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A
B
WXA-50/WXC-50
■ PRINTED CIRCUIT BOARDS
1
MAIN (1)
(Side A)
2
OPT IN
3
NETWORK
4
USB
IN
L/R
AUX
5
OUT
L/R
SUBWOOFER
6
7
38
C
D
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.
•
Note that the capacitors indicated below are dangerous even after the power is turned off because an electric charge remains and a
high voltage continues to exist there. Before starting any repair work, connect a discharging resistor (5 k-ohms/10 W) to the terminals
of each capacitor indicated below to discharge electricity. The time required for discharging is about 30 seconds per each.
C510–512 on MAIN (1) P.C.B.
No replacement part available.
サービス部品供給なし
(For factory)
CB5
1
4
3
2
CB204
24
17
16
25
32
9
8
1
IC205
IC215
1
16
4
1
8
9
5
8
1
20
24
17
25
16
10
11
3
4
IC219
32
9
5
1
1
8
1
5
3
4
1
16
5
4
8
9
8
1
37
48
1
36
12
25
13
24
W201
Amplifier and power module
FAN_CTRL
FAN_LOCK
AMP_OLV
+15V
SPRY_CTRL
DGND
Amplifier and power module
(P102)
MAIN (5)
(W902)
E
F
WXA-50
Network module
IC8
1
5
2
3
1
4
3
4
1
5
2
4
3
5
4
IC5
1
3
8
5
IC213
89
132
88
133
1
4
6
4
1 3
IC4
IC1
176
45
1
44
1
5
3
3
1
4
1
5
IC209
4
1
3
2
4
5
IC201
3
4
1
4
IC7
3
2
5
4
1
8
1
8
4
5
W1
5 k-ohms
10 W
(P103)
AC_PWR
DC_TRG_IN
DC_TRG_OUT
+15V
SW_WL_BT
SW_WL_ALL
DGND
+3.3M
REM_IN2
THM_MON
MAIN (2)
(CB603)
G
H
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。
・ 下記のコンデンサには電源を OFF にした後も電荷が残り、高電圧が維持されており危険です。修理作業前に放電用抵抗
（5 k Ω /10 W）を下記の各コンデンサの端子間に接続して放電してください。放電所用時間は各々約 30 秒間です。
MAIN（1）P.C.B. の C510 〜 512
Amplifier and power module
(P100)
W502A
W502B
MAIN (2)
(CB601, CB602)
5 k-ohms
10 W
5 k-ohms
10 W
DC-DC converter
VOL_RB
VOL_RA
LED_BT
LED_NET
–
LED_SRC_R
LED_SRC_G
LED_SRC_B
REM_IN1
SW_PLAY
SW_SORCE
SW_STDBY
+3.3M
DGND
+5V
MAIN (3)
(CB701)
I
J
• Semiconductor Location
Ref no. Location
Ref no. Location
D1
F3
IC210
E5
IC211
C4
D3
F3
D4
E2
IC212
E4
D11
C6
IC213
F3
D201
C4
IC215
D3
D202
C4
IC216
D3
D203
D5
IC219
D4
D204
D5
IC220
D4
D501
H4
IC222
D4
D502
H4
IC223
D5
IC228
D5
D503
G4
D504
G4
IC501
F2
D505
G4
IC502
F3
D506
G4
Q1
E3
D507
G4
Q2
E3
D508
G3
Q3
F4
D509
G3
Q4
E2
D510
G3
Q5
E3
IC1
E4
Q6
F3
Q203
E5
IC4
E3
IC5
F3
Q204
C5
IC6
F5
Q205
C5
IC7
F5
Q208
E6
IC8
E2
Q209
E6
IC201
E5
Q211
E6
IC203
D4
Q212
E6
IC205
D3
Q502
G4
IC206
D3
Q503
G4
Q504
G4
IC208
E5
IC209
E4
Q505
F3
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