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XG-NV4SU
I
TROUBLE SHOOTING TABLE
(Continued)
Checkig the Power Unit
There is no voltage output at
yes
Is there any other output
voltage failure?
I
No
Which output voltage line fails?
-q
------I~
---I---
-------
or loose?
'
Is EA connector disconnected
yes
No
r
---I--
I
Reconnect the EA connector.
I
L --------I---
J
Is AC voltage (85264V)
No
applied across the PA
connector?
Yes
Yes
Is R724 open?
r
-------------
Replace F791.
I
L ------------
J
No
-------------
1
f
Replace IC701, IC702, T701 or
I
I
R724.
I
-------------
J
Is there short-circuit between
collector and emitter of Q702?
Yes
No
-9
-----I-q
-,,,,,.
' '
-------
J '
Replace PC702.
I
-------
J
38
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