Canon CP660 Service Manual page 284

CHAPTER 10 TROUBLESHOOTING
• With the Reader Unit Installed
1) Perform the steps under VIII.C.4. "Removing the DC Controller PCB" in Chapter 4 to
remove the DC controller PCB.
2) Mount the new DC controller PCB.
3) Put back the parts that have been removed. (However, it is better not to mount the
rear cover of the printer unit until after checking to see that the copier operates nor-
mally.)
4) Connect the power plug to the power outlet, and turn on the reader unit rear power
switch and the control panel power soft switch in the order indicated.
5) Operating on the control panel of the reader unit, select COPIER>FUNCTION>MISC-
P>DC-LOAD to highlight; then, press the OK key.
6) End service mode, and turn off and then on the control panel power soft switch to load
the data backed up on the reader controller PCB to the DC controller PCB (all items
of ADJUST>IMG-REG, FEED-ADJ, HV-TR).
7) Check to make sure that settings are indicated under ADJUST>IMG-REG, FEED-
ADJ, HV-TR; if not, perform the steps starting with step 5). If settings are still absent,
enter the value recorded on the service label attached to the printer unit for
ADJUST>IMG-REG, FEED-ADJ, and enter the standard value for ADJUST>HV-TR.
8) Execute auto gradation correction in user mode.
9) End.
10-2
COPYRIGHT © 1999 CANON INC.
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CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)