NAD T 754, Service Manual

Page: 11 / 73

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