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Circuit Diagrams and PWB Layouts
Large Signal Panel: Audio Amplifier
1
2
AUDIO AMPLIFIER
3720
3726
A
10K
1R
3721
+28V
32V
1R
3722
1R
9722
B
3707
SOUND-ENABLE
7710
A8-2
10K
BC847B
3719
POR
A8-45
47K
GND-STAR
C
GND-STAR
3703
AUDIO-R
A8-14
1K
GND-STAR
D
2705
3705
AUDIO-SW
A8-19
1K
1u
GND-STAR
3701
AUDIO-L
A8-13
1K
E
GND-STAR
F
* ONLY FOR SUBWOOFER
3139 123 5752.2
1
2
A02U AA
3
4
50V
100u
2722
GND-STAR
MUTE = 5V
3716
NORMAL = 0V
7711
3711
10K
BC847B
10K
GND-STAR
GND-STAR
GND-STAR
A56
2703
14V
220n
9702
4702
GND-STAR
14V
2721
14V
1u
2708
470u
2701
220n
A58
9715
GND-STAR
GND-SSP
3
4
7.
35
5
6
GND-STAR
GND-STAR
32V
*
9710
7701
TDA7497
13
2
VS
VS-C
1 INR
OR
14
14V
OPAMP
9 MUTE2
CENTER
MUTE/STBY
10 MUTE1
PROTECT
L/R
OL
12
14V
5 INL
OPAMP
6
INC
OC 3
14V
OPAMP
7 SVR
PGND-C
PGND
SGND
1m
4
11
15
8
2717
3715
*
4R7
GND-STAR
c701
c702
GND-AUD
GND-STAR
5
6
7
8
1739
GND-STAR
1
2
GND-STAR
3
N.C.
FOR ACTIVE SUBWOOFER
GND-STAR
5
4
3
2
1
1740
GND-STAR
2715
2716
3714
4R7
47n
47n
A57
GND-STAR
1m
SPK-R
4
2714
GND-STAR
3
2
SPK-L
1m
1
1735
2711
2713
2712
A59
3713
4R7
47n
47n
GND-STAR
FOR PASSIVE SUBWOOFER
1738
1
2
2719
2718
3
47n
47n
GND-STAR
GND-STAR
7
8
9
1735 D8
1738 E8
1739 A8
1740 B8
2701 E3
2702 E2
2703 C2
2704 D2
A
2705 D1
2706 D2
2707 B4
2708 D3
2709 A6
2710 A6
2711 D7
2712 D7
2713 D7
2714 C7
B
2715 C7
2716 C7
2717 E6
2718 E7
2719 E7
2721 D2
2722 A3
3701 E2
3702 E2
C
3703 C2
3704 D2
3705 D2
MAIN SPEAKERS
3706 D2
10W 8E R
3707 B2
3708 B2
3710 B3
10W 8E L
3711 B2
3713 D7
D
3714 C7
3715 E6
3716 B3
3719 C2
3720 A1
3721 A1
3722 B1
3723 B2
3724 C1
3725 B4
E
3726 A2
4702 D4
7701 C5
7710 C2
7711 B3
9702 D4
9710 C5
9712 E5
9715 F4
F
9722 B1
c701 F5
c702 F5
E_13950_029.eps
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