Ricoh FW780 Service Manual - Page 414
Definition, Points to Check, Points to check
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SERVICE CALL CONDITIONS 11 May, 2001 SC Code E-4: Hot Roller Thermistor Short Definition The resistance of the hot roller thermistor is less than 0.11 KΩ. Points to Check • Hot roller thermistor • Main board (CN102-A5, -B11, -B13, -B14) SC Code E-5: Pressure Roller Thermistor Open Definition The resistance of the pressure roller thermistor is more than 0.53 MΩ. Points to Check • Pressure roller thermistor • Main board (CN102-A4, -B12, -B13, -B14) SC Code E-6: Pressure Roller Thermistor Short Definition The resistance of the pressure roller thermistor is less than 0.55 KΩ. Points to check • Pressure roller thermistor • Main board (CN102-A4, -B12, -B13, -B14) SC Code E-7: Fusing Overheat Definition The temperature detected by the hot roller thermistor exceeds 250°C. Points to Check • Hot roller thermistor • Fusing thermofuse • AC drive board • Main board (CN102-A1, -B13, -B14) B047/B048 6-2 SM