JVC HR-XV3EK Service Manual page 51

VIDEO BLOCK DIAGRAM ( 1 )
MAIN ( S-SUB,TERMIANL )
0 3
WF15
+
WF16
42 41 40 39 38
PB-Y
WF17
ATT BG CR ADJ
BF
43
Y
REC
44
SSEP
PB SW11
45
SW5 SW7
GCL
CONV CONV CONV CONV
46 DIG OSD
VHS[H]
DIG OSD
SW10
47
Y
PRE
LPF1
WF18
REC+ SW4
PB*0dB
PB*+1dB
WF19
C 49
+1dB
VCA
SW3 SW8
50
DIG DIG DIG DIG
NOT
SP[H]
USED
D13
51
C CH1-C
PB
SW2
REC PB
REC
C 52
SW17 SW1
CH2-C
53
NOT
PB[H]
USED
WF20
POSLPF2 POSLPF1
54
C PRE
LPF2
ATT ATT
55
PAL[H]
NOT SW19
CL2
USED
56
D1*D14*D15
COMP
YC MUTE
1 3 4 5
NOT
USED
WF9
SW5V
WF8
WF8 IC501-3 WF9 IC501-5 WF10 IC501-12
REC/PB 0.66Vp-p REC/PB 0.6Vp-p REC/PB 1.7Vp-p
0.2V/20µsec/DIV 0.2V/20µsec/DIV 0.5V/20µsec/DIV
IC1201 ( Y/C SEP & MIX )
REC
PS com/CNR
PB
REC
3L COMB
Y COMB
PB
REC PB
19 10 5
Y
C
Y
Y
C
Y
WF14
IC501
+ + ( MIX )
Y/C SEP &
ONLY USED FOR
37 36 35 33 32 31 30 29
S-VHS MODEL
IN
BF
DC 28
REGEN ATT EQ
REC
SP
27
Y
+
LIM2 EQ
PB
+
EP
PB REC
PB 26
REC
NVHS
PB REC 25
+ NC
LIM1 +
SVHS
SUB-EMPH
24
OUT
SW18
C
PB+
EXT IN VIDEO
ACC:ON ACC:OFF
D15
SW9
EXT IN VIDEO
SW6 D9 22
NC
CK
REC PB 21
SW12
20
FILTER FILTER
DIG FIL FIL DIG FIL FIL
OSD OSD OSD OSD
DIG OSD
SW13 SW15
C MUTE TRAP
OSD OSD OSD OSD
SW14 SW16 + 18
ATT
WF13
YFBC VFBC
17
YMUTE CMUTE VMUTE
+6
V-OUT 16
WF12
CL2
15
CHARA_DATA
C
CLK DATA Y-OUT C-OUT
6 7 8 9 10 12 13 14
+
WF11
WF10
NOT
USED
Y
C
C
C
C
Y
C
WF11 IC501-14 WF12 IC501-16 WF13 IC501-18 WF14 IC501-36
REC/PB 1.45Vp-p REC/PB 2.3Vp-p REC/PB 2.3Vp-p REC 0.39Vp-p
0.5V/20µsec/DIV 0.5V/20µsec/DIV 0.5V/20µsec/DIV
0.2V/20µsec/DIV
0 5 2D DIGITAL
ONLY USED FOR
S-VHS MODEL
CN1201
34 I2C_DATA
12
IIC_DATA
35 I2C_CLK
IIC_CLK 11
41 C C_FROM_DIGI
COUT
BUF
9
Q1202
Q1203
44
YOUT Y Y_FROM_DIGI
BUF 7
NOT USED
VR1201
40
VREF
D/A LEVEL ADJ
Q1205
V/Y_TO_DIGI
Y
BUF
5
Q1204 C_TO_DIGI
C
BUF 3
Fsc
1
CN501
1 3 5 7 9 11
C
Y
Y
C
C
C
C
Y
C
Y
2-43 2-44
WF15 IC501-40 WF16 IC501-42 WF17 IC501-43 WF18 IC501-47
REC 0.66Vp-p PB 1.75Vp-p REC 0.5Vp-p REC 1.7Vp-p
0.2V/20µsec/DIV 0.5V/20µsec/DIV
0.2V/20µsec/DIV 0.5V/20µsec/DIV
Y
12
3
VHS MODEL
CN7104 CN7191
FRONT_V_IN
7 5
FRONT_Y(H)
IC7102
1
4
2
Y
6 FRONT_Y_IN
4 8
FRONT_C_IN
C
2 10
WF18 IC501-47 WF19 IC501-49 WF20 IC501-54
PB 1.3Vp-p REC 0.66Vp-p PB 1.6Vp-p
0.5V/20µsec/DIV PB 0.6Vp-p 0.5V/20µsec/DIV
0.2V/20µsec/DIV
VHS(H)
a
Y V FROM AV
b
Y TO SUB
Y
c
SYNC_OUT
d
REC COLOR
C
e
Fsc
f
Y Y TO AV
g
TO_SUB_EMPH
h
FROM_SUB_EMPH
i
I2C_DATA_AV
j
I2C_CLK_AV
k
IF_SEL_YV_IN
l
C PB COLOR
m
FRONT_V_IN
n
TU_VIDEO
o
I2C DATA
TO
I2C CLK
SYSCON
V FROM OSD
CN7102
I2C_CLK
4 p
I2C_DATA
5 q
VHS_V_OUT
7 r
TU_VIDEO
9 s
RF_V_OUT
11 t
IF_SEL_YV_IN
13 u
CN7103
C REAR2_C_IN
1 v
C VHS_C_OUT
3 w
Y VHS_Y_OUT
4 x
Y DAC1
6 y
C DAC0
8
z
Cb DAC2
aa
9
DAC3
Cr
10 ab
TO
ON SCREEN
V_TO_OSD
CHARA_DATA
TO
TUNER
RF_VIDEO
CN7301
C
C/Cv/Y
2
TO
Y
Y/G/Cv
4
DVD UNIT
Cb
6 Cb/B/Cv
CN502
Cr
8 Cr/R/C
6 SW/JACK
2 J7191
FRONT
1
VIDEO IN
ONLY USED FOR
S-VHS MODEL
1
J7194
3
Y
Y
FRONT
4
C
C
2 S IN