Lexmark 4500-00 Series, Service Manual

Page: 115 / 246

Diagnostic information
2-85
4500
Parallel port service check
1. Perform a print test to make sure the printer prints correctly. See
“Ready ” on page 2-3 or page 2-36 for more information.
2. Be sure the printer cable is designed for bidirectional printing.
3. Be sure the user Program is set up correctly.
4. For E320/E322, try enabling the parallel port pull–up resistors.
See “Parallel protocol ” on page 3-25 . Try printing a test page
after enabling resistors. If the printer still does not print, disable
the resistors. E220/E321/E323 printers do not support Mode 1;
pull–up resistors are enabled.
5. If the internal print test page prints correctly, the user
Program/printer driver is set up correctly and the correct
bidirectional parallel cable is installed, but the printer still fails to
print on command from the host computer, replace the
controller card.