Ssb: Audio Amplifier + Processing (B4) - Philips LC4.1E Service Manual

Circuit Diagrams and PWB Layouts
SSB: Audio Amplifier + Processing
1
AUDIO AMPLIFIER + PROCESSING
B4
A
I719
3744
B2
AUDOUTLSL
8K2
F707
B
I701
AUDOUTLSR 3745
B2
F708 8K2
+3V3STBY
3719
10K
I720
3V3
C
B2
STANDBY
RES
* 4751
+3V3STBY
D
4X AND GATES
7751-1
74LVC08AD
SOUND_ENABLE F751
B2 3V3 1
3752
POWER_DOWN
3V3
2
B2,B5,B7
100R
7751-2
74LVC08AD
E 4
5
7751-3
74LVC08AD
9
10
7751-4
74LVC08AD
F
12
F753
B2 EXT_MUTE
3V3 13
* 4752
RES
3139 123 6019.1
1
LC4.1E AB
2 3 4
I706
2718
1u0
*EMC
3727 2742
3K9 470p
2712
I707
1u0
AUD_SUP
*EMC
3726 2741
3K9 470p
3717
10K
I714 I708
3706
10K
+3V3STBY 3722
11V2
8K2
2703
10u
16V
3725
7703 I715
10K
BC847BW 11V2
7702
3V2
BC847BW
3V3
I705
3V3
3751
100R
I751
3 3V3
6
+5VSW
3753
470R
OUT_MUTE
3755
B2
8 0V
470R F752
I752 I753
3754
7752
BC847BW
0V7
1K0
11
3V3
2 3 4
7. 28
5 6
AUD_SUP
11V1
2719 2714
100n 470u 16V
AUDIO AMP 2 X 2W
7712 P_GND P_GND
15 16
TDA1517ATW
VP1 VP2
Φ
OUT1
2V1 3 8
IN1+ OUT1A
9
POWER 5V3
OUT1B
2V1 18
AMPLIFIER
IN2-
OUT2
12
OUT2A
13
OUT2B
10V8 17 1
MODE
2
I709
5 6
SVRR
7
5V3
NC
14
19
20
2724
100u 10V
PGND
SGND 1 2 HS
4 10 11 21
F710
P_GND P_GND
1751
STANDBY
B2 3V2
1
B2
AUDOUTLSL 3V7
2
TO 1706 OF AUD AMP 2X5W
3
B2 AUDOUTLSR 3V7
4
3V3
5
7 6
MUTE
5751
Audio Processing
5 6
7 8
5736
2736
1701
I710 I721
2u2 470u 16V
1 L
4736
2
GND
2737
I711
3 R
470u 16V
I722
5737
5V3
2u2
EMC EMC
2738 2739
4737
1n0 1n0
P_GND
Audio Amplifier
7 8
1701 A8
1751 D5
2703 C4
2712 B3
B4
2714 A6
2718 B3
2719 A5
2724 B5
2736 A7
2737 B7
A 2738 B7
2739 B7
2741 B4
2742 B4
3706 B3
3717 B2
3719 C2
TO 1110 OF SIDE I/O
3722 C3
3725 C3
3726 B3
3727 B3
3744 B1
B
3745 B1
3751 D2
3752 D1
3753 E3
3754 F3
3755 F3
4736 B7
4737 B7
4751 D2
4752 F2
5736 A7
5737 B7
C
5751 E5
7702 C2
7703 C3
7712 A5
7751-1 D2
7751-2 E2
7751-3 E2
7751-4 F2
7752 F3
F707 B1
F708 B1
D F710 C6
F751 D1
F752 F4
F753 F1
I701 B2
I705 C3
I706 A4
I707 B4
I708 B4
I709 B5
I710 A6
I711 B6
E
I714 B3
I715 C3
I719 A2
I720 C2
I721 A8
I722 B8
I751 D3
I752 F2
I753 F3
F
F_15310_010.eps
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