Sharp HT-DD5000W Service Manual page 46

IC403 VHiNJM2279D-1: Video Switch (NJM2279D)
Vin1 12
Vin2 3
1
Vin3
IC803 VHiAK4520A/-1: 20bit 2ch A/D,D/A Converter (AK4520A)
AINL+
AINL-
AINR+
AINR-
VREFH
VREFL
VCOM
AOUTL
AOUTR
SW2
13
20kΩ
20kΩ
20kΩ
20kΩ
2 4
SW1 MUTE2
VA AGND
7 8
∆ ∑
5
Modulator
6
∆ ∑
3
Modulator
4
1
2
Common Voltage
28
∆ ∑
26 LPF
Modulator
∆ ∑
LPF
27
Modulator
23
24
PWAD PWDA
Figure 45 BLOCK DIAGRAM OF IC
V
MUTE1
11 8
AMP.
6dB
20kΩ
4.45kΩ
AMP.
4.14kΩ
6dB
4.45kΩ
4.14kΩ
7 6
GND1 GND2
VD DGND
21 22
Decimation
Filter
Decimation
Filter
Serial I/O
Interface
8x
Interpolator
8x
Interpolator
DEM0 DEM1
– 45 –
DRIVER
10
75Ω Vout1
DRIVER
5
75Ω Vout2
14
V
15 MCLK
Clock
Divider
25 CMODE
11 LRCK
SCLK
12
14 SDTO
SDTI
13
DIF0
9
DIF1
10
TST1
20
TST2
19
TST3
18
16 17
HT-DD5000W