Service manual

HT-DD5000/C
– 45 –
Figure 45 BLOCK DIAGRAM OF IC
IC403 VHiNJM2279D-1: Video Switch (NJM2279D)
IC803 VHiAK4520A/-1: 20bit 2ch A/D,D/A Converter (AK4520A)
12
3
1
2476 14
5
10
81113
Vin1
Vin2
Vin3
SW1 MUTE2 GND1 GND2 V
Vout2
Vout1
V
MUTE1SW2
6dB 75Ω
6dB 75Ω
4.45kΩ
4.45kΩ
AMP. DRIVER
AMP. DRIVER
4.14kΩ
4.14kΩ
20kΩ
20kΩ
20kΩ
20kΩ
20kΩ
AINL+
AINL-
AINR+
AINR-
VREFH
VREFL
VCOM
AOUTL
AOUTR
PWAD PWDA
DEM0 DEM1
MCLK
CMODE
LRCK
SCLK
SDTO
SDTI
DIF0
DIF1
TST1
TST2
TST3
DGNDVDAGNDVA
∆ ∑
Modulator
∆ ∑
Modulator
∆ ∑
Modulator
∆ ∑
Modulator
Decimation
Filter
Decimation
Filter
LPF
LPF
Common Voltage
8x
Interpolator
8x
Interpolator
Serial I/O
Interface
Clock
Divider
5
3
4
1
2
6
28
26
27
24
23
16 17
18
19
20
10
13
14
12
11
25
22
21
8
7
15
9
1 2 3 4 5 6 7 8 9
10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
VREFH VREFL AINR+ AINR- AINL+ AINL- VA AGND DIF0 DIF1 LRCK SCLK SDTI SDTO
VCOM AOUTR AOUTL CMODE PWAD PWDA DGND VD TST1 TST2 TST3 DEM1 DEM0 MCLK
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