JVC HM-HDS1EK Service Manual page 78

0
TO
TUNER
TUNER_VIDEO
V.PULSE
TO
I2C_DATA_A/V
SYSCON I2C_CLK_A/V
C.SYNC/V.REF
5
CN501
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
EE(L)
7 6
Y/V_TO_DIGI
Y
8 5
C_TO_DIGI
C
9 3
Fsc
10 1
CN502
EE(L)
11 1
I2C_DATA_A/V
12 2
4
I2C_CLK_A/V
13 3
Fsc
14 4
C_TO_DIGI
C
15 9
Y/V_TO_DIGI
Y
16 10
Y_FROM_DIGI
Y
17 11
C_FROM_DIGI
C
18 12
PB_COLOR
C
13
19
V.PULSE
20 14
MAIN_ALC_DET
21 16
Y_TO_SUB
Y
22 17
P.MUTE(L)
23 18
FRONT_Y_IN
24 20
FRONT_C_IN
25 21
FRONT_V_IN
26 22
REAR2_V_IN
27 23
V_TO_OSD
28 25
CHARA_DATA
29 26
Y_TO_AV
Y
30 27
V_FROM_AV
Y
3 31 29
REC_COLOR
C
32 30
J7001
3 6
S_IN JACK
1
CN7002
CN7507
3 FRONT_Y_IN
1 1
Y
4 FRONT_C_IN
3 3
C
2 FRONT_V_IN
5 5
J7002
2
V_IN
1
2
TO
DV MAIN (DV V OUT)
CN3501
CN703
C
D_C_IN 6
D_Y/V_IN 4
D_C_OUT 3
D_Y_OUT 1
CN7506
V_FROM_OSD
1
2
33
C_OUT
C
4
34
Y_OUT
Y
35 6
REAR2_C_IN
C
36 8
REAR2_Y_IN
Y
37 10
REAR1_C_IN
C
38 12
REAR1_Y_IN
Y
39 14
Note : For the waveforms in this block diagram, refer to page 4-63.
A B
3
MAIN (VIDEO, VIDEO I/O SW, CONNECTION)
Y
D_VHS(H)/D_SEPA(H)
+
Y
12 11 10 9 7 5 4
TP701 D1 SYNC
CLAMP Clamp
D AGC
GCA
KEYED
PEAK Def .
D.FF
Q725 LPF
Y 14
BUF IC707
IC711
SP_CONV/D_BS/D_F 4
Fsc
2
D_VHS(H)/D_SEPA(H)
5
7
1
3
IC712
4
2
5
7 1
C
3
IC705
2
IC710
5
4
D_YV(H) 7
5 3
7 1 1
NOT
3
USED
4
D_R2/D_R1Y/D_FV
2
D_TU(H)
IC702
OUT2_D(H)
4
B.BACK(H) 2
1
C
7 3
C
5 Q705
NOT BUF
Q709
IC703
USED
P.MUTE(L)
4 BUF
2
1
7
3 Y
5
BUF NOT
Q713
USED
Y
Q711, Q712
Y
BUF
C
Q708
BUF BUF
Q710
Y
Y
Q714
BUF
CN7501
13 9 5 1
11 7 3
CN7101
IC7102
4
OUT1_L2(H)
2
1
OUT1_D(H)
3 7
5
Y
IC7101
4
2
1
3 7
5
Y Q7112, Q7113
Q703 C
BUF
C
BUF
Y
3
15
Q706
BUF 14
5
REG
2.5V
13
C
7
6dB
Y 11
6dB
V 10
12dB
IC7103
CN7502 CN7102
1
Y Y
3
C
5
0 6
TERMINAL
C
TP106
PB FM
WF1
C
Q21
Q5
BUF BUF WF3
& EQ BUF
WF2 WF4
26 29 27 30 2 1
BDL C
VCA
LPF BDL
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
BPF
ADD
MIX
R
LEVEL
ADJ
Clamp
R
REC N.L. N.L.
De .Emph Emph
DO
21 A GC Det P
Det
PB ALC
SQPB SQPB
SQPB ET
D .E.
P EQ ET ET LPF
22 APT CTL N.C .
A TT
(-10dB)
R
FBC/ALC
20
NOT
ATT
( )
USED -10dB
Video
18 A GC
ATT
( )
-10dB YNR
WF11
DO
16
DO
ATT Y /REC
( -10dB ) BDL
WF10
I2C P R P
BDL R
Clamp
46 LOGIC
LPF
Clamp
D A T A
45
CLK
10 11 6 12 13 14
FILTER Q18
B UF
WF9
WF8
CN7503
CN7103
I2C_CLK2
I2C_DATA2
Y
C
Y
Q7102
IC7104
Q7103
BUF 24
J7104
1
A V2
23
CLAMP
IN/DECODER
22
Y.IN .IN V.GND V .GND
20 20 18 18
3
NOT
19 19 15 15 11 11
CLAMP
21
USED V.OUT V .OUT C/R C/R G G
20 5
CLAMP
18
C
17 7 Q7118-Q7120
AMP
16 9
J7102
BUF
A V1
Q7114
15
NOT
IN/OUT
Q7115
11
USED
Y
Y/V .IN V .GND
13
20 18
DATA
I2C_DATA2
19 15 11
Y/V.OUT C/R G
14 12
AV1
CLK
I2C_CLK2
YCIN(H)
Q7116
BUF
AV1
Q7117
&SW Y
YCIN(H)
D E
4-75 4-76
Fsc
Q10
2Fsc
BUF
Q24
IC1
X1
BUF
( VIDEO & AUDIO
SIGNAL PROCESSOR )
34 44 42 40 38 55
fsc IN
WF5
LPF
X-tal
CR Det
VCO/OSC
2fsc VCO
2fsc
P R
fH LOCK CTL
D.FF
112
Head SW1
REC PB/REC D.FF CTL
Color Killer PB REC
Head SW2
ID Det. APC APC AFC Discri
APC ACC Det
SW 111
1/2 HPF ENV DET
1/2
DOWN
Conv . 2FL VCO
Phase SW .
Pulse
Gen.
120
ME
SECAM TANC
DET
4Phase
Gen.
SP 101
P DET
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
FM GC A
G EQ -
DL TRAP
EQ
R
CH2
DET
SQPB
WF6
DLIM
SP1
- 106
CH1
DeMOD
SP1
+
Sub LPF
+
108
REC LP2
Main
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
7 8
WF7
2Fsc
SW
Q17
P.MUTE(L)
Y
CN704
3
1 2 3 4 5 6 8 9 10 11 14
2
CN851
J7101
1
3
Y
S_OUT
4
C
2
7 7
B B
IC851
( ON_SCREEN
DISPLAY)
27
CS2
5 CHABLK
LN21
MUTE
11
SDATA
SYNC_DET
10
7 SCLK
CV_IN
B 9
CS1
2 CVOUT
XTAL_IN
1 7 ON SCREEN
F
TP111
D.FF
TO
SYSCON
D.FF
VIDEO_ENV
NOT
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, SUB CPU
NORM/MESEC/S
OSD_CSB
OSD_CLK
VHS(H)
OSD_DATA
I2C_CLK2
I2C_DATA2
P.MUTE(L)
SYNC_DET(H)
WF3
Q853 AMP
4
3
8
21
19
WF1
WF2
G H