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M 37-DC
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
M 37-DC
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
GRUNDIG Service
GRUNDIG Service
4 - 23
4 - 24
Für die tatsächliche Bauteilbestückung ist das Schaltbild maßgebend!
The circuit diagram is relevant for the actual component assembly!
CD-Wechsler / CD Changer (CDC Board)
3104 113 3109.
12
1
1
1
1878
2865
7871
2829
2864
1876
3886
9830
2873
3888
3877
3896
6872
6874
6875
1877
3887
3899
9804
9810
9831
3880
3881
3882
3883
3884
7807
1801
2874
2875
2876
3851
3852
3878
3879
9845
9847
9848
3819
3870
3885
3891
7802
7803
1875
2816
2817
2818
3811
3812
3813
3818
2867
2869
9833
9827
9811
9825
9826
3838
6871
6873
2868
3871
2872
9809
9850
9834
7806
3853
3841
3843
3846
3847
3849
3850
3844
2809
2837
2840
2842
2843
2845
2847
7804
7805
9844
9846
9805
3822
3823
3824
3892
3893
7801
3821
2821
3810
3814
3815
3816
3817
3820
2807
2810
2812
2813
2814
2815
2819
2820
3829
3897
3889
3890
9813
9816
9832
9888
3831
3834
3835
3872
3873
3874
3876
2835
2841
2844
1800
9807
9808
9812
9849
7808
3836
3842
3845
7809
2827
2831
2836
2848
2855
9819
9841
3805
3806
3807
3808
3827
3894
9806
9820
2808
2811
3800
3802
3803
3804
2800
2801
2802
2803
2804
2805
2806
2822
3801
9838
3828
3837
3854
3869
9817
9821
9822
2850
2851
2852
9873
9818
9823
9824
9837
9876
3809
9871
7851
2858
3830
3832
3833
3839
3840
3848
3855
1810
2825
2834
2838
2839
2846
2854
2857
9843
3895
9828
9839
9870
9877
2871
2832
3825
3826
3856
1805
1881
2823
2824
2826
2828
2833
1880
1882
2853
9853
9874
9851
9854
2849
2861
2863
3859
3865
5800
3861
3860
3875
7874
9840
9852
2830
2860
2862
3858
1
7872
7800
1
2
5
6
3
4
7
HF-OUT
CDM SWITCH
O/C SWITCH
CAR-SWITCH
CAR.-MOTOR
TRAY-MOTOR
1
2
3
1
2
3
E
D
C
B
A
E
D
C
B
A
AUDIO OUT
DISC DRIVE
CDM12.1
FOCUS
TRACK
SLED MOTOR
DISC MOTOR
INNER SWITCH
IO
TTM-
TTM+
LEFT
RIGHT
FOC+
FOC-
RAD-
RAD+
SL.OUT-
SL.OUT+
-
-
-
-
-
-
-
-
-
-
-
-
-
22
23
24
25
26
27
28
L
K
J
O
I
H
G
F
E
D
C
B
A
N
M
22
23
24
25
26
27
28
GNDA
470R
3860
470R
3861
10u
2860
10u
2861
1805
14
-
1805
16
1805
13
1805
15
1801 4
1801 3
1801 5
1801 6
1801 2
1801 1
7807 -2A
TDA7073A
16
13
7806 -2B
TDA7073A
16
13
DA7073A
806 -2A
9
12
DA7073A
807 -2B
9
12
1
1800
4
1800
3
1800
2
1800
22k
3858
22k
3859
2n2
2862
GNDA
GNDA
2n2
2863
GNDA
GNDA
PULSES DURING NEXT, PREVIOUS, STOP
5V
5V
5V
5V
5V
5V
5V
5V
IN PLAY MODE
DC VOLTAGES MEASURED
7
6
5
4
3
2
7
DURING FOCUS SEARCH
1s
4V
PULSE WIDTH MODULATION
BRAKE
ACCELERATE
PULSE DENSITY MODULATION
V
VOLTMETER
ELECTRONIC
3824
M 8
3825
J 9
3826
J10
3827
H10
3829
M 8
3830
M11
3832
J17
3833
M12
3834
N15
3835
N15
3836
N15
3837
H18
3838
I18
3839
B19
3840
C19
3841
C20
3842
D19
3843
D20
3844
D20
3845
F19
3846
F20
3847
F20
3848
G19
3849
G19
3850
H20
3851
A12
3852
A21
3853
E21
3858
K23
3859
M23
3860
K23
3861
M23
3869
I20
3870
A 3
3871
C 4
3872
E 4
3873
F11
3874
E 5
3875
F 6
3876
F 7
3877
E 4
3878
E 9
3879
B11
3880
B11
3881
B11
3882
B10
3883
C10
3884
D11
3885
D10
3886
D10
3887
A 5
3888
C 4
3889
G11
3890
F11
3891
N 4
3892
M 6
3893
M 7
3894
G 9
3895
F15
3896
B 4
3897
L 5
6871
D 9
6872
D 9
6873
E 9
6874
C 9
6875
B 6
7800
H10
7801
M 4
7802
M 5
7803
M 6
7804
M 7
7805
M 8
7806
C21
7806
E21
7807
B21
7807
G21
7808
N15
7809
N14
7851
J22
7871
A12
7871
C12
7872
B 6
7874
F 6
1800
D24
1800
D24
1800
F24
1800
F24
1800
H 3
1800
H 3
1800
I 3
1800
J 3
1800
K 3
1800
L 3
1800
N 3
1800
O 3
1801
A24
1801
A24
1801
B24
1801
C24
1801
G24
1801
H24
1805
A 3
1805
A 3
1805
B 3
1805
B 3
1805
C 3
1805
C 3
1805
D 3
1805
E 3
1805
E 3
1805
F 3
1805
G 3
1805
K24
1805
L24
1805
M24
1805
O 9
1805
O14
1805
O15
1805
O15
1810
N11
1880
D 9
1881
D 9
1882
E 9
2800
H 5
2801
H 6
2802
I 5
2803
I 6
2804
I 5
2805
I 6
2806
J 6
2807
J 5
2808
J 6
2809
H21
2810
K 5
2811
K 6
2812
K 3
2813
K 4
2814
K 4
2815
L 4
2816
L 4
2817
N 5
2818
O 5
2819
M 7
2820
M 7
2821
M 6
2822
J 9
2823
J10
2824
J10
2825
J 8
2826
G10
2827
G11
2828
G11
2829
D11
2830
N21
2831
F15
2832
F16
2835
I19
2836
I19
2837
B20
2838
B19
2839
C19
2840
B20
2841
D19
2842
D20
2843
E20
2844
F19
2845
F20
2846
H19
2847
H20
2848
O14
2850
L10
2851
J20
2852
J21
2855
O21
2856
O21
2860
K22
2861
M22
2862
K24
2863
M24
2872
A 7
2873
A12
2874
B12
2875
D12
2876
A 5
3800
H 5
3801
H 6
3802
H 5
3803
H 6
3804
I 5
3805
I 6
3806
J 6
3807
J 6
3808
K 6
3810
M 4
3811
N 5
3812
N 5
3813
N 5
3814
L 5
3815
L 5
3816
L 6
3817
M 6
3818
N 6
3819
O 6
3820
M 6
3821
N 7
3822
M 7
3823
L 8
1800
C 2
1801
E 2
1805
A 1
1810
B 2
1875
E 1
1876
E 1
1877
E 3
1878
E 3
1880
A 3
1881
B 1
1882
A 3
2800
C 1
2801
C 1
2802
C 1
2803
B 1
2804
C 1
2805
B 1
2806
B 2
2807
C 1
2808
B 1
2809
D 2
2810
C 1
2811
B 1
2812
C 1
2813
C 2
2814
C 2
2815
C 1
2816
D 1
2817
D 1
2818
E 2
2819
D 1
2820
D 1
2821
C 1
2822
C 1
2823
B 2
2824
B 2
2825
B 2
2826
A 1
2827
B 2
2828
B 2
2829
E 3
2830
A 1
2831
B 3
2832
B 1
2833
B 2
2834
B 2
2835
C 3
2836
C 3
2837
D 2
2838
A 2
2839
A 2
2840
D 2
2841
C 3
2842
C 2
2843
C 2
2844
C 3
2845
C 2
2846
A 3
2847
D 2
2848
C 3
2849
A 2
2850
A 3
2851
A 3
2852
B 3
2853
A 2
2854
A 2
2855
B 3
2857
A 3
2858
A 3
2860
A 2
2861
A 2
2862
A 1
2863
A 2
2864
E 2
2865
E 2
2867
D 3
2868
D 3
2869
D 3
2871
A 1
2872
D 3
2873
E 2
2874
E 2
2875
E 2
2876
E 2
3800
C 1
3801
C 1
3802
C 1
3803
B 1
3804
C 1
3805
B 1
3806
B 1
3807
C 1
3808
C 1
3809
A 2
3810
D 2
3811
D 1
3812
E 1
3813
E 2
3814
D 2
3815
D 1
3816
D 1
3817
D 1
3818
E 1
3819
E 2
3820
D 1
3821
D 1
3822
D 1
3823
D 1
3824
C 1
3825
B 1
3826
B 1
3827
B 2
3828
B 3
3829
D 1
3830
A 2
3831
B 3
3832
B 3
3833
B 2
3834
C 3
3835
C 3
3836
C 3
3837
A 3
3838
C 3
3839
A 2
3840
A 3
3841
D 3
3842
B 2
3843
D 3
3844
D 2
3845
B 2
3846
D 3
3847
D 2
3848
A 2
3849
D 2
3850
D 2
3851
E 2
3852
D 3
3853
D 2
3854
A 3
3855
A 3
3856
A 1
3858
A 2
3859
A 2
3860
A 1
3861
A 2
3865
A 2
3869
B 3
3870
D 1
3871
D 3
3872
C 3
3873
B 3
3874
B 3
3875
A 1
3876
B 3
3877
D 3
3878
E 3
3879
E 2
3880
E 2
3881
E 3
3882
E 3
3883
E 2
3884
E 2
3885
E 2
3886
E 2
3887
D 3
3888
D 3
3889
B 3
3890
B 3
3891
D 1
3892
D 1
3893
D 1
3894
B 1
3895
B 1
3896
E 3
3897
D 1
3899
E 3
5800
A 2
6871
D 3
6872
D 3
6873
D 3
6874
D 3
6875
E 3
7800
B 2
7801
D 2
7802
D 1
7803
D 1
7804
D 1
7805
D 1
7806
C 2
7807
D 2
7808
C 2
7809
C 2
7851
B 3
7871
E 2
7872
C 3
7874
A 1
9804
E 2
9805
D 1
9806
C 2
9807
C 2
9808
C 2
9809
C 3
9810
E 3
9811
D 3
9812
C 3
9813
C 3
9816
C 3
9817
B 3
9818
A 2
9819
C 2
9820
B 2
9821
B 3
9822
B 3
9823
A 3
9824
A 3
9825
D 3
9826
D 3
9827
D 3
9828
A 1
9830
E 2
9831
D 2
9832
C 3
9833
D 3
9834
D 2
9837
A 2
9838
A 3
9839
A 1
9840
A 1
9841
C 1
9843
A 2
9844
D 1
9845
E 1
9846
C 1
9847
E 1
9848
E 2
9849
C 2
9850
D 2
9851
A 2
9852
A 1
9853
A 2
9854
A 2
9870
A 1
9871
B 3
9873
A 2
9874
A 2
9876
A 2
9877
A 1
9888
B 3
to 1806 CDC Interface
page 4 - 20