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COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
2
Shading Auto Correction
• There are two types of shading auto cor-
rection: for servicing and for factory/R&D.
(3rd screen in *4*)
• In shading auto correction, various data
items are measured, and the results are
stored in RAM on the image processor
PCB. (The stored data will be used as tar-
get value for shading correction executed
before copying operation.)
• Use this mode for the following:
• When replacing the image processor PCB
• After executing ‘RAM INIT’ in service mode
(*4*)
• Before executing ‘copy auto density correc-
tion’ in service mode (*4*)
• After replacing the composite power supply
PCB
• After replacing the laser unit
• After replacing the CCD unit
• After replacing the analog processor PCB
■
■
Work
1) Open the front door, and insert the handle of
the separation static eliminator cleaning brush
into the fixing assembly releasing opening.
Figure 3-1006
2) Insert the door switch actuator into the door
switch assembly.
3) Push the service switch with a hex key.
• ‘$’ will be indicated in the upper left corner
of the LCD.
4) Press the * key twice.
• The Service Mode Menu screen will
appear.
Figure 3-1007
5) Press ‘FUCNTION’ (*4*) on the Menu screen
to highlight; then, press the OK key.
6) Press the Page key to bring up the
Shading screen (3rd screen).
Figure 3-1008
7) Press ‘AUTO SHADING’ on the LCD to high-
light; then, press the OK key.
• ‘shading auto correction’ will be executed.
8) In a while, ‘Now [END]’ will appear on the
screen to indicate the end of shading correc-
tion.
CANCEL
+
OK
–
*3* FUNCTION 03
AUTO SHEADING START (OK)
WB
GDA1
CDA4
D-ODD
H WP
H GD2
H ADDA5
H D-EVN
H LAMP H
H CDA3 H
H
H
Now [ ]
1 DISPLAY
2 I/O DISPLAY
3 ADJUST
4 FUNCTION
5 OPTION
6 COUNTER
7 ACC
8 FAX
CANCEL
+
OK
<SERVICE MODE>
* *
* *
* *
* *
* *
* *
* *
* *
–
1
2
Separation static eliminator cleaning brush
3. OPERATIONS AND TIMING
