Olivetti d-Color MF651 Service Manual page 790

19. TROUBLE CODE
Code Item
C3822 Fusing abnormally low
temperature detection
(Edge of the heating
roller)
C3824 Fusing abnormally low
temperature detection
(soaking side)
C3825 Fusing abnormally low
temperature detection
(NC sensor)
C3921 Fusing sensor wire breaks
detection
(Center of the heating
roller)
C3922 Fusing sensor wire breaks
detection
(Edge of the heating
roller)
C3924 Fusing sensor wire breaks
detection (soaking side)
C3925 Fusing sensor wire breaks
detection (NC sensor)
C392A Fusing sensor
contamination
(NC sensor)
C3B02 IH malfunction (CPU)
C3B03 IH malfunction (monitor)
730
Detection timing
• The heating roller thermistor/2 continues to
detect a temperature lower than a predeter-
mined one for a predetermined period of
time.
• The soaking roller thermistor/1 continues to
detect a temperature lower than a predeter-
mined one for a predetermined period of
time.
• The heating roller temperature sensor/1
continues to detect a temperature lower
than a predetermined one for a predeter-
mined period of time.
• At the warm-up stage, the heating roller
temperature sensor/2 voltage does not
decrease by predetermined steps (tempera-
ture rise) within a predetermined time.
• At the warm-up stage, the heating roller
temperature sensor/3 voltage does not
decrease by predetermined steps (tempera-
ture rise) within a predetermined period of
time.
• At the warm-up stage, the soaking roller
thermistor/1 voltage does not decrease by
predetermined steps (temperature rise)
within a predetermined period of time.
• At the warm-up stage, the heating roller
temperature sensor/1 voltage does not
increase by predetermined steps (tempera-
ture rise) within a predetermined period of
time.
• While checking the contamination on the
heating roller temperature sensor/1,
detected temperature of the heating roller
thermistor/1 exceeded the detected temper-
ature of the heating roller temperature sen-
sor/1 for over the predetermined value for
the predetermined period of time.
• A failure in communication with the fusing
CPU continues for a predetermined period
of time.
• Though the IH heater is ON, this status can-
not be detected mechanically. (IH heater
operation failure)
• Though the IH heater is OFF, mechanically,
the ON status is detected. (Malfunction of IH
heater operation)
Service Manual
Field Service Ver. 2.0 Jul. 2009
Trouble iso-
lation
Y110571-1
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