IC102
CB107
W1
05
CB1
08
W1
03
W1
02
SW1
02
CB101
SW1
0
1
CB104
W104
IC101
CB106
Q124A
Q124C
Q123A
Q123C
POWER TRANSFORMER
+
ON/OFF
OUT
PO
WER
MANA
GEMENT
HIGH/L
O
W
IMPED
ANCE
SELECT
OR
SUB
W
OOFER
-
+
-
R
L
A/B
SPEAKERS
A-S300
MAIN (1) P.C.B.
(Side A)
MAIN (4) P.C.B.
(Side A)
MAIN (3) P.C.B.
(Side A)
A-S300
T, A, B, G, L models
PREOUT_L
AGND
PREOUT_R
+15V
-15V
AGND
HPR
E R E L
E
HPL PR
V
-1
5UNRE
G
+1
5UNRE
G
-VP_UNRE
G E
+VP_UNRE
G
E
AC
L
AC
L
AC
H
AC
H
5 k-ohms
10
W
5 k-ohms
10
W
PREMT
SWMT
MG
+5S
POW_MGT
THM
THM
SPBRY
SPARY
HPRY
PRI
PRD
GND
OUT
VC
C
VC
C
GND
OUT
OPERATION (2)
(W803)
FUNCTION (1)
(CB506)
OPERATION (2)
(W804)
MAIN (6)
(CB13)
Note) Those parts marked with “#” are not included in the P.C.B. ass’y.
(マーク#の部品は、シートに含まれません。)
#
#
#
#
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
48
A-S500/A-S300
• Semiconductor Location
Ref no. Location
D101
C5
D102
C3
D103
D4
D104
D4
D105
D4
D106
D4
D107
E4
D108
E4
D111
I6
D115
H6
D116
H7
IC101
E7
IC102
E2
Q101
C4
Q102
C4
Q103
C5
Q104
C4
Q105
D4
Q106
D4
Q107
D4
Q108
D4
Q109
D4
Q110
D4
Q111
C5
Q112
C3
Q113
D5
Q114
D5
Q115
D3
Q116
D3
Q117
E5
Q118
E3
Q119A
E5
Q119C
F5
Q120A
E3
Q120C
F3
Q127
H6
Q129
H6
Q137
H6
A-S500
A-S300
注意)
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 C134、C135
Notes)
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 (5k-ohms/10W) to the terminals of each capacitor indicated below to discharge electricity. The time required for discharging is
about 30 seconds per each.
C134, C135 on MAIN (1) P.C.B.
Summary of Contents for A-S500
Page 5: ...5 A S500 A S300 A S500 A S300 A S500 A model A S500 B model A S500 G model A S500 ...
Page 6: ...6 A S500 A S300 A S500 A S300 A S500 L model A S300 R model A S300 T model A S500 A S300 ...
Page 7: ...7 A S500 A S300 A S500 A S300 A S300 A model A S300 B model A S300 G model A S300 ...
Page 8: ...8 A S500 A S300 A S500 A S300 A S300 J model A S300 L model A S300 ...
Page 80: ...81 A S500 A S300 A S500 A S300 MEMO ...
Page 81: ...A S500 A S300 ...