COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
13-177
CHAPTER 13 TROUBLESHOOTING
I.
Variable Resistors (VR), Light-Emitting Diodes (LED), and
Check Pins by PCB
Of the variable resistors (VR), light-emitting diodes (LED), and check pins used in the copier,
those that may be used in the field are discussed.
Caution:
1. Some LEDs emit light even when off because of leakage current. It is a normal condition,
and must be kept in mind.
2. VRs that may be used in the field:
VRs that must not be used it the field:
3. The VRs and check pins that are not found in the tables are for the factory only, and require
special tools and high accuracy. Do NOT touch them in the field.
1. DC Driver PCB
Figure 13-614
LED: turns on when +24 V is supplied, and turns off when the front cover is opened.
SW1-1
OFF
ON
OFF
ON
SW1-2
OFF
OFF
ON
ON
Remarks
Normal area
Highland 1
Highland 2
OUT
Normal
Case 1
Case 2
Not used
Table 13-614
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