Circuit Diagrams and PWB Layouts
25
7.
Small Signal Board: Audio Amplifier
MUTE
NC
IN2
IN1
V
CC
P
W
GND
ST_BY
OUT2-
OUT2+
OUT1-
OUT1+
SGND
+T
PGND
HS
OUT2B
OUT2A
OUT1B
OUT1A
SGND 1
2
NC
V
P1
V
P2
S
V
RR
MODE
IN2-
IN1+
#
A2
#
#
3716
*EMC
HET
V
AUDIO SUPPLY
BC847BS
PUMH7
FROM HERCULES
#
F
G
H
A
B
C
D
E
F
G
H
1701 D8
1702 A1
1735 E11
1752 C1
2701 B8
2702 A5
(NOT FOR HET
V
)
*EMC
**
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
A
B
C
D
E
For IT
V
Only
*EMC
**
A2
A2
2703 F6
2704 A3
2705 B5
2706 B3
2707 A10
2708 B5
2709 C8
2710 B11
2711 C11
2712 C6
2713 D9
2714 D9
2715 B10
2716 D7
2718 E7
2719 D9
2720 B1
2735 F10
2736 F10
2737 F10
2738 F10
2739 C7
2740 C7
*EMC
* A
V
B
UNDLE
TDA7297D
*EMC
FROM HERCULES
TO 1739 OF AUDIO
*EMC
A2
A2
*EMC
Fo
r I
T
V
AUDIO AMPLIFIER
TO SCALER INTERFACE
HE-T
V
AUDIO CONN.
2741 C7
2742 E7
2743 A5
2744 B5
2746 E7
2747 C2
2748 C2
2749 C2
2750 C2
3701 F1
3702 G2
3703 A4
INTERNAL AUDIO
A15
A2
3704 G2
3705 A5
3706 F6
3707 G8
3708 A4
3709 B4
3710 B4
3711 A11
3712 B4
3713 B4
3714 C6
3715 C6
3716 F8
3717 C6
3718 B11
3719 D5
3720 C7
3721 G8
3722 D6
3723 F2
3724 F2
3725 D6
3726 E7
3727 E7
RES
3728 G3
3729 G4
3735 E10
3736 E10
3737 E10
3738 E10
3739 A5
3740 A6
3741 A6
3742 B6
3743 B5
3744 E7
3745 B5
3746 F6
3747 D6
3748 F6
3749 D6
from DC-DC Con
v
RES
A15
For LCD BZX384-2
V
7
3750 F6
3751 F7
3752 B3
3753 C3
4701 A5
4702 B5
4703 D5
4704 B7
4705 B7
4706 A10
4707 B10
4708 E3
4709 E3
4710 F8
4711 G8
4714 G3
4715 F3
4716 G3
4720 B1
5720 B1
5721 B2
5722 C2
5735 E9
5736 D9
6701 G7
7702-1 D6
7702-2 C5
NC
A2
A2
*EMC
*EMC
A2
7703-1 F6
7703-2 E6
7706-1 E4
7706-2 E4
7706-3 F4
7706-4 G4
7707 B8
7708-1 F9
7708-2 G8
7709 D8
7710 G7
7713 F2
7714 G2
7740-1 A6
7740-2 B6
F701 A3
A2
(INTERNAL AUDIO)
A2
A2
**
39R
F702 B3
F705 E10
F706 E10
F707 E10
F708 E10
F710 G10
F711 D9
F712 E9
F713 E9
F714 E9
F716 A6
F717 B6
F718 B6
F719 B1
F720 B1
F721 B1
F722 B1
F723 C1
F724 C1
F725 C1
F726 C1
F727 C1
F728 C1
F729 B2
NC
*EMC
*EMC
RES
R
L
I701 A4
I702 B7
I703 B7
I704 B5
I705 A3
I706 A4
I707 B3
I709 C6
I710 C8
I711 C8
I712 C7
I713 F7
I714 D6
I715 D5
I716 D6
I717 D5
I718 E7
I719 E7
I721 G8
I724 B10
I725 B10
I726 A10
I727 B10
I728 E7
I729 E3
I730 E3
*EMC
8 OHMS/5
W
NC
I731 E3
I735 E10
I736 E10
I737 E10
I738 E10
I739 C6
I740 D6
I741 F6
I742 F6
(1M02)
(EXTERNAL AUDIO)
A2
A2
39R
NC
PDTA143ET
**
For PDP BZX384-5
V
6
22K
3739
3721
4711
7708
4710
HET
V
MT
V
##
#
3729
4714
4715
4716
3728
3704
3721
470R
470R
3716
100K
3745
5722
3749
10K
2711
F717
4710
470p
4711
+3
V
3STBY
22K
3743
3711
10K
3725
7
AUD-SUP
B7B-EH-A
1702
1
2
3
4
5
6
2R2
3735
3727
1K8
3715
1K8
F710
F722
F706
100p
2750
+3
V
3STBY
I703
3750
6K8
22K
3742
1n0
2737
3746
4703
10K
10u
2703
16
V
4706
F718
10K
3712
10K
3713
10
V
I712
1u0
2746
3706
P-GND
10K
3744
+3
V
3STBY
10K
I725
3738
2R2
+3
V
3STBY
3717
F701
10K
2743
7702-1
BC847BS
1u0
5
6
7
8
4
TS482IDT
7740-2
I726
8K2
3714
2
3
4
5
6
7
8
9
BC847BS
7702-2
1752
1
3723
1K0
2R2
3736
F724
470u
2707
16
V
6701
7710
BC847B
W
7713
1u0
2744
470p
2740
6K8
3751
8K2
3722
F719
100p
33K
3708
15
14
13
12
21
2749
6
5
4
3
2
19
1
18
17
16
20 11 10
9
8
7
I710
P-GND
PO
W
ER
AMPLIFIER
Φ
7709
F728
2742
470p
F708
2739
4704
470p
150R
3753
2712
10K
3705
1u0
1u0
2708
1u0
2704
5
7
14
6
+3
V
3STBY
74HC08P
W
7706-2
4
I719
I709
I706
3718
I707
1u0
I727
2702
2736
1n0
I740
7703-2
BC847BS
10K
I741
3747
14
11
3702
74HC08P
W
7706-4
12
13
7
3
2
1
84
10u
TS482IDT
7740-1
2716
16
V
I729
3703
10K
100n
2701
I735
P-GND
1u0
AUD-SUP
2706
P-GND
I715
I728
2705
1u0
F705
4702
33K
3709
I704
3752
150R
470p
2741
7714
BC847B
W
AUD-SUP
F723
I739
I711
I702
AUD-SUP
+3
V
3STBY
4705
I717
F729
I701
2709
16
V
4701
3720
10K
100u
F714
4R8
1701
F712
F713
DL
W
5BS
1
2
4
3
F711
2
4
3
5735
5736
DL
W
5BS
1
10K
I736
3719
I730
I713
I737
I738
I742
I718
F726
F727
BC847BS
7703-1
I716
1u0
I721
2718
100p
2747
AUD-SUP
F702
P-GND
100n
2719
3748
10K
2710
+3
V
3STBY
470p
F716
F721
100K
3741
1n0
F707
2735
F725
AUD-SUP
P-GND
10K
3724
470u
2714
16
V
1n0
1735
1
2
3
4
2738
+5
V
2
B4B-PH-K
P-GND
4720
100n
2713
5721
10
11
4
5
15
16
7
14
19
20
8
9
12
13
7707
21
3
18
17
1
2
6
TDA1517AT
W
PO
W
ER
AMPLIFIER
Φ
4707
2
6
1
I731
BC847BS
7708-1
33K
3710
3
4
7708-2
BC847BS
5
3707
I724
I705
+5
V
2-RELAIS-IO2
5720
3737
2R2
10p
2720
1K0
10
7
14
8
3701
74HC08P
W
7706-3
9
3
2748
100p
7706-1
74HC08P
W
1
2
7
14
3726
16
V
8K2
2715
470u
+3
V
3STBY
I714
3740
F720
22K
4709
+3
V
3STBY
4708
HPIC_ROUT
HPIC_ROUT
OUT_MUTE
PO
W
ER_DO
W
N
HPIC_RIN
HPIC_LIN
HPIC_LOUT
HPIC_LOUT
HP_ROUT
HP_ROUT
HP_LOUT
HP_LOUT
AUDOUTLSR
L-
L+
R-
R+
SC2_L_MON_OUT
POR-AUDIO
SOUND-ENABLE
PROTECT_AUDIO
AUDIO-R
AUDOUTLSL
AUDIO-L
HP_DET_R_DC
SOUND_ENABLE
HP_DET_IN
EXT_MUTE
SC_STANDBY
SC2_R_MON_OUT
V
SD_POS
E_14710_019.eps
020904
3139 123 5837.1
N.C.
SA3
N.C.
PDP
TO 1739
C
OR
(1M52)
LCD
Yes
No
YES
YES
NO
NO
8K2
YES
2702
12K
YES
8K2
NO
3726
NO
YES
MT
V
YES NO
IT
V
YES
NO
*
3K9
470R
YES
2K2
#
LCD
PDP
3702
3704
3728
3729
2K2
MT
V
1703
YES
YES
4708
NO
2 X 5
W
2 X 3
W
NO
12K
4702
IT
V
2708
4707
3714
4709
NO
4701
1701
NO
NO
YES
**
7708
4706
MT
V
HET
V
10K
-
-
-
6K8
1K
5K6
3K3
4714
4715
4716
-
-
-
-
Yes
Yes
Yes