Service manual

GV 30…, GV 50…
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
GV 30…, GV 50…
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
GRUNDIG Service
4 - 9
GRUNDIG Service
4 - 10
TB-2 (JK881)
VD IN F
Q1301/Q1303
Q1302
TO SY-A
H AMP SW
RF SWP
YCA AD MUTE
TP183
ENV SW
CH2
LP,EP HEAD
ONLY FOR LP
CH1
VIDEO(AUOID) PROCESS
BUFFER
Q1203
(SYNC)
SWD5V
L
H
TO SY-A,IC121
DPC DXMIN H
Q3109
Q3110
SECAM SUPERIMP H
BPF
TO TB-1
IC307
AV1 SYNC
TO IC141
VPS/PDC
Q1202
SW
Q1011
TO SY-A
ALTOFF H
SW
FILTER
DET
APC
62
Q3108
Q3106
Q1010
Q3107
Q1008
INT SYNCH
BUFFER
BUFFER
MUTE
VIN_F
50
TO IC101PIN28
C SYNC
Q1206
PBL
4.3M
1.1M
29
SYNC
17
PBH
fsc
2
TO SY-A
SECAM DET
SECAM COLOR PROCESS
ONLY FOR SECAM L
LA7358M
TO SY-A
SECAM L
5V
SECAM
1
SWD 5V
28
DET
SECAM
Q1205
BUFFER
BUFFER
Q1204
14 9 10 12
21221816
V IN
OSC
4.43M
OSC
1.1M
BPF
4.3M
MUTE
REC
BIAS
FILT
BELL
DET
AGC
BPF
2.2M
BELL
LIM
BIAS
FILT
BELL
BELL
PB MUTE
AGC
1/4
P
R
P
R
BPF
1.1M
BPF
4.43M
Q1201
TP182
TO SY-A
CLK
TO SY-A
DELAY PROCESSING
CCD
P
R
P
R
P
R
P
R
Q1006
BUF
X1002
4.43MHz
P
R
P
R
R
EQ.
PB_PM
LA71590M
RFSW/HASW IN A-MUTE/C-ROT
10 11
I2C CLK
I2C DATA
V LOCK P
C SYNC
DISPLAY
ON SCREEN
V OUT TO TB-1
BUF.
47
VOUT
49
VIN
17 18
REC H
Q1081
Q1013
Q1002
Q1015
SW
EQ AMP
Q1003
BUF
REC H
FSC
49
46
45
43
41
Y_DELAY
Q1004
BUF
SIGNAL
DELAYED
CLAMP
TC2
AGC
TO TB-1 IC861
VD IN(AV1)
38
36
34
31
32
DET
SYNC
BPF1
R
P
R
P
C-LPF
P
BPF2
CONV
AMP
B-UP
DET
ACC
ACC
R
P
CTL
PB_EQ
30
29
AMP
6DB
28
II PLL
PB_C
PB_Y
P
R
MIX
Y/C
ANR
PIC-CTL
FBC
DE_EMP
NL
Y.N.R
Y-LPF
SEP
SYNC
26
IMS
Chara
242322
DECODER
SERIAL
1/2
20 21
CLAMP
EMPHA
DETAIL
LIM
DOUBLE
LPF
SUB
DEM
FM
CLIP
W/D
MOD
FM
FM AGC
REC
Q1005
BUF
515254
C COMB
LPF
CCD
575961
AMP
COMB
64 63
VXO1
6667
VXO2
DET
KIL
6970717273
PAL M DET
SECAM DET
BD
KIL
NAP
BPF
KIL
Q1007
PB ENV
BUF
ENV DET
74
94
93
91
90
89
88
84
85
83
82
+
AGC
PB_FM
FM AGC
REC
DET
FM AGC
REC
OUT
COMP
DET
ENV
RF PROCESSING
HEAD AMP
CH2
HEAD DRUM
SP HEAD
CH1
TUNER
OPTION
ROTARY
ONLY FOR SP&LP
ONLY FOR SP
TUNER
IC101
IC121
IC301
Blockschaltplan / Block Circuit Diagram – Video/Chroma