Ricoh D131 - Page 499

SC500: Feed, Transport, Duplex, and Fusing
D131/D132/D133 2-32 SM Appendix
SC544 A
Fusing lamp overheat error 1: Hardware
The center thermistor or an end thermistor detected a temperature
of 250°C on the hot roller.
 PSU defective
 IOB defective
 BICU defective
SC545 A
Fusing lamp overheat error 2: Center lamp
After hot roller reaches warm-up temperature, the fusing lamps
remained on at full capacity for 11 samplings (1.8 s. duration) while
the hot roller was not rotating.
 Thermistor damaged, or out of position
 Fusing lamp disconnected
SC547-01 D
Zero cross signal error 1: Fusing relay
At power on and with the fusing relay off, 3 samplings detected that
the zero cross was not normal.
 Fusing relay short
 Fusing relay drive circuit defective
SC547-02 D
Zero cross signal error 2: Fusing relay
No zero cross signal was detected within 3 sec. after power on or
after closing the front door.
 Fusing relay short
 Fusing relay drive circuit defective