – 1 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) I. SELECTING THE SITE Keep the following in mind when selecting the site of installation; if possible, pay a visit to theuser’s before the delivery of the machine.• The site must provide a...
Page 248 - II. UNPACKING AND INSTALLING THE COPIER; A. Unpacking and Removing Fixings
5 – 2 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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...
Page 249 - Step
5 – 3 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Step 6 7 8 Work Open the front cover, and push thelever found on the left side up inthe direction of the arrow to openthe copier’s top body. Pull up the spacer (front and rear,1 pc. each) ...
Page 250 - Work
5 – 4 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Work Pull the developing locking levertoward the front, and turn it clock-wise to release it. Remove the knob, and remove thedummy drum from the copier.(Keep the knob for later.) Remove th...
Page 251 - B. Turning On the Copier
5 – 5 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Turning On the Copier Work Connect the power plug to thepower outlet. Turn on the power switch. Turn off the power switch. Supply toner according to theinstructions given on the tonersu...
Page 253 - C. Checking the Images and Operations
5 – 7 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Checking the Images and Operations Work Place the Test Sheet on thecopyboard, and check the copies. Make copies in manual mode. Make sure that the external coversare free of scratches a...
Page 254 - D. Attaching the Drum Unit; Knob
5 – 8 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D. Attaching the Drum Unit Step 1 2 3 4 Checks/Remarks Take care not to damage the surface of the drum and notto touch the primary charging roller. Be sure to insert the drum unit straight...
Page 255 - E. Changing the Cassette Size
5 – 9 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 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 t...
Page 257 - III. RELOCATING THE COPIER
5 – 1 1 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Step 1 2 3 4 5 Work Move the lens to the Direct position. Take out the drum unit. Fix the scanner in place. Tape the front door and deliveryassembly in place. Place 11 × 17/A3 copy paper...
Page 258 - IV. REPLACING THE DRUM UNIT; Go through the following when replacing the drum unit:
5 – 1 2 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) IV. REPLACING THE DRUM UNIT Go through the following when replacing the drum unit: Step 1 2 3 4 5 6 7 Work Turn off the copier, and open thefront door and the copier’s top unit. Release ...
Page 260 - CONTROL CARD IV N
5 – 1 4 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) V. INSTALLING THE CONTROL CARD IV N Caution:Be sure to disconnect the copier’s power plugbefore starting the installation work. 1) Open the front cover2) Open the copier’s top body by op...
Page 261 - 1) Connect the connector
5 – 1 5 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 11) Connect the connector t of the Control Card IV N. Figure 5-504 12) Connect the copier’s power plug, and turn on its power switch to check the operation of theControl Card IV N. t
Page 263 - ) Remove both top and bottom cassettes, and
5 – 1 7 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Connector Support member Screw Connector cover Cassette heater Screws Mounting plate 1 Front cover Front lower cover Rear cover B. Installation (to copying machine) 1) Remove both top an...
Page 264 - ) Fix the mounting plate 1 in place to the copier’s
5 – 1 8 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Connector on the heater Connector on the copier Screws Cassette heater Heater mounting hole 5) Put the screw back, and tighten it.6) Insert the bend found at the rear of the heater into ...
Page 266 - ) Remove the cassettes and all rear covers from
5 – 2 0 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Cassette heater Screw Mounting plate 2 Screws C. Installation (to a Cassette Feeding Module-A2/B2/Cassette Feeding Unit-K1) 1) Remove the cassettes and all rear covers from the cassette ...
Page 267 - ) Install the cord clamp to the hole in the rear side; • Cassette Feeding Module-B2
5 – 2 1 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6) Close the cover.7) Connect the connector on the relay harness to the connector of the cassette heater (rear sideplate of the cassette feeding unit/module). (Con-nect the side where th...
Page 268 - 0) Lead the other connector on the relay harness; 2) Fix the relay harness in place to the rear side
5 – 2 2 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10) Lead the other connector on the relay harness through the copier’s bottom plate as shown. Figure 5-617 11) Connect the connector on the relay harness with the copier’s connector. Fig...
Page 269 - • Cassette Feeding Module-A2
5 – 2 3 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) • Cassette Feeding Module-A2 Figure 5-620 Caution:Make sure that the relay harness is outside thearea indicated by dashed lines to prevent it frominterfering with the feet of the cassett...
Page 270 - VII. CASSETTE HEATER KIT 7 INSTALLATION PRO-
5 – 2 4 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) VII. CASSETTE HEATER KIT 7 INSTALLATION PRO- CEDURE A. Unpacking Open the shipping box, and make sure that none of the parts indicated Fig. 5-701 is missing. Figure 5-701 1 2 3 4 5 6 7 8...
Page 272 - ) Connect the relay harness to the heater.; ) Connect the relay harness to the connector on
5 – 2 6 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7) Connect the relay harness to the heater. Figure 5-706 8) Install the heater to the paper deck, and fix it in place with a screw (black; M4 × 6). Figure 5-707 Relay harness Screw Heate...
Page 273 - C. Attaching the Ratings; ) Peel the backing sheet from the label, and
5 – 2 7 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Attaching the Ratings Label 1) Peel the backing sheet from the label, and attach the label to the rear cover of the pedestalas indicated. Figure 5-709 2) Connect the heater’s power pl...
Page 274 - B. Installation to the Copier
5–28 INSTALLATION COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Installation to the Copier Caution:This model may not be available for sale insome areas. Caution:Keep the following in mind when installing theRDD to the copier: 1. This Accessory is to...
Page 283 - PERIODICALLY REPLACED PARTS; A. Periodically Replaced Parts; Life
MAINTENANCE AND SERVICING COPYRIGHT © 1996 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–1 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 performa...
Page 284 - II. DURABLES AND CONSUMABLES
MAINTENANCE AND SERVICING COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–2 Parts name Pick-up roller Pick-up separation pad Multifeeder pick-up roller Multifeeder separation pad Halogen Lamp Fixing cleaning roller Oil-applying roller Transfer roller Fi...
Page 285 - and Cassette Feeding Unit-K1
MAINTENANCE AND SERVICING COPYRIGHT © 1996 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–3 No. 1 2 Parts name Pick-up roller Pick-up separation pad Parts No. FB2-2251-000 FG5-3614-000 Life (copies) 100,000 100,000 Q’ty 1 through 3 1 through 3 Remarks Actual copies mad...
Page 287 - A. Scheduled Maintenance Work
MAINTENANCE AND SERVICING COPYRIGHT © 1996 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–5 : clean : replace ✩ : lubricate : adjust : check or clean IV. SERVICING CHART Caution:Do not use solvents or oils other than those indicated. A. Scheduled Maintenance Work every...
Page 289 - APPENDIX
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) APPENDIX A. GENERAL TIMING CHART ..................... A-1B. SIGNALS AND ABBREVIATIONS ........... A-2C. GENERAL CIRCUIT DIAGRAM ............... A-5D. DC CONTROLLER CIRCUIT DIAGRAM ... A-7E. COMPOSITE POWER ...
Page 291 - A. GENERAL TIMING CHART
A – 1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A. GENERAL TIMING CHART , , , , , , Q Q Q Q Q Q S S S S S S ¢ ¢ ¢ ¢ ¢ ¢ ¤ ¤ ¤ ¤ ¤ ¤ , , Q Q S ¢ ¢ ¤ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Sequence STBY INTR AER SCFW SCRV SCFW ...
Page 292 - B. SIGNALS AND ABBREVIATIONS
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A – 2 B. SIGNALS AND ABBREVIATIONS 1. Signals A/A* HORIZONTAL REGISTRATION / DELIVERY/ DUPLEX MOTOR PHASE A ACBIAS DEVELOPING AC BIAS VOLTAGE DETECTION signal AE AE SENSOR OUTPUT signal AE AEREF AE SENSOR RE...
Page 295 - C. GENERAL CIRCUIT DIAGRAM; not available
A–5 APPENDIX COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. GENERAL CIRCUIT DIAGRAM not available
Page 297 - D. DC CONTROLLER CIRCUIT DIAGRAM
A – 7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D. DC CONTROLLER CIRCUIT DIAGRAM DC Controller (1/14) + 123456789 10 11 1213141516171819202122232425262728 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 85 86 87 8...
Page 311 - E. COMPOSITE POWER SUPPLY CIRCUIT DIAGRAM
A – 2 1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) E. COMPOSITE POWER SUPPLY CIRCUIT DIAGRAM Composite Power Supply PCB (1/6) 1/6 C2 + + + + + + + + COMP 3 2 4 1 765 8 1 5 4 2 8 9 15 9 8 7 6 11 18 17 2 3 1 4 1 2 3 4 5 1 2 2 1 1 2 3 2 1 4 5 1 3 2 HEAT...
Page 313 - PRIMARY
A – 2 3 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Composite Power Supply PCB (3/6) 1 2 J3 1 2 MV-L MRES HV-L HV-L HV-H HV-H HV-L HV-H P-CTRL-S P-CUR-S PDC-S BIAS-S AC-BCAS ACBIAS-ON 24V +5FBT 24V +5FBT 24V F4 R64 R67 R75 R76 R87 R97 PDC-S R91 R88 R8...
Page 314 - DISCHARGE
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A – 2 4 Composite Power Supply PCB (4/6) MV-L MV-H C70 C74 C76 C75 C77 C72 C71 C78 C80 C79 C81 J-CTRL J-LVL-CTRL U8A U8B 5 6 7 84 24V 24V + - 1 3 84 + - 2 R109 R110 R105 D36 Q21 D35 R100 R101 C73 D28 D29 D30...
Page 317 - F. CONTROL PANEL KEY PCB
A – 2 7 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) F. CONTROL PANEL KEY PCB Control Panel Key PCB (1/3) 1 2 3 4 5 6 7 8 910111213 1 2 3 4 5 6 7 8 91011121314 1 2 3 4 5 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13SEG14 DG0...
Page 321 - G. AE SENSOR CIRCUIT DIAGRAM
A–31 APPENDIX COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) G. AE SENSOR CIRCUIT DIAGRAM PD601 C601 +24V Q601 1 2 3 R601 8 4 R603 R602 R605 +24V J601 C602 4 1 +24V 6 5 R604 - + AEREF J601 3 J601 AEDATA J601 2 8 4 7 Q601 - +
Page 322 - H. INTENSITY SENSOR CIRCUIT DIAGRAM
A–32 APPENDIX COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) H. INTENSITY SENSOR CIRCUIT DIAGRAM FROMPOWERSUPPLY J403 WHITE W1 W2 AC INPUT CABLE 12 J402 12 R402 R403 L401 140uH 7A D404 D403 D401 D402 2 1 Q401 3 4 R401 HTON GND +5V +5V HTON GND HTTRIG GND...
Page 323 - TONER LEVEL DETECTION CIRCUIT DIAGRAM
A–33 APPENDIX COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) I. TONER LEVEL DETECTION CIRCUIT DIAGRAM R769 D762 2 3 8 4 - + +24V 1 2 J752 J752 ADJ- ADJ+ 1 2 3 1 2 3 1 GNDB TNEMP 24VB SENSOR GNDB GNDB BIAS J754 J754 J754 J751 J751 J751 2 1 Q762 3 +24V R76...
Page 331 - N. CASSETTE FEEDING UNIT-K1 GENERAL CIRCUIT DIAGRAM; Cassette pedestal controller PCB
A – 4 1 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) N. CASSETTE FEEDING UNIT-K1 GENERAL CIRCUIT DIAGRAM M 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 1 2 3 4 5 6 CL3 Cassette 5 pick-up clutch J102F 10 9 8 7 6 5 4 3 2 1 14 13 12 11 10 9 8 7 6 5 4 3 2 1...
Page 335 - P. PAPER DECK PEDESTAL-K1 GENERAL CIRCUIT DIAGRAM
A – 4 5 COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) P. PAPER DECK PEDESTAL-K1 GENERAL CIRCUIT DIAGRAM CL J92F 3 2 1 J94F 3 2 1 J95F 3 2 1 J91F 3 2 1 J93F 3 2 1 J90F 3 2 1 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 J86RJ86P CL9 Deck lifter...
Page 336 - Q. PAPER DECK PEDESTAL-K1 DRIVER CIRCUIT DIAGRAM
COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A – 4 6 Q. PAPER DECK PEDESTAL-K1 DRIVER CIRCUIT DIAGRAM CLR C104 C103 D113 Q113 5 6 PR D CK 2 3 Q120 4 1 +5V Q Q +5V R103 C105 C121 Q121 +5V 14 7 VCC GND C120 Q120 +5V 14 7 VCC GND 9 10 8 Q111 +5V Q114 R111...
Page 340 - This publication is printed on
PRINTED IN JAPAN (IMPRIME AU JAPON) 0398S1.11-1 This publication is printed on 70% reprocessed paper.
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