Canon DADF-Q1 Service Manual - page 144
Chapter 4
4-34
4.5.3 PCBs
0011-7883
F-4-155
T-4-29
4.6 Variable Resistors (VR), Light-Emitting Diodes (LED), and Check Pins by PCB
4.6.1 Outline
0011-7884
Of the LEDs and check pins found in the machine, those used in the field are discussed:
Do not touch any check pins that are not indicated in the table. They are for the factory, and require special tools and high precision.
4.6.2 ADF Controller PCB
0011-7886
Some LEDs emit light when they are off because of leakage current. This is a normal condition, and must be kept in mind.
Arrangement of Components
F-4-156
4.6.3 DIP Switch Functions
0011-7887
The DIP switch (SW1) on the ADF controller PCB provides the following functions according to how it is set:
Fan
FM1
Belt motor cooling fan
Reference
Name
1
ADF controller PCB
2
Reversal motor driver PCB
3
Belt motor driver PCB
4
Pickup tray PCB
5
Indication LED PCB
Name
Notation
Description
1
2
3
4
5
J1
J2
J5
J3
J6
J7
J8
J9
J10
J16
J15
J11
J14
IC8
J13
J12
J4
CB1
SW1
DSP1
SW4SW3SW2