Yamaha WXA-50, Service Manual

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CB204
IC205
IC215
IC219
IC4
CB5
IC8
IC1
W502B
W502A
IC209
IC201
IC7
W1
W201
IC5
IC213
IC21
6
IC223
IC208
IC21
0
W2
IC21
2
CB50
1
CB1
IC6
IC50
1
IC502
IC203
IC222
IC228
CB2
CB20
1
CB202
IC21
1
IC220
IC206
MAIN (1)
(Side A)
No replacement part available.
サービス部品供給なし
MAIN (2)
(CB601, CB602)
Amplifier and power module
(P100)
Amplifier and power module
(P103)
Amplifier and power module
(P102)
MAIN (2)
(CB603)
MAIN (5)
(W902)
MAIN (3)
(CB701)
NETWORK
USB
AUX
IN
OUT
L/R
L/R
OPT IN
SUBWOOFER
Network module
DC-DC converter
(For factory)
DGND
+3.3M
+5V
SW_STDBY
SW_PLAY
SW_SORCE
LED_SRC_G
LED_SRC_R
LED_SRC_B
REM_IN1
VOL_RA
LED_NET
LED_BT
VOL_RB
–
+15V
DGND
SPRY_CTRL
AMP_OLV
FAN_CTRL
FAN_LOCK
BTL Sync
AMP_EN PRT_OC
PRT_THM
PRE_R(Ch2)
AGNDR
AGNDL
PRE_L(Ch1)
DC_TRG_OUT
SW_WL_ALL
REM_IN2
SW_WL_BT
THM_MON
DGND
+3.3M
AC_PWR
+15V
DC_TRG_IN
Vdaux
GND
Vsaux
1
132
44
45
88
176
133
89
1
1
1
1
2
3
4
4
5
8
3
4 5
3
4
5
1
1
3
4
5
3
4
5
1
1
1
1
1
3 4
5
4
1
1
1
1
10
20
11
4
8 5
8
16
9
8
24 17
9
16
32
25
1
8
24 17
9
16
32
25
8
8
5
12
13 24
25
36
9
16
37
48
2 3
4
4
3
2
1
1
3
4
5
1
3
4 5
1 4
8 5
1
4
8
5
1
3
4 6
1
3
2
4
5
1
2
3
4
5 k-ohms
10 W
5 k-ohms
10 W
5 k-ohms
10 W
A B C D E F G H I J
1
2
3
4
5
6
7
38
WXA-50/WXC-50
• Semiconductor Location
■
PRINTED CIRCUIT BOARDS
WXA-50
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.
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
Ref no. Location
D1 F3
D3 F3
D4 E2
D11 C6
D201 C4
D202 C4
D203 D5
D204 D5
D501 H4
D502 H4
D503 G4
D504 G4
D505 G4
D506 G4
D507 G4
D508 G3
D509 G3
D510 G3
IC1 E4
IC4 E3
IC5 F3
IC6 F5
IC7 F5
IC8 E2
IC201 E5
IC203 D4
IC205 D3
IC206 D3
IC208 E5
IC209 E4
Ref no. Location
IC210 E5
IC211 C4
IC212 E4
IC213 F3
IC215 D3
IC216 D3
IC219 D4
IC220 D4
IC222 D4
IC223 D5
IC228 D5
IC501 F2
IC502 F3
Q1 E3
Q2 E3
Q3 F4
Q4 E2
Q5 E3
Q6 F3
Q203 E5
Q204 C5
Q205 C5
Q208 E6
Q209 E6
Q211 E6
Q212 E6
Q502 G4
Q503 G4
Q504 G4
Q505 F3