Konica Minolta magicolor 7450 Service Manual page 225

14. Service call message
Code
0501 Fusing Pressure Roller warm-up
failure
0510 Abnormally low Heating Roller
temperature
0511 Abnormally low Fusing
Pressure Roller temperature
0520 Abnormally high Heating Roller
temperature
0521 Abnormally high Fusing
Pressure Roller temperature
0900 Tray 4 Elevator failure
0910 Tray 3 Elevator failure
0950 Tray 5 Elevator failure
188
Item
• 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 imple-
mented.
• The temperature of the Heating Roller Thermistor/1
(TH1) is lower than a given level of degree for 1 second
or more uninterruptedly during Ready mode, Low Power
mode or printing.
• The temperature of the Heating Roller Thermistor/2
(TH3) is lower than a given level of degree for 1 second
or more uninterruptedly during Ready mode, Low Power
mode or printing.
• The temperature of the Fusing Pressure Roller Ther-
mistor /1 (TH2) is lower than a given level of degree for 1
second or more uninterruptedly during Ready mode, Low
Power mode or printing.
• The temperatures of the Heating Roller Thermistor/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 Ther-
mistor/1 (TH2) is higher than a given level of degree for 1
second or more uninterruptedly before the Heater tem-
perature control starts.
• The temperature of the Fusing Pressure Roller Ther-
mistor/1 (TH2) is higher than a given level of degree for 1
second or more uninterruptedly after the Heater tempera-
ture control starts.
• The Lift-Up Sensor is not blocked even after the lapse of
a given period of time after the lifting motion has been
started.
• The Lift-Up Sensor is not blocked even after the lapse of
a given period of time after the lifting motion has been
started.
• The Lift-Up Sensor is not blocked even after the lapse of
a given period of time after the lifting motion has been
started.
Field Service Ver. 1.0 May 2006
Description