NAD T760, Service Manual

Page: 36 / 65

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