Lexmark 2480 - Forms Printer B/W Dot-matrix, Service Manual

Page: 38 / 170

2-20
Service Manual
24xx
4 If the prior
suggestions have
not corrected the
problem. The following may cause undefined or
intermittent failures:
1.Loose connector pins that fail to contact.
Check the following:
• Reconnect the connectors of all FRUs and
printer interface cables.
• Check the continuity of the line cord.
2.Electrical noise. Check the following:
• Power supply ground.
• Printer frame ground.
• Printer interface cable is grounded or
shielded.
3.Undefined data in user applications. Check
the baud rate at the controller. Check that the
printer interface cable matches the printer.
5 Problem occurs
only in specific
user applications. Perform the Hex Trace Print (hexadecimal
printing) by the following procedure and check
the data streams. Go to
“Hex Trace Mode” on
page 3-4 .
1. Turn the printer off.
2. Press and hold Tractor and turn the printer
on.
3. Have the user print the failing job.
4. To stop printing, turn the power off.
If the failure still occurs, replace the logic
board. Be sure to reset the bidirectional print
adjustment. See
“Bidirectional Print
Adjustment” on page 4-4 .
FRU/Symptom Action