Ricoh D146 Service Manual page 542

Service Call 501-584
SC No. Level
SC544-01 A
SC No. Level
SC544-02 A
D146/D147/D148/D149/D150
Error Name/Error Condition/Major Cause/Solution
Fusing central thermopile high temperature detection
(hardware)
In the event of an error
§
Triac defective (short-circuit)
§
Engine controller defective
§
Heating central thermopile defective
§
Fusing control software: out of control
§
If the triac is defective, replace the AC power supply board
§
If necessary, replace the BCU or the heating central
thermopile
Error Name/Error Condition/Major Cause/Solution
Fusing central NC sensor high temperature detection
(hardware)
In the event of an error
§
Triac defective (short-circuit)
§
Engine controller defective
§
Heating central thermopile defective
§
Fusing control software: out of control
§
Attach the new fusing unit, then run SP-5-810-002
§
If the triac is defective, replace the AC power supply board
§
If necessary, replace the BCU or the Fusing central NC
sensor
5-68 SM