JVC HM-DH40000K Service Manual page 118

VIDEO BLOCK DIAGRAM ( 1 )
0 3 MAIN (S-SUB)
Note : For the waveforms in this block diagram, refer to page 2-56.
2-57
C
C
Y
+
WF8
42 41 40
CR
WF7
ADJ
PRE LPF
43
Y
CLAMP
PRE LPF
ATT
WF6 DIGI/PB
EXT PB Y
45
PRE LPF
WF5
47
C C
PRE LPF
48 EXT PB C
C
WF4
EXT PB C
49
50
51
ATT
CLAMP
52
53
GCL
COMP IN
REC
54
AGC
Y/C IN
PB
AGC DET
S.SEP
56
Y
WF3
ATT
IC501
( Y/C SWITCH )
1 2 3
WF2
Y
WF9
NOT NOT
USED USED
39 38 36 34 33
CLK DATA
IIC LOGIC
CONV
PB DIGI/PB
REC
REC
CONV
DIGI
PB*CONV
PB
DIGI
CONV
CONV
VCA
REC
PB*CONV
PB REC
N.C.
REC PB
TRAP
BB
PB*D15
C.K.
BB
V5
V4
V3/V4
V3
C1 C3
C2
S1/S2 DET
Y1 Y3
Y2
ATT ATT
6
4 5 7 8 9 10
WF1
Y
WF10
Y
C
32 31 30 29
SP/EP ( LP )
EE/PB
VHS
CLAMP
S-VHS
REC 28
PB
PB
REC
27
N/S-LPF
CLAMP
EQ
REC
25
CLAMP
NOT
USED
24
23
FILTER FILTER
21
ATT
CLAMP
20
19
V FBC V MUTE
D7&D8 18
NOT
BB BIAS
USED
17
BB
NOT
C MUTE
USED
D16
Y FBC
15
NOT
Y MUTE
USED
ATT ATT
11 12 14
( S-VHS & SV
1
2
EE ( L )
REC
5
NO
PRO
PB
6
REC