Switches On Pcbs - Canon LBP-1000 Service Manual

CHAPTER 4
C. Variable Resistors, LEDs, Test Pins, Jumpers and Switches on PCBs
Only the variable resistors, LEDs, test pins, jumpers, and switches required for after-sales ser-
vice in the field are listed below.
All other variable resistors, test pins, etc. are for the factory use only. The adjustment and
check using these test pins, etc. require special tools, measuring instruments and high preci-
sion. Do not touch them in the field.
Notes: 1. Some LEDs receive leakage current during normal operation, thus glow dimly even
when they should be OFF.
2. Variable resistor which may be adjusted in the field are marked .........
Variable resistor which may not be adjusted in the field are marked ...
1. Engine controller PCB
VR601
1
SW701
2
1
J301
5
2
J303
1
4 - 28
J601
SW201
4
1 J201 J505
JP221
2 3
JP221
Figure 4-7-2
2 1
27 1
6
J403
2
26
J402
J401
J501 J504 J502
JP101 JP103
JP102 JP104
J405 J701
1 2 1 2 1 3 1
J404
J503
JP105
JP106