Ricoh FT5540 Service Manual page 67

Code #28: Lens Home Position Sensor Stays Low
Definition:
Lights if the lens is moving toward enlargement and the H.P. sensor stays at a LOW signal
level for longer than 3.82 seconds.
Observations:
The lens always moves toward enlargement at power-up. The lens is to the right of the H.P.
sensor and the lens motor does not turn on.
Points to Check:
Check if the lens is moving properly. Check CN305-9 on the optics board. Check the lens
drive section, optics board, and lens drive motor.
Code #29: Lens Home Position Sensor Stays High
Definition:
Lights if the lens is moving toward reduction and the H.P. sensor stays at a high signal level
longer than 3.82 seconds.
Observations:
The lens always moves toward reduction at power-up. The lens is to the left of the H.P. sensor
and the lens motor does not turn on.
Points to Check:
Confirm that the lens is moving properly. Check CN305-9 on the optics board. Check the lens
drive section, optics board, and lens drive motor.
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31 August 1989