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Ricoh P C301W
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6.Troubleshooting
213
SC No.
Type
Error Name/Error Condition/Major Cause/Solution
the power after each step.
1. Re-connect the connector of the pressure roller thermistor (end) (TH4)
harness.
2. Replace the pressure roller thermistor (end) (TH4).
SC No.
Type
Error Name/Error Condition/Major Cause/Solution
SC571-
11
D
Pressure roller thermistor (end) (TH4) disconnect error: Low voltage
After turning the fusing lamp ON, the pressure roller thermistor (end) has detected
-20 °C or less continuously for 28 seconds. AND the power supply voltage is lower
than specified voltage.
Pressure roller thermistor (end) (TH4) disconnected
Harness connector lose, broken, defective
Check if the SC occurs by turning the power OFF then ON. If the SC occurs again,
do the following steps. Check if the SC reoccurs by cycling the power after each
step.
1. Check the input power source and reconnect the cable to the outlet.
2. Re-connect the connector of the pressure roller thermistor (end) (TH4)
harness.
3. Replace the pressure roller thermistor (end) (TH4).
4. If the problem is low voltage, ask the client to connect the machine directly to
a rated power source and to refrain from using extension cords.
SC No.
Type
Error Name/Error Condition/Major Cause/Solution
SC572-
02
A
No reload temperature of the pressure roller thermistor (end) (TH4)
After turning the fusing lamp ON, the pressure roller thermistor (end) has failed to
reach -40 °C continuously for 30 seconds.
Thermistor is deformed or not in contact
Power supply voltage low
Overheating protection device triggered (blown fusing thermostat)
Fusing drive non-rotation
Enter the SP mode and execute fuser SC reset. Then turn the machine OFF and
ON.
If the SC occurs again, do the following steps. Check if the SC reoccurs by cycling
the power after each step.
1. Check the input power source and reconnect the cable to the outlet.
2. Replace the pressure roller thermistor (end) (TH4).
3. Replace the fusing thermostat (TH1).

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