Sound - LG L1512S Service Manual

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L1512S Service Manual
10.3. NO SOUND
Speaker
No

Sound

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