Ricoh FT5535 Service Manual page 258

E544: Fusing overheat (back-up for E543)
- Definition - [A]
A fusing temperature of over 250 °C is detected 5 times by the main control
board (this takes 5 seconds)
- Possible Causes -
•
AC drive board defective (check the triac)
•
Fusing thermistor defective
•
Main control board defective
E547: Continuous fusing lamp on condition
- Definition - [A]
The fusing lamp stays on at full power for 70.0 seconds while in the
stand-by condition after warm-up is completed.
- Possible Causes -
•
Fusing thermistor defective
E548: Fusing ready temperature abnormal
- Definition - [A]
The fusing temperature goes 40 °C below or 40 °C over the stand-by
temperature after warm-up is completed.
- Possible Causes -
•
Fusing thermistor connector not connected properly
E620: Communication error between main control board and ARDF
- Definition - [C]
The main CPU cannot start communication with the ARDF properly.
- Possible Causes -
•
Poor connection between the main control board and ARDF
•
Main control board defective
•
DF main board defective
FSM
CÓPIA NÃO CONTROLADA
6-39
CÓPIA NÃO CONTROLADA
A156/A160/A162