Canon NP6621 Service Manual page 105

3. AE Adjustment
The machine's AE adjustment may be performed
in service mode, and it consists of the following
three:
Item Function
No. 301 Automatic
adjustment of
lamp intensity
during AE
scanning
No. 302 Reference point
adjustment for the
copy density
(developing bias)
for AE mode
No. 303 Slope adjustment
for the copy
density
(developing bias)
for AE mode
Note:
After AE adjustment with Test Chart NA3, using AE mode, density adjustment should show "5". In non-
AE mode, using NA3, density "5" must be appropriate (adjusted with VR850).
COPYRIGHT © 1998 CANON INC.
Adjustments
9
Light
Copy
density 5
Dark
Test Chart
9
Light
Copy
density 5
Dark
Test Chart
Light 9
Copy
density 5
Dark
Test Chart
Table 3-302
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
OPERATIONS AND TIMING
• automatic adjustment of the lamp intensity during
AE scanning (No. 301)
• reference point adjustment for the copy density
(developing bias) for AE mode (No. 302)
• slope adjustment for the copy density (developing
bias) for AE mode (No. 303)
Automatically adjusted so
that copy density 5 is
attained when the Test
Chart is copied.
Original
density
If the setting is decreased
in service mode, the AE
copy will be darker.
If the setting is increased
in service mode, the AE
copy will be lighter.
Default: 0
Settings:-26 to +26
Original
density
If the setting is increased
in service mode, the
copies of a newspaper
will be light.
If the setting is decreased
in service mode, the
copies of a newspaper
will be darker.
Newspaper Original
Default: 0
density
Settings:-26 to +26
Remarks
3–49