Ricoh G-P3 - Page 109

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