LG 42LH30 - Page 18

- 18 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
8. All Source Audio
Check Mstar I2S Output
R604, R605, R606
Check IC600 Power
*20V, 3.3V, 1.8V.
OK
OK
Make sure you can’t hear any audio.
OK
First check the TV SPEAKER Menu
(Menu > Sound > TV Speaker)
Toggle the menu.
OK
Check Mstar AUDIO_MASTER_CLK
R603
OK
Check Connector & P600
Check Regulator IC601, IC704
No
Check signal line. Or replace IC100.
No
Replace Mstar(IC100) or Main board.
No
No
Check Output Signal P600 1, 2, 3, 4 pin.
OK
Replace NTP(Audio AMP)
IC500.
No
Replace connector if found to be damaged.
No
OK
Check speaker resistance
and connector damage.
Replace speaker.
No
*20V Voltage is dependent on model.
32/36LH20, 32LH30 => 24V
19/22LH20 => 15V(pin1 or 2)