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1
XG-NV4SU
TROUBLE SHOOTING TABLE
(Continued)
I
Checking the output PWB unit
No
Are there signal inputs at
_
SC1404, SC1405
SC1501 and
No
SC 1502?
Are voltages applied to EA
I
I
1
If there is no signal at SC1404
I
connectors and SC5502?
:I;
there
is no signal
at EA
'
and SC1 502, go to the video
1
and SC1405,
go to "Trouble
I '
:
_system block.
I I
shooting table for PC I/F unit".
'
Yes
I
connector
or SC5502,
go to
1
I
Checking the power unitblock.
J
l_----_----_-J
---^---------
J
-----------
Are there signal outputs at
pins (14) ,(16) and (18) of
IC1401 ?
No
Yes
I
I
I
Check IC1401
and their
1
I
peripheral circuits.
I
v
L,___-,-
----
- J
Are there signal inputs at pin
NO
(47) of ICllOl,
IC1201 and
IC1301?
I
I
Yes
I
Check IC1401
and their
I
I
peripheral circuits.
I
I -----------me
I
v
Are there signal outputs at pins
(17) (19) (21) (27) (29) and
(31) of IlCllOl,
IC1201 and
IC1301?
/_
No
Are there signal inputs at
1
SCllOl,
SC1201 and
SC1 301?
-------------
I
If there
is no signal
input at
I
I
pins (1) and (24) of
SCllOl, ,
I
SC1102
and SC1 103, check,
r _ _ _ _ _
1
the
switching
circuit
and
I ,
1
amplifier
circuit
of
ICl 101,
I ,
Check the R, G and B panels.
I
I
IC1201,
and IC1301, and their
I , _ _ _ _ _ _ _ _ _ _ _ _ _'
1
peripheral circuits.
I
I -------------
I
fkx_____
i Check ICllOl
JC1201 JC1301
I
and their peripheral circuits.
!
I
1 __-_--_-__-_
-I
?x______
I
I
If,there is no signal input at
I
I
prns (8) and (23) of
,
SCllOl,SC1102and
,
SC1 103, check IC1409
I
,
and their peripheral
I
I
crrcuits.
I
------------
I
I
I
I
Check IC1406, IC1407,
;
IC1408 and their
I
peripheral circuits.
I
~-----------
1
36
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