Canon PS-7000 Service Manual page 31

B
Remove the Network Board, and
measure the resistance at C2 on
the Main Board. *1
Correct?
No
Remove the DC Fan, and measure
the resistance at C2 on the Main
Board. *1
Correct?
No
Remove the Power Cord from the
secondary side, and measure the
resistance at C2 on the Main
Board. *1
Correct?
No
Replace the Main Board. *3
*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.)
Yes
Replace the Network Board.
Yes
Replace the DC Fan.
Yes
Check coating of the
Power Cord at the
secondary side.
Good?
No
Replace the Power Cord at the
secondary side.
To Start of Troubleshooting.
3-8
Chapter 3 Troubleshooting
Yes
Replace the Power Supply board
assy.