Philips MG2.1E - A4 Audio Amplifier Schematic

7 Electrical diagrams and print lay-outs
40MG2.1E
Audio amplifier
VA
+VP
-VREF2
+VREF2
VREF3
VREF1
-VP
VREF1
-VP
VA
VA
VREF1
-VP
PROTECTION
THERMAL
+VP
VB
VA
+VP
-VREF2
+VREF2
VREF3
VREF1
-VP
VREF1
-VP
VA
VA
VREF1
-VP
PROTECTION
THERMAL
+VP
VB
X
4708
8R2
470R
2724
100K
X
8R2
9742
G
H
I
J
0042
D12
0328 C1
0335 D16
0336 A16
0338
F16
2700 A3
2702 C3
2704 E4
2706 D3
2710
A4
2711 A5
2712 A6
2713 B6
2714 B6
2715
C6
2716 C6
2717 D5
2700
X
220n
4705
82K
3716
GND-SND
3701
4702
123456789
220n
11 12 13 14 15 16
1234567
RIGHT
220n
4701
47K
3715
X
2716
8 9 10 11 12 13 14 15 16
A
B
0337 E16
D
E
F
G
H
I
J
A
B
C
D
E
F
5K6
X
3714
27K
4707
15K
X
4709
2702
68K
2717
2719 C8
2720 E3
2721
E4
2722 G5
2723 G6
2724 F5
2730 B8
10
2732 C8
2733 D9
2734 F8
2735 F9
2736
G8
2737 G9
2753 D11
2754 E14
2755 A12
2756
B14
2757 B14
2758 A9
2760 C13
100K
3735
3717
2715
2706
470R
X
3713
4710
3721
3784
2761 B15
2772
H11
2773 E12
2774 G14
2775 F14
2776 F14
2777
H14
C
2781 I10
2782 D14
2783 I11
2784
J11
2791 I9
2792 J9
3700 A2
3701 A3
3702
C2
3703 C3
3704 D3
3705 E3
3706 D3
10K
DCPROT
8K2
4K7
3720
6K8
10R
3719
470R
LEFT
2704
100K
82K
3707
D3
3710 A5
3711 A5
3712 B4
3713 B6
2731
B9
3715 C4
3716 C4
3717 C5
3718 C5
3719
B7
3720 E4
3721 E4
3722 F4
3723 F5
3724
H5
3725 H5
3730 B9
3731 B9
4K7
8R2
AUDIO-L
-7V7
9709
X
X
+18V1
2730
X
3732 C9
3733
D9
3734 F9
3735 F9
3736 G9
3737 G9
3749
A8
3750 A82780 J10
3752 A9
3757 B10
3758
E9
3762 D14
3763 C12
3764 C12
3765 C13
3766
C13
3767 C14
3768 B14
3769 B16
3770 C15
3781
G14
4727
470R
3758
X
3783
GND-SND
2723
6701
150p
SOUND-ENABLE
3704
SW
3782 F12
3783 F12
3784 E14
3786 I12
3788
J12
3789 B14
3714
C6
4701 A4
4702 A6
4705
E4
4707 E8
4708 E7
4709 F7
4710 G7
4711
G7
4712 D2
4715 E3
6700 B6
6701 C7
6710
G6
9703
AUDIO-C
150K
2722
2735
2719
8K2
6711
X
2721
15K
8K2
X
2733
6711 G6
6767 H11
6768 I11
6769 J11
3751 A9
7710-A E5
7710-B A6
7740 B10
7750 E10
7761
C15
7762 B15
7790 A9
7796 C14
9703 A6
9706
D5
9709 B8
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
5K6
3723
3718
6700
39K
3725
3700
3724
2774
3702
4700 A4
3703
33n
3X15W
X
3X15W
220n
4n7
8K2 8K2
1n5
1K
7750
+7V7
1u
6K8
3707
3706
3730
82K
2732
X
2734
4n7
1n5
470R
100K
1u
3722
1n5
10u
9701
6770
J11
6710
AUDIO-R
4726
15n
X
2777
820p
220n
TDA2610Q
3705
180R
8R2
2711
3X15W
6K8
3X15W
220n
100K
2775
68n
180R
3X15W
3K9
100K
X
10K
TDA2610Q
4X15W
10K
X
DOLBY
68K
1u
2714
0338
180R
AUDIO-SL
NON DOLBY
1n5
150n
NON DOLBY
47n
470R
1n5
1u
2X15W
NON DOLBY
AUDIO-SW
3736
220n
470R
3737
DOLBY
X
100p
*
*
*
*
*
*
*
*
2720
*
**
*
*
*
*
*
*
3X15W
4X15W
4n7
3781
CENTER
100p
3K9
0337
220n
NON DOLBY
3711
100K
9752
100K
220n
2710
1n5
1u
NON DOLBY
X
9706
3732
100p
120K
47n
68n
1n5
220n
220n
DOLBY
220n
220n
1n5 1n5
220n220n
220n
470R
100p
47n
X
100p
10K10K
1K
X
*
*
*
*
*
*
*
*
*
*
220n
2773
220n
220n
6K8
220n
0V
18V2
-17V7
+18V1
0V
-17V7
+18V2
*
*
*
1K
3734
*
*
*
*
*
*
*
*
*
*
*
*
3733
*
*
*
3K9
220n
4X15W
8K2
470R
X
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
1K
DOLBY
3X15W
150n
X
220n
3712
2736
220n
10K
1n5
DOLBY
5K6
FROM / TO 0328 OF
1u
150n
4711
1u
470R
2X15W
3710
6K8
X
4n7
33n
X
2X15W
X
X
47n
8K2
*
1n5
3782
56K
AUDIO AMPLIFIER
DOLBY
X
X
*
*
*
*
1n5
2731
47n
6K8
2772
6K8
X
180R
NON DOLBY
1K
47n
220n
15K
2776
1K
X
100K
X
2X15W
100p
X
TDA2610Q
820p
X
DOLBY
X
DOLBY
X
10K
10K
1n52737
NON DOLBY
8R2
220n
X
X
3K9
3731
6K8
1n5
6K8
470R
X
NON DOLBY
8K2
33n
*
*
*
33n
*
4700
GND-SND
*
*
*
*
*
*
*
**
8R2
4X15W
220n
1K
3X15W
X
1K
X
6K8
47K
3768
3736
DCPROT
3758
6767
MC78M05
2
13
GND-SND
3
4711
-Vs
0338
1
2
3706
GND-SND
2714
A12
GND-SND
100n 2780
GND-SND
4715
2724
2712
100n
3767
47K
GND-SND
A10
GND-SND
A11
GND-SND
+Vs
6701
BAS216
2783
10u
-7V7
SOUND-ENABLE
GND-SND
A2
BC847B
7796
+VP
7
-INV1 1
-INV2 9
-VP
5
INV12 8
MUTE 2
OUT1 4
OUT2 6
V|GND 3
GND-SND
TDA7073
7750
A5
GND-SND
6710
BAS216
GND-SND
GND-SND
4702
2700
220u 2792
2734
100n
2713
3782
GND-SND
-Vs
2716
3750
2K7
GND-SND
2730
7761
BC847B
GND-SND
3715
+VP
7
-INV1 1
-INV2 9
-VP
5
INV12 8
MUTE 2
OUT1 4
OUT2 6
V|GND 3
3724
220n 2754
7740
TDA2616Q
3702
LM833N
7710-B
5
6
7
8
4
4709
GND-SND
-Vs
2710
BAS216
6711
100K
3764
2782 220n
A1
GND-SND
4712
2715
3749
3K3
3
2
1
8
4
GND-SND
3757
6K8
LM833N
7710-A
8R2
3762
BAS216
6700
GND-SND
3707
+Vs
+7V7
10u
2761
-7V7
3722
10u
2784
+5V-STANDBY
3703
3704
0042
+Vs
GND-SND
BC847B
7790
2776
3725
3713
GND-SND
2755 220n
3733
-Vs
GND-SND
GND-SND
3786
100K
GND-SND
GND-SND
3734
6769
BZX55-C2V7
3717
3718
2722
3784
9709
2753
DCPROT
GND-SND
3721
+Vs
220n
4701
GND-SND
100K
3766
GND-SND
+7V7
4710
-7V7
2781 100n
4707
8
9
220n 2756
0328
1
10
11
2
3
4
5
6
7
-Vs
A8
3705
3770
1K2
A6
GND-SND
9703
GND-SND
GND-SND
3737
2721
GND-SND
2735
10K
3751
3781
470R
3769
+7V7
4700
GND-SND
3719
3716
GND-SND
2774
SOUND-ENABLE
3752
2K2
2772
GND-SND
2758
1u
3700
GND-SND
GND-SND
GND-SND
-7V7
2702
2706
A3
3735
3763
100K
4708
4u7
2760
2737
3701
3712
3732
GND-SND
3720
2717
BZX55-C2V7
6768
2733
GND-SND
3788
3723
9706
100K
2777
GND-SND
GND-SND
3765
100K
2711
2719
3730
0336
1
2
3
2704
BC857B
7762
2731
4705
3783
GND-SND
+7V7
GND-SND
GND-SND
2723
0335
1
2
3
2773
A7
2720
2775
A4
GND-SND
3711
2736
2757 220n
GND-SND
1
2
3
GND-SND
3789
8R2
0337
+7V7
6770
MC79M05
1
23
2732
3731
3710
A9
2791 220u
3714
GND-SND