Ricoh B230 Service Manual page 291

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller lamp consecutive full power 2
When the fusing unit is not running in the ready condition, the pressure
roller-fusing lamp keeps ON full power for 8 seconds or more.
555 A
Broken pressure roller fusing lamp
Related SC code: SC 545
1. Replace the pressure roller fusing lamp.
2. Replace the PSU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Zero cross frequency error
When the zero cross signal is 66 or more and it is detected 10 times or
more in 11 detections, the machine determines that input 60 Hz and
557 C
SC557 occurs.
Noise (High frequency)
1. Check the power supply source.
SM 4-51 B230/B237