Troubleshooting Quick Reference Guide; Back-To-Back Diagnostic Self-Test - Wyse WY-60 Maintenance Manual

Note--To
fully test the terminal, let the diagnostic
self-test run five minutes.
11. If you see an error message, replace or troubleshoot the
terminal PCB; if you don't see an error, press the
SPACEBAR, then the SETUP key.
12. Turn the terminal off. Remove the test connectors, and
reattach the communications cables.
Back-to-Back Diagnostic Self-Test
The back-to-back diagnostic self-test also starts in setup mode.
This test checks communications circuitry. A special test
harness allows the test to function (see Appendix C for harness
definition or Chapter 5 for ordering information). After you
start it, the back-to-back diagnostic test continues to run until
you stop it. If the test detects an error, an error message
appears in the lower right-hand corner of the screen (see "Fails
Power-on or Diagnostic Self-Tests" in Figure 3-1).
To start the back-to-back diagnostic self-test, follow the same
steps as for the diagnostic self-test (previous page), with the
exception of step
3:
3.
Attach the test harness to the MODEM and AUX ports
on the rear of the terminal.
Note--See Appendix C for a description of the test
harness and instructions to make it. See Chapter 5 to
order it.
TROUBLESHOOTING QUICK REFERENCE GUIDE
Table 3-1 is a troubleshooting reference guide. Once you
discover the major symptoms, this table can quickly direct you to
the most likely problem area. However, don't automatically
replace the suggested modules until you've studied the problem or
checked related details in the troubleshooting flowchart.
3-4