Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
M 18-C … M 48-DC
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
M 18-C … M 48-DC
GRUNDIG Service
GRUNDIG Service
4 - 27
4 - 28
Schaltplan Cassettenteil / Circuit Diagram Tape Part
Teil 2 / Part 2
6.2V
6.2V
6.1V
6.1V
0V
6.0V
1.2V
5V
6.2V
0.4V
6.2V
6.1V
12V
6.0V
6.1V
0V
6.2V
0.4V
6.2V
8.0V
-9V
6.1V
6.2V
6.2V
5.1V
Note: Deck A = Deck 1
Deck B = Deck 2
-9V
8.0V
0V
0V
0V
0V
0V
0V
0V
0V
1.8V
1.2V
4.8V
1.2V
9.8V
9.8V
7.3V
0V
4.8V
0V
0V
0V
0V
0V
0V
0V
0V
-9V
8.0V
0V
0V
0V
0V
5.0V
0.3V
2.3V
11.2V
5.0V
11.8V
-19V
8.0V
-9V
0V
0V
0V
0V
0V
0V
0V
0V
0V
12
13
11
10
o/p mute
o/p mute
Pb Ferro
Pb Chrome
REC
HS Chrome
STOP
2
1
1
2
REC MUTE
REC MUTE
Pb DCC
Pb deckB
NS Ferro
HS Ferro
REC MUTE
NS Chrome
HS Chrome
Dubbing
REC (line in)
Pb deck B
Pb deck A
STOP
1
2
1
2
TAPE-L
(7750)
(1706)
(7750)
(7750)
(7750)
(7750)
(7750)
(7750)
(1702)
(1702)
7760
(1702)
REC-R
To 7710 7730
Qs'
STR
D
ATA
CLK
Vcc
E0
Q4
Q5
Q6
Q7
Qs
Q0
Q1
Q2
Q3
Vss
3786
6774
To 3779
To 3790
To 3690
(7750)
(7750)
(7750)
(7750)
(1701)
(1701)
(7750)
(7750)
REC
CRO2
DOLBY
GND P
STROBE
DATA
REC-L
GND A
+12V
TAPE-R
TAPE-L
-CMOS
To
To 3735
To 3736
MUTE
REC.EQUALISATION
R_OUT
L_OUT
BIAS
REC/Pb-AMPLIFIER
ALC DELAY
ALC
ALC
SELECTOR IC
TEST
PLAY BACK
DECK A
REC/PB
DECK B
L
R
Erase
Head
LEFT CHANNEL
RIGHT CHANNEL
CONNECTOR
BIAS
Line Out R
Time Const.R
On/_Off
Pb/_Rec
Time Const.L
Line Out L
VCC
Rec In L
Pb In L
Vref
GND
R-Ref
.
Rec Out L
Rec Out R
Pb In R
Rec In R
PLAY BACK
EQUALISATION
To:3655
3656
3659
3660
5631
5632
7710
To: 3693
3694
3762
3764
3778
3789
REC-LEVEL-R
REC-LEVEL-L
DECK-A/DCC R PB-LEVEL
DECK-B R PB-LEVEL
DECK-B L PB-LEVEL
DECK-A/DCC L PB-LEVEL
BIAS
LEVEL
BIAS
SYMM.
7730
7740
Required for sets
6770
CLK
(7750)
7740 7760
3781
with Dolby only
L
R
[18k]
100n
2783
1n
2788
2760
100n
180p
2724
220p
2725
220p
2726
18n
2644
10p
2646
100p
2640
47n
2632
47n
2631
3n3
2635
3n3
2636
33n
2787
22n
2752
2727
680p
2728
680p
100n
2735
33n
2721
27n
2729
330p
2709
2n2
2717
100p
2711
33n
2722
27n
2730
100p
2786
2710
330p
330p
2706
2n2
2718
100p
2712
180p
2723
18n
2719
18n
2720
2701
100p
100p
2704
100p
2702
470p
2708
2703
100p
2705
330p
2707
470p
2784
15n
4n7
2782
2781
10n
680n
2638
680n
2637
100p
2639
10p
2645
18n
2643
220n
2634
220n
2633
2733
470p
2737
22n
2738
22n
2734
470p
22n
2740
4n7
2741
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
8
9
10
11
12
13
14
15
16
17
18
2
19
20
21
3
10k
3691
43k
3692
10k
3690
470
3764
180k
3763
3766
4M7
39k
3765
220k
3726
82k
3666
180k
3664
470k
3662
33k
3660
1k
3658
47k
3644
47k
3638
47k
3632
47k
3631
3k3
3647
1k
3651
5k6
3649
3k3
3648
1k
3652
5k6
3650
3779
330k
3784
15k
820
3762
10k
3761
3782
4k7
3777
150R
1M
3788
3723
12k
5k6
3721
3724
12k
5k6
3722
5k6
3772
3734 4k7
1k8
3715
100
3707
3k9
3717
180k
3711
5k6
3727
2k7
3729
5k6
3731
22R
3709
2k2
3713
1k8
3716
100
3708
4k7
3733
1M
3780
3k9
3718
180k
3712
5k6
3728
2k7
3730
5k6
3732
22R
3710
8k2
3720
2k2
3714
1M
3787
3771
1k2
8k2
3719
3706
220
220
3705
220
3704
220
3702
220
3703
220
3701
3786
2k2
3776
6k8
3775 4R7
3770
1k5
3789 22k
8k2
3774
1k
3657
33k
3659
470k
3661
180k
3663
82k
3665
3725
220k
3k3
3640
3k3
3634
47k
3643
47k
3637
3k3
3639
3k3
3633
18k
3736
18k
3735
68R
3695
68R
3693
4M7
3781
39k
3646
39k
3645
4k7
3746
4k7
3745
3783
4k7
47k
3760
3790
47k
3769 10k
3767
330R
1k8
3743
1k8
3744
3768
10k
47k
3668
47k
3667
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
P
P
P
A
P
A
P
P
P
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
A
A
A
P
P
P
A
A
A
A
A
A
A
5703 2u2
5702
2u2
10R
3694
3778 6R8
4640
4639
6
5
3
2
1
1720
4
7
1
1706
2
4
5
6
7
6
5
4
3
2
1
1701
3
4
3
2
1
1711
3
1730
2
1
2780
22u
10u
2767
100u
2692
4u7
2691
100u
2693
2761
220u
2765
47u
2763
100u
2762
2u2
4u7
2648
4u7
2642
1u
2785
100u
2715
10u
2713
100u
2716
10u
2714
100u
2694
4u7
2641
4u7
2647
2695
2u2
Vref
DOLBY
+12V
+12V
+12V
+C
Vref
Vref
Vref
+C
+C
+12V
CR
+12V
Vref
Vref
Vref
+C
+12V
-C
-C
-C
-C
+C
-C
REC
REC
+12V
-C
2A2
3A1
2A2
2A1
2A0
1A1
1A0
1A1
1A0
3A2
3A1
3A0
2A2
2A1
2A0
1A1
1A0
REC-L
REC-R
1A0
1A1
1A0
3A2
3A0
2A2
2A2
7632
BC848C
7634
BC848C
7781
BC848C
BC848C
7783
BC848C
7780
7631
BC848C
7633
BC848C
7787
BC848C
BC848C
7788
HEF4952BT
7760
1
2
3
5
6
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7740
1
2
3
5
6
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7730
5
3
1
6
2
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7710
5
3
1
6
2
S4a
S0a
S1a
S2a
S3a
HEF4952BT
7760
11
12
14
15
16
S4b
S0b
S1b
S2b
S3b
HEF4952BT
7740
11
12
14
15
16
S4b
S0b
S1b
S2b
S3b
HEF4952BT
7730
11
12
14
15
16
S4b
S0b
S1b
S2b
S3b
HEF4952BT
7710
15
11
12
14
16
S4b
S0b
S1b
S2b
S3b
6774
1N4148
6775
1N4148
6772
1N4148
6771
1N4148
6773
1N4148
6776
1N4148
6770
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
HEF4952BT
7710
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
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
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
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
5V1
6760
BZX79
7750
HEF4094BT
16
15
14
13
12
11
10
98
7
6
5
4
3
2
1
20k
3635
20k
3641
20k
3642
20k
3636
100k
3785
4k7
3773
4k7
3655
4k7
3656
BC856B
7784
BC558C
7782
6777
8V2
5701
1
2
3
4
5
6
MT
NJM4560
7640
8
2
3
1
NJM4560
7640
4
5
6
7
5631
3
4
1
6
5632
3
4
1
6
J111
7786
J111
7785
To 56 AF
page 4-45
page 4-49
To 22 Front
page 4-14
page 4-20
Bauteile X
Y
Components
1701
K
21
1702
M
20
1705
A
12
1706
M
21
1711
E
1
1720
F
1
1730
D
1
2631
H
19
2632
B
19
2633
F
16
2634
C
16
2635
G
17
2636
D
17
2637
G
20
2638
D
20
2639
J
18
2640
B
18
2641
I
18
2642
A
18
2643
J
17
2644
A
17
2645
J
17
2646
A
17
2647
J
16
2648
B
16
2691
G
20
2692
G
19
2693
G
18
2694
I
16
2695
G
20
2696
D
20
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
F
11
2730
D
11
2731
E
12
2732
C
12
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
N
18
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
M
18
3631
H
16
3632
B
16
3633
H
17
3634
C
17
3635
H
16
3636
C
17
3637
H
17
3638
C
17
3639
H
18
3640
C
18
3641
H
18
3642
C
18
3643
H
18
3644
C
18
3645
G
16
3646
D
16
3647
G
16
3648
E
16
3649
G
17
3650
D
17
3651
G
18
3652
E
18
3655
J
21
3656
B
21
3657
J
19
3658
B
18
3659
I
19
3660
A
19
3661
K
18
3662
A
18
3663
K
17
3664
A
17
3665
K
17
3666
A
17
3667
G
14
3668
A
14
3690
H
19
3691
D
20
3692
D
19
3693
I
18
3694
G
18
3695
I
17
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
D
10
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
F
10
3728
D
10
3729
G
10
3730
D
10
3731
G
10
3732
D
10
3733
F
4
3734
D
3
3735
E
3
3736
C
3
3743
L
17
3744
L
18
3745
L
17
3746
K
17
3760
E
9
3761
L
5
3762
L
3
3763
F
7
3764
D
7
3765
E
8
3766
E
9
3767
N
19
3768
K
20
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
F
12
4637
E
14
4638
B
14
4639
G
14
4640
D
14
4643
B
9
4644
A
6
4799
K
6
5631
G
17
5632
E
17
5701
M
1
5702
I
3
5703
J
2
6760
N
18
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
F
18
7631
H
17
7632
C
17
7633
H
16
7634
C
16
7640
J
17
7640
A
17
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
C
12
7740
H
11
7740
E
12
7750
N
17
7760
E
14
7760
H
13
7760
B
14
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
N
20
9731
D
12
9792
A
10
9793
J
10
9797
G
9