NAD T761, Service Manual

Page: 36 / 70

46
AC3 BOARD
U104, U109, U116, U131
U134: NE5532
AMPLIFIER 1
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
V –
AMPLIFIER 2
V +
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
1
2
3
4
8
7
6
5
+ – – +
27
36 8-11,14-17 18 5 4 19 7 6 20 21
37
38
44
43
42
41
40
39
3
28
29
25
26
22
30
31
32 33 34 35 2 13 24 1 12 23
Parallel or Serial Host Interface
24-Bit
DSP Processing
Framer
Shifter
Input
Buffer
Controller
Compressed
Data Input
Interface
CMPDAT,
SDATAN2
CMPCLK,
SCLKN2
CMPREQ,
LRCLKN2
SCLKN1,
STCCLK2
LRCLKN1
SDATAN1
CLK1N
CLKSEL
FILT2 FILT1 VA AGND DGND[1-3] VD[1-3]
XMT958
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
DC
DD
EXTMEM,
GPIO8 ABOOT,
INTREQ A1,
SCDIN A0,
SCCLK
SCDIO,
SCDOUT,
PSEL,
GPIO9 WR,
DS,
EMWR,
GPIO10 RD,
R/W,
EMOE,
GPIO11
CS
DATA7-0,
EMAD7-0,
GPIO7-0
RESET
Digital
Audio
Input
Interface
PLL
Clock Manager
RAM Input
Buffer
RAM
Program
Memory RAM
Program
Memory
RAM
Output
Buffer
Output
Formatter
RAM
Program
Memory RAM
Program
Memory
STC
AC3 BOARD
U105: CS4926
D7
D Q
CP
FF8
Q7
D6
D Q
CP
FF7
Q6
D1 D2 to D5
D Q
CP
FF2
Q1
D0
CP
OE
D Q
CP
FF1
Q0
AC3 BOARD
U106, U107: 74HC574
AC3 BOARD
U114: 74HCU04
1 1A 14 VAC
2 1Y 13 6A
3 2A 12 6Y
4 2Y 11 5A
5 3A 10 5Y
6 3Y 9 4A
7 GND 8 4Y