Ricoh MT-C1 - SC700: Peripherals

15 February 2006 B140/B246 SERIES SERVICE MODE
4-57
Trouble-
shooting
SC700: Peripherals
SC No. Symptom Possible Cause
ADF original pick-up error 1 700 D
Pick-up roller HP sensor signal
does not change after the pick-up
motor has turned on.
• Pick-up roller HP sensor defective
• Pick-up motor defective
• Timing belt slipping, out of position
• ADF main board defective
ADF bottom plate motor error 701
D
• Bottom plate position sensor
does not detect the plate after
the bottom plate lift motor
switches on to lift the plate.
• Bottom plate HP sensor does not
detect the plate after the bottom
plate motor reverses to lower the
plate.
• Bottom plate position sensor defective
• Bottom plate HP sensor defective
• Bottom plate motor defective
• ADF main board defective
Finisher transport motor error 720
D
The encoder pulse of the finisher
transport motor does not change
state (high/low) within 600 ms and
does not change after 2 retries.
• Finisher transport motor defective
• Transport motor harness disconnected,
or defective
• Finisher main board defective
Finisher jogger motor error 721 B
• The finisher jogger HP sensor
remains de-activated for more
1,000 pulses when returning to
home position.
• The finisher jogger HP sensor
remains activated for more than
1,000 pulses when moving away
from home position.
• Jogger HP sensor defective
• Jogger mechanism overload
• Jogger motor defective (not rotating)
• Finisher main board defective
• Harness disconnected or defective
Feed-Out Belt Motor (B478)
B246
723
The pawl of the feed-out belt did
not return to the home position
during the prescribed time after 2
attempts to detect.
• Stack feed-out belt HP sensor loose,
broken, defective
• Feed-out belt motor defective
• Finisher control board defective
Finisher staple hammer motor error (B478) 724 B
The staple hammer motor did not
return to the home position within
the prescribed time (340 ms).
• Staple hammer HP sensor loose, broken,
defective
• Electrical overload on the stapler drive
PCB elect
• Staple hammer motor defective
• Finisher main board defective