Ricoh FT5233 Service Manual page 857

SERVICE CALL CONDITIONS
Replace the staple unit H.P. sensor.
Check the staple unit position sensor. (between CN185-10 and the ground)
Good
≥ 4.0 V
≤ 1.0 V
Check the continuity between CN185 and CN570 through CN560.
Replace the staple unit position sensor.
Replace the main control board.
Good No good
Repair the harness.
No good
< 4.0 V
> 1.0 V
Good No good
Repair the harness.
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12 February 1992