CB1
CB5
IC1
CB6
CB7
CB11
W2
JK1
W3
CB8
W4
IC2
CB9
IC4
IC5
IC7
CB10
W5
IC5
IC15
IC4
IC10
IC9
IC9
IC8
IC12
IC12
IC16
CB3
CB2
USB
INPUT L
INPUT L
OUTPUT L
PORTABLE
INPUT L
1
5.1
5.1
5.1
5.1
0
0
3.4
3.3
5
.1
5
.1
5
.1
5
.1
5
.1
5
.1
0
.2
0
0
0
2.0
0.6
0.1
0.1
0
0
0
2.0
0.1
2.0
0
0.6
2.0
0
5.1
2.4
0.9
0.2
0
2.0
2.0
0
0.2
0.6
11.6
11.6
0
4.9
4.9
4.9
11.6
4.9
0
0
0
0
0
0
0
4.9
4.9
4.9
0.1
4.9
0
0.6
11.6
0.1
1.5
3.4
3.4
3.4
1.6
3.4
3.4
3.4
3.4
3.4
5.1
3.3
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.1
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4
.9
4
.9
4
.9
4
.9
4
.9
2.0
0
0
0
12.7
12.7
12.7
12.7
5.0
0
0
0
0
0
0
0
11.7
11.7
8.7
3.1
0.1
0.1
0.1
12.7
12.7
41.4
41.4
17.2
17.2
29.4
37.1
25.0
49.2
49.2
49.2
49.2
49.2
12.7
12.7
12.7
12.7
12.7
43.6
43.0
49.0
0
0
0
0
0
11.7
48.9
11.3
12.7
11.3
11.7
5.0
4.9
0.5
0.5
0.7
0.7
4.9
0.2
5.0
5.0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
.0
5
.0
5
.0
5
.0
5
.0
5
.0
5
.0
1
2
.6
2.5
2
.5
1
2
.7
1
2
.7
1
2
.7
1
2
.7
1
2
.7
1
2
.7
12.7
1
2
.7
0
.7
0
.7
0
.7
0
.7
1
.5
1
2
.6
1
2
.6
2
.4
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
4.9
3.7
3.7
4.9
4.9
4.9
4.9
4.9
2.5
0.2
-0.1
0
-0.1
0
2.5
11.6
11.6
0
0
0
0
0.5
4.5
4.5
4.5
4.5
A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
H
I
J
K
L
M
N
NX-U10
19
★
All voltages are measured with a 10M
Ω
/V DC electronic voltmeter.
★
Components having special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
SCHEMATIC DIAGRAM
MAIN
IC1
: LM3525MX-H
Single port USB power switch and
over current protection
EN
GND
FLAG
NC
IN
NC
OUT
OUT
1
2
3
4
8
7
6
5
IC5
:
µ
PC4570G2
Dual operational amplifier
+ –
+ –
1
2
3
4
8
7
6
5
OUT
1
OUT
2
–IN
1
+IN
1
+IN
2
-IN
2
–V
CC
+V
CC
IC7
: NJM78L05UA
Voltage regulator
INPUT
OUTPUT
GND
1
2
3
5
4
7
6
8
1. A OUTPUT
2. A -INPUT
3. A +INPUT
5. B +INPUT
6. B -INPUT
7. B OUTPUT
8. V
+
4. V
-
IC9, 12
: NJM022BM
Dual low power operational amplifiers
A
B
VREFL
HPOL
PVDDPL
OUTPL
PVSSL
OUTML
PVDDML
PVDDPR
OUTPR
PVSSR
OUTMR
PVDDMR
HPOR
INL
XI
XO
CKIO
SLEEPN
MUTEN
HP
PROTN
MODE[2:0]
GAIN[1:0]
INR
VREFR
PVDDREG
Under Voltage
Protection
Over Current
Protection
Headphone
Amplifier
(R-ch)
Balanced
Digital
Modulation
Unit
(R-ch)
Clock
Generation
/
Mode
Control
Balanced
Digital
Modulation
Unit
(L-ch)
Headphone
Amplifier
(L-ch)
mpl
mnl
pnl
ppl
mpl
mnl
pnl
ppl
Selector / Le
v
e
l Shifter
Le
v
e
l Shifter
Thermal
Protection
Clock
Detection
5V Regulator
VSSBGR
REFA
AVSS
DVDD
DVSS
IC10
: YDA143-EZE2
Stereo 15W digital audio power amplifier
-INPUT
OUTPUT
+INPUT
Q1
Q2
Q3
Q4
Q9
Q8
Q10
Q11
Q12
Q13
Q7
Q6
Q5
V+
A OUTPUT
A -INPUT
A +INPUT
B OUTPUT
B -INPUT
B +INPUT
GND
1
2
3
4
8
7
6
5
V+
IC4
: NJM2904M
Dual operational amplifier
XTO
CK
DT
PSEL
DOUT
DGND
V
DD
D-
D+
V
BUS
ZGND
AGNDL
V
CCL
V
OUT
L
XTI
SSPND
TEST0
TEST1
HID2/MD
HID1/MC
HID0/MS
HOST
V
CCP
PGND
V
COM
AGNDR
V
CCR
V
OUT
R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
IC2
: PCM2704DBR
Stereo audio DAC with USB interface
POINT
1 Pin 28 of IC2
1
Q1
Q2
2
3
5
4
1.
DRAIN 1
2.
SOURCE
3.
DRAIN 2
4.
GATE 2
5.
GATE 1
IC8
: 2SK2145
Audio frequency low noise amplifier
EEPROM
Interface(1)
SSPND
VCCP
VCCL
VCCR
VDD
ZGND
DGND
AGNDR
AGNDL
PGND
VCOM
Analog
PLL
FIFO
DAC
VOUTL
S/PDIF Encoder
XTI
XTO
12 MHz
PLL (
X
8)
96 MHz
Tracker
(SpAct)
USB
Protocol
Controller
Power
Manager
5-V to 3.3-V
Voltage Regulator
Control
Endpoint
ISO-Out
Endpoint
HID
Endpoint
VBUS
USB S
IE
D+
D-
XCVR
DT
HOST
HID0/MS
HID1/MC
CK
VOUTR
DOUT
PSEL
TEST0
TEST1
HID2/MD
(1)AppliestoPCM2704DB
(2)AppliestoPCM2705DB
SPI
Interface(2)
MAIN (2)
MAIN (1)
MAIN (4)
MAIN (5)
MAIN (6)
MAIN (3)
TO BATTERY HOLDER
POWER
ON/OFF
USB
(miniB)
DRIVER
R
STATUS
INDICATOR
DRIVER
L
PORTABLE
USB
SWITCH
USB POWER CONTROL
CURRENT
SENSE
VOLTAGE
CONVERTER 1
(+5V –> +12V)
VOLTAGE
CONVERTER 2
(+12V –> +50V)
RECTIFIER
REGULATOR
LIMITER
/ -
DIGITAL AMPLIFIER
USB DAC
No replacement part available.
サービス部品供給なし
No replacement part available.
サービス部品供給なし
Safety Measures
•
Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such
as wearing insulating gloves.
•
C58 and C78 on the MAIN (1) P.C.B. are dangerous, for a high voltage is retained there even after the power is turned off.
Before the repair work, connect a resistor about 5k-ohm/10W between terminals of the capacitor to force discharge.
After the repair work, also perform force discharge by connecting a resistor about 5k-ohm/10W between terminals of the capacitor.
安全対策
・ この製品の内部には高電圧部分があり危険です。修理の際は、絶縁性の手袋を使用するなどの安全対策を行ってください。
・ MAIN（1）P.C.B.のC58、およびC78には電源OFF後も高電圧が維持されるため危険です。
修理前に5kΩ/10W程度の抵抗をコンデンサの端子間に接続して強制放電してください。
また、修理後も同様に5kΩ/10W程度の抵抗をコンデンサの端子間に接続して強制放電してください。
5 k-ohms
10W
* Voltage measurement condition: USB/AC adapter is used
＊ 電圧測定条件：USB/AC ADAPTER使用時
Содержание NX-U10 - Speaker Sys
Страница 25: ...NX U10 ...
