Ricoh G104 Service Manual page 351

SC
Symptom
[Level]
that is less than 67
degrees for 9 seconds is
detected five times
consecutively.
The fusing temperature
does not reach the print
ready temperature within
15 seconds after the
fusing lamp was
controlled.
High temperature detection: Software
543
The thermistor detects
[A]
230°C for 0.2 seconds.
High temperature detection: Hard
544
The thermistor detects
[A]
250°C.
Heating lamp error
The fusing lamp is
545
full-powered for 8 seconds
[A]
after the heating roller
reaches the print ready
temperature.
Zero cross error
The zero cross signal is
547
detected three times
[D]
even though the heater
relay is off when turning
on the main power.
SM
CÓPIA NÃO CONTROLADA
Possible Cause/Required Action
Incorrect power supply input at the main
power socket
Defective fusing lamp
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.
4-17
CÓPIA NÃO CONTROLADA
Service Call Conditions
G160/G161