Ricoh M281 Series - Page 476

Service Call 501-582
D255/D256/M281/M282 6-38 SM
SC No. Type Error Name/Error Condition/Major Cause/Solution
SC549-00 D Fusing Lamp Disconnected Error
The fusing thermistor (center) temperature does not reach a
temperature of 100 degrees C within 30 seconds after the
machine starts warming up.
 Connector pin defective
 Triac defective
 Fusing unit defective
 Fusing thermistor connection PCB defective
 IOB defective
 PSU defective
 Fusing lamp defective
 The fusing thermistor (center) detects the temperature that
exceeds 235 degrees C.
 The fusing thermistor (center) detects the temperature that
exceeds 195 degrees C in a heater-off state after the fusing
thermistor (center) detects the temperature of 155 degrees
C or less.