Ricoh D017 Service Manual page 401

Service Call Conditions
746 Stack feed motor error
The stack feed HP sensor in the 1000-sheet booklet finisher did not detect
"ON" twice (once: jam error) within the prescribed time after the stack feed
motor turned on.
-or-
The stack feed HP sensor did not detect "OFF" twice (once: jam error) for
the specified time after the stack feed motor turned on.
Motor drive obstructed
Stack feed motor harness loose, broken
Stack feed motor defective
750 B Tray lift motor error
The tray lift motor in the
1000-sheet booklet finisher
is not operating.
751 B Stack pressure solenoid error
The stack pressure solenoid
in the finisher is not
operating.
D017/D018/D019/D020/D084/D085
Motor harness loose, broken
Motor drive obstructed
Stack height sensor dirty, harness loose,
broken
Motor defective
Stack height sensor defective
Solenoid harness loose, broken
Solenoid obstructed
Stack height sensor dirty, harness loose,
broke
Solenoid defective
Stack height sensor defective
3-26 SM Appendix