Block Diagram - NAD T 754 Service Manual

BLOCK DIAGRAM

CPU CPU CDIN
CCLK
CDOUT
CS
RESET
COAX / OPT
OUT
74HC251
COAX IN
CS-8415
DIR
OPT IN
DSP SECTION
TAPE
OUT
TAPE
IN
Ex FRONT
IN
Ex SURR
IN
Ex BSURR
IN
Ex CEN
IN
Ex SUB
IN
V3
OUT
V4
OUT
V1
V2
V3
V4
V5
V6
CD
TUNER
AUDIO
IN
CPU CDIN
CPU
CCLK
CDOUT
CS
RESET
INTREG
LEVEL LEVEL
SHIFTER SHIFTER
74HC245 74HC245
DSP
CS-49326
74HC157
LEVEL
SHIFTER
74HC245
D/A
CS4228
96/24
C S SR SL BSR BSL
ELECT
VOLUME /
AUDIO
SELECTOR
M61516
ELECT
VOLUME /
AUDIO
SELECTOR
M61516
VOLUME
ENCODE
TRIGGER
IN/OUT
IR
IN
KEY
MATRIX
HCF4094
VFD DRIVER
VFD
A15
CPU
A16
A17
EPROM
256k x8
74HC574
W27C02
(COMPOSITE/S)
D/A
CS4340
96/24
(COMPONENT)
CPU
BASS
RE-DIRECT
FR FL
EEPROM
RST IC
TCM810
24C16
CPU
T89C51RD2
PT6306
11
V1
V2
V3
V4
V5
V6
VIDEO
IN
VIDEO
IN
V1
MULTI-
PLEXER
74HC4052
V2
74HC00
SR
MUTE
SL
SUB
MUTE
C
MUTE
FR
MUTE
FL
BSR
MUTE
BSL
MUTE
MSR
MUTE
MS AUDIO
OUT
MSL
MUTE
CPU
T89C51RD2
CLK DATA
ARRAY OF
SHIFT REGISTERS
HCF4094
V3 OUT
VIDEO
SELECTOR
74HC4051
V4 OUT
CPU
CPU
OSD
LC74763
MON OUT
75 OHM
VIDEO OUT
DRIVER
(COMPONENT)
BA7660FS
74HC04
CPU
EXT 7.1
IN
SR
SUB
SL
BSR
PRE-OUT
C
BSL
SPK
FR FR
OUT
RELAY
FL (B)
FL
SPK
FR
OUT
RELAY
(A)
FR FL
POWER
FL
AMP
C
SPK
C RELAY
OUT
SR
SPK
RELAY
OUT
SR SL
POWER
SL
AMP
BSL
SPK
RELAY
OUT
BSL
74HC
4051
CS4228
CS4340
CS49326
CS8415A
LC74763
74VHC
M61516
245