ریکوRicoh FT4480
11 Exposure lamp
21 Scan not home
23 No signal from regulator switch
24 Scan not home
28 Lens not home
29 Lens won’t leave home
2A Second scan flasher
2B Scan sensor
2C Scanner moving too fast
2D Scanner moving too slowly
31 Drum thermistor
32 Toner sensor
41 Third cassette lift motor sensor
53 Fuser thermistor
54 Low temperature at warm up
55 High temperature at warm up
56 Low temperature after warm up
61 Pulse generator
91 Counter
93 Main board
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