Audio Amplifier (2X2W) - Philips LC4.1U AA Service Manual

Circuit Diagrams and PWB Layouts
TV & Scaler Board: Audio Amplifier (2x2W)
1

AUDIO AMPLIFIER (2x2W)

A
FOR 14, 15, 17 INCH
I719
3744
A2
AUDOUTLSL
B
100R
F707
I701
AUDOUTLSR 3745
A2
F708 100R
+3V3STBY
C
3719
10K
I720
3V3
7702
BC847BW
A2
STANDBY
4703
*
4X AND GATES
+3V3STBY
7706-1
D
74LVC08AD
SOUND_ENABLE F701
A2 3V3 1
POWER_DOWN
3V3
2
A2,A4,A5
7706-2
74LVC08AD
4
5
E
7706-3
74LVC08AD
9
10
7706-4
74LVC08AD
12
F702
A2 EXT_MUTE 3V3 13
F
* 4704
3139 123 5833.3
1
LC4.1U AA
2 3 4
I706
2718
1u0
*EMC
3727 2742
10K 470p
2712
I707
1u0
AUD_SUP
*EMC
3726 2741
10K 470p
3717
10K
I714 I708
3706
10K
+3V3STBY 3722
11V2
8K2 2704
2703
10u 16V 1u0
3725
7703 I715
10K
BC847BW
11V2
3V2
3V3
I705
A2
3V3
A2 AUDOUTLSL
I716
A2
3 3V3
FOR 20, 23 INCH
6
+3V3STBY
3730
3K3
OUT_MUTE
F709
A2
8
0V
I718 I717
3732
7710
BC847BW
0V7
1K0
11 3V3
2 3 4
7. EN 26
5 6
AUD_SUP
(10V)
2719 2714
100n 470u 16V
AUDIO AMP 2 X 2W
7712 P_GND P_GND
15 16
TDA1517ATW
VP1 VP2
I710
Φ
OUT1
3 8
IN1+ OUT1A
9
POWER
OUT1B
18
AMPLIFIER I711
IN2-
OUT2
12
OUT2A
13
OUT2B
17 1
MODE
2
I709
5 6
SVRR
7
NC
14
19
20
2724
100u 16V
PGND
SGND 1 2 HS
4 10 11 21
F710
2705
1u0
P_GND P_GND
1706
STANDBY
3V2
1
0V
2
TO 1706 OF AUD AMP 2X5W
3
AUDOUTLSR 0V
4
3V3
5
MUTE
5706
*
4703 RES
4704 RES
5 6
7 8
2736
1701
I721
470u 16V
TO 1110 OF SIDE AV
1 L
2 GND
2737
I722
470u 16V 3 R
EMC EMC
2738 2739
1n0 1n0
P_GND
7 8
1701 B8
1706 D5
2703 C3
2704 C4
2705 C4
2712 B3
2714 A6
2718 B3
A
2719 A5
2724 C5
2736 B6
2737 B6
2738 B7
2739 B7
2741 C4
2742 B4
3706 C3
3717 C2
3719 C2
3722 C3
B
3725 C2
3726 C3
3727 B3
3730 E3
3732 F3
3744 B1
3745 B1
4703 D2
4704 F2
5706 D5
7702 C2
C 7703 C3
7706-1 D2
7706-2 E2
7706-3 E2
7706-4 F2
7710 F3
7712 B5
F701 D1
F702 F1
F707 B1
F708 C1
F709 E3
D
F710 C6
I701 B2
I705 D3
I706 B4
I707 B4
I708 C4
I709 B5
I710 B6
I711 B6
I714 C3
I715 C3
I716 D3
E
I717 F3
I718 F2
I719 B2
I720 C2
I721 B7
I722 B7
F
E_14520_010.eps
160904