Sharp XG-NV1E, Service Manual

Page: 35 / 66

XG-NV1E
XG-NV1EA
TROUBLE SHOOTING TABLE
(Continued)
35
No sound
Yes
No
Check IC302 and its peripheral
circuits.
Yes
No
Does voltage at pin (9) of IC301
change with VOL UP/DOWN keys?
IC305 or nearby circuit in trouble.
Yes
No
Are there audio signal inputs at pins
(2) and (23) of IC301?
IC306, IC1022, IC1023 or nearby
circuit in trouble.
Yes
No
Are there audio signal inputs at pins
(1) and (9) of IC304?
Yes
No
Are there audio signal inputs at pins
(1) and (3) of connector SP?
Is sound heard with 3D SOUND off?
IC307 or nearby circuit in trouble.
IC304 or nearby circuit in trouble.
Replace speaker.
Checking IC302 and its peripheral circuits
Yes
No
Are there signal inputs at pins (27)
and (28) of IC302?
IC306, C320, C321, R334, or related
part in trouble.
Yes
No
Are there signal outputs at pins (17)
and (18) of IC302?
IC302 or nearby circuit in trouble.
IC306, C344, C345, R357, R358 or
related part in trouble.