Ricoh D104 Field Service Manual page 594

6. Troubleshooting
No. Type
542 A
6
No. Type
543 A
592
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller warm-up error 1
• The heating roller temperature does not reach 50°C for 4 seconds after the
heating lamp on.
• The heating roller temperature does not reach the ready temperature for 43
seconds after the fusing unit has rotated.
• The heating roller temperature does not reach 100°C for 24 seconds in the
low temperature condition after the heating lamp on.
• Dirty or defective thermopile
• Defective thermopile.
• Trash on the surface of the thermopile lens.
• Defective thermostat
• Broken harness of thermostat
• Input voltage is over guaranteed value
• Defective heating roller lamp
1. Check if the thermopile is firmly connected.
2. Clean the surface of the thermopile lens.
3. Test the conductance for the thermopile and the heating roller.
4. Replace the thermopile.
5. Replace the harness of thermostat or thermostat.
6. Replace the heating roller lamp.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller fusing lamp overheat 1 (software error)
The detected fusing temperature stays at 230°C for 1 second.
• Defective PSU
• Defective BCU
1. Replace the PSU.
2. Replace the BCU.