CHAPTER 10 TROUBLESHOOTING
COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-17
B.
Electrical
1.
List of PCBs/VRs/LEDs/Check Pins
Variable resistors, LEDs and check pins which are used for adjustments in the field are listed
below.
VRs and check pins not listed here are used only for factory adjustments, which require special
tools and measuring instruments, as well great care and precision. Do not attempt to adjust such
parts.
Notes:
1. Leakage current may flow through some LEDs and cause them to glow dimly even though
they are supposed to be OFF.
2. VRs which can be adjusted in the field ................ .
VRs which should not be adjusted in the field ...... .
a.
DC Controller PCB
Figure 10-221
Table 10-202
Table 10-203
SW No
SW300
Purpose
Press to enter or leave the SERVICE mode.
VR No
VR301
Purpose
Adjusting AE refence point
J315
20
11
11
0
3
1
J352
J318
8
1
J300
1
6
J302
61
J316
11
1
J305
81
J304
J303
5
1
J301
41
1
9
J307
81
J306
71
J312
1
13
J311
1
10
J309
1
2
J308
1
2
J310
1
3
J313
1
5
J314
1
5
J317
14
SW300
VR301
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