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MAINTENANCE
Table 3-11:
Troubleshootinq Flow (continued)
- - - - -+- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -+- - - - - - -
STEP !PROCEDURE/DECISION
!BRANCH
- - - - -+- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -+- - - - - - -
7
8
9
10
11
12
Power supply +5 Vdc and +12 Vdc outputs
OK?
Possibly faulty LED or cable.
Replace DC OK LED; or
Replace Front Control Panel cable.
Return to START
Microverify LED display • 6 or 7?
HALT light ON?
Press HALT button (to release it).
Return to START
Replace OAP.
If error still present, replace MCT.
Return to START
VCBOl Display Density switches set
OK?
Set: E68
=
ON
E48
sa =
OFF
Return to START
Run VCBOl diagnostic.
VCBOl passes diagnostic.
Replace VCBOl
Return to START
Possibly faulty cable.
Replace BC18T-10 video cable.
Problem resolved?
Return to START
13
Possibly monitor problem.
Repair/replace monitor.
Return to START
N
•>
5
N
•>
7
or 10
N
•>
9
y
•> 11
y
•> 12
N
•>
13
LED
=
6
or 7?
14
y
•>
8
LED
=
5?
LED
=
4?
LED
=
3?
3-30
y
•>
15
y
•>
16
y
•> 17
N •> 19
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