Sc551-00, -02 - Ricoh MP 305 Plus Field Service Manual

6. Troubleshooting
Possible Causes
• The fusing lamp is disconnected during paper transfer.
• The connection is loose.
Troubleshooting Procedures
1. Check the power plug.
2. Replace the fusing lamp.
3. Replace the fusing thermistor (center).
4. Replace the BiCU.
5. Replace the AC board.

SC551-00, -02

Error Name
SC551-00: Fusing Thermistor (End) Disconnection Error
SC551-02: Fusing Thermistor (End) Disconnection Error (Low power)
Type
SC551-00: A
SC551-02:D (C)
Symptoms
The fusing thermistor (end) detected a temperature of 0°C or less for 8 secs when the fusing lamp is
activated at power ON/ recovery from Energy Save/ rotation after reload/ before or during or
after paper feed/ standby/ energy save/ low power mode.
Possible Causes
• The thermistor is disconnected.
• The connection is loose.
Troubleshooting Procedures
1. Reconnect the connectors (inside the fusing unit and the main machine).
2. Replace the fusing thermistor (end).
3. Replace the fusing unit.
4. Replace the BiCU.
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