Video Block Diagram - Sony SLV-478 Service Manual

SLV-478/677HF/678HF/688HF/L47/L48/L57/
L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF

3-2. VIDEO BLOCK DIAGRAM

688HF,L57,L58,L77HF,L78HF,X50 MODEL
JK-161 BOARD (1/2)
(SEE PAGE 4-24)
CJ801
CN801
L2 VIDEO
VIDEO
1
LINE 2 IN
CN423
CJ570
VIDEO
LINE 1 IN
IC260 !• REC/PB
FROM
TUNER
BLOCK
(SEE PAGE 3-10)
2.4Vp-p
H
TO/FROM
IC260 !¶ REC/PB
SYSCON
BLOCK
5Vp-p
30Hz
IC260
VIDEO REC/PB AMP
DRUM
VIDEO
HEAD
PB
CN260
3
SP 11
CH1
10 2
COMP
SW7 SW3
PB
7 5
SP
CH2 6 6
SW8 SW4
PB
9 13
EP
CH1
8 14
SW10 SW6
PB
13 11
EP
CH2 12 10
SW9 SW5
REC
REC
4
IDEL
SW1
IC260 4 REC
PB:ON REC
12
SW2
PB:ON
1V/Div
0.1µsec/div
30
CN261
REC CURR
1
FOR PB RF
2
CHECK
RF SWP
3
IC260 #º REC
CN261 2 PB
CN261 1 REC
CN261 3 REC/PB
5Vp-p
30Hz
200mV/Div 0.1µsec/div
IC201 #∞ REC
MA-317 BOARD
(SEE PAGES 4-6, 8)
IC201 @• REC
IC201 (1/2)
Y/C PROCESSOR
1Vp-p
H
30
1 CLP
28 CLP
IC201 #¶ REC/PB
32 CLP
4Vp-p
44
H
PB C KIL
FSC
NAP
B.D BPF
IF702 8 TU V
IC160 84 C SYNC 37
IC160 65 S OUT1
IC201 $∞ PB
IC160 67 S CLK1
IC160 18 RF SWP
IC160 8 RF VIDEO
(SEE PAGE 3-5)
H
SW5V
L263
29
16
L262
C SYNC
18
DATA
19
CLOCK
20
RF SWP
17
C ROT
21 66 C ROT
R
P
R
Q260
C
LPF
PB RF P
22 BUFFER
SUB
CONV
14 KIL
TRAP
SEQ
Q202
S
17
BUFFER
N
PB Y/C PB
15
EQ
ENV
26
HPF
DET
16
Q201
VCA
REC RF
28 BUFFER
DET
IC260 @™ PB
REC
ADJ
200mV/Div
0.1µsec/div
IC201 !∞ PB
IC260 @• REC
0.5V/Div 20mV/Div
0.1µsec/div 0.1µsec/div
3-3
IC201 #• REC/PB
1Vp-p
H H
VIDEO
34 35
AGC
R
FBC
P
AGC
22
DET
+
C
46 45
NC
Y/C
MIX
N.L DHP PIC
DE-EM NC CTL
R
SYNC
SEP
P
500mVp-p
ACC
DET
R
BPF DL
P 1 EQ
ACC MAIN BPF
AMP CONV 2
48 3
50 1
SUB
BPF
R
25
S
P
FM DOUB SUB
DEM
N AGC LIM LPF
20
REC RF REC FM DE
18
EQ MOD ENH
IC201 $• REC
IC201 @∞ REC
IC201 !¶ PB
IC201 %º REC
0.5Vp-p
H
200mV/Div
0.1µsec/div
200mV/Div 0.1µsec/div
IC501
CHARACTER GEN
2Vp-p
33 SW5V CLK 2
L204
DATA 4
Y VCC 36
CS 3
C VCC 47
Q501
12 S IN
QV/VH VIDEO
38 11 9
BUFFER V IN V OUT
INS AMP
19 20
IC202 (1/2)
X501
7.15909MHz
1H DELAY
40
CLP
1/2 Q209
R
1H
LPF YNR 42 5 7 BUFFER
DL
Q211
P
P R
10 BUFFER
REC
BGA
IC202 (2/2)
R
COMB FILTER
P
Q210
1H/2H
+ 13 BUFFER 52 LPF
DL
COMB
PB
BGA-B
TH
R.A
Q208
B
DE
26 CLP
EMPH
KIL
DET
PB
BGA-B
61
IC201 $• PB
IC201 %º PB
340mVp-p
0.23Vp-p
H H
3-4
QVD IC160 13
FROM
S CLK IC160 70 SYSCON
BLOCK
S OUT IC160 68
IC160 64
CS
(SEE PAGE 3-5)
CJ570
Q502 Q560
VIDEO
BUFFER BUFFER
LINE OUT
TO
RF
TUNER
TU701 5
VIDEO
BLOCK
(SEE PAGE 3-9)
IC501 9, !¡ REC/PB
2Vp-p
H
IC201 %§ REC
3.579545MHz
550mVp-p
IC201 %§ PB
3.579545MHz
500mVp-p
REC APC
VXO1 56
DET
X202
3.57MHz
55
PB APC
DET
AFC
VCO
DET
SLD
51 49 54