Luxman DA-250 - Block Diagram

USB D/A CONVERTER DA-250
20
Block Diagram
Key
IR
System Control
CPU
DAC
PCM1795
Bal. R Unbal. R
OPT COAX
Digital out
Analog out
Bal. L Unbal. L
COAX OPT-1
Digital in
USB
Phones
Volime Display
Data
Sel.
Data
Sel.
LINE
Analog in
OPT-2
Buffer
Buffer
Buffer
Buffer
Buffer
Tr-
Driver
H/P
+Amp
Clock
Generator
low phase-
noise
32kHz～192kHz
REG. ±15V REG. ±15V REG. ±15V
REG. ±15V
I-V
Amp
–
I-V
Amp
–
I-V
Amp
–
I-V
Amp
–
L.P.F.
– +
L.P.F.
+ –
L.P.F.
+ –
L.P.F.
– +
Buffer
Tr-
Driver
H/P
+Amp
3p: HOT (+) 2p: COLD (-) 1p: GROUND
DIR / DIT
PCM9211
32kHz～192kHz
2.8224/5.6648MHZ
USB
Controller
LPC1822
Power Regulator
for Digital Circuit
Power Regulator
for Audio Circuit
Power Regulator
for Acc. Circuit
Power
Transformer
Line
Filter
FUSE
POWER SW
LECUA LECUA LECUA