Ricoh J-P2 - Page 141

17 January, 2003 SC TABLE
4-19
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC
392-
001
Air pump motor
error
391-001: MY
391-002: CK
Three consecutive errors are
detected in motor-driver-signal
samples. The samples are
collected every 0.01 second.
• Damaged cable
• Short circuit
• Defective motor
1. Turn the main switch off and on.
2. Replace the air pump.
3. Check the circuit.
SC
440-
001
Drum motor
error
440-001: Black
440-002: Color
No drum gear position sensor
signal is detected within 0.7
second (185 mm/s), 1.0
second (125 mm/s), or 2.0
seconds (62.5 mm/s).
• Defective PCU
• Defective drum motor
• Defective drum gear
position sensor
1. Turn the main switch off and on.
2. Check and/or replace the PCU.
3. Check and/or replace the sensor.
SC
460-
001
Thermistor 1
error (open
circuit)
When the temperature
detected by thermistor 1,
which is at the left (fusing unit)
side of the laser optics unit, is
less than -30°C for 10 seconds
consecutively, the BCU
determines that the circuit is
opened and displays this SC
code.
• Thermistor 1
defective
• Cable connection
error
• BCU defect
1. Turn the main switch off and on.
2. Check the cable connections.
3. Replace the thermistor.
4. Replace the BCU.
SC
460-
002
Thermistor 1
error (short
circuit)
When the temperature
detected by the thermistor 1,
which is at the left (fusing unit)
side of the laser optics unit, is
higher than 70°C for 10
seconds consecutively, the
BCU determines that the
circuit is shorted and displays
this SC code
• Thermistor 1
defective
• Cable connection
error
• BCU defect
1. Turn the main switch off and on.
2. Check the cable connections.
3. Replace the thermistor.
4. Replace the BCU.