Ricoh BE-C1 D046 Field Service Manual page 495

Fusing thermistor open
The fusing temperature detected by the thermistor remained below 5°C (41°F) for
30 sec.
SC541 A
• Thermistor cable disconnected, broken, defective
• Thermistor defective
Fusing temperature warm-up error
During warm-up after switching on the machine, or after opening and closing the
machine, hot roller did not attain the ready temperature within 5 minutes (the
temperature was detected below 3°C (37.4°F) 5 times within 5 sec.).
SC542 A
• Fusing lamp defective
• Thermistor floating, out of position
• Thermistor cable disconnected, broken
• Fusing thermistor defective
Fusing overheat error 1: Software
A fusing temperature of over 230°C (446°F) was detected for 2 sec.
SC543 A
• PSU defective
• TRIAC short, IOB board defective
• BCU board defective
Fusing overheat error 2: Hardware
The backup circuit detected fusing temperature over 235°C (455°F) for longer than
the time prescribed for high temperature fluctuation.
SC544 A
• TRIAC short, IOB board defective
• PSU board defective
• Fusing unit defective
Fusing lamp overheat error 3
SC545 A
After reaching the ready temperature, the hot roller does not start to rotate and the
fusing lamp stays on at full power for 50 sec.
SC Tables
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