Canon GP405 Service Manual page 610

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CHAPTER 14 TROUBLESHOOTING

Executes shading auto correction.

Execute this mode after replacing the CCD PCB,

scanning lamp, DC controller PB, image processor PCB,

or standard white plate.

The VR on the DC controller PCB must be turned during

execution; be sure to remove the rear cover and locate the

VR on the DC controller PCB in advance.

During adjustment, SERVICE will be indicated in the

upper right corner of the screen.

1) Place five or more sheets of standard white paper on the

2) Select <MAN-ADJ> to highlight; then, press the OK key.

3) Check that the machine starts auto adjustment mode,

4) When a beep is heard while VOL is indicated, press the

5) Check that the screen indicates the following after

* The whitest of all used by the user (except paper for a color copier).

cupboard glass.

and the screen indicates the following:

AD -> CLANP -> VOL

OK key on the screen.

If no beep is heard in several seconds, turn VR200 on

the DC controller PCB so that a beep is heard; then,

press the OK key.

VOL-OK; at the end, it indicates END.

GAIN → CLANP2 → DARK → SHADING

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