JVC HR-S6970AA Service Manual page 39

VIDEO BLOCK DIAGRAM (2)
TO
FMA
2Fsc
TO
SYSCON
2Fsc
V.PULSE
C.SYNC
I2C_DATA_AV
I2C_CLK_AV
SB_GAIN(PWM)
TO
TUNER
TU_VIDEO1
J7106
1
Y
3
Y
FRONT_S_IN
4 C
C
2
J7105
2
FRONT_V_IN
1
IC7107
5
J7102
1
3
Y
2
Y
S_IN
4 C
C
3 1
J7101
6
REAR_IN
1
J7104
1
Y
2
Y
S_OUT
4 C
C
3
J7103
6
REAR_OUT
1
V_FROM_OSD
1
C_OUT
C
2
Y_OUT Y
3
C_IN_CH2 C
4
C_IN_SH1 C
5
Fsc
6
TO_SUB_EMPH
7
FROM_SUB_EMPH
8
PB_COLOR C
9
Y_TO_SUB Y
10
SYNC_OUT
11
V_FROM_AV
12
Y
Y_TO_AV
13
C
REC_COLOR
14
VHS[H]
15
48
51
49
46
45
74
DATA
73
CLK
WF6
Q3
SW27
43
BUF
42 R*L-SECAM
EXT
SW26
40
LPF
38
37
GCL
35
GCL
34
GCL
33
36
25
7 28
31
29
Y
WF5
0 3
Q4
BUF
Q12
BUF
L7
FILTER
53 55 57 59 58 65
72
CCD
CONT
2fsc
CLOCK DRIVER DOWN
LCVCO
CONV
CCD-
CHROMA ACC ACC
CONT MODE
SW REC
ACC DET DET DISCRI
CONTROL
AFC
CCD BLOCK
KINSEKI
MSM7470 Series
SW30
P
Y-CCD
VCA
CLPF2 CLPF1
4PHASE
R
C-CCD
+
R P SW33
R P
SW29
CCD
LPF
MAIN + MAIN
CONV2 CONV1
SW31
P R
P R SW32
SW51
R
L-DET
P
P NP PILOT PILOT
C.K B.D
CONV
ERASE ADD
P
C
BPF SW28
4.43PAL
MPAL CONV.
R
INT DELAY
SW17
6dBAMP SW15
SVHS+L-SECAM SQPB
P
SECAM
N.L. DELAY Y-LPF
SQPB EQ +SSEQ
DE-EMPH R
SQPB
VIDEO AGC
SQPB
SQPB SVHS+L-SECAM
SW19 SW16
SW20
C-SQUELCH P R
SW24
DO
DO/REC GCL DO DET
SW23
R*SDECK
R*SVHS SW14 ATT ATT ATT ATT
-10dB -10dB -10dB -4dB
N.L.
YNR DEH ET LPF
EMPH
V-AMP
SUB LPF
HP-NC PC
TRAP-NC SW18
SW52
P R
SQUE CLEAR VIDEO ALC
SYNC / FBC
LCH
R
SW21 SW22 R*SDECK
SYNC R*SDECK ATP
35PinGCL
ATT
SEP PG AGC DET
-6dB
R*SDECK
0.5Vp-p R*SDECK
PG
GCL
27 24 26 21
19 17 15
23
WF4
WF3 WF1
WF2
Y
Y
C
2-29 2-30
MAIN (VIDEO/N. AUDIO, TERMINAL)
WF7
TP106
PB. FM
X2 X1
NOT
USED
63 67 69 71 70 76 77 78
X-TAL CR DET
B-Y INVERT
VCO/OSC
REC
APC
80
PB KILLER
APC D.FF
APC 82
SW
MESECAM
DET
81
TANK
SW35
SW36
83
L-SECAM
:C-ACC:ON HPF ENVDET
MIX LEVEL
CHROMA
C.K
ACC ADJUST
DET DET
L-SECAM
85
B.E
C-ACC:THROUGH REC
L-SECAM SW39
TRAP
LPF
:ON SP2
SP2
SW42 SW44
86
CH2
SW34 SW37 L-SECAM
FH HPF
CH1
CTL TRAP
P R REC
SP1
TRAP SW45
:OFF 87
SP1
REC
+ VC
C REC TRAP
MUTE
DELAY HiFi TRAP
SW46
SW40
SW41
EXT
SP
2MLPF 89
INT
SP2
SP
57 PIN
EXT SP2 SW47
SW43
3.3k ADD CH2
SW38
P
ACC CH1
INT EXT
R
SD SP1
SW25 SW48
SW8 SP1 91
HPF
P
SD SW9
629
SW49
DL TRAP
R
SQPB
REC
P-EQ
SW12 FILTER
LPF S-DET
G-EQ
FM AGC
FM MOD
DET
FO/DEV ADJ
DLIM SW11
P
MAIN EMPHASIS
DEMO CARRIER OFFSET
R
W.C/D.C
SW10
REC FBC+ALC
PB AGC+APL
R
9
SW13
P
MAIN
DE EMPHASIS
16 12 14 10
IC1
( VIDEO & AUDIO
SIGNAL PROCESSOR )
WF8
TP111
TO
D. FF
SYSCON
D. FF
MESECAM_DET
TO
SYSCON
VIDEO_ENV
VIDEO
CN1
HEAD
6
SP CH2
5
SP CH1
WF9
4
3
LP/EP_CH2
2
LP/EP_CH1
1
90
TO
SYSCON
20
S_DET(H)
8