Canon PS-7000, Service Manual

Page: 31 / 67

Chapter 3 Troubleshooting
3-8
Remove the Network Board, and
measure the resistance at C2 on
the Main Board. *1
Correct?
Correct?
Yes
No
Yes
No
B
Check coating of the
Power Cord at the
secondary side.
Good?
Yes
Remove the DC Fan, and measure
the resistance at C2 on the Main
Board. *1
Replace the Network Board.
Replace the Power Cord at the
secondary side.
Replace the DC Fan.
Correct?
Yes
No
Remove the Power Cord from the
secondary side, and measure the
resistance at C2 on the Main
Board. *1
Replace the Power Supply board
assy.
Replace the Main Board. *3
To Start of Troubleshooting.
No
*1: The correct resistance at C2 is 40 to 50-ohm.
*2: Measure the resistance between VCC (12 pin) and GND (5 pin). The correct resistance is 1M-ohm or more.
*3: Be sure to use the EEPROM from the original Main Board on the replaced new Main Board.
(See page 1-5 for details.)