Canon PC921 - Variable Resistors (VR) and Check Pins by PCB; DC Controller Pcb; Composite Power Supply Pcb

CHAPTER 3 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS
3-6
F. Variable Resistors (VR) and Check Pins by PCB
Of the variable resistors (VR) and check pins, those needed in the field are discussed herein.
Those not found in the discussions are for the factory only, requiring special tools and adjustment
to an extremely accuracy. Do not touch them in the field.
Caution:
VRs that may be used in the field ................
VRs that must not be used in the field .........
1. DC Controller PCB
Figure 3-6
2. Composite Power Supply PCB
Figure 3-7
J130
J114
J102
J111
J201
J111
J108
3
1
2
1
2
81 91
JP102 JP101
1
6
1
7
1
19
18
2
5
315121
6
SW101
J113J132J106
J109
1
J105
J104
6
71
J103J107
J101
J131
8114
111
VR104
VR106
VR105
VR107
VR103 VR102
CP23 GND
1
1
2
JP104 JP103
J201
J207
2
1
21
21
FU102
J910
VR001
J205 1
4
J202
16
J213
J212
J209
J302
VR301
VR801
J203
J204
1
8
1
7