Canon NP6621 Service Handbook page 106

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ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS
H. Variable Resistors (VR) and
Check Pins by PCB
Of the VRs and check pins used in the machine,
those needed in the field when servicing the ma-
chine are discussed herein.
1. DC Controller PCB
J302
1
5 J351 1
SW303
J307
1
14
SW303
ON
ON
ON
ON
6–16
J326
1
6
J325
3
5
J318
1
12
J308
J309
22
12
1
11
1
Figure 6-608
Counter
OFF
Large size copy counter
OFF
Duplexing unit counter
Small size copy counter
OFF
No counter
OFF
Caution:
Do not touch VRs or check pins not mentioned
herein. They are for factory use only and require
special tools and instruments for highly precise
adjustment.
1.
VRs that may be used
in the field.
2.
VRs that must not be
used in the field.
J324
8
1
9
16
1
24 J310 13
15
1
12
1
SW303 settings determine how
the option counter (CNT2)
behaves.
Table 6-607
J321
J320
1
4
1
5
1
4
J322
20 J312 11
J311
J313
8
1
10
1
4
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