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Video Block Diagram - JVC HR-J271MS Service Manual

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4.26

VIDEO BLOCK DIAGRAM

0
3
MAIN
TO
SYSCON
Fsc
MESECAM(H)
3.58NTSC(H)
(3.58NTSC(L))
V
.PULSE
5
V TO OSD
C.SYNC
I2C
DA
T
A
(I2C
DA
T
A
A/V)
I2C
CLK
(I2C
CLK
A/V)
V
FROM
OSD
TO
SYSCON
SYNC DET(H)
D201
OSD CS
D202
S.CLK
D203
S.DA
T
A FRSYS
P
.MUTE(L)
ONLY USED FOR
HR-J677MS ,
4
HR-J777MS
Q901
TO
TUNER
RF
VIDEO
TU
VIDEO
3
J7103(J2)
2
REAR VIDEO OUT
1
2
J7104(J1)
2
REAR VIDEO IN
1
J7105(J7101)
2
FRONT VIDEO IN
1
ONLY USED FOR
HR-J677MS ,
HR-J777MS
ONLY USED FOR
HR-J477MS ,
HR-J677MS ,
1
HR-J777MS
A
(
, ON SCREEN ,
)
VIDEO
TERMINAL
Q201
15
8
SYNC DET
CV
IN
BUF
9
CS
2
10
SCLK
XT
AL IN
11
SD T
A
A
3
13
CV
OUT
MUTE
ONLY USED
Q7105
FOR
IC201
BUF
HR-J677MS ,
HR-J777MS
( ON SCREEN DISPLAY )
26
29
ONL
Y USED FOR
HR-J271MS , HR-J471MS
BUF
6dB AMP
C.SQUELCH
25
Clamp
21
22
A
TT
(
-10dB
)
20
A
TT
(
-10dB
)
18
A
TT
(
-10dB
16
A
TT
(
-10dB
)
I2C
Interface
ONLY USED FOR
46
DA A
T
HR-J271MS , HR-J471MS
45
CLK
B
C
ONLY USED FOR
HR-J271MS , HR-J471MS
Q39-Q41
(Q39-Q42)
IC1
TP106
SW
PB.FM
(
VIDEO & AUDIO
Q22
SIGNAL PROCESSOR )
NOT
BUF
USED
27
30
2
1
2fsc
VCO
BDL
C
VCA
LPF
BDL
fH
LOCK
CTL
C.K
R
P
6dB AMP
LEVEL
Det1
Color
Killer
N
P
ID Det.
CLPF
Delay
LEVEL
B.E
APC
ACC
Det
B.D
Det2
SW
R
P
SQUELCH
Pulse
WHITE
Gen.
LIMITER
EXT
CLEAR
CLPF
SYNC
INT
Sync.Sep.
Main
Main
CTL
TRAP
Conv2
Conv1
C.K
fH
HPF
L-SECAM
L-SECAM
P
P
R
R
P
TRAP
R
P
PILOT
BPF
ADD
MIX
R
LEVEL
ADJ
SQPB
G
R
EQ
REC
N.L.
N.L.
SQPB
De.Emph
Emph
DO
AGC
Det
P
DLIM
Det
PB
ALC
DeMOD
SQPB
SQPB
SQPB
ET
D.E.
P
EQ
LPF
ET
ET
Sub
LPF
APT
CTL
N.C.
R
FBC/ALC
Main
De.Emph
V
ideo
AGC
R
P
)
YNR
DO
DO
Y
/REC
BDL
Y
LPF
BDL
R
P
R
P
P
R
Clamp
LPF
Clamp
10
11
6
12
13
14
,
,
Q38
L24
L28
C106
,
C109
FIL
TER
,
,
C110
R92
R93
Digitized in Heiloo Netherlands
D
4-51
4-52
NOTE :
About IC Pin No. and Symbol No. etc.
XXX : HR-J677MS , HR-J777MS
( XXX ) : HR-J271MS , HR-471MS
Q12
BUF
ONLY USED FOR
HR-J271MS , HR-J471MS
ONLY USED FOR
HR-J677MS , HR-J777MS
X2
X1
34
44
42
40
38
55
fsc
IN
LPF
X-tal
CR Det.
VCO/OSC
2fsc
P
R
112
Head
SW1
(92)
PB
REC
REC
PB/REC
D.FF
CTL
Head
SW2
APC
APC
AFC
Discri
111
(91)
HPF
ENV
DET
1/2
DOWN
1/2
Conv.
2FL VCO
Phase
SW
.
120
ME
(100)
SECAM
T
ANC
DET
4Phase
Gen.
101
SP
(81)
P
DET
Comp
2M
LPF
ACC
DET
R
EP
(
)
LP
HPF
104
L-SECAM
(84)
LPF
REC
YCA
MUTE
L-SECAM
COMP
SP2
SEP.
+
105
P
SP2
(85)
SQPB
P
629
FM
AGC
DL
EQ
TRAP
-
R
CH2
DET
SP1
106
-
CH1
(86)
SP1
+
+
108
(88)
REC
EP2
Filter
-
CH2
EP2
FM
MOD
CH1
109
-
(89)
fo/Dev Adj
Main
Emph
EP1
S-DET
Carrier
Offset
+
W
.C/D.C
EP1
110
(90)
7
8
C12 L2
,
R3
FILTER
E
F
1/21/2018
TP111
D.FF
TO
SYSCON
D.FF
VIDEO
ENV
NOT
USED
U.DRUM
VIDEO
CN1
HEAD
8
8
8
SP
CH2
7
7
7
6
6
6
SP
CH1
5
5
5
4
4
4
(
)
EP
LP
CH2
3
3
3
2
2
2
EP
(
LP
)
CH1
1
1
1
ONLY USED FOR
HR-J471MS ,
HR-J677MS , HR-J777MS
TO
SYSCON
NORMAL/MESECAM
G
H

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This manual is also suitable for:

Hr-j471msHr-j777msHr-j677ms

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