Carrier Service Check - Lexmark 2591+ Service Manual

2580+, 2581+, 2590+, 2591+
Step FRU
2 Paper feed
3 Gear train
4 Combination lock
mechanism
5 Left and right hoppers

Carrier service check

Note: The carrier service check includes the carrier drive, Home Position sensor, and ribbon feed.
Step FRU
1 Carrier
2 Home Position sensor
3 Carrier motor
2-10
Service Manual
Action
If the paper does not feed, do the following:
• Remove the ASF.
• Be sure the base printer feeds paper correctly.
• If the base printer does not feed paper correctly, go to
check" on page 2-13.
Be sure the ASF drive gear on the inside right side frame of the printer rotates.
Inspect the right side gear train for damage or debris.
Remove the ASF right cover, and ensure that all the gears are in good condition.
Install the ASF, and press FormFeed.
If the picker drive shaft does not rotate, replace the combination lock
mechanism.
If the ASF picker rollers rotate but a single sheet is not picked, inspect the
springs and corner separators on the left and right hoppers.
Be sure the Paper Load lever is in the correct position.
Action
Verify the carrier motor connector is connected to the logic board at J2. If the
carrier motor connector is connected properly, check the carrier belt and the
ribbon cartridge for wear or damage. Check the belt and pulley engagement.
Manually move the carrier the full length of the carriage to check for binds and to
be sure the ribbon advances when the carriage moves in either direction.
If the carrier binds, check the following:
• Correct printhead-to-platen gap. Go to
adjustment" on page 4-2.
• Clean and lubricated carrier shaft.
• Idler pulley not binding.
• Ribbon drive rack gear teeth not damaged.
If the carrier still binds:
Remove the belt, and move the carrier again.
• If the bind is gone, replace the carrier motor.
• If the bind remains, replace the carrier.
After replacing the logic board or any parts affecting the carrier, perform the
bidirectional print adjustment. See
page 4-3.
If the carrier moves manually without binding but the Home Position Error still
occurs, verify that the logic board is receiving +40 V dc on pin J15-1. Check that
the 5 V dc Home Position sensor signal is reaching the logic board.
Replace the sensor or the short flexible cable as necessary.
If the Home Position sensor is okay, verify that the resistance of the carrier
motor windings are approximately 2 ohms for all printers.
Check the resistance at the following pin locations:
• J2 - 1 and J2 - 3
• J2 - 2 and J2 - 4
"Paper feed service
"Printhead-to-platen gap
"Bidirectional print adjustment" on
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