Ricoh G035 Service Manual page 283

Rev. 03/2000
SC543: Fusing Overheat Error 1
Definition [A]
A fusing temperature of over 231°C is detected for 5 seconds by the fusing
thermistor.
Possible Causes
• Fusing thermistor defective
• BICU defective
• I/O board (IOB) defective
SC545: Fusing Overheat Error 2
Definition [A]
The fusing lamp stays on at full power for 30 seconds while in the stand-by
condition after warming-up is completed.
Possible Causes
• Fusing thermistor out of position
SC546: Fusing Ready Temperature Malfunction
Definition [A]
⇒
During or after machine warm-up, the sensor detects a 40°C change in the
fusing temperature 5 or more times in 1 minute.
Possible Causes
• Poor thermistor connector connection
• Poor fusing unit connection
SC547: Zero Cross Signal Malfunction
Definition [A]
Zero cross signals are not detected within a certain period within 500 ms after
the main power switch has been turned on.
Possible Causes
• Power supply board defective
• Noise on the ac power line
SC548: Fusing Unit Installation Error
Definition [A]
The machine cannot detect the fusing unit when the front cover and right cover
are closed.
Possible Causes
• Fusing unit is not installed
• Poor fusing unit connection
SM
SERVICE CALL CONDITIONS
7-13 G035