Mpf Service Check - Lexmark X925 Service Manual

7541-03x
FRU
3 Relay sensor
Paper feed clutch

MPF service check

FRU
1 MPF tray paper guides
2 MPF roll cover
3 MPF roll
MPF pad
4 MPF clutch
5
MPF paper empty lever
(actuator)
MPF sensor
6 Engine board
2-28
Service Manual
Action
• Bypass the turn guide door open sensor*.
• Turn the printer on while holding down the paper relay sensor.
- If the operator panel does not display "Paper Jam", check
for a dirty paper relay sensor.
- If the paper relay sensor is clean, or the actuator for the
paper relay sensor is broken, replace the sensor.
If the sensors are replaced and problem remains, replace the
printer controller board.
• Check the clutch cables for proper connection to CN8 on the
engine board, and CN20 on the printer controller board.
• Check the resistance of the clutch using a multi meter. The
resistance should measure 192 ohms.
If the clutch shows a significantly higher reading, replace the
clutch.
• If you replace the paperfeed, or transport clutches and the
problem remains, replace the engine board. If replacing the
registration clutch and the problem remains, replace the printer
controller board.
Action
Check the guides to ensure they are not binding. Also, check the
guides to ensure they are correctly adjusted for the paper in the
tray.
Make sure the MPF roll cover is properly installed, and not
obstructing the paperpath. Check for broken tabs, and replace the
cover if any tabs are missing.
Check for wear or damage to feed rollers and pad.
Check for dirt on the roll and pad. Clean them with a lint free damp
cloth.
Check the MPF clutch cable for proper connection to the clutch
and CN 28 on the engine board.
Make sure the MPF paper empty lever moves smoothly, and
doesn't bind. Replace the lever if it is broken.
Check the MPF sensor cable for proper connection to the sensor
and CN14 on the engine board. Also check the cable for continuity.
If replacing the MPF clutch and sensor don't resolve and MPF feed
issues, replace the engine board.