Block Diagram - NAD D7050 Service Manual

Bluetooth
module
SP DI F
COA X 1
SP DI F
COA X 2
SP DI F
OP T O1
SP DI F
OP T O2
B ridge Module Board
CX870 IIS
DC/DC A pple Cer iticiate IC
3. 3V 1. 2V M F I341S2500
T R IG IN
P lug in senser
K E Y S F OR A IR P L A Y 5V 2A
(R E A R P A NE L )
R ST
SP I
WPS
HOS T _IR E Q
B G P SU E N
T R IG & keys
FP P BOA R D
F R O NT P A NE L CO NT R OL
N A D
5V S
(T OUCH K E Y )
Direction
Detector
A M P & PRE A M P

BLOCK DIAGRAM

DDF A SP I
IIS
3V 3
T herm al Detect ion
OP R E L A Y
HP DE T E CT
Main Controler
R ail Detect ion
M ain P SU therm al DE T
+/ -29V on
3. 3V S
C O NT R O L
INT ER F A C E
M C LK 108M
P W M
IIS
O UT P U T
INP UT F O R M A T S AM P LE R AT E 4th O R D ER
2450
IIS VO LUM E F S C O NV ER T ER NO ISE S H AP ER
F S
T R EBLE, BA S S , EQ ZT A F ILTER
P W M
IIS
R EF
O UT P U T
NO ISE
S HA P ER S AM P LER
DDFA
3rd (ADC )
RRO CES SO R
3V 3
+/ -5V
L DO L DO DC/DC +/ -8V
+/ -8V L DO
3V 3 1V 8
5V 2A
DC/DC
5V 2A
M ain P SU therm al DE T
+/ -29V on
A M S1117-3. 3
5V S 5V 3 1A
6
Head phone
AMP
VC C
O U TPUT
ST A G E L
P W M O UT P UT C H0 C H1
LF
F EED B AC K
GND
NET W O R K
P W M R EF O U T P UT C H0 C H 1
VEE
P W M R EF O U T P UT C H2 - C H 7
VC C
O U TPU T
INTE G R A TO R ST A G E R
TR IA N G LE
C O M P A R A TO R
LF
TR IA N G LE
C O M P A R A TO R
D D FA
F EED B AC K
INTE G R A TO R
GND
Feedback Processor NET W O R K
VEE
T herm al Detect ion
OP R E L A Y
HP DE T E CT
T herm al Detect ion
OP R E L A Y
R ail Detection
HP DE T E CT
R ail Detect ion
+29V
+/- 29V
High dynamic
400V DC
Power Factor Correction
Isolated DC convertor
MAIN PSU
EMI FILTER
LOW LOSS STANDBY PSU
P S U BOA R D
Signal
Pow er
contro l
Pre o u t/SUB
M U TE
H ead Ph o ne
C hassi s
L CH OP
C hassi s
C hassi s
R CH OP
C hassi s