Ricoh FT5034, Service Manual

Page: 100 / 139

6.1 CALL SERVICE CONDITIONS
Unit Code Definition Detail
Exposure
11 Exposure lamp malfunction Displayed if the lamp filament is broken or if the lamp turns on during stand-by.
12
Lamp relay malfunction
Displayed if the lamp stays off or the lamp stays on longer than 10
±
4 seconds
during a copy cycle.
Optics
21 Scanner home position not on At power-up, the scanner home position sensor output is checked during the
scanner position initialization. (At home position, there should be less than 4.5 V
at CN403-4 on the main board.)
22
Scanner home position not off
23
No registration start signal Displayed when the main board does not receive the registration start signal
from the optics CPU 4.9 seconds after the 1st scanner has started to move.
24
No home position signal Displayed if the main board does not receive the H.P signal from the optics
CPU 20 seconds after the scanner return signal is initiated.
25 Scanner motor failure Displayed if the scanner drive rotation direction is not detected.
28
Lens home position not on Displayed if the lens is moving towards enlargement and the H.P sensor stays
at a low signal level for longer than 3.7 seconds.
29
Lens home position not off Displayed if the lens H.P. sensor stays at a high signal level longer than 3
seconds when the lens is moving towards reduction.
2A 2nd scanner home position not on Checked when lens has started to move.
2B 2nd scanner home position not off
2C High frequency encoder output The output of the scanner motor encoder is checked when the scanner is
moving.
2D Low frequency encoder output
2E No encoder pulse Displayed when no encoder pulse is detected.
Drum 31 Drum thermistor blown Displayed when the drum thermistor circuit is open.
Fusing
52 Thermofuse blown Displayed if the thermofuse or the fusing thermistor is open.
53 Thermistor blown
54
Ready signal not on Displayed if the ready signal is not received within 8 minutes after the power
relay turns on.
55 Fusing unit overheat Displayed if the resistance of the thermistor becomes too low.
Drive 61
Pulse generator malfunction Displayed if the CPU does not receive a pulse for longer than 1 second during a
copy cycle.
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