JK1
MAIN (2)
(Side A)
R814
MAIN (4)
(Side A)
MAIN (5)
(Side A)
MAIN (6)
(Side A)
MAIN (3)
(Side A)
A-U670/A-670
A-U670/A-U671
W4
W7
A-U671
A-U670/A-U671
A-U671
+5V
LED_PCMx8
LED_DSDx1
LED_DSDx2
LED_PCMx1
LED_PCMx2
LED_PCMx4
+5V
LED_PCMx8
LED_DSDx1
LED_DSDx2
LED_PCMx1
LED_PCMx2
LED_PCMx4
LED_PWR
DGND
BLN_AD
BS_AD
VOL_A/REMOTE
PWR_ON
+3.3M
+3.3S
TRB_AD
DGND
VOL_B/VOL_AD
VOL_B/VOL_AD
VOL_A/+3.3S
DGND
Remotecontrol
sensor
A-U670/A-U671
PURE
DIRECT
INPUT
BASS
–
+
–
+
L
R
TREBLE
BALANCE
PHONES
HP_DET
R
L
GND
VOL_B/VOL_AD
VOL_A/+3.3S
DGND
+3.3M
LED_PWR
PWR_ON
DGND
+3.3M
LED_PWR
PWR_ON
DGND
LED_AUX
LED_USB
LED_PURE
+5V
INPUT_SW
PURE_SW
LED_PCMx8
LED_DSDx1
LED_DSDx2
LED_PCMx1
LED_PCMx2
LED_PCMx4
POWER
indicator
(Power)
PURE DIRECT
indicator
LINE
indicator
USB
indicator
VOLUME
USB DAC indicators
PCM
DSD
chassis
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
38
A-U670/A-670/A-U671/NS-BP401/NS-BP301
• Semiconductor Location
Ref no. Location
D4
I3
D7
F4
D8
F4
D9
F4
D10
C6
D11
C6
D12
C6
D13
C6
D14
C6
D15
B6
D16
E6