44
S-VIDEO BOARD
U401: LC74763-9012
KEY BOARD
U201: LC87F65C8A
8
CS
9
SIN
10
SCLK
15
RST
11
SECAM
12
525/625
13
NTSC/PAL
14
3.58/4.42
Serial
Parallel
Converter
Composite
Synchron-
ization
Singal
Control
AFC
Circuit
Sync
Separator
8-bit Latch
and
Command
decoder
Horizontal
Character
Size Register
Horizontal
Display
Position
Register
Vertical
Display
Position
Register
Horizontal
Display
Position
Detection
Vertical
Display
Position
Detection
Character
Control
Counter
Timing Generator
Sync
Separator
Horizontal
Display
Position
Detection
Synchronization
Signal Generator
Character Output Control
Background Control
Video Output Control
Line
Control
Counter
Flashing/
Reversal
Control
Register
Flashing/
Reversal
Control
Circuit
Display
Control
Register
RAM Write
Address
Counter
Display
RAM
Decoder
Decoder
Font
RAM
Shift Register
Vertical
Character
Size Register
Horizontal
Size
Counter
Vertical
Size
Counter
Horizontal
Dot
Counter
Vertical
Dot
Counter
30
VDD1
17
VDD2
22
VSS
29
SYNCDET
27
VCOIN
28
VCOOUT
26
FC
20
SYNIN
24
AMPIN
25
AMPOUT
23
PDOUT
21
SEPC
4
HSYNOUT
7
VSYNOUT
2
XTALIN1
3
XTALOUT1
19
CVCR
16
CVOUT
18
CVIN
5
XTALIN2
6
XTALOUT2
Interrupt Control
IR
Flash ROM
PC
ACC
B Register
C Register
PSW
RAR
RAM
Stack Pointer
W
atch Dog
T
imer
ALU
PLA
Stand-by Control
CF
Clock
Generator
RC
X'tal
Bus Interface
Port 0
S100
Port 1
S101
Port 3
T
imer 0
Port 7
T
imer 1
Port 8
Base T
imer
ADC
VFD Controller
W
eak
Signal Detector
INT
O-3
Noise rejection Filter
Summary of Contents for T 751
Page 1: ...NAD SERVICE MANUAL T 751 SURROUND SOUND RECEIVER T 751S U R R O U N D SOUND RECEIVER ...
Page 11: ...13 PCB LAYOUT SPEAKER BOARD DIGITAL BOARD PRIMARY BOARD SECONDARY BOARD TONE BOARD ...
Page 12: ...14 PSU BOARD S VIDEO BOARD LED BOARD AC OUTLET BOARD ...
Page 13: ...15 AC3 DTS BOARD COMPONENT SIDE AC3 DTS BOARD SOLDER SIDE ...
Page 14: ...16 MULTI CHANNEL BOARD MAIN BOARD ...
Page 15: ...17 KEYBOARD COMPONENT SIDE KEYBOARD SOLDER SIDE ...
Page 17: ...19 SURROUND AMPLIFIER BOARD TUNER BOARD VIDEO BOARD AUDIO BOARD ...
Page 64: ...SERVICE MANUAL NAD 2001 T 751 SURROUND SOUND RECEIVER NAD ELECTRONICS INTERNATIONAL TORONTO ...