Ricoh MP C2504 Field Service Manual page 832

SC No. Type
SC541-02 A
SC541-03 A
Error Name/Error Condition/Major Cause/Solution
Non-contact Thermistor (Center) Disconnection
Above 3F6 is detected for 1 sec. continuously (NC sensor center:
detection & compensation NC sensor edge: detection & compensation).
Detection period: 0.1 sec, detection frequency: 10 times or more.
• Non-contact thermistor disconnection
• 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.
Non-contact Thermistor (Center) 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.
Service Call 501-584
823