User Guide

CHAPTER 11 TROUBLESHOOTING
COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-44
3. AE Adjustment
Perform this adjustment if you have replaced any of the following:
• DC controller PCB
• Composite power supply PCB (See p.11-41)
• AE sensor PCB
• Scanning lamp
Making Adjustments
Preparatory Work
• Obtain a newspaper which is more or less even in density. (Avoid ones with photos or large
text characters.)
• Obtain five sheets of white sheets of paper
• Make sure that the intensity of the scanning lamp has been adjusted when you have replaced
the scanning lamp.
• Set the density correction dial (VR107) to the middle setting.
1) Select '40' in service mode.
• The display will indicate '40'.
2) Press the Copy Start key.
• The scanner will move forward, and the scanning lamp will turn on.
3) Turn VR103 on the DC controller PCB fully clockwise.
Figure 11-262
AE GAIN
VR103
J131
J101
J130
VR102
AE
REF
J107
J103
J104
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