Ricoh MP C2504 Field Service Manual page 841

6. Troubleshooting
SC No.
SC551-03
SC No.
SC552-02
SC552-03
SC552-05
SC552-06
832
Type Error Name/Error Condition/Major Cause/Solution
A Non-contact Thermistor (Edge) Short-circuit
Below AD value: 8 is detected for 1 sec. continuously.
Detection period: 0.1 sec, detection frequency: 10 times or more.
• Non-contact thermistor short-circuit
• Connector disconnected
• Harness disconnection in the fusing unit
• Harness disconnection between the fusing unit and the BCU
• BCU defective
1. Reconnect the connectors (between the fusing unit and the BCU).
2. Replace the non-contact thermistor with the harness.
3. Replace the fusing unit.
4. Replace the harness between the fusing unit and the BCU.
5. Replace the BCU.
Type Error Name/Error Condition/Major Cause/Solution
A Thermopile (Edge) Does Not Reload
65 degrees C not reached after fusing lamp 1 ON for 14 sec
continuously.
A Thermopile (Edge) Does Not Reload
Heating edge reload permission temperature not reached after fusing
lamp 1 ON for 28 sec continuously.
D Thermopile (Edge) Does Not Reload (Low Power)
65 degrees C not reached after fusing lamp 1 ON for 14 sec
continuously.
D Thermopile (Edge) Does Not Reload (Low Power)
Heating edge reload permission temperature not reached after fusing
lamp 1 ON for 28 sec continuously.