Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
M 37-DC
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
M 37-DC
GRUNDIG Service
GRUNDIG Service
4 - 13
4 - 14
2
1
2
1
STOP
Pb deck A
Pb deck B
REC (line in)
Dubbing
HS Chrome
NS Chrome
REC MUTE
HS Ferro
NS Ferro
Pb deckB
REC MUTE
REC MUTE
2
1
1
2
STOP
HS Chrome
REC
Pb Chrome
Pb Ferro
o/p mute
o/p mute
TAPE-L
R
L
3781
7740 7760
(7750)
CLK
6770
SYMM.
BIAS
LEVEL
BIAS
DECK-A/DCC L PB-LEVEL
DECK-B L PB-LEVEL
DECK-B R PB-LEVEL
DECK-A/DCC R PB-LEVEL
REC-LEVEL-L
REC-LEVEL-R
3789
3778
3764
3762
3694
To: 3693
To:
EQUALISATION
PLAY BACK
Rec In R
Pb In R
Rec Out R
Rec Out L
R-Ref.
GND
Vref
Pb In L
Rec In L
VCC
Line Out L
Time Const.L
Pb/_Rec
On/_Off
Time Const.R
Line Out R
BIAS
CONNECTOR
RIGHT CHANNEL
LEFT CHANNEL
Head
Erase
R
L
DECK B
REC/PB
DECK A
PLAY BACK
TEST
SELECTOR IC
ALC
ALC
ALC DELAY
REC/Pb-AMPLIFIER
BIAS
REC.EQUALISATION
MUTE
To 3736
To 3735
To 7710
7730
7740
7760
-CMOS
TAPE-L
TAPE-R
+12V
GND A
REC-L
DATA
STROBE
GND P
DOLBY
CRO2
REC
(7750)
(7750)
(1701)
(1701)
(7750)
(7750)
(7750)
(7750)
To 3690
To 3790
To 3779
6774
3786
Vss
Q3
Q2
Q1
Q0
Qs
Q7
Q6
Q5
Q4
E0
Vcc
CLK
DATA
STR
Qs'
To 7710 7730
REC-R
(1702)
(1702)
(1702)
(7750)
(7750)
(7750)
(7750)
(7750)
(7750)
(1706)
(7750)
8.0V
-9V
-9V
8.0V
4
5
6
1
7
8
9
10
11
12
13
14
15
16
17
18
2
19
20
21
3
K
J
I
H
N
G
F
E
D
C
B
A
M
L
K
J
I
H
N
G
F
E
D
C
B
A
M
L
4
5
6
1
7
9
10
11
12
13
14
15
16
17
18
2
19
20
21
3
47k
3667
47k
3668
3768
10k
1k8
3744
1k8
3743
3767
330R
3769 10k
3790
47k
47k
3760
3783
4k7
4k7
3745
4k7
3746
39k
3645
39k
3646
4M7
3781
68R
3693
68R
3695
18k
3735
18k
3736
3k3
3633
3k3
3639
47k
3637
47k
3643
3k3
3634
3k3
3640
3725
220k
82k
3665
180k
3663
470k
3661
33k
3659
1k
3657
8k2
3774
3789 22k
3770
1k5
3775 15R
3776
6k8
3786
2k2
220
3701
220
3703
220
3702
220
3704
220
3705
3706
220
8k2
3719
3771
1k2
1M
3787
2k2
3714
8k2
3720
22R
3710
5k6
3732
2k7
3730
5k6
3728
180k
3712
3k9
3718
1M
3780
4k7
3733
100
3708
1k8
3716
2k2
3713
22R
3709
5k6
3731
2k7
3729
5k6
3727
180k
3711
3k9
3717
100
3707
1k8
3715
3734 4k7
8k2
3772
5k6
3722
3724
12k
5k6
3721
3723
12k
1M
3788
3777
150R
3782
4k7
10k
3761
820
3762
3784
15k
3779
330k
5k6
3650
1k
3652
3k3
3648
5k6
3649
1k
3651
3k3
3647
47k
3631
47k
3632
47k
3638
47k
3644
1k
3658
33k
3660
470k
3662
180k
3664
82k
3666
220k
3726
39k
3765
3766
4M7
180k
3763
470
3764
10k
3690
43k
3692
10k
3691
A
A
A
A
A
A
A
P
P
P
A
A
A
P
P
P
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
P
P
P
P
P
P
A
P
A
P
P
P
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
5702
2u2
5703 2u2
3778 10R
10R
3694
4639
4640
4n7
2741
22n
2740
2734
470p
2738
22n
2737
22n
2733
470p
220n
2633
220n
2634
18n
2643
10p
2645
100p
2639
680n
2637
680n
2638
2781
10n
4n7
2782
2784
22n
2707
470p
2705
100p
2703
100p
470p
2708
100p
2702
100p
2704
2701
100p
18n
2720
18n
2719
180p
2723
100p
2712
2n2
2718
100p
2706
2710
330p
100p
2786
27n
2730
33n
2722
100p
2711
2n2
2717
330p
2709
27n
2729
33n
2721
100n
2735
2728
680p
2727
680p
22n
2752
100n
2783
33n
2787
3n3
2636
3n3
2635
47n
2631
47n
2632
100p
2640
10p
2646
18n
2644
220p
2726
220p
2725
180p
2724
2760
100n
1n
2788
1
2
3
1730
1
1711
2
3
4
3
1
1701
2
3
4
5
6
7
6
5
4
2
1
1706
7
4
1
1720
2
3
5
6
2695
2u2
4u7
2647
4u7
2641
100u
2694
10u
2714
100u
2716
10u
2713
100u
2715
1u
2785
4u7
2642
4u7
2648
2762
2u2
2763
100u
2765
47u
2761
220u
100u
2693
4u7
2691
100u
2692
10u
2767
2780
22u
-C
REC
REC
-C
+C
-C
-C
-C
-C
+C
Vref
Vref
Vref
CR
+C
+C
Vref
Vref
Vref
+C
DOLBY
Vref
2A2
2A2
3A0
3A2
1A0
1A1
1A0
REC-R
REC-L
1A0
1A1
2A0
2A1
2A2
3A0
3A1
3A2
1A0
1A1
1A0
1A1
2A0
2A1
2A2
3A1
2A2
BC848C
7788
7787
BC848C
7633
BC848C
7631
BC848C
BC848C
7780
BC848C
7783
7781
BC848C
7634
BC848C
7632
BC848C
HEF4952BT
7710
5
3
1
6
2
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7730
5
3
1
6
2
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7740
1
2
3
5
6
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7760
1
2
3
5
6
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7710
15
11
12
14
16
S4b
S0b
S1b
S2b
S3b
HEF4952BT
7730
11
12
14
15
16
S4b
S0b
S1b
S2b
S3b
HEF4952BT
7740
11
12
14
15
16
S4b
S0b
S1b
S2b
S3b
HEF4952BT
7760
11
12
14
15
16
S4b
S0b
S1b
S2b
S3b
6770
1N4148
6776
1N4148
6773
1N4148
6771
1N4148
6772
1N4148
6775
1N4148
6774
1N4148
9
10
11
16
1
14
13
15
7720
AN7318S
7
6
4
12
5
3
2
8
7720
AN7318S
CXA1101M
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
7630
2696
2u2
7760
HEF4952BT
10
13
4
7
8
9
SS
DD
EE
V
V
V
0
0
0
0
1
1
2
2
3
3
2
2
4
4
1
1
S
S
1
1
1
1
1
1
0
0
0
0
1
S
S
1
1
S
S
1
1
1
S
S
1
1
1
1
S
S
1
1
1
1
A
A
1
0
0
1
1
0
0
1
A
A
A
A
0
1
0
1
0
1
0
1
7730
HEF4952BT
10
13
4
7
8
9
SS
DD
EE
V
V
V
0
0
0
0
1
1
2
2
3
3
2
2
4
4
1
1
S
S
1
1
1
1
1
1
0
0
0
0
1
S
S
1
1
S
S
1
1
1
S
S
1
1
1
1
S
S
1
1
1
1
A
A
1
0
0
1
1
0
0
1
A
A
A
A
0
1
0
1
0
1
0
1
7740
HEF4952BT
10
13
4
7
8
9
SS
DD
EE
V
V
V
0
0
0
0
1
1
2
2
3
3
2
2
4
4
1
1
S
S
1
1
1
1
1
1
0
0
0
0
1
S
S
1
1
S
S
1
1
1
S
S
1
1
1
1
S
S
1
1
1
1
A
A
1
0
0
1
1
0
0
1
A
A
A
A
0
1
0
1
0
1
0
1
8
13
4
10 9
7
SS
DD
EE
V
V
V
0
0
0
0
1
1
2
2
3
3
2
2
4
4
1
1
S
S
1
1
1
1
1
1
0
0
0
0
1
S
S
1
1
S
S
1
1
1
S
S
1
1
1
1
S
S
1
1
1
1
A
A
1
0
0
1
1
0
0
1
A
A
A
A
0
1
0
1
0
1
0
1
6760
BZX79
7750
HEF4094BT
16
15
14
13
12
11
10
98
7
6
5
4
3
2
1
4k7
3656
4k7
3655
4k7
3773
100k
3785
20k
3636
20k
3642
20k
3641
20k
3635
BC558C
7782
BC856B
7784
6777
8V2
5701
1
2
3
4
5
6
MT
NJM4560
7640
8
2
3
1
NJM4560
7640
4
5
6
7
5632
3
4
1
6
5631
3
4
1
6
J111
7785
J111
7786
14.6.96
8
3655
3656
3659
Deck A = Deck 1
Deck B = Deck 2
13
12
+12V
5.0V
11.8V
11.2V
0.3V
5.0V
+12V
2.3V
-19V
-9V
0V
0V
0V
0V
0V
0V
4.8V
0V
9.8V
9.8V
4.8V
1.2V
-9V
0V
0V
0V
0V
0V
0V
0V
0V
8.0V
7.3V
1.2V
1.8V
+12V
0V
0V
0V
0V
0V
0V
0V
0V
8.0V
-9V
0V
0V
0V
0V
0V
0V
0V
0V
6.1V
6.1V
6.2V
6.2V
6.1V
6.1V
6.1V
6.1V
6.2V
6.2V
6.2V
0.4V
6.2V
0V
6.1V
6.0V
12V
6.1V
6.2V
0.4V
6.2V
5V
1.2V
6.0V
+12V
6.1V
+12V
-9V
10
11
6.1V
+12V
5.1V
5V1
+12V
15
14
16
Cassettenteil / Tape Part
Teil 1 / Part 1
to 56 AF
page 4 - 25
to 22 Front
page 4 - 8
3656
B21
3657
J19
3658
B18
3659
I19
3660
A19
3661
K18
3662
A18
3663
K17
3664
A17
3665
K17
3666
A17
3667
G14
3668
A14
3690
H19
3691
D20
3692
D19
3693
I18
3694
G18
3695
I17
3701
F 2
3702
E 2
3703
E 3
3704
D 3
3705
E 6
3706
C 6
3707
F 6
3708
D 6
3709
H 6
3710
E 6
3711
G 8
3712
D 8
3713
F 9
3714
C 9
3715
F 9
3716
D10
3717
H 9
3718
B 9
3719
I 8
3720
B 8
3721
I 8
3722
B 9
3723
I 6
3724
B 6
3725
J 6
3726
A 6
3727
F10
3728
D10
3729
G10
3730
D10
3731
G10
3732
D10
3733
F 4
3734
D 3
3735
E 3
3736
C 3
3743
L17
3744
L18
3745
L17
3746
K17
3760
E 9
3761
L 5
3762
L 3
3763
F 7
3764
D 7
3765
E 8
3766
E 9
3767
N19
3768
K20
3769
M 5
3770
M 2
3771
M 3
3772
M 4
3773
L 4
3774
L 4
3775
N 3
3776
N 3
3777
N 2
3778
L 2
3779
J 3
3780
J 2
3781
J 2
3782
I 1
3783
I 1
3784
H 2
3785
H 2
3786
N 6
3787
J 4
3788
J 4
3789
N 5
3790
M 6
4593
F12
4637
E14
4638
B14
4639
G14
4640
D14
4643
B 9
4644
A 6
4799
K 6
5631
G17
5632
E17
5701
M 1
5702
I 3
5703
J 2
6760
N18
6770
L 2
6771
L 2
6772
K 1
6773
J 2
6774
J 3
6775
J 4
6776
N 4
6777
L 4
7630
F18
7631
H17
7632
C17
7633
H16
7634
C16
7640
J17
7640
A17
7710
G 5
7710
D 5
7710
G 4
7720
E 7
7720
C 7
7730
H 7
7730
B 7
7730
K 7
7740
C12
7740
H11
7740
E12
7750
N17
7760
E14
7760
H13
7760
B14
7780
N 5
7781
N 3
7782
L 2
7783
L 3
7784
J 2
7785
I 2
7786
I 3
7787
E 9
7788
N 6
9712
N20
9731
D12
9792
A10
9793
J10
9797
G 9
T161
N 1
T162
G 2
T163
G 2
T164
F 2
T165
F 2
T166
F 2
T167
D 2
T168
D 2
T169
D 2
T170
M 6
T171
E12
T172
B12
T173
K18
T174
H21
T175
L18
T176
H19
T177
E 9
T178
E 3
T179
C 2
T180
L21
T181
K21
T182
G20
T183
E20
T184
M20
T185
M20
T186
M20
T187
N 6
T188
L 3
T189
D 7
T190
A12
T191
B12
T192
G19
T193
I17
T194
N18
T195
M 4
1701
K21
1702
M20
1705
A12
1706
M21
1711
E 1
1720
F 1
1730
D 1
2631
H19
2632
B19
2633
F16
2634
C16
2635
G17
2636
D17
2637
G20
2638
D20
2639
J18
2640
B18
2641
I18
2642
A18
2643
J17
2644
A17
2645
J17
2646
A17
2647
J16
2648
B16
2691
G20
2692
G19
2693
G18
2694
I16
2695
G20
2696
D20
2701
E 3
2702
D 3
2703
E 4
2704
D 4
2705
E 4
2706
D 4
2707
E 5
2708
D 5
2709
F 7
2710
D 7
2711
F 8
2712
D 8
2713
F 9
2714
C 9
2715
G 6
2716
E 6
2717
I 9
2718
B 9
2719
I 8
2720
B 8
2721
J 6
2722
A 6
2723
J 5
2724
A 6
2725
K 5
2726
A 5
2727
H 6
2728
B 6
2729
F11
2730
D11
2731
E12
2732
C12
2733
G 8
2734
D 8
2735
H 6
2737
G 9
2738
D 9
2740
J 2
2741
K 4
2752
K 4
2760
L 5
2761
D 7
2762
E 8
2763
E 8
2765
C 8
2767
N18
2780
N 4
2781
N 3
2782
N 3
2783
N 1
2784
N 1
2785
N 2
2786
J 1
2787
K 3
2788
M18
3631
H16
3632
B16
3633
H17
3634
C17
3635
H16
3636
C17
3637
H17
3638
C17
3639
H18
3640
C18
3641
H18
3642
C18
3643
H18
3644
C18
3645
G16
3646
D16
3647
G16
3648
E16
3649
G17
3650
D17
3651
G18
3652
E18
3655
J21