Ricoh FT5034 Service Manual page 100

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