Canon iR8500 Service Manual page 720

EGGN-POS
Use it to execute auto adjustment for the edge gain correction position for
the CCD (The CCD edge gain correction mechanism is effective only when
an ADF is in use).
<Using the Mode>
1) Open the ADF (copyboard cover; be sure to do so).
2) Select the item, and press the OK key.
3) Wait until auto adjustment ends (about 1 sec).
4) See that auto adjustment ends automatically and the results (OK/NG)
• If NG is indicated, check the following, and execute adjustment once
a. Is the ADF (copyboard cover) open?
b. Is the reading glass mounted correctly?
c. Is the edge gain correcting plate attached to the reading glass normal?
d. Is the scanning lamp on?
5) When the following has been updated, enter the new
COPYRIGHT© 2001 CANON INC.
• If the CCD unit has been replaced, be sure to execute the following
in advance: COPIER>FUNCTION>CCD>CCD-ADJ.
• If the CCD unit, No. 1 mirror mount, or No. 2 mirror mount has
been replaced, execute this mode.
are indicated.
settings:
COPIER>ADJUST>CCD-EGGN-ST and -EGGN-END.
Reading
glass
2000 2000 2000 2000
Edge gain correction plate
Copyboard
glass
(front)
F00-204-06
CANON iR8500/7200 REV.1 AUG. 2001
SERVICE MODE
COPIER>FUNCTION
S-77