Olivetti d-color MF651, Service Manual, Page: 789 / 1053

Field Service Ver. 2.0 Jul. 2009 19. TROUBLE CODE
729
TROUBLESHOOTING
C3102 Fusing roller failure to turn • When the IH power supply is turned ON,
pulse signals are not input either of the
heating roller rotation sensor within a prede-
termined period of time.

A
C3201 Fusing motor failure to
turn
• The motor lock signal remains HIGH for a
predetermined continuous period of time
while the motor remains stationary.
 B
C3202 Fusing motor turning at
abnormal timing
• The motor lock signal remains LOW for a
predetermined continuous period of time
while the motor remains stationary.

B
C3303 Fusing cooling fan motor/
1 failure to turn
• The fan motor lock signal remains HIGH for
a predetermined continuous period of time
while the motor remains stationary.

B
C3304 Fusing cooling fan motor/
2 failure to turn
• The fan motor lock signal remains HIGH for
a predetermined continuous period of time
while the motor remains stationary.
 B
C3305 Fusing cooling fan motor/
3 failure to turn
• The fan motor lock signal remains HIGH for
a predetermined continuous period of time
while the motor remains stationary.
 B
C3424 Fusing heaters trouble
(soaking side)
• After warm-up operation starts, the soaking
roller thermistor does not detect a tempera-
ture as high as a predetermined one though
a predetermined period of time has elapsed.

A
C3425 Fusing heaters trouble
(NC sensor)
• After warm-up operation starts, the heating
roller temperature sensor/1 does not detect
a temperature as high as a predetermined
one though a predetermined period of time
has elapsed.

A
C3721 Fusing abnormally high
temperature detection
(Center of the heating
roller)
• The heating roller temperature sensor/2
continues to detect a temperature higher
than a predetermined one for a predeter-
mined period of time.
• The signal is turned ON to activate the hard
ratchet in the middle of the heating side.
 A
C3722 Fusing abnormally high
temperature detection
(Edge of the heating
roller)
• The heating roller temperature sensor/3
continues to detect a temperature higher
than a predetermined one for a predeter-
mined period of time.
• The signal is turned ON to activate the hard
ratchet at the edges of the heating side.
 A
C3724 Fusing abnormally high
temperature detection
(soaking side)
• The soaking roller thermistor/1 continues to
detect a temperature higher than a predeter-
mined one for a predetermined period of
time.
• The signal is turned ON to activate the hard
ratchet on the soaking side.
 A
C3725 Fusing abnormally high
temperature detection
(NS sensor)
• The heating roller temperature sensor/1
continues to detect a temperature higher
than a predetermined one for a predeter-
mined period of time.
 A
Code Item Detection timing
Trouble iso-
lation
Rank
Y110571-1 Service Manual