COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10TROUBLESHOOTING
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