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4076-0WJ
Diagnostic Aids
Use these diagnostic test procedures to verify a repair. The test pro-
cedures are entered by first turning the machine off, moving the two-
pin jumper on connector J12, then turning the machine on. J12 is
accessed through the door opening on the right side of the machine.
The test begins when the power button is pressed. Except for adjust-
ing the bi-directional alignment, the printer does not need to be
attached to a host to run the tests. To end a test, unplug the machine
or turn it off. The jumper pattern is illustrated for each test.
Return the jumper to position 2 and 3 after you complete testing.
Test Page
This test prints a test page followed by a shortened version of the
test page. The first line is the code level and code level date. The
next line is the print cartridge nozzle pattern. The six black lines are
the purge pattern. These tests are used to verify all print cartridge
nozzles are working. There should be no breaks in the diagonal line.
A break in the diagonal line indicates one or more nozzles are not
working.
The next patterns are the bi-directional patterns. The first pattern is
in letter quality mode. The second pattern is in the draft mode.
These patterns repeat to the bottom of the page. Both letter quality
and draft quality patterns should have straight vertical lines. If these
lines appear jagged, they need to be adjusted. Install the printer on a
PC and run the bi-directional alignment adjustment procedure on the
service manual diskette.
J12
J12
Diagnostic Aids
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