LG 42LV5500 - Audio Amplification for Speakers Information

Audio Amplification for Speakers Information
Use speaker out to test for defective Audio Amp IC1702
Note: (Normal ½ Audio B
+) 12 2V on each pin
Note:
(Normal
,
½
Audio
B
+)
12
.
2V
on
each
pin
.
IC1702 VOLTAGES
3.3V_AU_AVDD pin 13
3.3V_DVDD pin 27
All made from
3.3V Norma
l
IC1702
_
Right Channel:
24V pin 34, 35 (R-)
24V pin 40, 41 (R+)
R-
R+
(1)
Left Channel:
24V pin 44, 45 (L-)
24V pin 2, 3 (L+)
L-
L+
Q1701 Back side of the board is (Mute) Active Low.
3.3V_ST Collector to AMP_MUTE_PDN Pin 19
Amp _Reset pin 25
May 2011 LCD TV 42LV5500
64