Ricoh Pro 8300S - Hardware High Temperature Detection (Sensor 9); Sc543-00; Sc544-01; Software High Temperature Detection (Sensor 1): Thermopile

1.SC Codes
163
SC543-00
Error Name
Software High Temperature Detection (Sensor 1): Thermopile (Heating Roller Center)
Pattern
A
Error Condition
Abnormal high temperature is detected.
Major Cause
 Thermopile (heating roller center) (SEN58) is defective
 AC control board is defective.
 IOB is defective.
 Harness between 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 thermopile (heating roller center) (SEN58).
2. Replace the AC control board.
3. Replace the IOB.
4. Replace the harness between AC control board and IOB.
SC544-01
Error Name
Hardware High Temperature Detection (Sensor 9)
Pattern
A
Error Condition
 Heating Roller Center: T4
 Abnormal high temperature above 290°C is detected from the sensor.
(It is not detected when the fusing lamp relay is disconnected.)
Major Cause
 AC control board is defective (loading triac defective).
 IOB is defective (fusing unit control going out of control).
 Fusing temperature sensor (heating roller center) (SEN88) defective.