Canon NP6621 Service Manual page 186

OPERATIONS AND TIMING
Item Function
No. 301 Automatic lamp
intensity adjustment
for AE scans
No. 302 Copy density (devel-
opment bias) refer-
ence point adjustment
for AE mode
No. 303 Copy density (devel-
opment bias) slope
adjustment for AE
mode
Note: 1. After Adjustment, with test chart NA-3, using AE mode, density adjustment should show '5'.
2. In non-AE mode, using NA-3, density '5' must be appropriate (adjusted with VR850).
3–130
9
Lighter
Copy
density 5
Darker
Test Chart
9
Lighter
Copy
density 5
Darker
Test Chart
9
Lighter
Copy
density 5
Darker
Test Chart
Table 3-801
COPYRIGHT © 1998 CANON INC.
Description
Density of
original
q
w
Density of
original
q
w
News- Density of
paper original
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Remarks
The lamp intensity is
automatically adjusted so
that the copies of the
Test Chart will be made
at density 5.
A lower setting in
service mode causes
the AE copies to be
darker.
A higher settings in
service mode causes
the AE copies to be
lighter.
default: 0
range: –26 to +26
(see Note.)
A higher setting in
service mode causes
copies of a newspa-
per to be lighter.
A lower setting in
service mode causes
copies of a newspa-
per to be darker.
default: 0
range: –26 to +26