Ricoh 4051 Service Manual

B140 SERIES AND G126 SERVICE MODE
SM 4-53 B064 Series/B140 Series/G126
Trouble-
shooting
SC700 Series: Peripherals
SC No. Symptom Possible Cause
ADF original pick-up error 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
One of the following occurred:
• 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 transport
motor does not change state
(high/low) within 600 ms and does
not change after 2 retries.
• Finisher transport motor defective, or
overloaded due to obstruction
• Transport motor harness disconnected,
or defective
• Finisher main board defective
Finisher jogger motor error 722 B
• The finisher jogger HP sensor
remains de-activated for more
than 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 overloaded due to
obstruction
• Jogger motor defective (not rotating)
• Finisher main board defective
• Harness disconnected or defective
Finisher staple hammer motor error 724 B
Stapling does not finish within 450
ms after the staple hammer motor
switches on and the stapler jams.
Stapler is released from the reverse
lock status. If the stapler does not
operate within 450 ms, even in the
reverse lock position, then the SC
is logged.
• Staple jam
• Stapler operation overload
• Staple hammer motor defective
• Staple hammer motor connector
disconnected, or defective
Finisher stack feed-out motor error 725 B
The stack feed-out belt HP sensor
does not activate within the
prescribed number of pulses after
the stack feed-out motor turns on
and does not activate after 2 retries
because the stack feed-out belt
failed to return to the home
position.
• Stack feed-out HP sensor defective
• Harness disconnected or defective
• Stack feed-out motor defective
• Finisher main board defective
• Motor overload due to obstruction

Ricoh 4051 Specifications

General

Brand	Ricoh
Model	4051
Category	All in One Printer
Language	English