Video Block Diagram - JVC HM-DH30000U Service Manual

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4.38

VIDEO BLOCK DIAGRAM

5
1 5 S-SUB
4
3
2
1
Note : For the waveforms in this block diagram, refer to page 4-67.
A
C
Y
C
Y
+ NOT
USED
42 41 40 39 38 36 34 33
CR
ADJ CLK DATA
IIC LOGIC
PRE LPF
CONV
43 PB DIGI/PB
Y
CLAMP
REC REC
CONV
PRE LPF DIGI
ATT
PB*CONV
DIGI/PB
EXT PB Y
45
PRE LPF DIGI
CONV
47 CONV
C C
PRE LPF
VCA
REC
PB*CONV
48 EXT PB C
C
PB REC
EXT PB C
49
N.C.
50
NOT
REC PB
USED
51
ATT
CLAMP
52
BB
PB*D15
53 C.K.
GCL
BB
V5
COMP IN V4
REC
54
AGC
V3/V4
Y/C IN V3
PB
C3
C1
C2
AGC DET
56 S.SEP
Y
S1/S2 DET
Y1 Y3
Y2
ATT ATT ATT
IC501
( Y/C SWITCH )
1 2 3 4 5 6 7 8 9 10
B C
IC1401 ( Y/C SEP & MIX )
PS com/CNR
3L
REC PB
31 29 24
Y
Y
C
IC502
32 31 30 29
( S-VHS & SVHS-ET SWITCH )
EE/PB SP/EP(LP)
VHS
CLAMP
S-VHS
1
REC 28
PB
PB
REC
27
N/S-LPF
2
CLAMP
EQ EE(L)
PB REC
REC PB
25
CLAMP
5 NON LINEAR
PROCESSOR
24
NOT
USED
PB
6
23
FILTER FILTER REC
21
NOT
ATT
CLAMP
USED
TRAP
20
19
V FBC V MUTE
D7&D8 18
NOT
BB BIAS
USED
17
BB C
C MUTE
D16
Y FBC
15
Y
Y MUTE
ATT ATT
11 12 14
Published in Heiloo Holland
D
4-73 4-74
0 5 3D DIGITAL/4M
7
DFFI
8
VR
11
SDATA
12
SCLK
REC
17
COUT
BPF BUF
Q1402
PB
REC
19
COMB YOUT
LPF BUF
CN1401
Y COMB
PB Q1406
15
14
12
11
C
9
Y
Q1408, Q1418
7
Y
BUF
5
Q1417
C
BPF BUF
3
1
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
18
C
30
EQ
SP
WF9
17
SP
EQ
WF10
16
12
11
EQ
SP
10
SP
EQ
WF13
WF14
CN512
4
6
C
8
Y
10
C
12
Y
14
E F
29/11/2016
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
WF1
WF2 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
WF8 WF6
WF7 WF5
WF11
WF12
C OUT
32
Y OUT
33
REAR2 C IN
34
REAR2 Y IN
35
REAR1 C IN
36
REAR1 Y IN
37
G H