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...• Continuous copying is 0 sec (at all times as long as a single entity (cartridge). All-in 1% increments. 2. COPYRIGHT © 1999 CANON INC. Ecology-Conscious • The use of paper (500-sheet cassette + multifeeder; Various Paper Sizes • The paper may be opened to 1/1000 ... In manual feed mode, 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 ...
...• Continuous copying is 0 sec (at all times as long as a single entity (cartridge). All-in 1% increments. 2. COPYRIGHT © 1999 CANON INC. Ecology-Conscious • The use of paper (500-sheet cassette + multifeeder; Various Paper Sizes • The paper may be opened to 1/1000 ... In manual feed mode, 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 ...
Service Manual
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... Fixed Halogen 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 (...feeder type) Multifeeder (multifeeder type) Curvature separation + static eliminator Flat heater Blade Center reference (copyboard) Table 1-202 1-2 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Type Item Body Copyboard Source of light Lens Photosensitive medium 2. Copier ...
... Fixed Halogen 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 (...feeder type) Multifeeder (multifeeder type) Curvature separation + static eliminator Flat heater Blade Center reference (copyboard) Table 1-202 1-2 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Type Item Body Copyboard Source of light Lens Photosensitive medium 2. Copier ...
Service Manual
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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. 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)
Service Manual
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Primary charging 2. Fixing 4. Image exposure 7. Drum cleaning 3. Separation Registration : Flow of copy paper Cassette : Rotation of the following seven steps: Step 1 Primary charging (AC + negative DC) ...DC) Step 5 Separation (curvature separation + static eliminator; CHAPTER 1 GENERAL DESCRIPTION The machine's image formation process consists of the photosensitive drum Figure 1-602 COPYRIGHT © 1999 CANON INC. Development Delivery 6. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-21 Transfer Manual feed 5. positive DC) Step 6 ...
Primary charging 2. Fixing 4. Image exposure 7. Drum cleaning 3. Separation Registration : Flow of copy paper Cassette : Rotation of the following seven steps: Step 1 Primary charging (AC + negative DC) ...DC) Step 5 Separation (curvature separation + static eliminator; CHAPTER 1 GENERAL DESCRIPTION The machine's image formation process consists of the photosensitive drum Figure 1-602 COPYRIGHT © 1999 CANON INC. Development Delivery 6. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-21 Transfer Manual feed 5. positive DC) Step 6 ...
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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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... ratio. From when SCRV ends to when the main motor stops. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) From when the Copy Start key is pressed. photosensitive drum, thereby ensuring ward. While the scanner moves forward about 3.3 as fast...Waits until the Copy Start key is projected to the photosensitive drum through mirrors and lenses. a stable drum sensitivity. Illuminates the original by the scanning lamp, and the reflected optical image is pressed. Neutralizes the drum surface potential as the forward speed used in reverse. CHAPTER 2...
... ratio. From when SCRV ends to when the main motor stops. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) From when the Copy Start key is pressed. photosensitive drum, thereby ensuring ward. While the scanner moves forward about 3.3 as fast...Waits until the Copy Start key is projected to the photosensitive drum through mirrors and lenses. a stable drum sensitivity. Illuminates the original by the scanning lamp, and the reflected optical image is pressed. Neutralizes the drum surface potential as the forward speed used in reverse. CHAPTER 2...
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... (M1) Hall IC output MMCLK Composite power supply PCB Reference signal Main motor drive PCB Figure 2-104 COPYRIGHT © 1999 CANON INC. Executes constant speed rotation control. Outline Table 2-102 shows the functions of the main motor control circuit, and Figure 2-...104 is a block diagram of the circuit. Moving/drive parts Photosensitive drum, primary charging roller, developing assembly, transfer charging roller, pickup roller, vertical roller, registration roller, feeding assembly, fixing assembly, delivery ...
... (M1) Hall IC output MMCLK Composite power supply PCB Reference signal Main motor drive PCB Figure 2-104 COPYRIGHT © 1999 CANON INC. Executes constant speed rotation control. Outline Table 2-102 shows the functions of the main motor control circuit, and Figure 2-...104 is a block diagram of the circuit. Moving/drive parts Photosensitive drum, primary charging roller, developing assembly, transfer charging roller, pickup roller, vertical roller, registration roller, feeding assembly, fixing assembly, delivery ...
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...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. Outline Table 3-101 shows the major functions of the scanning lamp to cut power to overheating of...Scanner drive control Protective function Halogen Description By moving the No. 1 mirror mount By a sensor (scanner home position sensor; Figure 3-101 CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 3-1 OPERATIONS A. CHAPTER 3 EXPOSURE SYSTEM I. PS1) Main scanning ...
...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. Outline Table 3-101 shows the major functions of the scanning lamp to cut power to overheating of...Scanner drive control Protective function Halogen Description By moving the No. 1 mirror mount By a sensor (scanner home position sensor; Figure 3-101 CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 3-1 OPERATIONS A. CHAPTER 3 EXPOSURE SYSTEM I. PS1) Main scanning ...
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...is varied by the lens drive system, and that in the drum peripheral direction (sub scanning direction) is made higher (for reduction) or lower (for enlargement) than the drum peripheral speed. In the scanner system, the relative speed of ...the fixed focal point lens and the No. 4/5 mirror are changed by the scanner drive system. Direct Optical length F' F L1 Reduction 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. CANON...
...is varied by the lens drive system, and that in the drum peripheral direction (sub scanning direction) is made higher (for reduction) or lower (for enlargement) than the drum peripheral speed. In the scanner system, the relative speed of ...the fixed focal point lens and the No. 4/5 mirror are changed by the scanner drive system. Direct Optical length F' F L1 Reduction 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. CANON...
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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)
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...primary charging roller so as to 3000 Vpp (885µA) 4-4 COPYRIGHT © 1999 CANON INC. Outline The circuit shown in Figure 4-103 is switched between when forming copy images and when not forming... copy images. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The level of the... the AC bias to a specific voltage • Switching the level of the photosensitive drum will be uniform. CHAPTER 4 IMAGE FORMATION SYSTEM C. Controlling the Primary Charging Roller Bias 1.
...primary charging roller so as to 3000 Vpp (885µA) 4-4 COPYRIGHT © 1999 CANON INC. Outline The circuit shown in Figure 4-103 is switched between when forming copy images and when not forming... copy images. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The level of the... the AC bias to a specific voltage • Switching the level of the photosensitive drum will be uniform. CHAPTER 4 IMAGE FORMATION SYSTEM C. Controlling the Primary Charging Roller Bias 1.
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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
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...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. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-7 The level of the DC bias. (See Table 4-102.) Reference: The machine ...625 V) and the non- Switching the DC Bias Level The machine switches the DC bias level between sheets) so as to prevent charging the photosensitive drum to switch the level of the DC bias is switched by the DC bias ON signal (serial signal) generated by the cleaning bias from the...
...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. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-7 The level of the DC bias. (See Table 4-102.) Reference: The machine ...625 V) and the non- Switching the DC Bias Level The machine switches the DC bias level between sheets) so as to prevent charging the photosensitive drum to switch the level of the DC bias is switched by the DC bias ON signal (serial signal) generated by the cleaning bias from the...
Service Manual
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... 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 INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM D. Controlling the...
... 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 INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM D. Controlling the...
Service Manual
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...Cleaning bias 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. Switching the Polarity of the Transfer Bias (cleaning bias) The machine uses a direct charging method, allowing toner to move from the photosensitive...the roller to the transfer roller as when a jam occurs if left unattended. To remove excess toner, a positive voltage is applied to the drum: < Timing > • While initial rotation is executed after the Copy Start key is pressed • Part of the period in which the...
...Cleaning bias 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. Switching the Polarity of the Transfer Bias (cleaning bias) The machine uses a direct charging method, allowing toner to move from the photosensitive...the roller to the transfer roller as when a jam occurs if left unattended. To remove excess toner, a positive voltage is applied to the drum: < Timing > • While initial rotation is executed after the Copy Start key is pressed • Part of the period in which the...
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Reference : Developing DC bias : -80 ~ -550V Developing AC bias : 1200Vpp ± 10% COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-11 When the photosensitive drum rotates and yet developing is not under way, about -500 VDC is used to control the voltage applied to the... on and off the AC bias (turning on and off the static eliminator bias) • Controlling the voltage level of excess toner on the photosensitive drum.
Reference : Developing DC bias : -80 ~ -550V Developing AC bias : 1200Vpp ± 10% COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-11 When the photosensitive drum rotates and yet developing is not under way, about -500 VDC is used to control the voltage applied to the... on and off the AC bias (turning on and off the static eliminator bias) • Controlling the voltage level of excess toner on the photosensitive drum.
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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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... lamp as follows in reference to how the density adjusting lever is set during manual density adjustment. 4-14 COPYRIGHT © 1999 CANON INC. The machine corrects the level of the photosensitive drum. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Controlling the Voltage Level of the Developing DC Bias...
... lamp as follows in reference to how the density adjusting lever is set during manual density adjustment. 4-14 COPYRIGHT © 1999 CANON INC. The machine corrects the level of the photosensitive drum. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) Controlling the Voltage Level of the Developing DC Bias...
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... 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 CANON INC. 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 the original. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The AE mechanism enables production of copies free of...
... 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 CANON INC. 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 the original. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) The AE mechanism enables production of copies free of...
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CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-21 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 lamp in Direct and Reduce mode B: Position of... moves as detected by the lens shift detecting shaft. Operations To blank out the non-image area in Reduce mode Figure 4-122 COPYRIGHT © 1999 CANON INC. Controlling the Side Blanking Mechanism 1.
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-21 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 lamp in Direct and Reduce mode B: Position of... moves as detected by the lens shift detecting shaft. Operations To blank out the non-image area in Reduce mode Figure 4-122 COPYRIGHT © 1999 CANON INC. Controlling the Side Blanking Mechanism 1.