LG 50LN54 Series Service Manual page 34

AUDIO AMP(STA380BWEF)
+3.5V_ST
R3402
10K
R3403
10K
R3404
C
R3401
10K
B Q3401
AMP_MUTE MMBT3904(NXP)
E
OPT
R3405
0
POWER_DET
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+3.3V_Normal
NC_13
C3403
NC_14
0.1uF
16V NC_15
VDDDIG1
GNDDIG1
FFX3A
FFX3B
EAPD/FFX4A
C3404
2.2uF
TWARNEXT/FFX4B
10V
VREGFILT
AGNDPLL
MCLK
AUD_MASTER_CLK
AUD_SCK
AUD_LRCK
AUD_LRCH
100 AMP_RESET
R3406 0
AMP_SDA
C3401
R3407 0
1000pF
AMP_SCL
50V
12 GND_REG C3409
0.1uF
25
11 VDD_REG 16V
26
10 OUT1A
27
9 GND1
28
8 VCC1
29
7 OUT1B
30 IC3401
6 OUT2A
31 STA380BWF
5 VCC2
32
4 GND2
33
3 OUT2B
34 49
2 VSS_REG
C3408
35
1 VCC_REG 0.1uF
36
16V
+3.3V_Normal
C3407
C3411
0.1uF 0.1uF
50V
16V
L3402
10uH
C3420 C3424
0.22uF 1000pF
R3408 R3409
C3418 50V 50V
43 43
0.22uF
50V
C3413 C3421 C3425
L3403
330pF 0.22uF 1000pF
10uH
50V 50V 50V
L3404
10uH
C3414 C3422 C3426
330pF 0.22uF 1000pF
50V C3419 50V 50V
0.22uF
R3410 R3411
50V
43 43
C3423 C3427
L3405
0.22uF 1000pF
10uH
50V 50V
+24V
L3401
CIS21J121
C3412 C3415 C3416 C3417
1uF 1uF 0.1uF 10uF
50V 50V 50V 35V
3216
SPK_L+
SPK_L-
SPK_R+
SPK_R-
NC4_S7LRM
AMP_STA380BWEF
SPK_L+
SPEAKER_L
SPK_L-
SPK_R+
SPEAKER_R
SPK_R-
P3401
WAFER-ANGLE
4
3
2
1
2012/08/29
34
LGE Internal Use Only