Lexmark 2580+, Руководство по обслуживанию

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2-14
Service Manual
2580+, 2581+, 2590+, 2591+
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If the paper does not stop in the correct location, see “Paper Present sensor service check” on page 2-13
and the “Top-of-forms service check” on page 2-18 .
Step FRU Action
1 Auto Sheet Feeder If the Auto Sheet Feeder is installed, remove it. Enter the Setup Menu, and reset
ASF to off. Verify that the printer works correctly without the ASF installed.
If the printer fails only with the Auto Sheet Feeder installed, go to “Auto Sheet
Feeder (ASF) service check” on page 2-9 .
2 Gear train Remove all paper from the printer.
Press FormFeed several times, and examine all rotating parts to find the
problem.
The feed rollers and pinch roller should all be clean and in good condition and
should all rotate when pressing
FormFeed .
3 Paper Select lever Be sure the selector lever alternately engages and disengages the tractor gear
and the ASF drive gear.
Check the operation of the following parts as you move the Paper Select lever:
• The tractor gear engages correctly in the continuous forms position.
• The tractor belts are in good condition and rotate correctly.
• The pinch roller shafts move downward as the lever moves to the cut sheet
position.
• The paper separator moves upward as the lever moves to the cut sheet
position.
4 Operator panel If paper does not move at all, verify that the Load/Unload button is working as
follows:
With the tractor in the push position, turn the power off and then back on, and
then press
Load/Unload . The carrier should move to the center of the platen. If
it does not, go to “Operator panel service check” on page 2-13 .
5 Paper feed motor • Check if the paper feed motor cable J19 is properly seated.
• Check the continuity of the cable. Disconnect the paper feed motor cable
J19 from the logic board. No pin should have continuity to ground.
6 Paper Select sensor Remove all paper from the printer, and place the tractor in the push position.
Press FormFeed , and time how long the gear train rotates.
• With the Paper Select lever in the cut sheet position (sensor open), the gear
train should rotate for less than 2 seconds.
• With the lever in the continuous forms position (sensor closed), the gear train
should rotate for more than 3 seconds.
If the printer does not do either of the above:
• Inspect the sensor to be sure it opens and closes by the paper separator.
• Replace the sensor if the resistance does not change from zero to infinite as
the Paper Select lever is moved.
7 Pull Tractor sensor If the pull tractor sensor fails to close, Load/Unload and Auto Tear Off do not
work when using push tractors.
The sensor fails to open. The Load/Unload button tries to park paper when using
the pull tractors but, instead, the paper feeds all of the way out of the tractors
and cannot be reloaded. See
“Pull Tractor sensor service check” on
page 2-18 .
8 Logic board If no other problem is found, replace the logic board and reset the
“Bidirectional print adjustment” on page 4-3 .