Olivetti d-color MF651, Service Manual, Page: 875 / 1053

Field Service Ver. 2.0 Jul. 2009 19. TROUBLE CODE
815
TROUBLESHOOTING
19.5.139 C4501: Laser malfunction
19.5.140 C5104: Transfer belt motor’s failure to turn
19.5.141 C5105: Transfer belt motor’s turning at abnormal timing
Relevant parts
PH unit PH relay board (REYB/PH)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
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 — —
Relevant parts
Transfer belt motor (M1) Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
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 PRCB CN35-3 (REM)
PRCB CN35-6 (LOCK)
K-3
5 Change M1 — —
6 PRCB ICP15 conduction check — —
7 Change PRCB — —
Y110571-1 Service Manual