Ricoh FW780 Service Manual - Page 185
Service Call Condition, SC code E-1: exposure lamp abnormal, SC code E-2: fusing thermofuse open
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2. SERVICE CALL CONDITION When a service call condition occurs, the Call Service indicator and service call codes are displayed. When the service call conditions E2, E3, E4, E5, E6, E7, and E8 conditions occur, for safety reason they cannot be cleared by turning the main switch off and on. Accessing SP38 and changing the date from "1" to "0" must be done to clear these service call conditions. 2.1 SC Code E-1: Exposure Lamp Abnormal -DefinitionThe light sensor voltage is less than 0.4 volts for 10 seconds. Exposure lamp Light sensor FL regulator (CN402-1,2,4, and 5, CN401-1, -2, -4) Main board (CN106-A3, and CN104-B1, -B2, -A29 -A30) 2.2 SC Code E-2: Fusing Thermofuse Open -DefinitionThe temperature detected by the hot roller thermistor does not reach 100 C within 4 minutes and 30 seconds after the main switch is turned on. Fusing thermofuse Hot roller thermistor AC drive board (T202-2, RA201-T4) Main board (CN106-A2, A4, B12, B14, B15) SM 6-7 A163