Canon NP2120 Service Manual page 100

A. Outline
The service modes are available foruse in adjust-
ing and checking some of the sensors and loads and
can be activated by pressing the service switch
(SWI) on the adjustment PCB. See the table below
fordescriptionson each of the seven service modes.
Service
mode No.
The scanner movesforward to the pointof AE Use it to adjust the AE referente point; for
0
measurement, and the scanning lamp goes details, see p. 3-34.
indicated on the copy counter on the control
panel.
EX. 1561.5V
The read-involtage of VR2 (AEslope adjust- UseittoadjusttheAEslope;fordetails,
1
ment) is indicated on the copy counteron the
control panel.
EX. 22 0 2.2V
The powerfrequencydata is indicated on the The copier uses an AC motor; the variation
2
EX. -05 Q 59.5Hz
The pre-exposure lamp and main motor are Use it to check the operation of the lamp
3
4
The output voltage of 'document size 0' is Ifanyofthefollowing istrue.anerrorshould
5
indicated on the copy counter on the control be suspected; replace the document size
panel.
EX. 180 1.8V
The output voltage of 'document size 1' is
6
indicated on the copy counter on the control
panel.
EX. 18 0 1.8V
The output voltage of 'document size 2' is
7
indicated on the copy counter on the control
panel.
EX. 18 9 1.8V
Description
CANON NPZl20/2MD RN.1 JAN. 1992 PRINlED IN JAPAN IIMPRIML AU JAPONI d
sionlcontraction of the image; use it to
and motor.
Use it to check the LEDs.
detection mechanism (no adjustment is
possible in the field).
. The value indicated with the copyboard
3-55