Etage De Traitement Du Signal - Télétexte "Dos" (Txt) - Grundig TVR 3710 FR Manuel D'instructions

Circuits imprimés et schémas électriques / Layout of PCBs and Circuit Diagrams
Etage de traitement du signal – Télétexte "DOS" (TXT)
Signal Chassis – Teletext "DOS" (TXT)
1
IC7880: Only for 1 Frontend (Tuner) Version
IC7881: Only for 2 Frontend (Tuner) Version
A
B
5DDA 5DDA
C
4,9V
2,2V
7882
BC848B
1,9V
D
GNDTXT
5DDA
E
2,2V
1,6V
7883
BC858B
F
GNDTXT GNDTXT
not used
G
H
I
to TV-Part
J
1
4 - 58
2 3
5DDA
3880
2885
5881
3k3
4u7
1n
2887
100n
2888
GNDTXT
3881
100n
27k
GNDTXT
5DDA
GNDTXT
GNDTXT
2890
100n
3884
100E
3885
100E
for SAA5281 only
7884
GNDTXT
not used
2 3
Reference CO .............P 4-43
AL ..............P 4-65 DE..............P 4-49
BUPI ..........P 4-68 IO...............P 4-59
4 5
from TV
5DDA 5DS
2880
5880
10u
100n
2881
47u 16V
GNDTXT
4,9V
4,9V
1 1 10
VDD1 VDD2
2,1V
2 2
OSCOUT
3,6V
3
3
OSCIN ic1
ic2
0V
4 4
OSCGND ic3
4,9V
6 6
REF+ ic4
2,1V
7 7
BLACK ic5
2,5V
9 9
IREF ic6
ic7
0V
11
11
POL
ic8
4,9V
13 13
VCR/FFB ic9
1,9V ic10
18 18
RGBREF
ic11
21
ODD ic12
22
Y ic13
ic14
2,2V
8 8
CVBS
ic15
0V
19 19
BLANK SDA
0V
15 15
R SCL
0V
16 16
G Y
0V
17 17
B ODD
COR
23
7881
SCL
SAA5254
24
SDA
2,2V
12 12
STTV/LFB
0V
5 5
VSS1
VSS2 VSS3
14 20
SAA5281
0V
0V
7880
14 20
4085
0E
for SAA5281 only
GNDTXT
4 5
TVR 3710 FR, TVR 5100 FR, TVR 5500 FR
OHA...........P 4-69 TU2............P 4-55 TXT............P 4-58
PLSP .........P 4-19 Tube PCB ...P 4-33 VS..............P 4-61
PSSP2 .......P 4-37 TV ..............P 4-51
6 7
2882
100n
GNDTXT
48
40
47
39
38 46
37 45
36 44
LINE23
35 43
34 42
33 41
32 40
31 39
30 38
29 37
CLK-O/P
28 36
CLK-EN
35
27
26 34
25 33
ic13
5V
24 32
ic14
5V
23 31
ic15
22 30
ic16
21 29
ic17
0V
28
ic18
27
ic19
26
ic20
VSS3
25
9215
for SAA5254 only
6 7
GRUNDIG Service
1800 C 3
2880 A 5
2881 A 5
2882 A 6
2883 C 4
2884 C 4
2885 C 3
A
2886 B 2
2887 C 3
2888 C 4
2889 E 2
2890 E 3
2891 H 4
2893 F 1
2894 F 1
3799 F 1
3880 C 3
3881 D 4
B
3882 C 1
3883 D 1
3884 G 3
3885 G 4
3886 G 4
3887 H 7
3888 I 7
3889 E 1
3890 C 2
3896 H 4
C
3897 H 3
4085 H 5
4086 H 7
4088 H 5
5880 A 6
5881 C 4
5882 G 1
7880 H 5
7881 G 5
7882 D 2
D
7883 F 1
7884 H 4
9118 G 1
9215 H 6
E
F
G
H
I
J