Field Service Ver. 1.0 Aug. 2005 19. Malfunction code
237
bizhub 200/250/350
Troubleshooting
C3451 Fusing Warm-Up Failure (Main)
• The Fusing Roller Thermistor does not detect
the required temperature within 30 sec. after a
warmup cycle has begun; therefore, the copier
does not complete the warm-up cycle.
• The temperature of the Fusing Rollers does not
reach the required level even after the set period
of time has elapsed during a warm-up cycle.
A
C3452 Fusing Warm-Up Failure (Sub)
• The Fusing Roller Sub Thermistor does not
detect the required temperature within 30 sec.
after a warm-up cycle has begun; therefore, the
copier does not complete the warm-up cycle.
• The temperature of the Fusing Rollers does not
reach the required level even after the set period
of time has elapsed during a warm-up cycle.
A
C3751
High Fuser Temperature Failure
(Main)
• The Fusing Roller Thermistor and Fusing Roller
Sub Thermistor are detected to be at a tempera-
ture above 240 °C when the Main Power Switch
is set to ON.
A
C3752
High Fuser Temperature Failure
(Sub)
A
C3851
Low Fuser Temperature Failure
(Main)
• The Fusing Roller Thermistor and Fusing Roller
Sub Thermistor are detected to be at a tempera-
ture below 105 °C during standby.
• The Fusing Roller Thermistor and Fusing Roller
Sub Thermistor are detected to be at a tempera-
ture below 105 °C during printing.
A
C3852
Low Fuser Temperature Failure
(Sub)
A
C4001
Main Unit Communication
Failure
• Communications with the Mechanical Control
Board and the MFBS Board fail.
B
C4002 HSYNC Detection Failure
• No SOS falling edges are detected within the set
period of time after laser emission began while
the Polygon Motor is turning.
• No SOS falling edges are detected while VIA
remains ON.
B
C4101 Polygon Motor Failure
• The Polygon Motor Lock signal could not be
detected within the set period of time after the
Polygon Motor is energized. (Faulty start detec-
tion)
• No First Lock signals are detected during the 1-
second period that starts 1 second after a First
Lock signal. (Faulty lock signal detection)
• The Polygon Motor Lock signal could not be
detected after the set period of time has elapsed
while the Polygon Motor is turning. (Out-of-timing
lock detection)
• The Polygon Motor Lock signal is set to ON for
longer than the set period of time while the Poly-
gon Motor remains stopped. (Abnormal lock
detection)
B
C4721
Main Unit G/A Communication
Failure
• Communications with the gate array for expan-
sion I/O (the IC mounted on the Mechanical Con-
trol Board) fail.
B
C5102 Main Motor Failure
• The Transport Motor Lock signal remains set to
H for a set period of time while the Transport
Motor is turning.
B
Code Item Description Rank
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