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Cpu Pcb; Ip Main Pcb - Canon CLC 1120 Service Handbook

Color laser copier.
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CHAPTER 3 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS
Caution:
If the copier is used in highlands (low atmospheric pressure), images may suffer from transfer
faults. Try changing the setting of the DIP switch (SW1) to highland 1, and see if the problem
is corrected; if the problem still occurs, switch SW1 to highland 2.
If the problem still remains thereafter, shift SW1 back to its normal setting, and try to check
other possible causes.

2. CPU PCB

LED1: turns on when +5 V is supplied.
LED2: turns on when +24 V is supplied.
3.

IP main PCB

3-18
B15
B1
B9
B1
B14
B2
B8
B2
J2002
J2003
1
4
A1
A15
A1
A9
J2001
A2
A14
A2
A8
A15
A1
J30
A1
A15
A49
A1
A50
A2
J2012
B50
B2
B49
B1
J214
B1
B39
B1
B2
B40
B2
A1
A39
A1
A2
A40
A2
52
51
100
J216
99
50
2
49
1
2
14
2
14
J217
J218
1
15
1
15
J211
32
1
32
B10
B2
B20
B2
B9
B1
B19
B1
J2005
J2004
A1
A9
A1
A19
A2
A10
A2
A20
1
5 1 4 1
J9 J6
B34
B33
J24
A34
A33
VR1
B34
B33
LED1
A34
A33
LED2
2
8
J2010
1
9
J2011
1
7
Figure 3-15
J215
B49
B50
A49
A50
J212
1
32
Figure 3-16
B17
B1
B16
B2
J2006
A1
A17
A2
A16
6
B2
J2
B1
A2
A1
B2
B1
J25
A2
A1
A30
A2
A29
A1
J2009
B30
B2
B29
B1
J213
1

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