Ricoh Pro 8300S - Fusing Lamp on Error (Heater 5): Pressure Roller Fusing Lamp; Sc565-00

1.SC Codes
175
Error Condition
Abnormal high temperature is detected consecutively.
Major Cause
 Fusing temperature sensor (pressure roller) (SEN80) is defective.
 AC control board is defective.
 IOB is defective.
 Harness between the AC control board and IOB is defective.
Solution
* If fusing SC occurs during inspection, execute "Fusing SC Reset" (SP5-810-001) in SP mode every
time SC occurs, and then turn the main power OFF and ON.
1. Replace the harness (as well as the fusing temperature sensor (pressure roller)).
2. Replace the AC control board.
3. Replace the IOB.
4. Replace the harness between the AC control board and IOB.
SC565-00
Error Name
Fusing Lamp On Error (Heater 5) : Pressure Roller Fusing Lamp
Pattern
A
Error Condition
Pressure roller fusing lamp is lit at full power for more than the prescribed time.
Major Cause
 Fusing temperature sensor (pressure roller) (SEN80) is blocked by a foreign object.
 Fusing temperature sensor (pressure roller) (SEN80) is dirty.
 The overheating prevention device (pressure roller thermostat (TS3)) is defective.
 Fusing lamp harness are not connected properly.
 Pressure roller fusing lamp (800W) (HT5) is defective.
 Fusing temperature sensor (pressure roller) (SEN80) is defective.
 AC control board is defective.
Solution
* If fusing SC occurs during inspection, execute "Fusing SC Reset" (SP5-810-001) in SP mode every
time SC occurs, and then turn the main power OFF and then ON.
1. Inspect the area between the fusing temperature sensor (pressure roller) and the pressure roller for