Konica Minolta bizhub C650 Service Manual page 669

16. Malfunction code
Code Item
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)
C3923 Fusing sensor wire breaks
detection (pressurizing
side)
C3924 Fusing sensor wire breaks
detection (soaking side)
C3925 Fusing sensor wire breaks
detection (NC sensor)
C3B02 IH malfunction (CPU)
C3B03 IH malfunction (monitor)
C3B04 IH malfunction
C4101 Polygon motor rotation
trouble
C4301 PH cooling fan motor
failure to turn
614
Detection timing
• The soaking roller thermistor/1 continues to
detect a temperature lower than a predeter-
mined one for a predetermined period of
time.
• The NC sensor continues to detect a tem-
perature lower than a predetermined one for
a predetermined period of time.
• At the warm-up stage, the heating roller
thermistor/3 voltage does not decrease by
predetermined steps (temperature rise)
within a predetermined time.
• At the warm-up stage, the heating roller
thermistor/2 voltage does not decrease by
predetermined steps (temperature rise)
within a predetermined period of time.
• At the warm-up stage, the fusing pressure
roller thermistor voltage does not decrease
by predetermined steps (temperature 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 NC sensor volt-
age does not increase by predetermined
steps (temperature rise) within a predeter-
mined 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)
• Malfunction occurs in the fusing CPU.
• The polygon motor fails to turn stably even
after the lapse of a given period of time after
activating the polygon motor.
• Motor lock signal detects HIGH for a given
period time consecutively during the poly-
gon motor is rotating.
• The fan motor lock signal remains HIGH for
a predetermined continuous period of time
while the motor remains stationary.
Field Service Ver. 8.0 Jun. 2008
Trouble iso-
lation com-
pliant unit
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Rank
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A
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A
A
A
A
A
A
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B
B