Olivetti d-Color MF651 Service Manual page 792

19. TROUBLE CODE
Code Item
C4301 PH cooling fan motor
failure to turn
C4501 Laser malfunction
C5104 Transfer belt motor's
failure to turn
C5105 Transfer belt motor's
turning at abnormal timing
C5304 IH cooling fan motor/1's
failure to turn
C5306 IH cooling fan motor/2's
failure to turn
C5351 Power supply cooling fan
motor/1's failure to turn
C5354 Ozone ventilation fan
motor's failure to turn
C5356 Cooling fan motor's
failure to turn
C5370 MFP control board cooling
fan motor's failure to turn
C5372 MFP control board CPU
temperature failure
732
Detection timing
• The fan motor lock signal remains HIGH for
a predetermined continuous period of time
while the motor remains stationary.
• SOS signal is not detected even after the
lapse of a given period of time after staring
the laser output.
• SOS signal is not detected for a given
period of time during printing or IDC sensor
adjustment.
• The motor lock signal remains HIGH for a
predetermined continuous period of time
while the motor remains stationary.
• The motor lock signal remains LOW for a
predetermined continuous period of time
while the motor remains stationary.
• The fan lock signal remains HIGH for a pre-
determined continuous period of time while
the motor remains stationary.
• The fan lock signal remains HIGH for a pre-
determined continuous period of time while
the motor remains stationary.
• The fan lock signal remains HIGH for a pre-
determined continuous period of time while
the motor remains stationary.
• The fan lock signal remains HIGH for a pre-
determined continuous period of time while
the motor remains stationary.
• The fan lock signal remains HIGH for a pre-
determined continuous period of time while
the motor remains stationary.
• The fan lock signal remains HIGH for a pre-
determined continuous period of time while
the motor remains stationary.
• Temperature failure of CPU on the MFP
board was detected.
Service Manual
Field Service Ver. 2.0 Jul. 2009
Trouble iso-
lation
Y110571-1
Rank
B
B
B
B
B
B
B
B
B
B
C