Lexmark 2580+, Service Manual

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Diagnostic information
2-9
2580+, 2581+, 2590+, 2591+
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Service checks
Abnormal noise service check
Check the entire printer for loose parts.
Auto Sheet Feeder (ASF) service check
Note: Be sure the sheet feeder is enabled in the Setup mode. Go to “Setup mode” on page 3-8 .
Auto Sheet Feeder principles of operation
The Auto Sheet Feeder (ASF) feeds into the cut sheet paper entry throat. To use the ASF:
•
The Paper Select lever must be set to the cut sheet position.
•
The Auto Sheet Feeder must be selected in the Setup Menu.
Continuous forms can be used with the ASF installed by moving the Paper Select lever to the continuous forms
position and pressing
Start/Stop to feed the continuous forms to the first print line.
The ASF contains no electrical parts. It is driven from the gear on the inside right side frame of the printer.
The combination lock mechanism is a clutch that causes the ASF pick rollers to feed only one sheet of paper at
a time. When
Auto Sheet Feeder is selected on the Setup Menu, the cut sheet paper drive reverses itself for a
short distance during paper loading. This reversal engages the clutch and thus engages the paper picker rollers,
which feed the top sheet from the cut sheet paper stack. The sheet is fed about 5 inches (125 mm), and the
paper path briefly reverses again; this disengages the clutch and the picker rollers. The sheet is then fed to the
print line by the upper and lower feed rollers of the ASF and the lower feed rollers of the printer. Although the
ASF picker rollers continue to turn as the paper is fed, their drive is disengaged and they are actually turned by
the paper.
Step FRU Action
1 Ribbon cartridge Remove and reinstall the ribbon cartridge.
2 Printhead Disconnect the printhead cable(s).
Run the print test (do not fold or damage the cables during the test). Go to
“Print test” on page 3-2 .
Replace the printhead if the noise is gone.
3 Carrier motor ribbon
drive mechanism Disconnect the carrier motor connector J2 from the logic board. Turn the printer
off and then back on.
If the abnormal noise is gone, look for a problem with the carrier motor or ribbon
drive mechanism. Go to
“Carrier service check” on page 2-10 .
4 Paper feed mechanism Disconnect the paper feed motor J19 from the logic board.
Perform the Print Test. Go to “Print test” on page 3-2 .
If the abnormal noise is gone, look for the problem in the paper feed mechanism.
Step FRU Action
1 Paper Select sensor With the Paper Select lever in the cut sheet position, do the following:
• Try to load a cut sheet with the Load/Unload button. (This button should not
work.)
• If paper loads, go to “Paper Select sensor service check” on page 2-15 .