NAD C 390DD, Service Manual

Page: 10 / 88

DIGITAL
SELECTOR
INPUT
DIGITAL
INTERFACE
TRANSMITTER
DIGITAL
INTERFACE
RECEIVER
BYPASS
DI
T SOURCE SELECTOR
PORT A
IIS INPUT
IIS OUTPUT
PORT A
IIS INPUT
IIS OUTPUT
DIX 4192
DIT/DIR
ADV7623
HDMI Transceiver
HDMI IN 1
HDMI IN 2
HDMI IN 3
HDMI OUT
OPTO
COAX
COAX 1
COAX 2
OPTO1
AES/EBU
S
P
DIF INP
UT
SPD
IF
OU
TPU
T
MCU
CIG128X3201 BOE
SPI
IIS switcher
IIS
0
,1
PRE Buffer
Gain
0,3,6,9dB
NE5532
ADC PCM4202
Optional Analog card
INPUT FORMAT
VOLUME
TREBLE,BASS,EQ SAMPLE RATE
CONVERTER
ZTA FILTER 4th ORDER
NOISE SHAPER
PWM
OUTPUT
PWM
OUTPUT
REF
MCLK 108M
FS
2450
FS
SAMPLER
(ADC)
NOISE
SHAPER
3rd
ZETEX FPGA
DDFA
PWM REF OUTPUT CH0 CH1
PWM OUTPUT CH0 CH1
VCC
VEE
VEE
VCC
OUTPUT
STAGE L
OUTPUT
STAGE R
LF
LF
LOGI
C DRI
VER
LO
G
IC
D
R
IV
ER
L CH OP
FEED BACK
NETWORK
FEED BACK
NETWORK
TRIANGLE
COMPARATOR
TRIANGLE
COMPARATOR
INTEGRATOR
INTEGRATOR
CONTROL
INTERFACE
GND
GND
R CH OP
IIS
lin
e
IIS3
ZETEX DDFA
Feedback Processor
D
1
G
2
V
3
GP1UV701QS
Key and IR front panel
TRIG IN
TRIG OUT
IR IN
LOGIC BUFFER
Control interface
SPI/IIC
SPI
GPIO SPI GPIO/INT
GPIO/INT
Regulator For preamp
ABLETEC APL400 PSU MODULE or HANSONG DESIGN
+/-70V
DC/DC
5V
+/-10V
3V3D
3V3D
3V3D
3V3D
AMS1117-1.8
1V8D
3V3D
DC/DC
Standby PSU(PI TOP267EG)
12.5V 4A power on mode (switched)
5V standby mode( <0.2W dissipation )
+/-70V 1.38A continuous 4.13A peak
5VS
5VS
5VS
POWER SWITCH
L N
6.3AT/250V
GPIO
MAIN L MAIN N
12.5VD
12.5VD
12.
5VD
DC/DC AND LDO
+/-12V 3V3D 5VA
12VD on/off and standby
+/-70V on/off
SPI bus
Signal
Power
control
IIC bus
PRE Buffer
NE5532
Pre out
RS232
PIC24FJ256
Optional HDMI module
DC/DC
Main MCU
VS1053
Man
datory US
B card
PIC32MX460F256L
Type A
Type B
USB audio decoder
EEPROM
46 pi
n boar
d-
boar
d socket
46 pi
n boar
d-
boar
d socket
SL
OT3
SL
O
T
2
OP
TI
O
N
C
A
R
D
S
LDO
+/-5V
R3V3
DC/DC
MOS-SWITCH
IIS1
IIS2
IIS0
IIS1
IIS2
INT1
INT2
SPI
SPI
IIC
IIC
IR 0-2
SPI
bus
IIC b
u
s
IR 0-7
USB SWITCH
USB
Type A
Front panel usb
NAD C390DD BLOCK DIAGRAM
VERSION: V1.08
Drafted by: Percy
Data: 2010-5-4
TAS1020
USB audio Device
SN74CB3Q3253
FPusb
FPusb
TS3USB221
TS3USB221
DC/DC
4VF
12.
5VD
GPIO 0-7
GPIO8-12
GPIO 4-7
PWM REF OUTPUT CH2- CH7
MOS-SWITCH
FPusb
AMS1117-3.3
3V3S
12.5VD
12.5VD
AT32UC3A0512
USB HOST
OPTO2
GPIO
Plug in senser
35VF
for upgrade
LDO 5V
5VD
LDO
3V
3
1V8
5V
Impedance
Detect L
Impedance
Detect R
Impedance detect L&R
46 pi
n boar
d-
boar
d socket
MOS-SWITCH
IIS0
INT0
IIC
GPIO 0-3
FPusb
SN74CB3Q3253
SPI
12V EN
12V EN
12V EN
PHONE AMP
MC/MM
PHONE AMP BYPASS
SL
OT1
SELECT
O
R
TBD
PIC18F26K20(
M
C
U
)
IIS3
PEN 0-2
Block Diagram