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CHAPTER 14 TROUBLESHOOTING
14-24
COPYRIGHT © 1999 CANON INC.
CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
3
Copy Density Auto Correction
n
Execute copy density auto correction for the following:
The copy image is not proper (image fault).
The laser unit has been replaced.
The image processor has been replaced.
The composite power supply PCB has been replaced.
n
When executing copy density auto correction, be sure to execute the following three types (five
items) as a set. Be sure to execute shading correction before executing density correction.
•
Standard white paper density read
FUNCTION>DENS>WHITE-ME
•
PD density auto correction
FUNCTION>DENS>PD-DENS
(text, text/photo mode)
FUNCTION>DENS>PD-ME
•
DZ density auto correction
FUNCTION>DENS>DZ-DENS
(photo mode)
FUNCTION>DENS>DZ-ME
n
The following blocks are subjected to correction processing:
Laser characteristic correction
Developing bias correction
n
Executing the Mode
a.
Executing Shading Correction
1) Start service mode.
2) Select COPIER>FUNCTION>CCD in sequence; then, select <CCD-ADJ>.
3) Press the OK key. (You need not place standard white paper.)
4) End service mode; then, make two solid black copies while holding the feeder or the copyboard
glass open. Check to make sure that white lines did not occur.
Содержание GP335
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