Service Manual
Page 3
...manual consists of the following chapters: Chapter 1 General Description introduces the machine's features, specifications, names of operation used for the machine's pickup/feeding system. Chapter 2 Basic Operation explains how copies are operated, and shows how they may be disassembled/assembled and ...timing chart and general circuit diagrams. COPYRIGHT © 1999 CANON INC. INTRODUCTION This service manual has been prepared for the PC800/900 Series machines, providing basic information used for servicing the machines in the field so as to their quality and performance....
...manual consists of the following chapters: Chapter 1 General Description introduces the machine's features, specifications, names of operation used for the machine's pickup/feeding system. Chapter 2 Basic Operation explains how copies are operated, and shows how they may be disassembled/assembled and ...timing chart and general circuit diagrams. COPYRIGHT © 1999 CANON INC. INTRODUCTION This service manual has been prepared for the PC800/900 Series machines, providing basic information used for servicing the machines in the field so as to their quality and performance....
Service Manual
Page 9
...8-21 C. Copyboard Glass 7-16 D. Feeding System 8-26 E. SCHEDULED SERVICING ....... 10-1 IV. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) vii POWER SUPPLY SYSTEM ... Original Jams ..... 8-16 J. SELECTING A SITE 9-1 II. UNPACKING AND INSTALLATION 9-2 A. MOVING THE MACHINE .......... 9-12 CHAPTER 10 MAINTENANCE AND SERVICING I . Electrical System 7-21 CHAPTER 8 ADF I . Unpacking...-2 A. Outline of the Power Supply System 7-3 B. Pickup Operation 8-8 F. Placing Copy Paper 9-9 III. Protecting the Power Supply Circuit 7-6 III. Power Supply 8-17 ...
...8-21 C. Copyboard Glass 7-16 D. Feeding System 8-26 E. SCHEDULED SERVICING ....... 10-1 IV. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) vii POWER SUPPLY SYSTEM ... Original Jams ..... 8-16 J. SELECTING A SITE 9-1 II. UNPACKING AND INSTALLATION 9-2 A. MOVING THE MACHINE .......... 9-12 CHAPTER 10 MAINTENANCE AND SERVICING I . Electrical System 7-21 CHAPTER 8 ADF I . Unpacking...-2 A. Outline of the Power Supply System 7-3 B. Pickup Operation 8-8 F. Placing Copy Paper 9-9 III. Protecting the Power Supply Circuit 7-6 III. Power Supply 8-17 ...
Service Manual
Page 11
NAMES OF PARTS 1-10 A. USING THE MACHINE 1-15 A. Outline 1-20 COPYRIGHT © 1999 CANON INC. Copier 1-2 B. ROUTINE MAINTENANCE BY THE USER 1-17 VI. ADF 1-8 III. FEATURES 1-1 II. SPECIFICATIONS 1-2 A. Cross Section 1-13 IV. IMAGE FORMATION 1-20 A. External View 1-10 B. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) I. Control Panel 1-15 V. CHAPTER 1 GENERAL DESCRIPTION This chapter provides specifications of the machine, instructions on how to operate the machine, and an outline of copying process.
NAMES OF PARTS 1-10 A. USING THE MACHINE 1-15 A. Outline 1-20 COPYRIGHT © 1999 CANON INC. Copier 1-2 B. ROUTINE MAINTENANCE BY THE USER 1-17 VI. ADF 1-8 III. FEATURES 1-1 II. SPECIFICATIONS 1-2 A. Cross Section 1-13 IV. IMAGE FORMATION 1-20 A. External View 1-10 B. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) I. Control Panel 1-15 V. CHAPTER 1 GENERAL DESCRIPTION This chapter provides specifications of the machine, instructions on how to operate the machine, and an outline of copying process.
Service Manual
Page 13
... cassette). • In manual feed mode, paper may expect quality copy images at all times as long as a business card. 5. All-in 1% increments. 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-1 multifeeder type). 7. Separate top unit • The machine's top unit may contain as many as a single entity (cartridge...
... cassette). • In manual feed mode, paper may expect quality copy images at all times as long as a business card. 5. All-in 1% increments. 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-1 multifeeder type). 7. Separate top unit • The machine's top unit may contain as many as a single entity (cartridge...
Service Manual
Page 27
... [10] No. USING THE MACHINE A. Name 1 Copy density adjusting lever 2 Copy density mode indicator 3 Default ratio indicator 4 Paper selection indicator*1 5 Jam indicator 6 Count/ratio indicator 7 Clear/stop key 8 Copy start key 9 Power switch Figure 1-401 Description Adjusts the density of copies or reproduction ratio. •...: cassette Copy density: auto mode Starts copying. Indicates the selected default ratio. Indicates the selected cassette/ manual feed tray.If there is no paper loaded, it flashes. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s...
... [10] No. USING THE MACHINE A. Name 1 Copy density adjusting lever 2 Copy density mode indicator 3 Default ratio indicator 4 Paper selection indicator*1 5 Jam indicator 6 Count/ratio indicator 7 Clear/stop key 8 Copy start key 9 Power switch Figure 1-401 Description Adjusts the density of copies or reproduction ratio. •...: cassette Copy density: auto mode Starts copying. Indicates the selected default ratio. Indicates the selected cassette/ manual feed tray.If there is no paper loaded, it flashes. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s...
Service Manual
Page 29
...wipe it. Zoom Figure 1-501 2) Place about 10 sheets of the ADF. 3) Press the Copy Start key. • Copy paper will indicate 'U6'. Caution: • You cannot start feeder cleaning mode while the machine is making copies or if an error exists. • The auto power-off mechanism does not operate while ...Mode 1) Turn on the original tray of blank copy paper (A4/LTR) on the machine, and hold down the Copy Density Mode Selection key for 4 sec or more. • The count/ratio indicator will be soiled or copy paper tends to end the mode. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN ...
...wipe it. Zoom Figure 1-501 2) Place about 10 sheets of the ADF. 3) Press the Copy Start key. • Copy paper will indicate 'U6'. Caution: • You cannot start feeder cleaning mode while the machine is making copies or if an error exists. • The auto power-off mechanism does not operate while ...Mode 1) Turn on the original tray of blank copy paper (A4/LTR) on the machine, and hold down the Copy Density Mode Selection key for 4 sec or more. • The count/ratio indicator will be soiled or copy paper tends to end the mode. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN ...
Service Manual
Page 33
Image exposure 7. Drum cleaning 3. Transfer Manual feed 5. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-21 Fixing 4. Separation Registration : Flow of copy paper Cassette : Rotation of the following seven steps: Step 1 Primary charging...separation + static eliminator; Primary charging 2. Development Delivery 6. CHAPTER 1 GENERAL DESCRIPTION The machine's image formation process consists of the photosensitive drum Figure 1-602 COPYRIGHT © 1999 CANON INC. positive DC) Step 6 Fixing Step 7 Drum cleaning Static latent image formation ...
Image exposure 7. Drum cleaning 3. Transfer Manual feed 5. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-21 Fixing 4. Separation Registration : Flow of copy paper Cassette : Rotation of the following seven steps: Step 1 Primary charging...separation + static eliminator; Primary charging 2. Development Delivery 6. CHAPTER 1 GENERAL DESCRIPTION The machine's image formation process consists of the photosensitive drum Figure 1-602 COPYRIGHT © 1999 CANON INC. positive DC) Step 6 Fixing Step 7 Drum cleaning Static latent image formation ...
Service Manual
Page 37
... charging roller Image formation system Drum cleaning block Photosensitive drum Developing assembly Copy tray Feeding Fixing assembly/ delivery assembly Transfer/ separation Cassette Figure 2-101 Pickup control block Manual feed block Pickup/ feeding system COPYRIGHT © 1999 CANON INC. Functional Construction The machine consists of four functional blocks: pickup/feeding system, exposure system, image...
... charging roller Image formation system Drum cleaning block Photosensitive drum Developing assembly Copy tray Feeding Fixing assembly/ delivery assembly Transfer/ separation Cassette Figure 2-101 Pickup control block Manual feed block Pickup/ feeding system COPYRIGHT © 1999 CANON INC. Functional Construction The machine consists of four functional blocks: pickup/feeding system, exposure system, image...
Service Manual
Page 56
Controlling the Copying Speed The machine uses a halogen lamp for scanning, and the heat of the copyboard. To prevent possible overheating of the copyboard glass, the temperature of the scanner is reduced to 6 cpm. At the end of copying, if the reading of the copying job. ture of the lamp ...SCRV SCFW SCRV SCFW SCRV LSTR STBY ,,, Check timing by a thermistor (TH2); Figure 3-106 3-6 COPYRIGHT © 1999 CANON INC. If this mechanism turns on during continuous copying, it remains on again next time, the scanner is turned off and then on until the end of the thermistor is...
Controlling the Copying Speed The machine uses a halogen lamp for scanning, and the heat of the copyboard. To prevent possible overheating of the copyboard glass, the temperature of the scanner is reduced to 6 cpm. At the end of copying, if the reading of the copying job. ture of the lamp ...SCRV SCFW SCRV SCFW SCRV LSTR STBY ,,, Check timing by a thermistor (TH2); Figure 3-106 3-6 COPYRIGHT © 1999 CANON INC. If this mechanism turns on during continuous copying, it remains on again next time, the scanner is turned off and then on until the end of the thermistor is...
Service Manual
Page 101
...PCB. The level of the DC bias. (See Table 4-102.) Reference: The machine applies a DC bias over a non-copy image area (between the copy image area (-625 V) and the non- CHAPTER 4 IMAGE FORMATION SYSTEM d. Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main motor (M1... bias Primary AC bias -400V -625V Figure 4-104 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-7 copy image area (-400 V). Switching the DC Bias Level The machine switches the DC bias level between sheets) so as to prevent charging the ...
...PCB. The level of the DC bias. (See Table 4-102.) Reference: The machine applies a DC bias over a non-copy image area (between the copy image area (-625 V) and the non- CHAPTER 4 IMAGE FORMATION SYSTEM d. Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main motor (M1... bias Primary AC bias -400V -625V Figure 4-104 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-7 copy image area (-400 V). Switching the DC Bias Level The machine switches the DC bias level between sheets) so as to prevent charging the ...
Service Manual
Page 104
...(-14.6 µA) is applied to the transfer charging roller during initial rotation executed each time the Copy Start key is pressed. A current of the Transfer Bias (cleaning bias) The machine uses a direct charging method, allowing toner to move from the roller to go '0', so that ... bias (ATVC) Transfer bias 1.2sec (approx.) 0.8sec (approx.) 0.7sec (approx.) 1.6sec(approx.) Figure 4-106 4-10 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The microprocessor (Q900) on the composite power supply PCB causes the transfer positive...
...(-14.6 µA) is applied to the transfer charging roller during initial rotation executed each time the Copy Start key is pressed. A current of the Transfer Bias (cleaning bias) The machine uses a direct charging method, allowing toner to move from the roller to go '0', so that ... bias (ATVC) Transfer bias 1.2sec (approx.) 0.8sec (approx.) 0.7sec (approx.) 1.6sec(approx.) Figure 4-106 4-10 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The microprocessor (Q900) on the composite power supply PCB causes the transfer positive...
Service Manual
Page 108
...DC controller PCB may be set . CHAPTER 4 IMAGE FORMATION SYSTEM 4. Developing DC bias Voltage supplied to the setting used for normal copying when toner save mode or photo mode is set during auto density correction and how the density adjusting lever is selected. The density ...correction switch (SW101) affects both manual density adjustment and auto density adjustment (AE). CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) SW101 Figure 4-108 If the machine is not equipped with a density correction switch (SW101), the image density changes in AE ...
...DC controller PCB may be set . CHAPTER 4 IMAGE FORMATION SYSTEM 4. Developing DC bias Voltage supplied to the setting used for normal copying when toner save mode or photo mode is set during auto density correction and how the density adjusting lever is selected. The density ...correction switch (SW101) affects both manual density adjustment and auto density adjustment (AE). CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) SW101 Figure 4-108 If the machine is not equipped with a density correction switch (SW101), the image density changes in AE ...
Service Manual
Page 110
The AE mechanism enables production of copies free of fogging as long as the original is equipped with an auto density adjustment (AE) mechanism designed to the density of the original. Outline The machine is more or less uniform in density by varying the DC component of the developing... bias according to control the DC component of Originals 1. Measuring the Density of the developing bias. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN...
The AE mechanism enables production of copies free of fogging as long as the original is equipped with an auto density adjustment (AE) mechanism designed to the density of the original. Outline The machine is more or less uniform in density by varying the DC component of the developing... bias according to control the DC component of Originals 1. Measuring the Density of the developing bias. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN...
Service Manual
Page 115
... drum Non-image area in Reduce mode A: Position of the side blanking lamp in Direct and Reduce mode B: Position of excess toner when making reduced copies. 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-21 Operations To blank out the non-image area in reduce mode, the side... lamp in relation to the distance over which the lens moves as detected by the lens shift detecting shaft. CHAPTER 4 IMAGE FORMATION SYSTEM G. Outline The machine is moved in Reduce mode Figure 4-122 COPYRIGHT © 1999...
... drum Non-image area in Reduce mode A: Position of the side blanking lamp in Direct and Reduce mode B: Position of excess toner when making reduced copies. 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-21 Operations To blank out the non-image area in reduce mode, the side... lamp in relation to the distance over which the lens moves as detected by the lens shift detecting shaft. CHAPTER 4 IMAGE FORMATION SYSTEM G. Outline The machine is moved in Reduce mode Figure 4-122 COPYRIGHT © 1999...
Service Manual
Page 117
Cartridge 1. To prevent photo memory, the machine is closed. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-23 CHAPTER 4 IMAGE FORMATION SYSTEM A. Drum Cover Shutter If exposed to expose images....opening used to strong light for a long time, the photosensitive drum can develop photo memory, which can cause white spots or black bands on copies. Outline The machine's photosensitive drum, primary charging roller, developing assembly, and cleaner are housed in the case of the drum cover shutter, the light-blocking shutter ...
Cartridge 1. To prevent photo memory, the machine is closed. COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-23 CHAPTER 4 IMAGE FORMATION SYSTEM A. Drum Cover Shutter If exposed to expose images....opening used to strong light for a long time, the photosensitive drum can develop photo memory, which can cause white spots or black bands on copies. Outline The machine's photosensitive drum, primary charging roller, developing assembly, and cleaner are housed in the case of the drum cover shutter, the light-blocking shutter ...
Service Manual
Page 118
... time, the images will cause no practical problem. Cleaning the Drum Caution: As a rule, do not touch or clean the photosensitive drum. 1) Open the machine's top unit, and take out the cartridge. 2) Turn over the cartridge, and open the drum cover shutter 3) Clean the drum surface with a flannel cloth...to apply a developing bias to rotate it in the direction in a dark place, it will recover to a level at which it rotates when making copies. Do not use a flannel cloth. CHAPTER 4 IMAGE FORMATION SYSTEM 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Caution: 1.
... time, the images will cause no practical problem. Cleaning the Drum Caution: As a rule, do not touch or clean the photosensitive drum. 1) Open the machine's top unit, and take out the cartridge. 2) Turn over the cartridge, and open the drum cover shutter 3) Clean the drum surface with a flannel cloth...to apply a developing bias to rotate it in the direction in a dark place, it will recover to a level at which it rotates when making copies. Do not use a flannel cloth. CHAPTER 4 IMAGE FORMATION SYSTEM 2. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Caution: 1.
Service Manual
Page 120
CHAPTER 4 IMAGE FORMATION SYSTEM C. Removing the Blanking Exposure Unit 1) Set the machine to the maximum ratio (141%) as follows: • Turn on the power, and select a default ratio of 141%. • Press the Copy Start key. • When the lens has moved to the farthest left, turn off the power. • ... Remove the composite power supply PCB. (See Chapter 7.III.E.2."Removing the Composite Power Supply PCB.") 6) Remove the two screws [1]. [1] Figure 4-203 4-26 COPYRIGHT © 1999 CANON INC. Blank Exposure 1. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM C. Removing the Blanking Exposure Unit 1) Set the machine to the maximum ratio (141%) as follows: • Turn on the power, and select a default ratio of 141%. • Press the Copy Start key. • When the lens has moved to the farthest left, turn off the power. • ... Remove the composite power supply PCB. (See Chapter 7.III.E.2."Removing the Composite Power Supply PCB.") 6) Remove the two screws [1]. [1] Figure 4-203 4-26 COPYRIGHT © 1999 CANON INC. Blank Exposure 1. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Service Manual
Page 125
...sensors used to reach the copy tray. PICKUP/FEEDING SYSTEM A. Outline The machine moves paper using a center reference method, in which paper is moved in the middle of the pickup/feeding path, and is equipped with a cassette, multifeeder, and single-feeder as the source of copy paper. it is controlled ... is picked up and is then moved through the transfer, separation, feeding, and fixing assemblies to monitor the movement of paper. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-1 Notation Name PS3 Delivery sensor Remarks PS4 Vertical path roller paper...
...sensors used to reach the copy tray. PICKUP/FEEDING SYSTEM A. Outline The machine moves paper using a center reference method, in which paper is moved in the middle of the pickup/feeding path, and is equipped with a cassette, multifeeder, and single-feeder as the source of copy paper. it is controlled ... is picked up and is then moved through the transfer, separation, feeding, and fixing assemblies to monitor the movement of paper. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-1 Notation Name PS3 Delivery sensor Remarks PS4 Vertical path roller paper...
Service Manual
Page 127
...roller. Cassette pickup solenoid drive signal (CPUSD*) Pickup clutch solenoid drive signal (PUSLD*) Pickup clutch SL5 Copy paper Cassette pickup rollers Figure 5-103 (Multifeeder type) COPYRIGHT © 1999 CANON INC. When the pickup clutch solenoid turns on , the spring causes the pickup roller to rotate slightly,...Arm SL1 When SL5 turns on , the claw moves away from the cassette and is driven at any one time.) 2. Outline The machine has three types of pickup rollers, i.e., cassette pickup roller, multifeeder pickup roller, and single-feeder pickup roller, and each of these ...
...roller. Cassette pickup solenoid drive signal (CPUSD*) Pickup clutch solenoid drive signal (PUSLD*) Pickup clutch SL5 Copy paper Cassette pickup rollers Figure 5-103 (Multifeeder type) COPYRIGHT © 1999 CANON INC. When the pickup clutch solenoid turns on , the spring causes the pickup roller to rotate slightly,...Arm SL1 When SL5 turns on , the claw moves away from the cassette and is driven at any one time.) 2. Outline The machine has three types of pickup rollers, i.e., cassette pickup roller, multifeeder pickup roller, and single-feeder pickup roller, and each of these ...
Service Manual
Page 129
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-5 If the vertical path roller paper sensor does not detect copy paper after re-pickup, the machine will assume the absence of time after the cassette pickup roller has started to rotate, the pickup roller is executed if the... vertical path roller paper sensor (PS4) does not detect copy paper within a specific period of copy paper and will...
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-5 If the vertical path roller paper sensor does not detect copy paper after re-pickup, the machine will assume the absence of time after the cassette pickup roller has started to rotate, the pickup roller is executed if the... vertical path roller paper sensor (PS4) does not detect copy paper within a specific period of copy paper and will...