Service manual

Service Manual
External port tests
You should be familiar with the correct print-out pattern
before running this test. It should resemble Figure 4-3:
Printer test output.
While each test is being run the word Running will
appear next to the test and-then, when the test is
complete, the pass/fail message will overwrite it. The
Printer test sends a test pattern to the printer. The
pattern comprises a repeated series of stepped lines,
each representing bits 0 to 7. You should look for
missing or corrupted pattern. As this is a subjective test
make a note of any faults that you detect.
The RS423 port test is carried out automatically and
gives a PASSED/FAILED message.
The screen will clear and the following will be displayed:
External Ports Tests Vx.xx DEALER
Passed PRINTER Test Epson FX
Passed Printer Graphic Test.
Passed Printer Text Test.
Passed RS423 Serial Port Tests.
Passed RS423 Control Line Tests.
Passed RS423 Data Line Tests.
Passed RS423 Baud Rate Test.
Passed RS423 Communistate Test.
NOT DOING Econet TEST
THIS SUB-TEST HAS PASSED
PRESS <SPACE BAR> TO CONTINUE
Check the printout.
Figure 4-3: Printer test output
Part 4 - Fault diagnosis Issue 2, June 1991 4-11