SC Tables
D037/D038/D040/D041 4-28 SM Appendix
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller fusing lamp consecutive full power 1
When the fusing unit is not running in the ready condition, the heating
roller fusing lamp keeps on full power for 37 seconds.
 Broken heating roller thermistor
Related SC code: SC 555
545 A
Replace the heating roller thermistor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Zero cross error
 The zero cross signal is detected three times even though the
heater relay is off when turning on the main power.
 The zero cross signal is not detected for 2 seconds even though
the heater relay is on after turning on the main power or closing the
front door.
 The detection error occurs twice or more in the 11 zero cross signal
detections. This error is defined when the detected zero cross
signal is less than 45.
 Defective fusing lamp relay
 Defective fusing lamp relay circuit
 Unstable power supply
547 D
1. Check the power supply source.
2. Replace the PSU
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller thermistor (end) error 2 551 A
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