Power supply module
USB DAC
CB303
SECONDARY
PRIMARY
Mute
Mute
Mute
IC312
Qxx
Input
4.9Vrms max
2Vrms_max
Speaker Impedance
6 ohms
4.2Vrms_max
(E_Vol: +6.5dB)
±7Vpk input
70Wx2 at 6 ohms
L+R
PCM, DSD
L/R
7
(Power)
Tone
control
BASS
TREBLE
BALANCE
VOLUME
USB DAC
Indicators
PHONES
HP_OUT
HP_OUT
Power
Detector
IC310
IC615
IC302
R1154H001-T1-F
IC607
RP130Q331D-TR-F
IC609
RP170H331B-T1-F
1A
150mA
150mA
+3.3M
+3.3S
IC307
R3116N271A-TR-F
PCM/DSD
x1,x2,x4,x8
IC801
BH6578FVM-TR
IC305
NJM5532MD-D
XL601
24MHz
XL604
80MHz
CE
IC606
S25FL116K0XMFI0
IC604
TC7SH125FU
IC301
BD9328FJ
PUSH
/RESET
D+,D-
20mAmax
3mAmax
20mAmax
20mAmax
190mAmax
IC308
BR24G01FVM-3GTR
TS3USB221ARSER
CB304
CB306
W802
CB305
W301
CON2
CON3
JK601
AUDIO_ON
CON1
IC802
BD9876AEFJ-E2
A-U670/U671
Rotary
encoder
A-670/U670
A-U671
A-U670/U671
A-U670
A-U670/A-670
A-U671
AC IN
PWR_DET
+3.3M
MODEL
XMS_N_RST
DAC_N_RST
AMP_MUTE
BS_AD
N_RST
PWR_ON
TRB_AD
AMP_PRT
AMP_MUTE
AMP_SD
BLN_AD
VOL_AD
PS1,PS2
VOL_AD
BS_AD
PWR_ON
HP_DET
DAC_N_RST
TRB_AD BLN_AD
VOL_UP
VOL_DN
+3.3S
+3.3M
TxD0,
RxD0,
TOOL0
N_RST
+3.3S
LED
+5M
+27V
+5M
AMP_SD
AMP_PRT
TC_DATA
SW_MUTE
TC_CLK
TC_CE
HP_MUTE
XMS_N_RST
XMS_CLK
XMS_DATA
PWR_ON
SW_MUTE
HP_MUTE
INSP_MODE
INSP_OUT
VOL_UP
VOL_DN
HP_DET
LED_ON x8
EP/DAC_CLK
EP/DAC_DATA
SYS_MISO
SYS_MOSI
TC_DATA
TC_CLK
TC_CE
XMS_CLK
XMS_DATA
STBY_CTL
AUDIO ON
USB ON
+3.3A
+5V
EP/DAC_CLK
±27V ±10%
±10V
±27V
+3.3U
+5V
+5V
PWR_DET
Serial I/F
General I/O
Interrupt
A/D port
±10V ±10%
GND
AUDIO ON
GND
±27V
±7A
±7A
±7A
±7A
±7A
MAIN
±10A
+7A
-7A
VSS
VAA
+10V
EP/DAC_DATA
SYS_MISO
SYS_MOSI
VBUS
ANALOG IN
A-670
LINE IN
SUBWOOFER
SYSTEM
USB DAC
USB
SPEAKERS
L/R
A-U670/A-670
A-U670/A-U671
A-U670/A-U671
A-U671
MAIN (4)
MAIN (3)
MAIN (6)
MAIN (2)
MAIN (5)
VOLUME
• See page 43
→
SCHEMATIC DIAGRAM
• See page 41
→
SCHEMATIC DIAGRAM
MAIN (1)
• See page 41, 42
→
SCHEMATIC DIAGRAM
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
A-U670/A-670/A-U671/NS-BP401/NS-BP301
33
■
BLOCK DIAGRAM
