Ricoh FT5233 Service Manual page 856

12 February 1992
17.4 CODE # H4 – STAPLE UNIT POSITION ERROR
- Definition -
When the staple unit lowers to the next bin, the staple unit position sensor
stays on for more than 1 sec or stays off for more than 500 msec.
- Possible Causes -
•
The staple unit H.P. sensor is defective
•
The staple unit position sensor is defective
•
The staple unit drive motor is defective
•
The main control board is defective
- Action -
Turn the main switch off and on.
Does the staple unit drive motor turn when the main switch is turned on?
Yes No
Check the continuity between CN150 and CN485.
Good
Check the continuity of the staple unit drive motor.
Good
Replace the main control board.
Check the staple unit H.P. Sensor. (between CN185-9 and the ground)
Good
≥ 4.0 V
≤ 1.0 V
Check the continuity between CN185 and CN480.
No good
Repair the harness.
No good
Replace the staple unit drive motor.
No good
< 4.0 V
> 1.0 V
Good No good
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SERVICE CALL CONDITIONS