NAD T 761 Service Manual page 37

AC3 BOARD
U108: AT27C020-70
(16) Vss
(32)
Vcc
(1) Vpp
(31) PGM#
Control FSM
(22) CE#
(24) OE#
A9
(2-12, 25-30)
A 0-17
AC3 BOARD
U110: CS8414
RXP
RXN
AC3 BOARD
U111-U113: CS4340
SCLK/DEM1
3
1
RST
4
LRCK
2
SDATA
7 6
DIF0 DIF1
Power
Switch
IO
Control
STB
Address
Latch
VD+ DGND VA+
7 8
9
RS422
Receiver
10
Mux
13 16
CS12/FCK SEL
DEM0
8
De-emphasis
Interpolation
DAC
Filter
Interpolation
DAC
Filter
5
MCLK
(13-15,17-21)
D 0-7
Data IO
Buffer
Data Latch
Y-Dec
Y-MUX/Sense
X-Dec
2 Mbit Array
VA+ FILT AGND
22 20 21
Clock & Data
Recovery
Mux
6 5 4 3
C0/E0 Ca/E1 Cb/E2 Cc/F0 Cd/F1 Ce/F2
MUTEC
16
External
Mute Control
15
Analog Filter
12
Analog Filter
47
Vpp 1
A 16 2
A 15 3
A 12 4
A 7 5
A 6 6
A 5 7
A 4 8
A 3 9
A 2 10
A 1 11
A 0 12
D 0 13
D 1 14
D 2 15
GND 16
MCK M3 M3 M2 M1 M0
19 17 18 24
Audio
Serial
Port
De-Mux
Registers
2 27 25
REF
AC3 BOARD
U115,U117, U120: 74HC74
4
1SD
2 1D
3
1CP
AOUTL
1 1RD
AOUTR
10
2SD
12 2D
11
2CP
2RD
13
VCC
14
32 Vcc
31 PGM#
30 A 17
29 A 14
28 A 13
27 A 8
26 A 9
25 A 11
24 OE#
23 A 10
22 CE#
21 D 7
20 D 6
19 D 5
18 D 4
17 D 3
23
26
SDATA
12 SCK
FSYNC
11
1
C
14 U
VERF
28
15
CBL
GND 7
SD
5
1Q
Q
D
FF1
CP
6
1Q
Q
RD
SD
9
2Q
Q
D
FF2
CP
8
2Q
Q
RD