Canon LBP-2000 Service Manual download pdf (Page 5)

P - 3

PREFACE

CHAPTER 4 TROUBLESHOOTING

APPENDIX

CHAPTER 3 MECHANICAL SYSTEM

I. EXTERNALS AND CONTROLS .... 3 - 1

A. External Covers...................... 3 - 1

B. Heat Discharging Fan .......... 3 - 4

C. Door Switch Assembly......... 3 - 5

II. PCBS ..................................................... 3 - 8

A. Arrangement of the PCBs... 3-8

B. Video Controller PCB ........... 3 - 8

C. DC Controller PCB................. 3-12

D. Power Supply PCB

Assembly ................................... 3-14

III. DRIVE MECHANISMS .................... 3-15

A. Main Motor ............................... 3-15

B. Drive Assembly ....................... 3-16

IV. FEEDING MECHANISMS............... 3-17

A. Cassette Pickup

Assembly ................................... 3-17

B. Multifeeder Tray Pickup

Assembly ................................... 3-20

C. Registration Roller

Assembly ................................... 3-23

V. EXPOSURE MECHANISMS........... 3-25

A. Laser/Scanner Assembly.... 3-25

VI. CHARGING/DEVELOPING/

CLEANING MECHANISMS ............ 3-26

A. EP-65 Cartridge ...................... 3-26

B. Transfer Charging Roller .... 3-26

VII. FIXING SYSTEM............................... 3-27

A. Fixing Assembly ..................... 3-27

VIII.PAPER FEEDER ............................... 3-34

A. External Covers...................... 3-34

B. Pickup Assembly.................... 3-34

C. Drive Mechanism ................... 3-38

D. PCBs ............................................ 3-39

I. INTRODUCTION ............................... 4 - 1

A. Troubleshooting Flow

Chart ........................................... 4 - 1

B. Making Initial Checks.......... 4 - 4

C. Test Print .................................. 4 - 5

II. TROUBLESHOOTING IMAGE

FAULTS ................................................ 4-10

III. MEASURES AGAINST JAMS ....... 4-17

IV. FEEDING FAULTS............................ 4-21

V. MALFUNCTIONS ............................... 4-23

VI. CORRECTING A FAULT STATUS

CONDITION ........................................ 4-25

VII. STANDARDS AND

ADJUSTMENTS................................. 4-31

A. Making Mechanical

Adjustments............................. 4-31

B. Making Electrical

Adjustments............................. 4-32

C. Copying the Counter

Readings.................................... 4-33

D. Variable Resistors (VR), Light-

Emitting Diodes (LED), Check

Pins, Jumpers, and Switches by

PCB .............................................. 4-34

VIII.MAINTENANCE AND

INSPECTION ...................................... 4-38

A. Periodically Replaced

Parts ............................................ 4-38

B. Durables..................................... 4-38

C. Scheduled Servicing ............. 4-39

D. Points to Note for

Cleaning..................................... 4-40

E. Standard Tools ........................ 4-41

F. Special Tools............................ 4-42

G. Solvents and Oils ................... 4-42

IX. ARRANGEMENT OF ELECTRICAL

PARTS .................................................. 4-43

A. Switches and Sensors .......... 4-43

B. Clutches, Solenoids, and

Motors ........................................ 4-45

C. Others......................................... 4-47

D. PCBs ............................................ 4-48

E. Connectors ............................... 4-50

I. GENERAL TIMING CHART........... A-1

II. GENERAL CIRCUIT DIAGRAM ... A-3

III. LIST OF SIGNALS ............................ A-5

A. Inputs to and Outputs from

the DC Controller PCB......... A-5

B. Inputs to and Outputs from

the Paper Feeder

Controller PCB ........................ A-9

IV. MESSAGES TABLE .......................... A-10

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