Ricoh Pro 8300S - Page 170

1.SC Codes
162
 542-02: Fusing Reload Failure (Sensor 1): Thermopile (Heating Roller Center)
Pattern
A
Error Condition
 542-01:
When the machine is turned ON or recovers from energy saving mode, the fusing lamp does not
reach the target temperature within a certain period of time after heating control starts.
 542-02:
When the machine is turned on or returned from energy saving mode, the fusing lamp does not
reach the start-up target temperature within a certain period of time after heating control starts.
Major Cause
 Thermopile (heating roller center) (SEN58) is blocked by a foreign object
 Thermopile (heating roller center) (SEN58) is dirty
 Fusing lamp harness is not connected properly.
 Heating roller thermostat (end) (TS1) / (center) (TS2) are defective
 Fusing lamps (NA: 997W×3, EU: 1070W×3) (HT1) are defective
 Thermopile (heating roller center) 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. Inspect the area between the thermopile and fusing belt for any foreign object like waste paper.
2. Check if the thermopile is dirty. If necessary, clean it.
3. Check if the fusing lamp is properly connected.
4. Check if the overheating prevention device (thermostat) is conductive.
5. Replace the overheating prevention device (thermostat).
6. Replace the fusing lamp.
7. Replace the thermopile (heating roller center) (SEN58).
8. Replace the AC control board.
9. Replace the IOB.
10. Replace the harness between AC control board and IOB.