Troubleshooting Quick Reference Guide; Troubleshooting Flowchart; Setup Parameters - Wyse WY-30 Maintenance Manual

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
~rea.
However, don't automatically
replace the suggested modules until you've studied the problem or
checked related details in the troubleshooting flowchart.
Table 3-1 Troubleshooting Quick Reference Guide
Symptom Possible Problem Area(s)
No display Terminal PCB, CRT/yoke assembly
.
~
Poor display quality
Wrong size display
Crooked
Too bright
Not in focus
Fails self-test
Fails diagnostic test
Inoperative keys
Can't communicate
with computer
Letters or error
codes on the screen
Touch/tilt doesn't
respond correctly
Adjustments, terminal PCB
Adjustments, terminal PCB, yoke
Terminal PCB
Terminal PCB, wrong diagnostic setup,
faulty test connectors
Keyboard, terminal PCB, keyboard cable
Setup parameters, terminal PCB,
communication cable
Terminal PCB
Touch/tilt screw tension
TROUBLESHOOTING FLOWCHART
Read the troubleshooting flowchart and match the symptoms with
the suggested solutions. Any flowchart block that requires a
procedure includes a bold number that is keyed to the legend on
each page of the flowchart. The legend lists the procedure name
and the page number in this manual where you can find the
necessary procedure.
3-3