Grundig GV 27 Servicehandbuch Seite 43

1 2 3 4
+5AS
B
2727
47u
2728
C
100n
36
2729 2,5V
33
10u
D
3715
2,4V
34
10k
2731 2,4V
35
10u
GNDA2
37
GNDA2 DEMO
5V
5704
E 26
24
GNDA1 GNDA1 GNDA1
F
3701
2,5V
29
100E
DET
2,5V
28
32
G
GNDA1
101
H
GNDA1
GNDA2
+5AS
I
12SW
+5D
J
GNDA GNDD
GNDA
GNDA
K
TO QMB 1975 (FV)
1 2 3 4
5 6 7
+5ASS
+5ASS
7700
SAA7284ZP/M2
GNDD
25 27 21 20 51 49 50 47 52 1 45 18 19
IIC
CARRIER
VCO
NICAM
DECODER
+
CONTROLLER
BIT RATE
PHASE DET
CLOCK
DATA SLICER
RECOVERY
OSC
8.192MHZ
30 31 23 22 39 48 43 40 41 42
2709
1,6V
100p
GNDA2
3703
100k
GNDA2 GNDA2 GNDA2 GNDA2 GNDA2 GNDA2 GNDA2
Reference
Oscillograms ....4-38
AF....................4-29
5 6 7
8 9 10 11
2725
5707
1u
GNDD
GNDA
2 17 16
a
102
DAC
2,5V
15
L
5V
3
2,5V
5
DIGITAL
2,5V
11
FILTER
0V
+
4
J17
38
NC
DAC GNDA GNDA
2,5V
DIGITAL
8
R
13
NC
102
14
a
NC
NC NC
44 46 12 7 6 9 10
+5ASS +5D
GNDA
GNDD
AL ....................4-25 FV....................4-21 IO.....................4-27 QMB ................4-15
DC ...................4-35 FM ...................4-24 OS ...................4-24 QNIC ...............4-36
DE ...................4-33 HA ...................4-30 PS....................4-31 VP....................4-24
8 9 10 11
12 13 14
2723
2n2
7701
3708 3707
2,5V 3
LM358N
1
2k2 3k9
2
5705
2,5V
GNDA
GNDA
GNDA GNDA GNDA GNDA 3704
2720
2n2
2k2
12SW
7701
3705 LM358N
2,5V 5
8
7
3k9
6
4
GNDA
2,5V
GNDA
GNDA
...
OSCILLOGRAMS
VS....................4-25
VS-S ................4-28
..V
MEASURED IN PLAYBACK MODE
... chip components
12 13 14
15 16
1700 J 2
1710 H 7
1970 K 2
2700 G 1
2701 G 2
2703 H 3
2704 H 4
B
2705 H 5
2706 H 5
2707 H 6
2708 H 6
2709 G 7
2710 H 8
2712 F12
2713 F11
2714 F11
2716 F12
C
2718 F12
2719 G14
2720 F14
2721 J 3
2722 E14
2723 D14
2725 B 8
2726 C 6
2727 C 3
2728 C 3
D
2729 D 2
2731 D 2
2732 H 6
2733 E 2
2734 E 2
2736 J 1
5V
2752 H 9
2753 C 9
3700 G 2
3701 F 2
E
3702 G 6
3703 H 7
3704 F13
3705 G13
3707 D13
3708 D13
3710 B 8
103 3711 C 7
3712 C 6
3713 C 6
F
3714 C 5
3715 D 3
3720 H15
3721 G15
3722 E15
3723 E15
5700 H 7
5703 B 4
5V
5704 E 2
5705 E13
G
5706 H 9
5707 B 9
6700 H 7
6701 B 7
7700 C 7
7701 D14
7701 G14
H
I
J
K
QNIC(40523)
15 16