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COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10
TROUBLESHOOTING
This chapter provides tables of maintenance/inspection, standards/adjustments, and identification of
problems (image fault/malfunction).
A. Sensors and Switches ................... 10-70
B. Motors, Fans, Clutches,
and Solenoids................................. 10-72
C. Heaters, Lamps, and Others .......... 10-74
D. PCBs .............................................. 10-76
E. Variable Resistors, Light-Emitting
Diodes, and Check Pins by PCB ... 10-77
VII. SERVICE MODE .................................. 10-82
A. Outline ............................................ 10-82
B. Using Service Mode ....................... 10-82
C. Using Adjust Mode and
Function Mode................................ 10-83
D. Display Mode [1] ............................ 10-84
E. I/O Display Mode [2]....................... 10-88
F. Adjust Mode [3] .............................. 10-92
G. Function Mode [4] .......................... 10-94
H. Option Mode [5] .............................. 10-95
I. Counter Mode [6] ........................... 10-97
J. Application Mode [7]....................... 10-98
VIII. SELF DIAGNOSIS .............................. 10-99
A. Copier ............................................. 10-99
B. ADF .............................................. 10-103
C. Sorter ............................................ 10-104
D. Cassette Feeding Module ............ 10-104
I. GUIDE TO TROUBLESHOOTING
TABLES .................................................. 10-1
A. Image Adjustment Basic Procedure 10-3
B. Points to Note for Scheduled Servicing . 10-4
II. STANDARDS AND ADJUSTMENTS .... 10-5
A. Mechanical ....................................... 10-5
B. Exposure System ............................. 10-7
C. Image Formation System ............... 10-10
D. Pick-Up/Feeding System ............... 10-14
E. Fixing System ................................. 10-16
F. Electrical System ............................ 10-18
III. IMAGE FAULTS ................................... 10-25
A. Initial Checks .................................. 10-25
B. Image Fault Samples ..................... 10-28
C. Troubleshooting Image Faults ....... 10-29
IV. TROUBLESHOOTING
MALFUNCTIONS ................................. 10-42
A. Copier ............................................. 10-42
V. TROUBLESHOOTING FEEDING
PROBLEMS.......................................... 10-66
A. Copy Jams ..................................... 10-66
B. Faulty Feeding................................ 10-69
VI. ARRANGEMENT AND FUNCTIONS
OF ELECTRICAL PARTS .................... 10-70