Ricoh M047 Service Manual page 152

Service Call Conditions
Code No.
Fusing fan error
530 B
The CPU detects the fusing fan lock
signal for more than 3 seconds.
PSU fan error
531 B
The CPU detects the PSU fan lock
signal for more than 3 seconds.
Thermistor error
The fusing temperature detected by
541 A
the thermistor is 0°C for 7 seconds
after the fusing relay has been turned
on.
Fusing temperature warm-up error
The fusing temperature does not
increase by 7°C for 10 seconds.
542 A
The fusing temperature does not
reach more than 135°C for 24
seconds after the main switch is
turned on.
Fusing overheat error: Software
A fusing temperature of over 235°C
543 A
is detected for 0.5 seconds by the
fusing thermistor.
Fusing overheat error: Software
544 A
The machine detects an overheat
error of the hardware.
M047
CÓPIA NÃO CONTROLADA
Symptom
2-4
CÓPIA NÃO CONTROLADA
Possible Cause
Poor connection of the fusing fan
Fusing fan defective
Poor connection of the PSU fan
PSU fan defective
Thermistor defective
Thermistor defective or
deformed
Fusing lamp open
Fusing thermostat open
Fusing thermistor defective
Power supply board defective
Fusing control out of control
Power supply board defective
SM Appendix