Optical Section Malfunction - Minolta EP1080 Service Manual

12-8. OPTICAL SECTION MALFUNCTION

A defective Exposure Lamp LA1 (C0400, C0410) is detected under any of
the following timings:
C0400: Exposure Lamp's Failure to Turn ON
The output from AE Sensor Board
PWB-H does not drop to 4.3V or lower
for the period from when LA1 turns ON
and the Scanners start a scan motion to
when an Image Leading Edge signal is
output.
C0410: Exposure Lamp Turning ON at Abnormal Timing
The PWB-H output remains 4.1V or
lower for 1 second or longer while the
output from Scanner Reference Position
Sensor PC81 remains LOW.
The PWB-H output remains 4.1V or
lower for 1 second or longer while Size
Reset Switch S108 remains actuated
(HIGH) (except while the Scanners are in
motion).
A defective Scanner Motor M5 (C0600) is detected under any of the
following timings:
The output from Scanner Reference
Position Sensor PC81 does not go LOW
within approx. 15 seconds after M5 has
been energized (for Scanner's return
motion).
The output from PC81 does not go HIGH
within approx. 5 seconds after M5 has
been energized (for Scanner's scan
motion).
The output from PC81 does not go LOW
within 20 seconds after it has gone HIGH.
LA1
Image Leading Edge
PWB-H
PC81
output voltage
PWB-H
1sec
S108
output voltage
PWB-H
1sec
M5
about 15sec
PC81
M5
about 5sec
PC81
about 5sec
PC81
M-44
output voltage
1139T18MCA
1139T19MCA
1139T20MCA
1139T21MCA
1139T22MCA
1139T23MCA