Canon NP6012F - Blank Exposure (front) Circuit Diagram

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APPENDIX-

/’ -\

M. BLANK EXPOSURE (front) CIRCUIT DIAGRAM

LA601

COPYRIGHT 8 1995 CANON INC.

CANON NP6012 I NPLOlZFI NP6212 REV.1 SEPT. 1995 PRINTED IN JAPAN (IMPRIM AU JAPON)

A - 31

Table of Contents

Features3
Specifications4
- Copier4
- ADF7
Names of Parts8
- External View8
- Cross section10
Operations11
- Control Panel11
- Basic copying Operations14
- User Mode18
- Removing Jams23
- Adding Paper23
- Replacing Toner Cartridge Indicator and Action to Take24
- Using the Density Correction Dial25
- Using the Scanning Lamp Heater Switch26
- Cleaning26
- Points to Note When Closing the Top Unit30
Image Formation31
- Outline31
- Static Latent Image Formation Block32
- Pre-Exposure (step 1)33
- Primary Charging (step 2)33
- Image Exposure (step 3)34
- Developement (step 4)34
- Transfer (step 5)35
- Separation (step 6)36
- Fixing (step 7)36
- Drum Cleaning (step 8)37
Auxiliary Process38
Basic Operation39
- Functional Construction39
- Electrical Circuitry40
- Inputs to and Outputs from the DC Controller41
- Outputs from the DC Controller43
- Main Motor Control Circuit45
- Basic Sequence of Operations (direct, 2 copies, continuous)46
Exposure System49
- Varying the Reproduction Ratio49
- Lens Drive System51
- Scanner Drive System52
Image Formation System55
- Outline55
- Sequence of Operations (image formation system)56
- Controlling the Pre-Exposure Lamp57
- Controlling the Scanning Lamp58
- Controlling the Primary Charging Roller Bias61
- Controlling the Developing/Separation Static Eliminator Bias64
- Developing Assembly/Cleaning Assembly67
- Controlling the Transfer Roller Bias75
- Measuring the Density of the Original (AE)78
- Controlling the Side Blank Exposure82
Pick-Up/Feeding System83
- Outline83
- Controlling the Pick-Up Roller84
- Controlling the Feeding Mechanism86
- Fixing and Delivery88
- Detecting Jams97
Fan101
Power Supply102
- Distribution of Power102
- Power Supply Circuit103
- Detecting Errors by the Composite Power Supply PCB105
- Protection Mechanism of the of the Power Supply Circuit105
ADF106
- Outline106
- Basic Constructin107
- Basic Operations109
- Detecting an Original111
- Pick-Up Operation112
- Delivery115
- Controlling the Pick-Up Motor117
- Controlling the Belt Motor118
- Detecting Original Jams119
- Power Supply120
Standards and Adjustments121
Service Mode132
- Outline132
- Using Service Mode132
- Adjustments Mode135
- Operation/Inspection Mode136
- Machine Settings Mode137
- Counter Mode137
- Reproduction Ratio Fine Adjustment138
- Pre-Exposure Lamp Output Adjustment138
Self Diagnosis139
Externals143
- External Covers143
- Control Panel145
Drive System147
- Scanner Drive Assembly147
- Lens drive Assembly158
- Main Motor/Main Drive Assembly161
Pick-Up/Feeding System164
- Pick-Up Assembly164
- Multifeeder Assembly167
- Feeding Assembly169
- Registration Roller169
- Delivery Assembly172
Exposure System174
- Illuminating Assembly174
Charging System179
- Drum Unit179
- Transfer Corona Assembly181
Developing Assembly182
- Developing Assembly182
Electrical System192
- DC Controller PCB192
- Composite Power Supply PCB193
ADF194
- Removing the ADF194
- External Covers195
- Drive System196
- Electrical System202
Selecting the Site203
Unpacking and Installation204
- Unpacking and Installation204
- Setting Copy Paper218
Relocating the Copier219
periodically replaced Parts220
Durables and Consumables220
Scheduled Servicing220
Appendix221
- General timing Chart221
- Signals and Abbreviations223
- General Circuit Diagram224
- DC Controller Circuit Diagram226
- ADF Controller Circuit Diagram234
- Composite Power Supply Circuit Diagram237
- Toner Level Detection Circuit Diagram243
- Control Panel Circuit Diagram244
- Intensity/AE Sensor Circuit Diagram245
- Sensor Circuit Diagram246
- Noise Filter Circuit Diagram247
- High Voltage Contact Circuit Diagram248
- Blank Exposure (front) Circuit Diagram249
- Blank Exposure (rear) Circuit Diagram250
- Pre-Exposure Circuit Diagram251
- Special Tools252
- Solvents/Oils253

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