Ricoh Aficio MP201SPF Service Manual page 196

SC Tables
No.
Definition
Fusing overheat error 1
The fusing temperature detected by
543 A
the thermistor is 230°C or higher for
one second.
Fusing overheat error 2
The fusing temperature detected by
544 A
the monitor circuit is 250°C or
higher for one second.
Fusing lamp overheat error
After the fusing temperature
545 A
reaches the target, the fusing lamp
remains on for 12 seconds.
Unstable fusing temperature
While the fusing lamp is on, the
546 A
fusing temperature varies 50°C or
more within one second; and this
occurs two consecutive times.
Zero cross signal malfunction
The zero cross signal is not
detected within five seconds after
547 B
the main power switch is turned on.
Or, the zero cross signal is not
detected within one second after
operation begins.
D115/D116
Symptom
6-8
Possible Cause
Defective thermistor
Defective power supply unit
Defective thermistor
Defective power supply unit
Defective thermistor
Incorrect installation of the
thermistor
Defective power supply unit
Defective thermistor
Incorrect installation of the
thermistor
Defective power supply unit
Defective power supply unit
Defective BICU
SM