19. TROUBLE CODE Field Service Ver. 2.0 Jul. 2009
798
TROUBLESHOOTING
19.5.82 C2353: IU cooling fan motor’s failure to turn
19.5.83 C2354: Rear side cooling fan motor’s failure to turn
Relevant parts
IU cooling fan motor (FM15) PH relay board (REYB/PH)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Check the FM15 connector for proper
connection and correct as necessary.
——
2
Check the fan for possible overload and
correct as necessary.
——
3 FM15 operation check
REYB/PH CN5-1 (REM)
REYB/PH CN5-3 (LOCK)
A to B-6
4 Change FM15 — —
5 REYB/PH ICP1 conduction check — —
6 Change REYB/PH — —
7 Change PRCB — —
Relevant parts
Rear side cooling fan motor (FM16) Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Check the FM16 connector for proper
connection and correct as necessary.
——
2
Check the fan for possible overload and
correct as necessary.
——
3 FM16 operation check
PRCB CN18-2 (REM)
PRCB CN18-3 (LOCK)
C-12 to 13
4 Change FM16 — —
5 PRCB ICP7 conduction check — —
6 Change PRCB — —
Service Manual Y110571-1
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