Ricoh FW830 Service Manual page 218

31 December 1992
2. TROUBLESHOOTING SC CODES
2.1 SERVICE CALL (SC) CONDITION
2.1.1 SC Code E2 - Fusing Thermofuse Open
Definition:
The temperature detected by the hot roller thermistor does not reach 100°C
within 4 minutes after the main switch is turned on.
<Points to check>
Fusing thermofuse
•
Hot roller thermistor
•
AC controller 1
•
2.1.2 SC Code E3 - Hot Roller Thermistor Open
Definition:
The temperature detected by the hot roller thermistor does not reach 20°C
within 2 minutes after the main switch is turned on. (The resistance of the hot
roller thermistor is more than 126.5 KΩ.)
<Points to check>
Hot roller thermistor
•
Main Board (CN110-11, CN110-12)
•
2.1.3 SC Code E4 - Hot Roller Thermistor Short
Definition:
The resistance of the hot roller thermistor is less than 0.1 KΩ within 2 minutes
after the main switch is turned on.
<Points to check>
Hot roller thermistor
•
Main Board (CN110-12)
•
TROUBLESHOOTING SC CODES
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