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XG-NV4SU
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-6
Checking the OSD circuit and its peripheral circuits
Are there signals at pins (13) thru(17)
NO
of SC1 404 connector?
----II-
Yes
I
------I--q
I
I
I
LCP circuitry faulty.
I
Aretheresignalsatpins(186)and
NO
----------------
I
(1 87) of lC8029?
-------
Yes
l
-------q
I
l
lC8025 or its peripheral circuit faulty.
I
I
----------------
I
Aretheresignalsatpins(l)and(2)of
NO
lC8037?
Yes
l
-------
-----I-q
l
lC8029 or its peripheral circuit faulty.
I
I
- - - - - - - - - - - - - - - -
I
Are there signals at pins (71), (74)
NO
thru (79) of lC8025?
Yes
-----I-
I
-----I-q
I
l
lC8037 or its peripheral circuit faulty.
I
I
t lC8036 or its peripheral circuit faulty.
;
I
I
-----IIIII-I---
-1
.
-----II
--I-I----
l
Checking the remote control
Run the remote control. Are there
signals at pins (17) and (18) of
,,,o
SC1 404 connector?
------I
Yes
-
I
-------q
I
I
I
LCD circuitry faulty.
I
---l--l
I
----------------
l
I
l
IC8001 or its peripheral circuit faulty.
I
I
I
---III---------I
I
46
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