Ricoh FW780 Service Manual - Page 413
Troubleshooting, Service Call Conditions, Sc Code Descriptions
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SERVICE CALL CONDITIONS 6. TROUBLESHOOTING 6.2 SERVICE CALL CONDITIONS When a service call condition occurs, the Call Service indicator ! and SC codes are displayed. SC Codes E2, E3, E4, E5, E6, E7, E8, E15, E17 and E18 cannot be cleared by simply turning the main switch off and on. For safety reasons, you must set SP38 from "1" to "0" to clear these. 6.1.1 SC CODE DESCRIPTIONS SC Code E-1: Exposure Lamp Abnormal Definition The light sensor voltage is less than 0.4 volts for 10 seconds. Points to Check • Exposure lamp • Light sensor • FL regulator (CN402-1,2,4, and 5, CN401-1, -2, -3) • Main board (CN103-7, and CN105-A13, -A14, -B17, -B18) SC Code E-2: Fusing Thermofuse Open Definition After turning on the machine, the temperature detected by the hot roller thermistor does not reach 100°C within 4 minutes and 30 seconds. Points to Check • Fusing thermofuse • Hot roller thermistor • AC drive board • Main board (CN102-A3, -B11, -B13, -B14) SC Code E-3: Hot Roller Thermistor Open Definition After turning on the machine, the temperature detected by the hot roller thermistor does not reach 50°C within 3 minutes. Points to Check • Hot roller thermistor • AC drive board • Fusing thermofuse • Main board (CN102-A5, -B11, -B13, -B14) Troubleshooting SM 6-1 B047/B048