3NV-2
1-4-3
1-4-2 Self-diagnosis
(1) Self-diagnostic function
This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the
problem displayed as a code consisting of C followed by a number, indicating the nature of the problem.
A message is also displayed requesting the user to call for service.
After removing the problem, the self-diagnostic function can be reset by turning safety switches off and back
on.
(2) Self diagnostic codes
Code
Contents
Causes
Check procedures
corrective measures
9000
Document processor communica-
tion error
Communication with the document
processor is not possible.
Defective con-
nector cable or
poor contact in
the connector.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, replace the cable.
DP main PWB (YC1) and ISC PWB
(YC12)
ISC PWB (YC3) and main PWB (YC11)
Defective PWB.
Replace the DP main PWB or the ISC
PWB and check for correct operation.
9040
DP lift motor going up error
When the DP lift motor is driven, DP
lift sensor 1 does not turn on within
1500 pulse.
(Three recovery times.)
The above has been detected 5
times.
Defective con-
nector cable or
poor contact in
the connector.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, replace the cable.
DP lift motor and DP main PWB (YC5)
DP lift sensor 1 and DP main PWB
(YC4)
Defective DP lift
sensor 1.
Replace the DP lift sensor 1.
Defective DP lift
motor.
Replace the DP lift motor.
Defective DP
main PWB.
Replace the DP main PWB and check
for correct operation.
9050
DP lift motor going down error
When the DP lift motor is driven, DP
lift sensor 2 does not turn on within
1500 pulse.
(Three recovery times.)
The above has been detected 5
times.
Defective con-
nector cable or
poor contact in
the connector.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, replace the cable.
DP lift motor and DP main PWB (YC5)
DP lift sensor 2 and DP main PWB
(YC2)
Defective DP lift
sensor 2.
Replace the DP lift sensor 2.
Defective DP lift
motor.
Replace the DP lift motor.
Defective DP
main PWB.
Replace the DP main PWB and check
for correct operation.
Содержание DP 770
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