Yamaha NX-U10 - Speaker Sys, Service Manual

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2
A B C D E F G H I J
1
3
4
5
7
NX-U10
6
16
W5
CB10
CB9
CB8
IC16
IC10
IC5
IC8
IC9
IC7
IC15
IC2
IC1
CB3
W2
W3
JK1
CB1
CB7
CB6
IC12
IC4
CB5
CB2
W4
CB11
C97
R112
R111
C96
MAIN (1) P.C.B.
(Side A)
MAIN (4) P.C.B.
(Side A)
MAIN (5) P.C.B.
(Side A)
MAIN (6) P.C.B.
(Side A)
MAIN (2) P.C.B.
(Side A)
MAIN (3) P.C.B.
(Side A)
DRIVER
R
GND
OFF
COMMON
ON
OFF
COMMON
ON
GND
Lch
Rch
GND Lch Rch
GND
L out
LED
+5V
LED
+5V
R out
L in
R in
GND
GND
D
ATA
+
D
ATA
-
VB
US
DATA+
DATA-
VBUS
DRIVER
L
USB
(miniB)
POWER
ON/OFF
PORTABLE
VOLUME
+ / -
1
26
52
27
1
1
4
8
5
4
1
4
8
5
8
5
1
1 14
28 15
4
8 5
BATTERY HOLDER
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
1
4
5
8
BA
TT+
GND
Rch (+) Rch (-) Lch (+)
Lch (-)
GND
L out
R out
L in
R in
GND
5 k-ohms
10W
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。
■
PRINTED CIRCUIT BOARDS
Ref no. Location
• Semiconductor Location
D3 B3
D6 E4
D15 E3
D16 F3
D21 D3
D22 D3
IC1 G3
IC2 G4
IC4 F3
IC5 E4
IC7 E3
IC8 E3
IC9 E3
IC10 D3
IC12 E3
IC15 F3
IC16 C2
Q2 E4
Q3 E4
Q7 E3
Q8 F3
Q13 D4
Q15 G3