Yamaha RX-A4A - OPERATION; Side A; (1); (2)

JIHGFEDCBA
1
2
3
4
5
6
7
66
RX-A4A
W4002
CB405
W4001B
IC404
W4001A
IC405
IC402
CB402CB401
CB403
CB404
IC401
IC403
W4101
CB411
5
1
3
4
C
A
REF
5
8
4
1
AC IN
DIGITAL
(CB80)
+3.3M
DGND
ACPWR_DET
PRY
ACDC_FAN_EN
-
AMPPOWER (W3009)
5.5V
GND
DIGITAL
(CB121)
AMPPOWER
(W3028)
DC_TRG1 DC_TRG2
REM_IN2
DGND
+3.3M
+20TRG
TRG_GND TRG_GND
DIGITAL (CB122)
GND5.5V
REMOTE
OUT IN
TRIGGER OUT
1 / 2
POWER
TRANSFORMER
5 k-ohms
10 W
5 k-ohms
10 W
5 k-ohms
10 W
J, U, C, V, P, S models
J, U, C, V, P, S models
R, T, K, A, B, G, L, F models
R, T, K, A, B, G, L, F models
• Semiconductor Location
Ref no. Location
D4002 C5
D4005 D5
D4006 D5
D4007 E2
D4008 E2
D4009 E2
D4010 E2
D4011 D5
D4012 D4
D4013 E2
D4014 E2
D4015 E3
D4016 E2
D4017 E2
D4018 E3
D4101 H3
D4102 H3
D4103 H3
D4104 H3
D4105 H3
IC401 D6
IC402 E2
IC403 D5
IC404 D5
IC405 E3
Q4001 C5
Q4002 E3
Q4003 E3
Q4101 I3
Q4102 I3
Q4103 I3
Q4104 I3
Q4105 I3
Q4106 I3
Q4107 I3
Q4108 H3
OPERATION (1)
(Side A)
OPERATION (2)
(Side A)
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.
C4006 on OPERATION (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kΩ /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。
OPERATION (1) P.C.B. の C4006