Gestetner B070 Service Manual page 346

SERVICE CALL CONDITIONS
SC541: Fusing Thermistor Open
Definition [A]
The fusing temperature detected by the thermistor was below 7°C for 15 s.
Possible Causes
• Fusing thermistor defective or out of position
• Poor thermistor terminal connection
SC542: Fusing Temperature Warm-up Error
Definition [A]
One of the following occurred:
•
Hot roller did not reach target operation temperature within 6 minutes after
the machine was powered or 6 minutes after the doors were closed.
•
Fusing temperature rose only 5
s after the machine was powered on, or after the doors were closed.
•
Fusing temperature rose only 5
s of the start of hot roller rotation.
Possible Causes
• Fusing lamp(s) disconnected
• Thermistor out of position
SC543: Fusing Overheat Error 1: Software
Definition [A]
A fusing temperature of over 210°C is detected for 5 s by the fusing thermistor.
This prevents the fusing lamps from switching on without a fusing lamp trigger
signal.
Possible Causes
• AC drive board defective
• BCU defective
• Reload the BCU firmware
SC544: Fusing Overheat Error 2: Hardware
Definition [A]
The fusing temperature monitoring circuit detects abnormal fusing temperature.
Possible Causes
• AC drive board defective
• BCU defective
• Reload the BCU firmware
B070/B071
CÓPIA NÃO CONTROLADA
o
C toward the fusing temperature within 20
o
C toward the fusing temperature within 25
4-26
CÓPIA NÃO CONTROLADA
SM