Canon PC400 Service Manual page 261

6) While keeping the condition in step 5), switch the copier ON.
• '0' is displayed, the scanning lamp goes ON, and the main motor starts to rotate.
7) Stop shorting the jumper wires.
8) Set the digital multimeter to the 20V DC range, and turn VR602 (AE offset
adjustment) until the voltage between the anode side of the diode (D606; +) and
JP607 (GND) is 4.0 ±0.1 V.
Notes:
You must use a Digital Multimeter when making adjustments in steps 8) and 10).
JP607
Control panel PCB
Figure 2-4B
VR602 VR603
D606 (anode side)
Figure 2-5B
CHAPTER 2 STANDARDS AND ADJUSTMENTS
JP605 JP604
Screwdriver
JP607
Control panel PCB
2-5