LG L1512S - No Sound

L1512S Service Manual
-24-
10/24/2002
10.3. NO SOUND
Speaker
No
Sound
Check Volume
Control Pin 1&7
Voltage 0.4~0.85V ?
Adjust OSD
Volume control
to Max. and
Check Pin 1&7
Voltage >0.4V
Check Q010
Collector has
PWM output ?
No
Check
R602 & R605 is
OK ?
Check if Speaker is
OK ?
Check if I601 Pin 4
Vp=12V ?
No
Yes
No
Yes
Change I601
TDA7057AQ
Yes
Yes
Yes
Earphone
no sound
Yes
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