Canon NP6412 Service Manual page 328

CHAPTER 11 TROUBLESHOOTING
2. Adjusting the Intensity of the Scanning Lamp
You must perform this adjustment whenever you have replaced any of the following:
• DC controller PCB
• Composite power supply PCB (See p. 11-41.)
• Scanning lamp
Caution:
If you have performed this adjustment, be sure to perform AE adjustment.
Making Adjustments
• If you have replaced the DC controller PCB or the composite power supply PCB,
1) Select '38' in service mode.
• The display will indicate '38'.
2) Press the Copy Start key.
• The existing setting will flash.
3) Enter the value recorded on the service label using the +/- key.
4) Press the AE key to store the new setting.
• If you have replaced the scanning lamp,
1) Set the Density correction dial (VR107) to the middle.
2) Turn off the AE mechanism, and set the Copy Density Adjustment lever on the control panel to
the middle.
3) Place the Test Sheet on the copyboard.
4) Select '38' in service mode.
• The display will indicate '38'.
5) Press the Copy Start key.
• The existing setting will flash.
11-42
COPYRIGHT © 1999 CANON INC.
Figure 11-261
CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)