Grundig M 28-C Servicehandbuch Seite 50

Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
Schaltplan Cassettenteil / Circuit Diagram Tape Part
Teil 2 / Part 2
1 2 3 4 5
A
SELECTOR IC A
B
S3b
12 11
0V
(1701)
REC-L S4b
S2b
C
S1b
3736
14 15
0V 0V
18k
PLAY BACK
DECK A 1730
3704 S0b
16
0V
220
3
L
2
D
HEF4952BT 7710
R A
1
(1701)
REC-R A
1711
12
1
TEST
E
2
3703
CONNECTOR 0V
220
1
3 S0a
3735
0V 0V
REC/PB 4
18k
3 2
DECK B S1a
[18k]
1720
F
1 S2a
L
S4a
2 A
3701
0V 0V
220
3
5 6
S3a
R
4
13
HEF4952BT 7710
G
5
-9V
V
4
BIAS HEF4952BT EE
13 8.0V
V
+C
6 7710 DD
8
V
SS
Erase BIAS
Head A SYMM.
A A A S S S S S
2 1 0 0 1 2 3 4
3785 STOP 0 0 0 1 1 A
100k Pb deck A 0 0 1 1 1
H
Pb deck B 0 1 0 1 1
0 1 1 1 1 1
REC (line in) 1 0 0 1 1
1 0 1 1 1
Dubbing
7785 7786
1 1 0 1 1
A
J111 J111
1 1 1 1
5702 A A A S S S S S
2 1 0 0 1 2 3 4
2u2
I
10 9 7
3783 A A
(7750)
1A0
4k7
1A1
3781 (7750)
4M7
-C
6775
6774
J
1N4148
A
1N4148
7784 REC
6773 3787
3780 3779
2786 BC856B
(1702) 1M
1M 330k
100p 1N4148
-19V
2741
K
4n7
A A P
A
+12V
3762 3761
820 10k
L
P A
11.8V
7783
7782 BC848C
BC558C
11.2V
5.0V
3770 3771
BIAS
1k5 1k2
M BIAS 5701 P
2.3V LEVEL
3
4 +12V
2782
2 5
P
7781
7788
A 4n7 BC848C P
5.0V
BC848C
6776
3777 3776
2783
1 6
150R 6k8
MT 1N4148
100n
0.3V 3786
N
2k2
7780
BC848C
P P P P P P
A
1 2 3 4 5
4 - 27
M 18-C ... M 48-DC
6 7 8 9 10 11
REC.EQUALISATION
3726
0V MUTE
220k
16
S0b
2724 0V
14 15
180p S1b A
S2b
2720 3722
2718
5k6
S4b
18n
2n2
3720
2728 0V 0V
8k2 3k9
680p 12 11
S3b 3718
HEF4952BT 7730
3724
12k
LEFT CHANNEL
2765 PLAY BACK
1 7720 12
3706
0V 10 2 A
A 9.8V 0V
220 47u
EQUALISATION
9 3714
15 2714
4.8V
13
AN7318S 2k2
10u
14
3708 1
11
100 ALC
3728 2730
1.2V A
16 A 2738 5k6
3764 0V
27n
+12V 9.8V 3730
470 14
3712 0V
22n 2k7
180k
2734 3732
16
A 0V
5k6
470p
REC/Pb-AMPLIFIER
A
A
7787
3765
2762
BC848C
39k
2u2 3760
A
47k
2A2
HEF4952BT
1
(7750)
A 3705 2 7720
A A A ALC DELAY
0V 7 A 0V
220
5
8
2 2713 3713
RIGHT CHANNEL 4.8V 0V
4
AN7318S 2k2
3 10u
3707
5
6
100
ALC
1.2V 1.8V
12
0V 3727
2729
A
5k6
3763
7.3V
27n
180k 2737
A
3729
0V 3
2k7
22n
-C
3711
180k 3731
0V 1
5k6
2733
470p
A
A
3717 HEF4952BT
2727
3k9
7740
680p
HEF4952BT 7730
S3a 0V A A
3723 3719 2 1
5 6 2717
0 0
12k 8k2
0V 2n2 0 0
STOP
3721 0 1
S4a 2719
5k6 REC 0 1
S2a 18n
HS Chrome 1 0
Pb Chrome 1 0
1 1
Pb Ferro 1 1
S1a
3 2
0V
A A
2 1
10 9
S0a
3725 1
A
0V
220k
-C
4
V -9V
HEF4952BT EE
13
V +C
A 7730 DD
8
V 8.0V
SS
+C
A
A A A S S S S S
2 1 0 0 1 2 3 4
0 0 0 1 1
To 7710 NS Ferro
7730
HS Ferro 0 0 1 1 1
7740
REC MUTE 0 1 0 1 1
7760
REC MUTE 0 1 1 1 1 1
NS Chrome 1 0 0 1 1
HS Chrome 1 0 1 1 1
REC MUTE 1 1 0 1 1
1 1 1 1
A A A S S S S S
2 1 0 0 1 2 3 4
10 9 7
3A0 (7750)
3790
3A1 (7750)
47k
CR 3A2 (7750)
(1702)
REC
(1702)
6 7 8 9 10 11
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
12 13 14 15 16
3668
47k
2648
4u7
HEF4952BT 7760
S3b
12 11
3632
47k
S4b
HEF4952BT 7740 S2b
20k
S3b
7634
11
S1b BC848C
14 15
A
DECK-B L PB-LEVEL
S4b L_OUT
S0b
S2b
16 Vref
S1b
15
4640
0V
S0b
1
HEF4952BT 7760
S3a
3
5 6
7740 S4a
R_OUT
S2a
S3a
6
Vref
S1a
S4a 3 2
S2a
S0a
1
S1a
2
1
0V
4639
S0a
3667
-C
47k 3
-9V
V 4
HEF4952BT EE
V 13
+C
7760 DD 3631
-C
V 8
8.0V 47k
SS
4 -9V
V A
EE
A A A S S S S S
2 1 0 0 1 2 3 4 3635
13
V +C
DD
o/p mute 0 0 0 1 1
8.0V 20k
8
V
SS o/p mute 0 0 1 1 1
A
0 1 0 1 1 7633
BC848C
A S S S S S 0 1 1 1 1 1
0 0 1 2 3 4
0 1 1 Pb deckB 1 0 0 1 1
A
1 1 1 1 0 1 1 1 DECK-B R PB-LEVEL
Pb DCC
0 1 1 1 1 0 1 1
1 1 1 1 1 1 1 1
0 1 1 A A A S S S S S
2 1 0 0 1 2 3 4
1 1 1
0 1 1 10 9 7
1A0
1 1
A
A S S S S S
0 0 1 2 3 4
2A2 A
2647
7 4u7
2A0 (7750)
(7750)
2A1
(7750)
2A2
2A0
2A1
2A2
1A1
P
Note: Deck A = Deck 1
3A2
Deck B = Deck 2
3A1
3A0
1A0
12 13 14 15 16
GRUNDIG Service 4 - 28
17 18 19 20 21
3666 3664 3662
Required for sets
82k 180k 470k
with Dolby only
2646 2642 3660
Vref
33k
Vref
10p 4u7
7640
6.2V
REC-LEVEL-L
1 NJM4560
6
2
7
3658
5
6.1V
1k
4
6.2V
A
2632
47n
3636 3634 3642 3640
3k3 20k 3k3
3638 3644
1A0
1A1
7632
47k 47k
BC848C
(7750) (7750)
A
DECK-A/DCC L PB-LEVEL
(7750)
2A2
A A
A
6
3652
6.1V
1k
4 16 15 14 13 12 11 10 9
5632
CXA1101M
7630
6
2 4 5 6 7 8
1 3
3651
1k
4
5631
+12V
3694
A
10R
2631
A
A
47n
3641
3633 3639
DOLBY A
3k3 20k 3k3 (1706)
Vref
3637 3643
1A1 7631 1A0
47k 47k
BC848C To:3655 3660
(7750)
(7750) 3656 5631
A 3659 5632
DECK-A/DCC R PB-LEVEL
+12V
3695 3693
68R 68R
2641 3659
Vref
6.2V
7640 8 33k
1
REC-LEVEL-R
NJM4560 4u7
2 2
1
3657
3
6.1V
1k
6.2V
2645
10p
3665 3663 3661
82k 180k 470k To 56 AF
Vref
page 4-45
page 4-49
1701
To 7710 7730 -C
10 3768
7740 7760 10k
1 -CMOS
3746 3781
4k7 2
TAPE-L
3745
4k7 3
TAPE-R
To: 3693 3764 6770
+12V 4 +12V
3694 3778
3762 3789
5
GND A
A
11
A A To 3736 6 REC-L
To 3735 7 REC-R
1706
1
STROBE
2 DATA
3
CLK
P
P 4
7750 To 3779 GND P
6774
HEF4094BT
3786 5 REC
+12V
6
To 3790 CRO2
3767
To 3690 7 DOLBY
330R
5.1V
To 22 Front
page 4-14
page 4-20
P P
17 18 19 20 21
M 18-C ... M 48-DC
Bauteile X Y 3717 H 9
Components 3718 B 9
3719 I 8
3720 B 8
1701 K 21
3721 I 8
1702 M 20
3722 B 9
1705 A 12
3723 I 6
1706 M 21
3724 B 6
1711 E 1
3725 J 6
1720 F 1
3726 A 6
1730 D 1
3727 F 10
2631 H 19
3728 D 10
2632 B 19
3729 G 10
2633 F 16
3730 D 10
2634 C 16
3731 G 10
2635 G 17
A
3732 D 10
2636 D 17
3733 F 4
2637 G 20
3734 D 3
2638 D 20
3735 E 3
2639 J 18
3736 C 3
2640 B 18
3743 L 17
2641 I 18
3744 L 18
2642 A 18
3745 L 17
2643 J 17
3746 K 17
2644 A 17
3760 E 9
2645 J 17
B 3761 L 5
2646 A 17
3762 L 3
2647 J 16
3763 F 7
2648 B 16
3764 D 7
2691 G 20
3765 E 8
2692 G 19
3766 E 9
2693 G 18
3767 N 19
2694 I 16
3768 K 20
2695 G 20
C 3769 M 5
2696 D 20
3770 M 2
2701 E 3
3771 M 3
2702 D 3
3772 M 4
2703 E 4
3773 L 4
2704 D 4
3774 L 4
2705 E 4
3775 N 3
2706 D 4
3776 N 3
2707 E 5
3777 N 2
D
2708 D 5
3778 L 2
2709 F 7
3779 J 3
2710 D 7
3780 J 2
2711 F 8
3781 J 2
2712 D 8
3782 I 1
2713 F 9
3783 I 1
2714 C 9
3784 H 2
2715 G 6
3785 H 2
E
2716 E 6
3786 N 6
2717 I 9
3787 J 4
2718 B 9
3788 J 4
2719 I 8
3789 N 5
2720 B 8
3790 M 6
2721 J 6
4593 F 12
2722 A 6
4637 E 14
2723 J 5
4638 B 14
2724 A 6
F
4639 G 14
2725 K 5
4640 D 14
2726 A 5
4643 B 9
2727 H 6
4644 A 6
2728 B 6
4799 K 6
2729 F 11
5631 G 17
2730 D 11
5632 E 17
2731 E 12
5701 M 1
2732 C 12
G
5702 I 3
2733 G 8
5703 J 2
2734 D 8
6760 N 18
2735 H 6
6770 L 2
2737 G 9
6771 L 2
2738 D 9
6772 K 1
2740 J 2
6773 J 2
2741 K 4
6774 J 3
2752 K 4
H
6775 J 4
2760 L 5
6776 N 4
2761 D 7
6777 L 4
2762 E 8
7630 F 18
2763 E 8
7631 H 17
2765 C 8
7632 C 17
2767 N 18
7633 H 16
2780 N 4
7634 C 16
2781 N 3
I 7640 J 17
2782 N 3
7640 A 17
2783 N 1
7710 G 5
2784 N 1
7710 D 5
2785 N 2
7710 G 4
2786 J 1
7720 E 7
2787 K 3
7720 C 7
2788 M 18
7730 H 7
3631 H 16
J 7730 B 7
3632 B 16
7730 K 7
3633 H 17
7740 C 12
3634 C 17
7740 H 11
3635 H 16
7740 E 12
3636 C 17
7750 N 17
3637 H 17
7760 E 14
3638 C 17
7760 H 13
3639 H 18
7760 B 14
K
3640 C 18
7780 N 5
3641 H 18
7781 N 3
3642 C 18
7782 L 2
3643 H 18
7783 L 3
3644 C 18
7784 J 2
3645 G 16
7785 I 2
3646 D 16
7786 I 3
3647 G 16
7787 E 9
L 3648 E 16
7788 N 6
3649 G 17
9712 N 20
3650 D 17
9731 D 12
3651 G 18
9792 A 10
3652 E 18
9793 J 10
3655 J 21
9797 G 9
3656 B 21
3657 J 19
3658 B 18
M
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
N
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
GRUNDIG Service