Canon imageRUNNER ADVANCE C2020, Service Handbook

Page: 42 / 292

CHAPTER 3 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS
3-6R
1 Variable Resistors, Light-Emitting Diodes, and
Check Pins by PCB
Of the variable resistors (VR), light-emitting diodes (LED), and check pins used in the
machine, those that are used in the field are discussed.
The VRs and check pins not listed are for use at the factory. Do not touch
them in the field, as they require special tools and high accuracy.
1. Some LEDs hold leakage current, and emit dim light even when off;
this 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 in the field.
a. Reader Controller PCB
F03-100-01
A1
B8 A8
B1
2
1
42
41 40
39
80
79
A33 A34 B33 B34
A1 A2 B1 B2
A33 A34 B33 B34
A1 A2 B1 B2
A1
B15 A15
B1
A1
B12 A12
B1
A1
B11 A11
B1
J1605
J1602
J1601
J1605 J1608 J1609
J1608
J1611
J1614
J1617
J1702 J1701
J1603
6 1
1 9
17
13
1
51
1 72
SW1602
VR1
1 2
LED1605
LED1604
LED1603
LED1602
LED1601
ON