Variable Resistors (Vr), Light-Emitting Diodes (Led), And Check Pins By Pcb; Dc Driver Pcb - Canon CLC 1120 Service Manual

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

LED: turns on when +24 V is supplied, and turns off when the front cover is opened.
OFF
ON
OFF
ON
COPYRIGHT © 1999 CANON INC.
Figure 13-614
SW1-1 SW1-2
OFF
OFF
ON
ON
Table 13-614
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
OUT Remarks
Normal Normal area
Case 1 Highland 1
Case 2 Highland 2
Not used
13-177