JVC HM-DH30000U Service Manual page 79

0
V.PULSE
I2C_DATA_A/V
TO
I2C_CLK_A/V
SYSCON
SYNC_DET
WIDE_DET/SCR_ID
C.SYNC/V.REF
5
CN7104
D.FF
1 15
V.REF
2 14
I2C_DATA_A/V
3 12
I2C_CLK_A/V
4 11
C_FROM_DIGI
C
5 9
Y_FROM_DIGI
Y
6 7
Y/V_TO_DIGI
Y
7 5
C_TO_DIGI
C
8 3
Fsc
9 1
CN7103
I2C_DATA_A/V
10 2
I2C_CLK_A/V
11 3
4
Fsc
12 4
C_TO_DIGI
C
13 9
Y/V_TO_DIGI
Y
14 10
Y_FROM_DIGI
Y
15 11
C_FROM_DIGI
C
12
16
PB_COLOR
C
17 13
V.PULSE
18 14
MAIN_ALC_DET
19 16
Y_TO_SUB
Y
20 17
P.MUTE(L)
21 18
WIDE_DET
22 19
FRONT_Y_IN
23 20
FRONT_C_IN
24 21
FRONT_V_IN
25 22
REAR1_V_IN
26 23
V_TO_OSD
27 25
CHARA_DATA
28 26
Y_TO_AV
Y
29 27
V_FROM_AV
Y
30 29
3
REC_COLOR
C
31 30
J7194
3 6 JACK
S IN
1
CN7191 CN901
3 FRONT_Y_IN
Y 9 3
4 FRONT_C_IN
C 11 1
2 FRONT_V_IN
6 6
J7191
2
VIDEO IN
1
TO
TUNER/DEMOD
TU_VIDEO
2
TO DIGITAL
CN7107
(AUDIO AD/DA)
Y
Y_IN 1
CN9801
C_IN 3
1
CN7109
C_OUT
C
32 4
Y_OUT
Y
33 6
REAR2_C_IN
C
34 8
REAR2_Y_IN
Y
35 10
REAR1_C_IN
C
36 12
REAR1_Y_IN
Y
37 14
Note : For the waveforms in this block diagram, refer to page 4-67.
A B
3
MAIN (VIDEO, SYNCDET, MAIN-TERMINAL)
Y
Q251-Q253
SYNC
DET
V/STD/HS1.FF
Fsc
P.MUTE(L)
WF11
C
Y
Y
TP7101
Y_OUT
C
C
Y
C
TP106
PB FM
WF1
C
Q5
BUF WF3
BUF
& EQ BUF
Q21
WF4
WF2
26 29 27 30 2 1
BDL C
VCA
BDL
LPF
C .K
R P
6dB AMP 6dB AMP
LEVEL
Det1
N P
C .SQ UELCH
CLPF Dela y
LEVEL
B .E
B.D
Det2
R P
SQ UELCH
WHITE
LIMITER
EXT
CLEAR CLPF
SYNC
INT
25
NOT
Sync.Sep .
Main Main
USED
C .K Con v2 Con v1
L-SECAM L-SECAM
P R R P
TRAP
P
PILOT C
BPF
ADD
MIX R
LEVEL
ADJ
Clamp
R
REC N.L. N.L.
De .Emph Emph
A GC Det DO
21 P
Det
PB ALC
SQPB SQPB
SQPB ET
P D .E. EQ LPF
ET ET
22 APT CTL N.C .
A TT
(-10dB) R
FBC/ALC
20
NOT
ATT
USED ( -10dB )
Video
18 A GC
ATT
( -10dB )
YNR
DO
16
Y DO
ATT /REC
( )
-10dB BDL
C
I2C R P R P
BDL
46 Clamp
LOGIC LPF
Clamp
D A T A
45
CLK
10 11 6 12 13 14
FILTER
WF10
WF9
WF8
0 6
TERMINAL-NTSC
WF2
TO DIGITAL
WF1
(VIDEO IF)
CN8803
CN7104
Y
D-Y_OUT 9
Cb
Cb_OUT 3
Cr
Cr_OUT
5
Y
Y_OUT
1
C
C_OUT
7
WF3
WF4
WF5
CN7105 CN7102
10 10
8 8
3 3
2 2
6 6
5 5
D E
4-75 4-76
Q12
BUF Fsc
X2
IC1
NOT
USED (VIDEO & AUDIO
SIGNAL PROCESSOR)
34 44 42 40 38 55
fsc IN
LPF
X-tal
CR Det
VCO/OSC V/STD/HS1.FF
2fsc VCO
2fsc
P R
fH LOCK CTL
112
Head SW1
PB REC REC PB/REC D.FF CTL
Color Killer
Head SW2
ID Det. APC APC AFC Discri
WF5
APC ACC Det
SW 111
1/2 HPF ENV DET
1/2
DOWN
Conv . 2FL VCO
Phase SW .
Pulse
Gen.
120
ME
NOT
SECAM TANC
USED
DET
4Phase
Gen.
SP 101
P DET NOT
2M LPF Comp
CTL TRAP USED
ACC DET
fH HPF
R EP
( LP )
P
HPF
R
L-SECAM 104
LPF REC
YCA
MUTE
L-SECAM
COMP
SP2
SEP . +
P
105
SQPB
SP2
SQPB P 629
G FM GC A
DL EQ -
TRAP
EQ
R
CH2
DET
SQPB
WF6 WF6
DLIM
SP1
CH1 - 106
DeMOD
SP1
+
Sub LPF
+
108
Main REC LP2
De .Emph Filter -
CH2
LP2
FM MOD
CH1
109
-
R P
f o/De v Adj
Main Emph
LP1
Carr ier Offset S-DET
+
W .C/D .C
LP1
110
Y LPF
P R
8
7
WF7
SW
Q17
P.MUTE(L)
IC7103
2
8
Y
3 7
Cb
4 6
Cr
IC7102
IC7101
4
C
2 2 8
6
Y
3 7
Y 4 6
C
C
Y
C
Y
F
TO
SYSCON
V/STD/HS1.FF
VIDEO_ENV
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) CH1
3 3 3
2 2 2
EP(LP) CH1
1 1 1
TO
SYSCON
NORM/MESEC/S
VHS(H)
P.MUTE(L)
J7127
6
Y_OUT
5
4
Cb_OUT
3
2
Cr_OUT
1
J7110
2
V_OUT1
1
J7114
2
V_OUT2
1
1
J7109
3
Y
Y
4 S_OUT1
C
C
2
1
J7113
3
Y
S_OUT2
4
C
2
J7102
2
V_IN
1
J7106
2
BSDEC.V_IN
1
1 J7105
4
C
BSDEC.S_IN
3
Y
2
1 J7101
4
C
S_IN
3
Y
2
G H