Lexmark X925 7541-03 series, Service Manual

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Service Manual
7541-03x
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Duplex unit service check
Paper path service checks
Paper is being picked up and carried to the registration roller (Paper jams 200, 250,
24
x ).
FRU Action
1 Feed roller belts Check for wear or damage to the feed roller belts. Replace as
necessary.
2 • Duplex clutch Check the clutch cable for proper connection to CN13 on the
engine board. If it is properly connected, replace the clutch. If this
doesn't fix the problem, replace the engine board.
3
• Duplex solenoid Check for proper operation of the solenoid and linkage. Replace as
necessary.
Check the solenoid cable for proper connection to CN10 on the
engine board. If it is properly connected, replace the solenoid. If
this doesn't fix the problem, replace the engine board.
4
Photo-interrupter assembly Ensure that the photo-interrupter actuators are operating correctly
and are in the proper position.
FRU Action
1 Paper feed cassette If there are misfeeds and jams in the paper-feed unit, check to see
if the corners of the paper in the cassette are curled upward.
If the corners are curled, turn the entire stack of paper over. The
curling could be due to humidity conditions.
2 Paper feed unit rollers
Roller clutch
Are the rollers dirty or worn? Replace as needed.
If there is a failure to pick, and the feed rollers are clean, check the
roller clutch on the paperfeed unit. This check can be performed by
turning the paper feed roll in both directions.
If the shaft can be turned in both directions, replace the roller
clutch.
3 • Paper feed roller (MPF)
• Paper feed rolls MPF,
tray 1, 2, 3, 4, 5
• MPF pad
Be sure the paper feed rollers are free of dirt and not damaged.
Be sure the MPF pad is free of dirt and not damaged.
Replace parts as necessary.
4
Gears Be sure the paper feed gears are not damaged.
5 • Paper feed clutch
• MPF clutch
• MPF frame assembly Ensure the clutches are engaging properly.
Check connector CN 8 (Main tray), CN 28 (MPF) on the engine
controller board, and CN18 on the expansion feeder controller card
for proper connection.
Replace the non working clutch. If this doesn't fix the problem,
replace the engine board.
6 • Registration sensor
• MPF sensor
• Engine controller board Check the following engine controller board connectors for proper
connection:
• Registration sensor—CN12
• MPF sensor—(CN14)
• If the connectors are properly connected, replace the sensors.
• If replacing the sensors does not fix the problem, replace the
engine control board.