Technical information

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
5-55
b.When Replacing the Reader Controller PCB
1) Initialize the RAM on the reader controller PCB. (See the appropriate instructions.)
2) Turn off and on the power switch.
c.When Replacing the DC Controller PCB
1) Start service mode, and check to make sure that ‘DISP > BLT-DRFT > BELT-POS’ is
‘CENTER’; if not, move the transfer belt to the center.
2) Turn off the power switch.
3) Disconnect the power plug from the power outlet.
Be sure to disconnect the power plug from the power outlet. Merely turn-
ing off the power switch will not cut the power.
4) Replace the DC controller PCB.
5) Turn on the power switch.
6) Initialize the RAM on the DC controller PCB. (See the appropriate instructions.)
7) Turn on and then off the power switch.
d. Initializing the RAM on the DC controller PCB
1) Record the setting of ‘OFFSET-C/M/Y/K’ found in the second row of page 2 on the
EPC screen of ‘FUCNT’ in service mode.
2) Start service mode, and check to make sure that ‘BELT-POS’ of ‘BLT-DRFT’ under
‘DISP’ is ‘CENTER’; if not, move the transfer belt to the center.
3) Execute ‘FUNC>DC-CON>RAM-LR’ in service mode.
4) Turn off the power switch, and disconnect and then connect the power plug (so that the
RAM will be cleared).
5) Turn on the power switch.
6) If you have replaced the DC controller PCB, replace the developer according to the in-
structions on 2.5.1 Replacing the Developer.
7) Enter the value of A recorded on the service label. (If you have changed other service
mode settings related to the DC controller, enter such settings as well.)
8) Execute ‘REG-APER’ of ‘INSTALL2’ under ‘FUNC’ in service mode.
9) Enter the setting of ‘OFFSET- C/M/Y/K’ recorded in step 1) to the following:
‘FUNC>DC-CON>POTOFST-C/M/Y/K’.