Video Block Diagram - JVC HM-DH30000U Service Manual

4.38

VIDEO BLOCK DIAGRAM

5
1 5 S-SUB
4
C
C
Y
PRE LPF
3
43
Y
CLAMP
45
47
C
48
C
49
50
NOT
USED
51
CLAMP
2
52
53
REC
54
PB
56
Y
IC501
( Y/C SWITCH )
1
Note : For the waveforms in this block diagram, refer to page 4-67.
A B
Y
Y
C
+ NOT
USED
42 41 40 39 38 36 34 33 32 31 30 29
EE/PB SP/EP(LP)
CR
VHS
ADJ CLK DATA CLAMP
S-VHS
IIC LOGIC
CONV
PB DIGI/PB REC
PB
REC REC PB
CONV
PRE LPF DIGI
ATT REC
PB*CONV N/S-LPF
DIGI/PB
EQ
PB REC
EXT PB Y
PRE LPF DIGI
CONV
CONV
C
PRE LPF
VCA
REC
PB*CONV
EXT PB C
PB REC
EXT PB C
N.C.
ATT
REC PB
TRAP
ATT
V FBC V MUTE
BB
PB*D15
C.K. D7&D8
GCL BB BIAS
BB
V5
COMP IN V4
AGC BB
C MUTE
V3/V4
Y/C IN V3
C3 D16
C1
C2
AGC DET Y FBC
S.SEP
Y MUTE
S1/S2 DET
Y1 Y3
Y2
ATT ATT ATT ATT ATT
1 2 3 4 5 6 7 8 9 10 11 12 14
C D
IC1401 ( Y/C SEP & MIX )
DFFI
VR
SDATA
SCLK
REC
COUT
PS com/CNR
PB
REC
3L COMB YOUT
Y COMB
PB
REC PB
31 29 24
Q1417
BPF BUF
Y
IC502
( S-VHS & SVHS-ET SWITCH )
1
28 18
EQ
SP
27
2 17
CLAMP
SP
EE(L)
EQ
16
REC PB
25
CLAMP
5 NON LINEAR 12
PROCESSOR
24
NOT
USED
PB
6
11
23 EQ
SP
FILTER FILTER REC
10
SP
EQ
21
NOT
CLAMP
USED
20
19
18
NOT
USED
17
C
15
Y
E
4-73 4-74
0 5 3D DIGITAL/4M
7
8
11
12
17
BPF BUF
Q1402
19
LPF BUF
CN1401
Q1406
15
14
12
11
C
9
Y
Q1408, Q1418
7
Y
BUF
5
C
3
1
WF1
WF2
CN511
2
3
4
C
9
Y
10
Y
11
C
12
C
13
14
16
Y
17
18
19
20
21
22
23
25
26
Y
27
Y
29
C
30
WF9 WF8 WF6
WF7
WF10
WF13
WF11
WF14
WF12
CN512
4
6
C
8
Y
10
C
12
Y
14
F
D.FF
1
V.REF
2
I2C DATA A/V
3
I2C CLK A/V
4
C FROM DIGI
5
Y FROM DIGI
6
Y/V TO DIGI
7
C TO DIGI
8
Fsc
9
WF3
WF4
I2C DATA A/V
10
I2C CLK A/V
11
Fsc
12
C TO DIGI
13
Y/V TO DIGI
14
Y FROM DIGI
15
C FROM DIGI
16
PB COLOR
17
V.PULSE
18
MAIN ALC DET
19
Y TO SUB
20
P.MUTE(L)
21
WIDE_DET
22
FRONT Y IN
23
FRONT C IN
24
FRONT V IN
25
REAR1 V IN
26
V TO OSD
27
CHARA DATA
28
Y TO AV
29
V FROM AV
30
REC COLOR
31
WF5
C OUT
32
Y OUT
33
REAR2 C IN
34
REAR2 Y IN
35
REAR1 C IN
36
REAR1 Y IN
37
G H