Konica Minolta bizhub C250P Service Manual page 353

23. Malfunction code
Code
C3451 Heat. Heater Trouble
C3452 Press. Heater Trouble
C3461 New Fusing Unit New Article
Release
C3751 Abnormal High Temp. (Heater)
C3752 Abnormal High Temp. (Press)
C3851 Abnormal Low Temp. (Heater)
C3852 Abnormal Low Temp. (Press)
312
Item
• The Heating Roller Thermistor/1 (TH1) and the
Heating Roller Thermistor/2 (TH3) fails to raise a
given degree of temperature even after the lapse
of a given period of time after the Heating Roller
Heater lamp/1 (H1) is turned ON.
• The detected temperature of the Heating Roller
Thermistor/1 (TH1) is lower for a given level of
degree than one of the Fusing Pressure Roller
Thermistor/1 (TH2) after the Front Door is opened
or closed, the Main Power Switch is turned ON or
TROUBLE RESET is implemented.
• The counter value of zero cross signal input is not
updated for a given period of time.
• The Fusing Pressure Roller Thermistor/1 (TH2)
fails to raise a given degree of temperature even
after the lapse of a given period of time after the
Fusing Pressure Heater Lamp (H3) is turned ON.
• The detected temperature of the Fusing Pressure
Roller Thermistor/1 (TH2) is lower for a given
level of degree than one of the Heating Roller
Thermistor/1 (TH1) after the Front Door is opened
or closed, the Main Power Switch is turned ON or
TROUBLE RESET is implemented.
• A new installation is not detected when a new
Fusing Unit is installed.
• The temperatures of the Heating Roller Ther-
mistor/1 (TH1) and the Heating Roller Thermistor/
2 (TH3) are higher than a given level of degree for
1 second or more uninterruptedly.
• The Heater Relay is OFF.
• The temperature of the Fusing Pressure Roller
Thermistor/1 (TH2) is higher than a given level of
degree for 1 second or more uninterruptedly
before the Heater temperature control starts.
• The temperature of the Fusing Pressure Roller
Thermistor/1 (TH2) is higher than a given level of
degree for 1 second or more uninterruptedly after
the Heater temperature control starts.
• The temperature of the Heating Roller Ther-
mistor/1 (TH1) is lower than a given level of
degree for 1 second or more uninterruptedly dur-
ing Ready mode, Low Power mode or printing.
• The temperature of the Heating Roller Ther-
mistor/2 (TH3) is lower than a given level of
degree for 1 second or more uninterruptedly dur-
ing Ready mode, Low Power mode or printing.
• The temperature of the Fusing Pressure Roller
Thermistor /1 (TH2) is lower than a given level of
degree for 1 second or more uninterruptedly dur-
ing Ready mode, Low Power mode or printing.
Field Service Ver. 2.0 Mar. 2006
Description Rank
A
A
B
A
A
A
A