Ricoh FW830 Service Manual page 219

TROUBLESHOOTING SC CODES
2.1.4 SC Code E5 - Pressure Roller Thermistor Open
Definition:
The resistance of the pressure roller thermistor is more than 1 mΩ within 2
minutes after the main switch is turned on.
<Points to check>
Pressure roller thermistor
•
Main Board (CN110-9, CN110-10)
•
2.1.5 SC Code E6 - Pressure Roller Thermistor Short
Definition:
The resistance of the pressure roller thermistor is less than 0.5 KΩ within 2
minutes after the main switch is turned on.
<Points to check>
Pressure roller thermistor
•
Main Board (CN110-10)
•
2.1.6 SC Code E8 - Exposure Lamp Thermistor Short
Definition:
The resistance of the exposure lamp thermistor is less than 2.4 KΩ for 20 sec-
onds.
<Points to check>
Exposure lamp thermistor
•
Exposure lamp heater
•
AC controller 2 (CN407-4, CN407-3)
•
Main Board (CN107-B3)
•
2.1.7 SC Code E9 - Fusing Overheat
Definition:
The temperature detected by the hot roller thermistor becomes higher than
220°C.
<Points to check>
Hot roller thermistor
•
Fusing thermofuse
•
AC controller 1 (T304/T306 for AC input voltage, T305/T307)
•
Main Board (CN107-A25, CN107-A15)
•
6-10
31 December 1992