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GJ OPERATIONS AND TIMING a
2.
Adjusting the Intensity of the
Seanning Lamp
Adjust the intensity of the scanning lamp
whenever you have replaced any of the fol-
lowing parts:
* DC controller PCB
* composite power supply PCB
* AE/intensity sensor PCB
¢ scanning lamp
1) Set the density correction dial (VR107)
to the center notch.
VR107
Figure 3-801
2) Turn off the AE mechanism, and set the
copy density adjusting lever to the cen-
ter notch.
3)
Place the Test Chart (NB-3, NA-2, NA-3)
on the copyboard, and make copies.
4) Turn VR101
on the DC controller PCB
fully counterclockwise.
5) Turn VR101
on the DC controller PCB
so that gray scale No. 9 is barely visible.
Check gray scale No. 10 if you are
using NB-3.
If you have turned VR101 fully clock-
wise, turn it fully counterclockwise
before making adjustments once again.
3-84
COPYRIGHT © 1995 CANON INC.
Direction of VR101 and Cop
Clockwise
Counterclockwise
Seka
=o]
Figure 3-802
3.
AE Adjustment
Execute AE adjustment whenever you
have replaced any of the following parts:
* DC controller PCB
* Composite power supply PCB
* AE/intensity sensor PCB
¢ scanning lamp
Preparing for Adjustment
* Obtain a newspaper with even density;
avoid one with photos and large titles.
* Obtain five sheets of copy paper.
* Make sure that the intensity of the
scanning lamp has been properly
adjusted.
CANON NP6O12/NP6O'2F /NP6212 REV.1 SEPT. 1985 PRINTED INJAPAN (IMPRIME
AU JAPON)
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