Sharp XV-Z1A Service Manual page 42

XV-Z1E/A
TROUBLE SHOOTING TABLE
Is sound heard with 3D SOUND off?
No sound
Yes
Does voltage at pin (9) of IC301
change with VOL UP/DOWN keys?
Yes
Are there audio signal inputs at pins
(2) and (23) of IC301?
Yes
Are there audio signal inputs at pins
(1) and (9) of IC304?
Yes
Are there audio signal inputs at pins
(1) and (3) of connector SP?
Yes
Replace speaker.
Checking IC302 and its peripheral circuits
Are there signal inputs at pins (27)
and (28) of IC302?
Yes
Are there signal outputs at pins (17)
and (18) of IC302?
Yes
IC306, C344, C345, R357, R358 or
related part in trouble.
(Continued)
No
Check IC302 and its peripheral
circuits.
No
IC305 or nearby circuit in trouble.
No
IC306, IC6002, IC6003 or nearby
circuit in trouble.
No
IC307 or nearby circuit in trouble.
No
IC304 or nearby circuit in trouble.
No
IC306, C320, C321, R334, or related
part in trouble.
No
IC302 or nearby circuit in trouble.
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