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r---.......
---or--------...---------..,
I.
2,
3.
4.
,Obvious symptoms include:
'
focus, tilt, centering,
physi col damage, etc.
Find failure in
~_.Ylie.s _ _ _ _ . . ~ Symptom Index.
.J'
(Use first entry
that matches failure.)
•
_ _ _ _ _ . .
~
Use Troubleshooting
Diagram, Sheet 1.
... _ _ _ _ _ . .
~
Use keyboard check
po
(Paragraph
3.2).
Yes
Find failure in
Symptom Index.
(Use first entry
that matches foil ure.)
. . _ _ _ _ _ . .
~Use
Test Pattern 1
,..
(Paragraph
5. 1 •
1).
Yes
Find failure in
Symptom Index.
(Use first entry
that matches failure.)
Find failure in
Symptom Index .
f
,-' I
L ,':,>01-
persis ...
•
-----.~
(Use first entry
that matches failure.)
a>.·.:
·n 1·1. 3277 Malfltenance Approach
'·2
1.2.3 Offline Symptoms
Once it is determined that the display station is the cause of
a failure, an offline symptom should be developed. A quick
offline test of the display station is described in paragraph
3.2. That test should expose a repairable symptom. Stop
the test as soon as a symptom becomes evident, and match
the symptom with one listed in the Symptom Index. Use
the
first
entry that matches the failure. The Symptom
Index tells what corrective action should be taken .
1.2.4 Formatted Buffer Symptoms
If
an offline symptom does not become evident, the entire
display station, including features, must be tested with the
buffer formatted. The procedure described in paragraph
5.1.1 should be used with Test Pattern 1 to develop a
symptom. Stop the test as soon as a symptom becomes
evident, and match it in the Symptom Index. Use the
first
entry that matches the failure. The Symptom I ndex tells
what corrective action should be taken.
1.2.5 Customer-Reported Failures
It may be necessary to work with a customer-reported
failure if a symptom cannot be developed offline or with
Test Pattern 1 using the procedures described in the
preceding paragraphs. Try to duplicate the conditions that
existed when the customer failure occurred. Match the
duplicated symptom in the Symptom Index and perform
the corrective action indicated. Use the
first
entry that
matches the failure.
If
the originally reported failure cannot
be duplicated, it must be assumed that it was an operator
error or an interm ittent failure that has failed to reappear.
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