Ricoh G-P3 Service Manual page 109

4. Troubleshooting
SC
[Level]
High temperature detection: Software
543
The thermistor detects 230°C
[A]
for 0.2 seconds.
High temperature detection: Hard
4
544
[A]
The thermistor detects 250°C.
Heating lamp error
545 The fusing lamp is full-
powered for 8 seconds after
[A]
the heating roller reaches the
print ready temperature.
Zero cross error
• The zero cross signal is
• The zero cross signal is
547
[D]
• The detection error
108
Symptom
detected three times even
though the heater relay is
off when turning on the
main power.
not detected for three
seconds even though the
heater relay is on after
turning on the main
power or closing the front
door.
occurs twice or more in
the ten zero cross signal
Possible Cause/Required Action
• Defective thermistor
• Defective I/O board
• Defective EGB
• Defective thermistor
• Defective I/O board
• Defective EGB
• Defective fusing unit, PSU, or EGB
1. Replace the fusing unit.
2. Replace the PSU.
• Deformed thermistor
• Thermistor coming off
• Defective fusing lamp
• Defective fusing lamp relay
• Defective fusing lamp relay circuit
• Unstable power supply
1. Check the power supply source.
2. Replace the PSU.