Removing The Dc Controller Pcb - Canon imageRUNNER ADVANCE C5255 Series Service Manual

4
Parts Replacement and Cleaning > Main Controller > Removing the DC Controller PCB > Procedure
2-2) Avoid the harness and open the Controller Box and the FAX Unit.
• 3 screws
x3
CAUTION:
Close the Controller Box while pressing the cable with afinger. Check that the cable is
stored when closeing the box.
4 Parts Replacement and Cleaning > Main Controller > Removing the DC Controller PCB > Procedure
■ Actions before Replacement
When replacing the DC Controller PCB, execute the following Service Mode to backup the
DC Controller PCB SRAM.
Execute COPIER > FUNCTION > SYSTEM > DSRAMBUP (LEVEL2).
After "ACTIVE" is displayed for approx. 2 minutes, "OK!" is displayed.
After the above execution is completed, turn OFF the main power supply.
■ Preparations
1) Open the Right Lower Cover and Right Upper Cover.(Refer to page 4-84)
2) Remove the Right Rear Cover.
F-4-76
3) Remove the Left Rear Cover and the Left Rear Sub Cover.(Refer to page 4-86)
4) Remove the Rear Cover.(Refer to page 4-89)
5) Open the Controller Box.(Refer to page 4-89)
■ Procedure
1) Remove the DC Controller PCB
Cable
• 22 connectors
• 7 screws
F-4-77

Removing the DC Controller PCB

DC Controller PCB
x22
x7
4-90
Connectors
F-4-78
4-90