DVR-220-S
16
1
2
3
4
1
2
3
4
C
D
F
A
B
E
3.1.2 TUNB and FRJB ASSYS BLOCK DIAGRAM
U301
V/U Tuner FrontEnd
VXF 1022-
SCL
SDA
AFT
AGC
<u-com>
Q306
TUON
TUON<u-com>
+32V
Reg.
+6V
SW.
+5V
Ripple Filter
Audio
EVOLCLK
EVOLDATA
EVOLCE
LC75342M
IC601
Audio Selector
with
Electric A.T.T
Audio Input Circuit
Output Circuit
Video Input Circuit
SDET2 <u-com>
SDET3 <u-com>
SDET1 <u-com>
LAMUTE
RAMUTE
<MAIN>
(Discrete)
R
L
Comp
C
Y
V
C
Y
Cb
Cr
Y
Muting
OUT2
OUT1
JA1301
JA1302
IN3
(Rear)
IN2
(Front)
IN1
(Rear)
JA601
Y
V
V
C
Y
C
V
Y
C
S
S
S
L
R
L
R
L
R
JA702
IC701
LA73033
Video Selector
&
Video Driver
(2/2)
IC701
LA73033
Video Selector
&
Video Driver
(1/2)
<u-com>
SCL
SDA
YVSEL
SWSTBY
<u-com>
R
L
V/Y
U/V
U/V
C
SYNC
Sync-Sepa
LPF
LPF
LPF
27
25
36
51
53
5
45
60
56
58
63
65
68
41
43
26
TUNB ASSY
(VWV2010)
A
JCKB ASSY (VWV2027)
B
FRJB ASSY (VWV2004)
F
CN1301
CN705
CN402
CN401
CN301
CN451
4
10
12
2
6
8
8
6
12
2
JA701
JA651
Component
OUT
Optical
OUT
4
10
13
5
4
18
17
2
1
3
9
7
5
1
4
7
15
16
1
3
18
19
17
5
7
9
13
10
Decoder
CXA2064M
Separation
IC451
MPX Audio
STID
<u-com>
<IC601>
<u-com>
SYNCAFT
<u-com>
SYNC
<u-com>
Q514
Q451
UV_L/R <from TUNB ASSY>
SUID
STID
AGC
SCL
SDA
SCL
SDA
AFT
AGC
AFT
SUID
UV_L
UV_R
MUTE
MUTE
Wideband
ATT
15kHz LPF