Ricoh FT4460, Service Manual, Page: 376 / 413

28 February 1989
2.10 CODE #41
- Phenomenon -
SC #41: Upper lift sensor output stays HIGH for more than 25 seconds after
the lift motor turns on.
- Possible Causes -
1. Cassette not inserted correctly.
2. Lift sensor malfunction
3. Lift motor malfunction
4. l/O control board malfunction
5. Paper size sensor malfunction
- Action -
Check whether the bottom plate is lifted when the cassette is inserted.
When the bottom plate is lifted:
(1) Check CN303-A8 (lift sensor) on the l/O control board while manually
interrupting and uninterrupting the sensor (interrupted: 5V, not
interrupted: 0V).
If the lift sensor voltage level remains the same, replace the lift sensor.
If the Iift sensor voltage level changes, replace the lift motor or the l/O
control board.
When the bottom plate is not lifted:
(1) If the lift motor is turning, see whether the gears are engaged and
check the cassette lifting mechanism.
(2) If the lift motor is not turning, check CN303-A20 (1st lift motor) on the
l/O control board.
If 0V when the cassette is inserted, replace the lift motor.
If constant at 24V, replace the l/O control board.
(3) If the paper size is not displayed on the operation panel, replace the
paper size switch.
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