Ricoh Aficio MP171 - SC543-00 Fusing (Center) thermopile high-temperature detected (software)

SC No. Level Error Name/Error Condition/Major Cause/Solution
SC542-01 A
Fusing lamp (Center) thermistor not reloaded 1
The heater thermistor has increased by less than 2.0 degrees in 1.5
seconds 5 times in a row.
• Deformed or floating thermistor
• Input voltage out of range
• Clear the SP: fusing SC.
• Replace the thermistor.
SC542-02 A
Fusing lamp (Center) thermistor not reloaded 2
The heater (Center) thermistor does not reach the reload temperature 50
seconds after the start of motor rotation.
• Fusing lamp disconnected
• The overtemperature prevention mechanism started working
• Clear the SP: fusing SC.
• Replace the thermistor.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC543-00 A
Fusing (Center) thermopile high-temperature detected (software)
The temperature is detected to stay at 245 deg C or higher for one
second.
• Shorted triac
• Failed Engine Board
• Clear the SP: fusing SC.
• Replace the PSU.
• Replace the Engine Board.
6. Troubleshooting
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