JVC HR-XV48EF Service Manual page 76

VIDEO BLOCK DIAGRAM
TO
FMA 2Fsc
TO
2Fsc
ON SCREEN
EE(L)
TO
SECAM(H)
SYSCON
SECAM_DET
26 1 13 14
MODE
CTL
SECAM AGC AGC
DET AMP DET
REC/PB
MUTE
PB
1.1MHz
SYNC
IC301 BPF
1/4
GATE
REC
4.3MHz
X2
SYNC PB BPF
LIM
GATE
REC
PB
4.3MHz
VCA
BPF
REC
ONLY USED
FOR EF MODEL
15 17
C
C.SYNC
I2C_DATA
TO
SYSCON I2C_CLK
V.PLUSE
TO
ON SCREEN
V_TO_OSD
V_FROM_OSD
TU_VIDEO
TO
TUNER RF_VIDEO
CN7302
Y
Y/G
1
Cb
TO Cb/B 3
Cr
DVD UNIT
Cr/R 5
Y/COMP 9
CN7103
9 10 6 8
CN915
9 10 6 8
Cb
Cr
Y
NOT
USED
IC901
40 39 37 35 33 31 29
CLAMP/
CLAMP -6 CLAMP
BIAS
LPF LPF LPF
-6
LPF LPF
51
52
CLAMP
53
CLAMP
55
BUF
56
BUF
1 3 5 7 9 12
NOT
USED
11 16 2
48
R/P
51
REC
MUTE
49
VCA
46
2.2MHz
X2
BPF
45
PB
MUTE
74
SYNC
SYNC GATE
GEN DATA
GEN
MUTE
/V-SEP
73
CLK
27
NOT 43
SW27
USED
C 42
EXT
SW26
40
38
37
GCL
GCL
35
NOT 34
GCL
USED
33
36
25
28
31
29
WF3
CN7102
11 9 7 13 4 5
CN913
11 9 7 13 4 5
0 6 TERMINAL (I/O)
28
GCL
26
GCL
24
CLAMP
22
-6
J902
21
BUF
NOT
AV2 IN/DECODER
19
USED
BUF
20 18
17
Y/V.IN V.GND
BUF
C/R G B
V.OUT
19 15 11 7
15
NOT
BUF
USED
13
CLK
14
DATA
Q912
BUF
Cr
Y
IC902
Cb
4 6
Cr
3 7
Y
2
8
Cb
C
NOT
USED
L7
FILTER
53 55 57 59 58 65 72 63 67 69
CCD
CONT
X-TAL
2fsc
VCO/OSC
CLOCK DRIVER DOWN
LCVCO
CONV
CCD-
CONT CHROMA ACC ACC PB
MODE
ACC DET SW DET DISCRI REC APC
CONTROL
AFC
APC
SW
CCD BLOCK
KINSEKI
MSM7470 Serise
SW30
P
Y-CCD
VCA
CLPF2 4PHASE CLPF1
R
C-CCD
+
C.K
R P SW33
R P
CCD SW29
C-ACC:THROUGH
LPF
MAIN
+ MAIN
CONV2
CONV1
SW31 FH HPF
CTL TRAP
P R
P R SW32
SW51
R
C
L-DET DELAY
P
P
NP PILOT PILOT
C.K CONV B.D
ERASE ADD
R*L-SECAM
P
C
INT BPF SW28
4.43PAL
MPAL CONV .
R
DELAY
SW17
6dBAMP SW15
SQPB
SVHS+L-SECAM P
SECAM
DL
LPF DELAY Y-LPF
N.L.
SQPB EQ +SSEQ
DE-EMPH R
VIDEO AGC SQPB
SQPB
SQPB
SW12
SQPB SVHS+L-SECAM
SW19 SW16
SW20
R
C-SQUELCH P
SW24
DO
G-EQ
DO/REC GCL DO DET
SW23
R*SDECK
DLIM
R*SVHS SW14 ATT ATT ATT
ATT
-10dB -10dB -10dB -4dB
N.L.
YNR DEH ET LPF DEMO
EMPH
V--AMP P
SUB LPF
HP-NC PC
TRAP-NC SW18
SW52
P R
SQUE CLEAR VIDEO ALC
LCH SYNC / FBC
R
SW21 SW22 R*SDECK
SYNC R*SDECK ATP
35PinGCL
SEP ATT
PG AGC DET
-6dB
R*SDECK
0.5Vp-p R*SDECK
PG
GCL
27 24 23 26 21 19 17 15 16
NOT NOT NOT
USED USED USED WF1
WF2
CN7104
7
CN7191
FRONT_V_IN
4
J901
AV1 IN/OUT
20 18
Y/V.IN V.GND
C/R G B
V.OUT
19 15 11 7
Q913
BUF
Cr
Y
Cb
2-37 2-38
TP106
PB.FM
0 3 MAIN
(VIDEO/N.AUDIO,
TERMINAL, SECAM)
X1 NOT
USED
IC1
71 70 76 77 78
(VIDEO & AUDIO
SIGNAL PROCESSOR)
CR DET
B-Y INVERT
REC
APC
KILLER
MESECAM
DET
SW36
SW35 L-SECAM
C-ACC:ON
CHROMA MIX LEVEL 81
ACC ADJUST
TANK
DET DET
L-SECAM
REC B.E
82
TRAP L-SECAM SW39
:ON LPF
83
SW34 SW37 L-SECAM
HPF ENVDET
P R REC
TRAP
:OFF
REC
+ VC
REC TRAP MUTE
HiFi TRAP
SW40
TP111
WF4
EXT SW41
D.FF
SP
2MLPF
80
INT D.FF
SP
57 PIN
EXT
3.3k ADD
SW38
P
ACC
INT EXT
R
SD
SW25 SW8
HPF
P
SD SW9
629
TRAP
R 85
REC
P-EQ SP2
FILTER
SP2 86
SW42 SW44
CH2
LPF S-DET
CH1
SP1
FM AGC SW45 87
FM MOD SP1
DET
FO/DEV ADJ SW46
SW11
WF5
P
MAIN EMPHASIS
89
R CARRIER OFFSET
W.C / DC
SP2
SW10 SP2 SW47 90
SW43
REC FBC+ALC CH2
PB AGC+APL
CH1
R
SW13 SP1 SW48 91
SP1
P
MAIN SW49
DE EMPHASIS
12 14 10 9 8 20
3 6 SW/JACK
2
J7191
FRONT
1
VIDEO IN
TO
SYSCON
MESECAM_DET
VIDEO_ENV
TO
D.FF
SYSCON
VIDEO
U.DRUM
HEAD
CN1
8 8
6
SP CH2
7 7
5
6 6
SP CH1
4
5 5
4 4
3
LP/EP_CH2
3 3
2
2 2 LP/EP_CH1
1
1 1
S_DET
TO
SYSCON
SB_GAIN