Canon CLC 1130, Service Manual

Page: 920 / 965

COPYRIGHT © 2002 CANON INC. CANON CLC1100/1130/1150/1160/1180 REV.1 JAN. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
13-331
CHAPTER 13 TROUBLESHOOTING
Code Cause
• The fixing motor (M5) is faulty.
• The fixing motor drive system is
subjected to an overload.
• The DC driver PCB is faulty.
• The CPU PCB is faulty.
• The cleaning blade reciprocating
motor (M7) is faulty.
• The DC driver PCB is faulty.
• The CPU PCB is faulty.
• The duplexing motor (M14) is
faulty.
• The DC driver PCB is faulty.
• The CPU PCB is faulty.
The discussions that follow are
compiled according to detail code.
• The toner concentration sensor is
faulty.
• The developer inside the
developing assembly is not stirred
properly.
• The sensor is subjected to stray
light (no cover, front cover open).
• The photosensitive drum has
deteriorated.
Timing of detection
0000 The motor lock signal
(FXMLK) is '0' for 1 sec or
more while the fixing motor is
rotating.
The cleaning blade reciprocating
motor driver circuit on the DC driver
PCB has detected an overcurrent for
0.1 sec or more.
The duplexing motor clock signal
(DUPMLK) is '0' for 1 sec or more
while the duplexing motor is
rotating.
Toner Concentration Fault
xx indicates the color of a developing
assembly.
xx=00: MCYBk in common
xx=01: M
xx=02; C
xx=03: Y
xx=04: Bk
The notations used herein means the
following:
SGNL: toner concentration signal
REF: concentration signal
DENS: developer concentration
inside developing assembly
SIGG: gain value for concentration
reference signal
PT-REF: concentration reference
signal for photosensitive drum
surface
PT-STG-D: reflection light intensity
signal for photosensitive drum
surface
xx00 The connector is disconnected
or there is an open circuit; the
REF or SGNL level is '50' or
less
xx12 At time of setting initial data
(as during installation), the
variation of SGNL-M/C/Y
levels for ten concentration
data samplings is '70' or more.
E016
E017
E020
E014