Grundig GV400 Servicehandbuch Seite 47

www.freeservicemanuals.info
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
Chassisplatte / Family Board – Video/Chroma, In/Out (VSIO)
1 2 3
A
5VL2
DTA124EK
7037
B
3001
C
470E
D
E
F
5VL2
G
H
5VL2 5VL2
4.8V
DTA124EK
3951
0E
7004
0.4V
4.6V
I
5VL2 5VPB1
J
5017
56u
K
5VL2
L
3.0V
3.0V
3033
3.4V
5025
3.4V
1k
27u
2% 2%
7006 2095
BC858B
47p
2.4V
M
2.8V
2% 2%
4.8V
0V
N
13
LM339
7053
O
...V MEASURED IN PLAYBACK MODE
...V MEASURED IN RECORD MODE
P
.. OSCILLOGRAMS
1 2 3
4 - 12
4 5 6 7 8
Y REC LPF
5004
15u
2002 2004
5VL2
180p 18p
3030
2k2
E/E LEVEL
2010
11
1n
12 13
2.2V 0.6V 3.0V 3.3V 1.4V 3.1V 0.6V 4.8V 2.0V 0V
42 41 40 39 38 37 36 35 34 33
ROTARY
DO BGP VCC1
R
STOP
VIDEO
INSERT
1/2fH AGC VIDEO AMP
R P
SHIFT DET AGC W/D
CLIP
FBC
P
FM MOD
-6dB LPF
Y/C
DOUBLE DO
MIX
DELAY CLAMP
LIM DET
7051
FM
LA 7191 6dB CLAMP
DEMOD
SUB
6dB
LPF
CHROMA
N
+ NL
DE EMPH
DOC
CLAMP CORR -
+
3.5MHz
LIM K
LPF
- P
+ +
R
P R
+
MAIN
DE EMPH R
W/D
CLIP
MAIN NL DETAIL
VCA
CLAMP
EMPH EMPH ENH
P R
LP/SP
GND
2%
1 2 3 4 5 6 7 8 9 10
3021
0V 0V 2.4V 2.5V 2.4V 2.7V 2.1V 3.7V 2.1V
2k7
2.9V 4.2V
2.1V 19 20
2097
2.4V
17 4.2V 2%
18
2%
7007
BC848B
8.0V 2.4V 1.9V
8 7 6
5VL2 5VPB1
2.3V
COMP CLK VIDEO
IN
2.7V
MSM 7403 RS
0.6V
4.8V
7504
7053
0V
0V
LM339
14
2.0V
8 5 2
VDD VSS VCC
5VL2 1.2V
9 4
LM339 1 2 3
4.8V 4.8V
7053
3
5VL2
11
1.2V
6 1 0V
LP
7
12 10
LM339
1.2V
0.4V 7053
4 5 6 7 8
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
9 10 11 12 13 14
BC848B
7001 COMBFILTER
only for Secam
3063
2061
2 3
270E
1n
CF873
1 4
1603
5VL2
4.8V
2.3V
7016
BC848B
2063
1.6V
1n
5VL2
2099
1n
3008
22k
14
15 16
0.5V 2.4V 4.2V 3.0V 4.8V 1.9V 2.3V 3.3V 3.3V 0V
32 31 30 29 28 27 26 25 24 23 22
FILTER
VCC2
SELECT
4.2V P/S
REF DET 321xfH SIDEL.
VCO DET
P
PB-AMP KIL DET
ID DET ID
KILLER S BGP
1/2
P R
B.G
B.DEEM
o
90
1/2H
SYNC
KILL
BGP GEN
LP
SYNC
SYNC
P
SEPA SP
BGP
P BGP1 BGP2
B.G
R
PICTURE R PAL
P
CONTROL
P 4PHASE
4.43M SW
R
BPF ID SHIFTER
R
WIDE
B.G
NOICAN
VIDEO 5.06M
SUB
DIV
R P BPF CONV
R
ACC
BURST MAIN
AMP EMPH CONV
P
3RDLOCK
PROTECT
ACC
BALANCER
DET
XO
- 1MHz
LPF
6dB
P R R P
KILL BGP VXO
P R
X 2
NOICAN
ADJ
11 12 13 14 15 16 17 18 19 20 21
2.1V 1.2V 1.6V 2.9V 2.5V 2.2V 3.6V 3.1V 2.0V 4.8V
2.8V 2.2V 2.2V
1601
21
5VL2
4.43MHz
3136
5VPB1
5VL2
5 1.9V
to Head amplifier L6
DTA124EK
VOB
7038
1H CCD
5VL2
VIDEO
OUT
F5
4.8V
4 5VL2
7032
4.8V
BC848B
3.3V
2.4V
7031
3043
2.6V
5016 5015 BC848B
560E
27u 56u
1.8V
5VAS
9 10 11 12 13 14
GRUNDIG Service-Technik 4 - 12
15 16 17 18 19
5VPB1
7036
2068 0.6V
BC848B 3.0V
5008
68p
8u2
0.3V
0V 0.6V
2.2V 2069 2071 2072
3.2V 3.8V 0.6V
7019
2.2V BFS19
27p 47p 1n
7017 0V 5013 3070
0V
1.2V 7018
15u 390E
BFS19
BF824 1.4V
3068
2066
0V
1k 0V 0V
0.5V 27p
1.2V 1.5V
0V
2211
47p
0V
7020
DTC124EK
only for Longply
FM PROCESSING
5VL2 5VPB
CHR PB LPF
0.6V
3132
4.8V
0.5V
680E
3.1V
2106
7025 0.5V
BC848B
3.1V
0.2V 15p
3089
1.6V 2080
0.5V 5023
7026
1k
2.5V BC848B 330u
1n
2101
0V
120p
1.1V
LUMINANZ
WRITING CURRENT
3097 3096 3100 3099
3k3 10k 1k 2k2
5VL2
CHROMINANCE
WRITING CURRENT
4.8V
1.3V
7030
1.3V
BC848B
0.7V
7029
BFS19 0.7V
3105
1k2
2000
33p
0.4V
6 4
GND
LA7311
B.G
7505
5 1
4.2V
3087
1M
9011
-28V1 5VA
ENVC TRIV HSC HP1 LP CSYNC FFP ESPBH IPBV I8SC112 CROT MODON SCL SDA DO -28V1 5VA
TO DE
15 16 17 18 19
It`s Free
20 21 22 23 24
3076 FMPV
330E
LP
FMPV
FMR
3309
100E
FMRV
SCL
3308
100E
SDA
VPS
+5D
330
1
2300
27p
3300
2301
2.5V 2.5V 0V 0V
3k3
8 10 12 2 14 16
33n
VSB1
DEM PK DET
VCC
-7V
3 7 9 11 13 15
5.0V 5.0V 0V
5VL2
SEC BG DETEKTOR
+5D +12A
+5D AFV VFV +12A
TO FV
20 21 22 23 24
GRUNDIG Service-Technik