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