2-28 MFP Service Manual
7500-432, -632, and -832
920.00
Service fuser
error
Fuser unit assembly on time
failure
During the warm-up period, the control thermistor
does not detect the ready temperature even when
the specified time is passed after the main lamp is
turned on.
During the standby period, the control thermistor
does not detect the specified temperature even
when the specified time is passed after the main
lamp is on.
During the standby period, the control thermistor
does not detect the specified temperature even
when the specified time is passed after the sub lamp
in on.
During idling, after power-on, the control thermistor
does not detect the idling stop temperature even
after the specified time is passed.
During print, the control thermistor does not detect
the specified temperature even when the specified
time is passed after the main lamp is turned on.
During print, the control thermistor does not detect
the specified temperature even when the specified
time is passed after the sub lamp is turned on.
Go to “920.00 Fuser unit assembly on time
failure” on page 2-158.
921.00
Service fuser
error
Over heat temperature failure The control thermistor detects a temperature higher
than the specified value.
The lamp change thermistor detects a temperature
higher than the specified value.
Go to “921.00 Over heat temperature failure” on
page 2-159.
922.00
Service fuser
error
Center thermistor failure The center thermistor has failed.
Go to “922.00 Center thermistor failure” on
page 2-159.
923.00
Service fuser
error
Rear thermistor failure The rear thermistor has failed.
Go to “923.00 Rear thermistor failure” on
page 2-160.
924.00
Service fuser
error
Pressure roll thermistor
failure
The pressure roll thermistor has failed.
Go to “924.00 Pressure roll thermistor failure” on
page 2-160.
925.00
Service fuser
error
Fuser operating temperature
failure.
Fuser temperature is not high enough during
printing.
Go to “925.00 Fuser operating temperature
failure” on page 2-160.
927.00
Service PC
cartridge
PC cartridge RFID data write
failure
A data write error occurred on the PC cartridge
RFID tag in the PC cartridge.
Go to “927.00 PC cartridge RFID data write
failure” on page 2-161.
928.00
Service PC
cartridge
PC cartridge RFID
communication failure
A communication error occurred between the PC
cartridge RFID tag in the PC cartridge and the RFID
ASIC on the printer engine card assembly.
Go to “928.00 PC cartridge RFID communication
failure” on page 2-161.
Error code or
message
Error contents Description/Action
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