C4501: Laser Malfunction - Olivetti d-Color MF651 Service Manual

Field Service Ver. 2.0 Jul. 2009

19.5.139 C4501: Laser malfunction

PH unit
Step
1 Check the connector for proper connection
and correct as necessary.
2 Change PH unit
3 REYB/PH ICP6 conduction check
4 Change REYB/PH
5 PRCB ICP17 conduction check
6 Change PRCB
19.5.140 C5104: Transfer belt motor's failure to turn
19.5.141 C5105: Transfer belt motor's turning at abnormal timing
Transfer belt motor (M1)
Step
1 Check the M1 connector for proper
connection and correct as necessary.
2 Check M1 for proper drive coupling and
correct as necessary.
3 Check the PRCB connector for proper
connection and correct as necessary.
4 M1 operation check
5 Change M1
6 PRCB ICP15 conduction check
7 Change PRCB
Y110571-1
Relevant parts
Action
Relevant parts
Action
Service Manual
PH relay board (REYB/PH)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
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—
—
—
—
—
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
—
—
PRCB CN35-3 (REM)
PRCB CN35-6 (LOCK)
—
—
—
19. TROUBLE CODE
Location (Electri-
cal component)
—
—
—
—
—
—
Location (Electri-
cal component)
—
—
—
K-3
—
—
—
815