Grundig GV 27 Servicehandbuch Seite 35

GV 27 ..., GV 47 ..., GV 7...
Reference
Oscillograms ....4-38
AF....................4-29
25 26 27 28 29
3780
SDA
1 I2C Bus
Control
100E 5,1V
2780
10u
2
4,1V
16V
2781
3
10n 3,4V
27
25V
3922
2782
GNDA 4
2,6V
0E 100n
delete for TDA9800T MONO 2Scart 25V
2783
5
for TDA9800T MONO 2Scart only
820p
2,6V
12SW VDD
25V
2%
6 Ref.
Vref
Voltage
2,6V
3723 3790
2786
7 L+R
220k 4k7 4u7 2,6V
16V
2752
7725
2787
BC847B 8 2R
220n
(Buffer)
4u7 25V
25V 2,6V
GNDA
* 2791
9
4u7
2,6V
16V
3792
GNDA * 2792
10
4k7 4u7 2,6V
16V
Vref
*
GNDA
*
GNDA
VASW
5VASW 5VD GNDA 12SW GNDA
28
GNDA
1,9V
7723
BC857B
(Buffer)
1970
(QNIC)
GNDA
...
OSCILLOGRAMS
...V MEASURED IN PLAYBACK MODE
chip components
...
C DK,K'
= H
DK = L
TO CINCHIN TO CINCHREAR
VFV
to IO
25 26 27 28 29
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
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
30 31 32 33 34
B
C
AFC
to DE/DC
SDA
D
to/from DE/DC
SCL 3781
20
SCL
5,2V 100E
from DE/DC
Logic Ctrl
1781
19
Osc.
PLL
Integr. 5VASW
3,4V 10MHz E
Demod.
GNDA
18
VDD
Vref 5,2V
17 2789
2,6V
10n
GNDA
25V
F
16
GND
0V
GNDA
15 2790
Level
Ctrl
Adj.
2,6V
10n
25V
2L/A/MONO
14
x2
2,6V
G
2R/B
13
2,6V
12
H
11
7780
TDA9840T/V2
(Stereodecoder)
FM STEREO only
I
* 3985
AF2
0E to AF
* 3984
AF1
0E to AF/IO
91
2796
J
4u7 16V
for mono only
K
L
5VASW
5VASW
12SW from PS
M
12SW
from PS
5VA
5VA
N
from PS
33V
33V
from PS
O
GNDA
P
FV(40393)
30 31 32 33 34
GV 27 ..., GV 47 ..., GV 7...
VS....................4-25 Chassisplatte / Chassis Board – OSD (OS), Follow-TV (FM), VPS/PDC (VP)
VS-S ................4-28
1701 K 3 3923 J24
1719 E15 3924 P 5
1720 H14 3925 G23
1721 I14 3926 I24
1722 M14 3950 N16
1740 N19 3972 G16
1745 K22 3973 L21
1746 L22 3984 I30
1747 M22 3985 I30
1748 K22 3986 M23
1781 E33 3988 E21
1908 P11 3989 L16
1910 P10 3990 D21
1975 K30 5700 K 5
2700 K 4 5702 P 4
2701 P 4 5703 J 4
2702 P 6 5705 P 7
2704 K 3 5720 M 8
2705 P 5 5721 L10
2706 L11 5725 E20
2707 M11 5726 K17
2708 K 6 5740 M20
5741 M19
2710 P 7
2715 O 8 5780 F28
2716 O 8 6760 E14
6761 F14
2722 K10
2723 N15 7720 G17
2726 H24 7721 F21
2727 G23 7722 O22
2728 H24 7722 O19
2729 I25 7722 P21
2730 K22 7723 K25
2731 L22 7724 M17
2732 M22 7725 G26
2733 M23 7726 C20
2734 K25 7728 M13
7729 G14
2735 K22
2740 N18 7730 F14
2741 K19 7731 N16
2742 L17 7780 H30
2743 I23 9005 O 9
2744 I24
2745 M20
2746 E17
2747 F23
2748 E19
2749 E17
2750 E17
2751 K17
2752 G25
2753 D14
2780 E28
2781 E28
2782 F28
2783 F28
2784 E27
2785 F28
2786 G28
2787 G28
2788 E33
2789 F33
2790 F33
2791 H28
2792 H28
2793 M19
2794 P 6
2795 K10
2796 J31
3702 N 9
3703 O 9
3704 I16
3705 P 6
3706 J16
3707 M 9
3708 M 9
3709 L10
3712 L13
3715 M13
3723 G25
3725 J 5
3726 K 7
3729 H26
3730 E24
3731 F24
3732 E17
3735 E17
3736 H25
3737 G24
3739 G26
3742 K17
3744 O17
3747 N20
3748 D21
3749 M20
3750 N20
3760 K23
3761 K25
3762 L24
3764 K24
3765 M23
3766 E13
3767 F13
3768 G13
3769 E14
3770 F14
3771 E14
3772 O23
3773 L12
3780 D28
3781 D33
3782 G28
3790 G27
3791 G27
3792 H27
3793 H27
3910 K18
3911 K18
3912 K19
3913 K19
3914 J 2
3915 M19
3916 M21
3917 N22
3918 J22
3919 J17
3922 F25
4 - 23 GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
4 - 24