LG 47LX9500 - Page 109

September LCD TV 47LX9500
109
Main Board Audio Voltage Checks
Main Board Audio Voltage Checks
Use speaker outputs to test for defective Audio Amp Note:
(Normal, ½ Audio B+ 12.35V)
Audio B+
24.7V
Pins 49-52
Mute
Pin 25
Q8800 (Mute)
Active Low.
Location:
Top left of IC8801.
Normal 3.3V Collector to
Pin 25 of all three ICs.
IC8800
Amp 1.8V
(1)
This general information covers;
• IC2101 Woofer Audio Out)
• IC2100 Front Right Audio Out) and
• IC8801 Front Left Audio Out)
Speaker Output Connectors;
• P2100 Woofer Audio Out)
• P2101 Front Right Audio Out) and
• P8800 Front Left Audio Out)
Note: 3.3V input (pin 3) from IC8005
3.3V_Normal Regulator