4511-xxx
Diagnostics—all models
2-97
Parallel port service check (models E238, E240, and
E240n)
1. Perform a print test to make sure the printer prints correctly. Verify
is on, then press to print menu settings.
2. Be sure the printer cable is designed for bidirectional printing.
3. Be sure the user’s application is set up correctly.
4. If the internal print test page prints correctly, the user’s application/
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.
Parallel port service check (models E340 and E342)
1. Perform a print test to make sure the printer prints correctly. See “Print
quality pages (Prt Quality Pgs)” on page 3-23.
2. Be sure the printer cable is designed for bidirectional printing.
3. Be sure the user’s application is set up correctly.
4. Using an extra long parallel cable may require some adjustment in the
Par S strobe. See “Parallel strobe adjustment (Par S Strobe Adj)”
on page 3-30.
5. Some computers assume the printer samples data on the trailing edge
of the strobe. This printer samples data on the leading edge by default.
This process can be switched by turning Parallel Mode 2 off. To change
this setting:
a. Select PARALLEL MENU from the Ready Menu.
b. Select Parallel Mode 2.
Selections are On and Off.
6. If the printer fails to print on command from the host, verify the
following:
a. Internal print test page prints correctly.
b. The user application/printer driver is set up correctly.
c. The host computer has been restarted.
d. The bidirectional parallel cable is connected correctly and is
functional.
If the printer still fails to print correctly, replace the controller card
assembly.
Note: Always check printhead alignment after replacing the controller
card assembly.
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