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...8226; The source of paper may be between 70% and 141% in -One Cartridge for Simple Maintenance • The photosensitive drum, toner case, charging roller, developing assembly, and cleaning assembly are constructed as he/she performs simple replacement/cleaning work immediately after... work . 6. Ecology-Conscious • The use of paper (500-sheet cassette + multifeeder; COPYRIGHT © 1999 CANON INC. All-in 1% increments. 2. Personal Copier with existing Canon machines). 3. The user may be opened to 1/1000 compared with a Zoom Function and a Fixed Copyboard • ...
...8226; The source of paper may be between 70% and 141% in -One Cartridge for Simple Maintenance • The photosensitive drum, toner case, charging roller, developing assembly, and cleaning assembly are constructed as he/she performs simple replacement/cleaning work immediately after... work . 6. Ecology-Conscious • The use of paper (500-sheet cassette + multifeeder; COPYRIGHT © 1999 CANON INC. All-in 1% increments. 2. Personal Copier with existing Canon machines). 3. The user may be opened to 1/1000 compared with a Zoom Function and a Fixed Copyboard • ...
Service Manual
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... lamp (80 V/110 W for 120V-model; 150 V/160 W for 220/240 V-model) Fixed focal point lens OPC drum (24-mm dia.) Table 1-201 Descriptions Indirect static reproduction Roller (direct charging) Slit (moving light source) Auto or manual Dry (...toner projection) Cassette (1 pc.) Single-feeder (single-feeder type) Multifeeder (multifeeder type) Curvature separation + static eliminator Flat heater Blade Center reference (copyboard) Table 1-202 1-2 COPYRIGHT © 1999 CANON INC. CHAPTER 1 GENERAL DESCRIPTION II. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN ...
... lamp (80 V/110 W for 120V-model; 150 V/160 W for 220/240 V-model) Fixed focal point lens OPC drum (24-mm dia.) Table 1-201 Descriptions Indirect static reproduction Roller (direct charging) Slit (moving light source) Auto or manual Dry (...toner projection) Cassette (1 pc.) Single-feeder (single-feeder type) Multifeeder (multifeeder type) Curvature separation + static eliminator Flat heater Blade Center reference (copyboard) Table 1-202 1-2 COPYRIGHT © 1999 CANON INC. CHAPTER 1 GENERAL DESCRIPTION II. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN ...
Service Manual
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Outline The construction of the machine is as follows: Scanning lamp Copyboard glass Fixed focal point lens Side blanking lamp (front, rear) Primary charging roller Developing blade Fixing assembly Cleaning blade Developing cylinder Photosensitive drum Figure 1-601 Transfer charging roller Static eliminator 1-20 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) IMAGE FORMATION A. CHAPTER 1 GENERAL DESCRIPTION VI.
Outline The construction of the machine is as follows: Scanning lamp Copyboard glass Fixed focal point lens Side blanking lamp (front, rear) Primary charging roller Developing blade Fixing assembly Cleaning blade Developing cylinder Photosensitive drum Figure 1-601 Transfer charging roller Static eliminator 1-20 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) IMAGE FORMATION A. CHAPTER 1 GENERAL DESCRIPTION VI.
Service Manual
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Image exposure 7. Drum cleaning 3. Transfer Manual feed 5. Separation Registration : Flow of copy paper Cassette : Rotation of the following seven steps: Step 1 Primary charging (AC + ...4 Transfer (negative DC) Step 5 Separation (curvature separation + static eliminator; Primary charging 2. Fixing 4. Development Delivery 6. positive DC) Step 6 Fixing Step 7 Drum cleaning Static latent image formation block 1. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-21 CHAPTER 1 GENERAL DESCRIPTION The machine's image formation process consists of...
Image exposure 7. Drum cleaning 3. Transfer Manual feed 5. Separation Registration : Flow of copy paper Cassette : Rotation of the following seven steps: Step 1 Primary charging (AC + ...4 Transfer (negative DC) Step 5 Separation (curvature separation + static eliminator; Primary charging 2. Fixing 4. Development Delivery 6. positive DC) Step 6 Fixing Step 7 Drum cleaning Static latent image formation block 1. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-21 CHAPTER 1 GENERAL DESCRIPTION The machine's image formation process consists of...
Service Manual
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... Original illuminating block Optical block Primary 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...
... Original illuminating block Optical block Primary 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...
Service Manual
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...until the Copy Start key is about Measures the density of the original. 10 cm and then moves it in preparation for - a stable drum sensitivity. Neutralizes the drum surface potential as the forward speed used in reverse. • The reverse speed is pressed. From when the Copy Start key is Removes ... when the main motor stops. From when SCRV ends to when the scanner moves for the next copying run. Table 2-101 2-4 COPYRIGHT © 1999 CANON INC. Illuminates the original by the scanning lamp, and the reflected optical image is projected to when the Copy Start key is pressed...
...until the Copy Start key is about Measures the density of the original. 10 cm and then moves it in preparation for - a stable drum sensitivity. Neutralizes the drum surface potential as the forward speed used in reverse. • The reverse speed is pressed. From when the Copy Start key is Removes ... when the main motor stops. From when SCRV ends to when the scanner moves for the next copying run. Table 2-101 2-4 COPYRIGHT © 1999 CANON INC. Illuminates the original by the scanning lamp, and the reflected optical image is projected to when the Copy Start key is pressed...
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Moving/drive parts Photosensitive drum, primary charging roller, developing assembly, transfer charging roller, pickup roller, vertical roller, registration roller, feeding assembly, fixing assembly, delivery roller, heat exhaust fan Control Executes ... Clock pulse generator Main motor (M1) Hall IC output MMCLK Composite power supply PCB Reference signal Main motor drive PCB Figure 2-104 COPYRIGHT © 1999 CANON INC. Error detection Issues 'E010'. Outline Table 2-102 shows the functions of the main motor control circuit, and Figure 2-104 is a block diagram of the...
Moving/drive parts Photosensitive drum, primary charging roller, developing assembly, transfer charging roller, pickup roller, vertical roller, registration roller, feeding assembly, fixing assembly, delivery roller, heat exhaust fan Control Executes ... Clock pulse generator Main motor (M1) Hall IC output MMCLK Composite power supply PCB Reference signal Main motor drive PCB Figure 2-104 COPYRIGHT © 1999 CANON INC. Error detection Issues 'E010'. Outline Table 2-102 shows the functions of the main motor control circuit, and Figure 2-104 is a block diagram of the...
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... (IMPRIME AU JAPON) 3-1 blows at 128°C) Table 3-101 Copyboard glass Enlarge Reduce Moves for enlargement/ reduction Fixed focal point lens Photosensitive drum No. 4/5 mirror unit COPYRIGHT © 1999 CANON INC. Item Lamp Scanning Scanner position detection Ratio variation Lens drive control Scanner drive control Protective function Halogen Description By moving the...
... (IMPRIME AU JAPON) 3-1 blows at 128°C) Table 3-101 Copyboard glass Enlarge Reduce Moves for enlargement/ reduction Fixed focal point lens Photosensitive drum No. 4/5 mirror unit COPYRIGHT © 1999 CANON INC. Item Lamp Scanning Scanner position detection Ratio variation Lens drive control Scanner drive control Protective function Halogen Description By moving the...
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... Optical length F' F L2 F' Enlargement F Optical length L3 Optical length: L1 < L2, L1 < L3 Figure 3-102 3-2 COPYRIGHT © 1999 CANON INC. In the scanner system, the relative speed of the fixed focal point lens and the No. 4/5 mirror are changed by the lens drive system... drive system. Varying the Reproduction Ratio The reproduction ratio in the drum peripheral direction (sub scanning direction) is made higher (for reduction) or lower (for enlargement) than the drum peripheral speed. CHAPTER 3 EXPOSURE SYSTEM B. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON...
... Optical length F' F L2 F' Enlargement F Optical length L3 Optical length: L1 < L2, L1 < L3 Figure 3-102 3-2 COPYRIGHT © 1999 CANON INC. In the scanner system, the relative speed of the fixed focal point lens and the No. 4/5 mirror are changed by the lens drive system... drive system. Varying the Reproduction Ratio The reproduction ratio in the drum peripheral direction (sub scanning direction) is made higher (for reduction) or lower (for enlargement) than the drum peripheral speed. CHAPTER 3 EXPOSURE SYSTEM B. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON...
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CHAPTER 4 IMAGE FORMATION SYSTEM Copyboard glass Scanning lamp AE sensor Side blanking lamp Lens Primary charging roller Developing cylinder Photosensitive drum Drum cartridge Static eliminator Transfer roller Q101 Microprocessor DC controller PCB Lamp regulator block High-voltage circuit block Q900 Microprocessor Composite power supply PCB Figure 4-101 4-2 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM Copyboard glass Scanning lamp AE sensor Side blanking lamp Lens Primary charging roller Developing cylinder Photosensitive drum Drum cartridge Static eliminator Transfer roller Q101 Microprocessor DC controller PCB Lamp regulator block High-voltage circuit block Q900 Microprocessor Composite power supply PCB Figure 4-101 4-2 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Service Manual
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... DC bias Both DC bias and AC bias are applied to the primary charging roller so as to 3000 Vpp (885µA) 4-4 COPYRIGHT © 1999 CANON INC. CHAPTER 4 IMAGE FORMATION SYSTEM C. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The level of the photosensitive...
... DC bias Both DC bias and AC bias are applied to the primary charging roller so as to 3000 Vpp (885µA) 4-4 COPYRIGHT © 1999 CANON INC. CHAPTER 4 IMAGE FORMATION SYSTEM C. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The level of the photosensitive...
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Main transformer T101 CHAPTER 4 IMAGE FORMATION SYSTEM Voltage separation circuit T508 High-voltage transformer for primary charging Primary charging roller Photosensitive drum Amplifier DC bias control signal PDC_PWM DC voltage monitor signal PDC_S AC component current monitor signal PAC_S AC bias output signal PAC_OUT -5 PR_DC_ON J103 J203 -4 Microprocessor (Q900) Composite power supply PCB Serial communication Microprocessor (Q101) Figure 4-103 DC controller PCB COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-5
Main transformer T101 CHAPTER 4 IMAGE FORMATION SYSTEM Voltage separation circuit T508 High-voltage transformer for primary charging Primary charging roller Photosensitive drum Amplifier DC bias control signal PDC_PWM DC voltage monitor signal PDC_S AC component current monitor signal PAC_S AC bias output signal PAC_OUT -5 PR_DC_ON J103 J203 -4 Microprocessor (Q900) Composite power supply PCB Serial communication Microprocessor (Q101) Figure 4-103 DC controller PCB COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-5
Service Manual
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... the level of the DC bias is switched by the DC bias ON signal (serial signal) generated by the cleaning bias from the transfer roller. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-7 Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main ...motor (M1) Scanning lamp (LA1) Primary DC bias Primary AC bias -400V -625V Figure 4-104 COPYRIGHT © 1999 CANON INC. CHAPTER 4 IMAGE FORMATION SYSTEM d. Switching the DC Bias Level The machine switches the DC bias level between sheets) so as to prevent charging the...
... the level of the DC bias is switched by the DC bias ON signal (serial signal) generated by the cleaning bias from the transfer roller. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-7 Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main ...motor (M1) Scanning lamp (LA1) Primary DC bias Primary AC bias -400V -625V Figure 4-104 COPYRIGHT © 1999 CANON INC. CHAPTER 4 IMAGE FORMATION SYSTEM d. Switching the DC Bias Level The machine switches the DC bias level between sheets) so as to prevent charging the...
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CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM D. Controlling the Transfer Roller Bias 1. Outline The circuit shown in ... signal T_FW_DRV Transfer bias control circuit Transfer DC bias ON signal T_FW_ON High-voltage transformer control signal CLK32K +24V T302 Transfer high-voltage transformer Photosensitive drum Transfer charging roller DC controller PCB Figure 4-105 Composite power supply PCB 4-8 COPYRIGHT © 1999...
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM D. Controlling the Transfer Roller Bias 1. Outline The circuit shown in ... signal T_FW_DRV Transfer bias control circuit Transfer DC bias ON signal T_FW_ON High-voltage transformer control signal CLK32K +24V T302 Transfer high-voltage transformer Photosensitive drum Transfer charging roller DC controller PCB Figure 4-105 Composite power supply PCB 4-8 COPYRIGHT © 1999...
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...control, + 1.56µA/2.5 kV max.) will be applied to the transfer roller as follows, thereby returning the toner from the photosensitive drum to the transfer roller. (See Table 4-103.) Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main motor (...Reference 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. Reference: While the transfer charging roller makes a single rotation, the microprocessor (Q900) checks the transfer current detection signal four times, and determines ...
...control, + 1.56µA/2.5 kV max.) will be applied to the transfer roller as follows, thereby returning the toner from the photosensitive drum to the transfer roller. (See Table 4-103.) Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main motor (...Reference 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. Reference: While the transfer charging roller makes a single rotation, the microprocessor (Q900) checks the transfer current detection signal four times, and determines ...
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...When the photosensitive drum rotates and yet developing is not under way, about -500 VDC is used to control the voltage applied to the developing cylinder while copies are being made. Reference : Developing DC bias : -80 ~ -550V Developing AC bias : 1200Vpp ± 10% COPYRIGHT © 1999 CANON INC. Outline... AC bias (turning on and off the static eliminator bias) • Controlling the voltage level of excess toner on the photosensitive drum. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-11 Controlling the Developing/Separation Static Eliminator Bias 1.
...When the photosensitive drum rotates and yet developing is not under way, about -500 VDC is used to control the voltage applied to the developing cylinder while copies are being made. Reference : Developing DC bias : -80 ~ -550V Developing AC bias : 1200Vpp ± 10% COPYRIGHT © 1999 CANON INC. Outline... AC bias (turning on and off the static eliminator bias) • Controlling the voltage level of excess toner on the photosensitive drum. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-11 Controlling the Developing/Separation Static Eliminator Bias 1.
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...Main transformer T101 High-voltage transformer for developing/static eliminator Developing DC bias detection circuit +5V T201 Static eliminator bias generation circuit + Photo sensitive drum Developing cylinder Static eliminator DC bias control signal BIAS_PWM DC bias monitor signal BIAS_S AC bias oscillation signal ACBIAS J103 J203 -3 -6 DV_DC_ON DV_AC_ON ... correction signal AE sensor PCB Control panel Density correction switch (SW101) DC controller PCB Figure 4-107 4-12 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
...Main transformer T101 High-voltage transformer for developing/static eliminator Developing DC bias detection circuit +5V T201 Static eliminator bias generation circuit + Photo sensitive drum Developing cylinder Static eliminator DC bias control signal BIAS_PWM DC bias monitor signal BIAS_S AC bias oscillation signal ACBIAS J103 J203 -3 -6 DV_DC_ON DV_AC_ON ... correction signal AE sensor PCB Control panel Density correction switch (SW101) DC controller PCB Figure 4-107 4-12 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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...bias Voltage supplied to the scanning lamp Toner save mode or photo mode is set during manual density adjustment. 4-14 COPYRIGHT © 1999 CANON INC. SW101 Figure 4-108 If the machine is not equipped with a density correction switch (SW101), the image density changes in reference to...of three levels, enabling correction of foggy images or light images caused as by a change in the output of the photosensitive drum. CHAPTER 4 IMAGE FORMATION SYSTEM 4. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The density correction switch (SW101) affects both manual ...
...bias Voltage supplied to the scanning lamp Toner save mode or photo mode is set during manual density adjustment. 4-14 COPYRIGHT © 1999 CANON INC. SW101 Figure 4-108 If the machine is not equipped with a density correction switch (SW101), the image density changes in reference to...of three levels, enabling correction of foggy images or light images caused as by a change in the output of the photosensitive drum. CHAPTER 4 IMAGE FORMATION SYSTEM 4. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The density correction switch (SW101) affects both manual ...
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...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. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Scanning lamp +24V + +24V + AE sensor J601 J107 -3 -2 ...AEREF +5V -2 -3 AE +24V + VR103 +5V +24V + VR102 (Q101) Developing cylinder Photosensitive drum Microprocessor Microprocessor (Q900) Developing DCON signal Serial communication DC controller PCB Figure 4-113 Composite power supply PCB 4-16 COPYRIGHT © 1999...
...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. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Scanning lamp +24V + +24V + AE sensor J601 J107 -3 -2 ...AEREF +5V -2 -3 AE +24V + VR103 +5V +24V + VR102 (Q101) Developing cylinder Photosensitive drum Microprocessor Microprocessor (Q900) Developing DCON signal Serial communication DC controller PCB Figure 4-113 Composite power supply PCB 4-16 COPYRIGHT © 1999...
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...relation to the distance over which the lens moves as detected by the lens shift detecting shaft. Controlling the Side Blanking Mechanism 1. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-21 Outline The machine is moved in Reduce mode Figure... 4-122 COPYRIGHT © 1999 CANON INC. Rear side blanking lamp Reflecting plate Lens shift detecting shaft Front side blanking lamp (front) Figure 4-121 Reflecting plate A B B A , , Photosensitive drum Non-image area in Reduce mode A: Position of the side blanking...
...relation to the distance over which the lens moves as detected by the lens shift detecting shaft. Controlling the Side Blanking Mechanism 1. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-21 Outline The machine is moved in Reduce mode Figure... 4-122 COPYRIGHT © 1999 CANON INC. Rear side blanking lamp Reflecting plate Lens shift detecting shaft Front side blanking lamp (front) Figure 4-121 Reflecting plate A B B A , , Photosensitive drum Non-image area in Reduce mode A: Position of the side blanking...