Read LG 47LH40 (CHASSIS:LA92G) Service Manual online
- 23 -
C
2009
8. All Source Audio
Make sure you
can t hear any audio.
OK
First check the TV SPEAKER Menu
(Menu > Sound > TV Speaker)
NO
Toggle the menu
OK
Check Mstar
AUDIO_MASTER_CLK
R603
NO
Replace Mstar(IC100)
or Main board
OK
Check Mstar I2S Output
R604, R605, R606
NO
Check signal line
Or replace IC100
Or replace IC100
OK
Check IC600 Power
*20V, 3.3V, 1.8V.
NO
Check Regulaor
IC601.IC704
OK
Check Output Signal
P600 1,2,3,4 PIN
NO
Replace NTP(Audio AMP)
IC600
OK
Check Connector & P600
NO
Replace connector
if found to be damaged.
OK
Check speaker resistance
and connector damage.
NO
Replace speaker.
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