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CHAPTER 11 TROUBLESHOOTING
8.
Ratio Fine Adjustment (LENS_ADJ)
Perform this adjustment whenever you have replaced the following:
• DC controller PCB
Making Adjustments
• When you have adjusted the DC controller PCB,
1) Select '36' in service mode.
• The display will indicate '36'.
2) Press the Copy Start key.
• The existing setting will flash.
3) Enter the value of 'LENS_ADJ' indicated on the service label using the +/- key.
4) Press the AE key to store the new value.
9.
Pre-Exposure Lamp Output Adjustment (PREX_LP)
Perform this adjustment whenever you have replaced any of the following:
• DC controller PCB
• Pre-exposure lamp
Making Adjustments
• If you have replaced the DC controller PCB,
1) Select '37' in service mode.
• The display will indicate '37'.
2) Press the Copy Start key.
• The existing setting will flash.
3) Enter the value of 'PREX_LP' recorded on the service label using the +/- key.
4) Press the AE key to store the new value.
5) Execute 'U7' in user mode (installation/drum replacement mode).
• If you have replaced the pre-exposure lamp,
1) Select '37' in service mode.
• The display will indicate '37'.
2) Press the Copy Start key.
• The existing setting will flash.
3) Enter the value of 'PREX_LP' recorded on the label attached to the new pre-exposure lamp
using the +/- key.
4) Press the AE key to store the new value.
5) Execute 'U7' in user mode (installation/drum replacement mode).
11-50
COPYRIGHT © 1999 CANON INC.
CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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Troubleshooting
