Video/Chroma - Grundig GMI4000 Serviceanleitung

GV 30..., GV 50...
Blockschaltplan / Block Circuit Diagram – Video/Chroma
VIDEO(AUOID) PROCESS
IC101
LA71590M
HEAD DRUM
82
CH2
83
LP,EP HEAD
CH1 84
ONLY FOR LP
85
HEAD AMP
RF PROCESSING
88
CH2
89
SP HEAD
CH1 90
91
REC
FM AGC
DET
93 ENV
ENV DET
DET
TO SY-A
94 COMP
ENV SW
OUT
TP182
74
BUF
PB ENV
Q1007
ONLY FOR SP&LP
ROTARY
YCA AD MUTE
ONLY FOR SP
TP183
TO SY-A
RF SWP
H AMP SW
GRUNDIG Service
Q1006
BUF
FILTER
4.43MHz
X1002
73 72 71 70 69 67 66 64 63 62
VXO2 VXO1 APC
DET
SECAM DET
COMB
PAL M DET
AMP
KIL
CCD
DET
LPF
R P
BPF
NAP
KIL KIL
BD
P
C-LPF
R
ACC
DET
R
P
CONV
REC B-UP
ACC
FM AGC P AMP
R
BPF2
+
SUB
LPF
REC
FM AGC
PB_FM FM FM DETAIL
R P
AGC MOD DEM EMPHA
W/D DOUBLE
CLIP LIM
PB_PM
EQ.
CLAMP
10 11 17 18 20
Q1002
Q1013 Q1003
EQ AMP BUF
Q1081
Q1015 SW
REC H DPC DXMIN H
GV 30..., GV 50...
Q1011
SW
BUF
Q1005
61 59 57 54 52 51
C COMB
CCD
CLK
DELAY PROCESSING
BPF1
Y_DELAY
P
R
DELAYED
SIGNAL
CLAMP
NL
Y.N.R
DE_EMP
PIC-CTL
Y-LPF
ANR
SYNC
PB_Y
DET
PB_C
Y/C
AGC
MIX
P R
TC2
R P
1/2
P
FBC
R
II PLL
P
SYNC
R SEP
R
P
SERIAL Chara 6DB PB_EQ
DECODER IMS AMP
CTL
21 22 23 24 26 28 29
Q1008
Q3107
BUFFER
BUFFER
Q1010
Q3106
GRUNDIG Service
FSC
ALTOFF H
TO SY-A
49
46
BUF Q1004
45
VD IN(AV1)
43
TO TB-1 IC861
VD IN F
TB-2 (JK881)
TUNER
41
LA7358M
OPTION
SECAM COLOR PROCESS
38
Q1202
4.3M
SW
BELL
V IN FILT
36 BUFFER
Q1205
16 18 22
PB MUTE
34 BIAS
17 PBH
PBL
R
4.43M
Q1206 BPF
BELL
P 1.1M
OSC
LIM
1/4
2.2M 4.3M
32
BPF BPF
VPS/PDC
R
TO IC141
1.1M 4.43M
BELL
BPF
P
AGC REC
AGC
DET BIAS MUTE
31
14 9 10
30 BELL
REC H FILT
1.1M
Q1203
SECAM SUPERIMP H
BUFFER
Q3109 Q3110
INT SYNCH
ON SCREEN
IC301
DISPLAY
BPF
Q3108
49 47
MUTE
VIN VOUT Q1302
Q1301/Q1303
IC307
50
H
VIN_F V OUT TO TB-1
(SYNC)
L
TUNER
BUF.
AV1 SYNC
TO TB-1
SWD5V
C SYNC
TO SY-A,IC121
V LOCK P
I2C DATA TO SY-A
I2C CLK
C SYNC
TO IC101PIN28
21 29
SYNC
2
fsc
SECAM
28
SECAM DET
DET
TO SY-A
SWD 5V
Q1201
OSC
1
SECAM
5V
SECAM L
TO SY-A
12 IC121
Q1204
BUFFER
ONLY FOR SECAM L