NAD D 7050, Руководство по обслуживанию

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COA X 2
OP T O1
S
P
D
IF
I
N
P
U
T
INP UT F O R M A T
VO LUM E
T R EBLE, BA S S ,EQ S AM P LE R AT E
C O NV ER T ER
ZT A F ILTER 4th O R D ER
NO ISE S H AP ER
P W M
O UT P U T
P W M
O UT P U T
R EF
M C LK 108M
F S
2450
F S
S AM P LER
(ADC )
NO ISE
S HA P ER
3rd
RRO CES SO R
DDFA
P W M R EF O U T P UT C H0 C H 1
P W M O UT P UT C H0 C H1
VC C
VEE
VEE
VC C
O U TPUT
ST A G E L
O U TPU T
ST A G E R
LF
LF
L
O
G
I
C
D
R
I
V
E
R
L
O
G
I
C
D
R
I
V
E
R
L
CH OP
F EED B AC K
NET W O R K
F EED B AC K
NET W O R K
TR IA N G LE
C O M P A R A TO R
TR IA N G LE
C O M P A R A TO R
INTE G R A TO R
INTE G R A TO R
C O NT R O L
INT ER F A C E
GND
GND
R CH OP
IIS
D D FA
Feedback Processor
T R IG IN
B
U
F
F
E
R
DDF A SP I
MAIN PSU
DC/DC +/-8V
+/-29V
Signal
Pow er
control
Head phone Pre o ut/SUB
Main Controler
L DO
+/-5V
R
3
V
3
P W M R EF O U T P UT C H2 - C H 7
A M S1117-3.3
P lug in senser
3
V
3
C
S
8
4
1
6
C
Z
Z
S
P
D
IF
RE
C
E
IV
E
R
32
-1
9
2
K
B ridge Module Board
CX870
A pple Cer iticiate IC
M F I341S2500
I2
C
HOS T _IR E Q
WI
F
I
Id
ev
i
ce
E
th
er
n
et
SP DI F
SP DI F
IIS
8
4
4
K
H
z
L DO
3V 3
L DO
1V 8
1
V
8
3V 3
DC/DC
5V 2A 5V 2A
5
V
S
5V 3 1A
3.3V 1.2V
3
.3
V
1
.2
V
SP I
3V 3
S
P
I
R ail Detection
T herm al Detection
T herm al Detection
R ail Detection
T herm al Detection
R ail Detection
D
D
F
A
S
P
I
IIS
+/-29V on +/-29V on
3.3V S
V
O
L
U
M
E
S
O
U
R
C
E
T R IG & keys
IR
F R O NT P A NE L CO NT R OL
3
.3
V
S
5V S 5V S
M ain P SU therm al DE T
M ain P SU therm al DE T
C hassis
C hassis
C hassis
C hassis
P S U BOA R D
A M P & PRE A M P
FP P BOA R D
B G P SU E N
L
E
D
S
T
B
Y
K
E
Y
R ST
K E Y S F OR A IR P L A Y
WPS
(R E A R P A NE L )
IIS
H ead Phone
OP R E L A Y
OP R E L A Y
M U TE
OP R E L A Y
HP DE T E CT
HP DE T E CT
HP DE T E CT
AMP
COA X 1
SP DI F
SP DI F
OP T O2
B
T
Bluetooth
module
IIS
(T OUCH K E Y )
N A D
O
L
E
D
D
IS
P
L
A
Y
Direction
Detector
Power Factor Correction
400V DC
High dynamic
Isolated DC convertor
LO W LOSS STANDBY PSU
EMI FILTER
A
C
I
NL
E
T
DC/DC
+29V
5V 2A
+/-8V
BLOCK DIAGRAM
6