Service manual
CB283
W103
CB281
CB128
CB284
CB285
CB101
CB102
IC102
IC101
W101
W102
CB103
W104
CB106
CB258
CB252
CB257
CB253
IC251
IC253
CB254
CB255 CB256
IC252
CB272
CB271
CB293
W291B
W291A
CB294
W295A
CB291
CB292
W295B
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JK
L MN
A-S700
47
MAIN
1
2
B
1.0
0
6.0
15.2
0
0
0.7
0
-14.9
15.7
-15.5
15.7
-15.5
20.8
20.8
20.7
0.7
20.7
-6.5
-20.8
-20.8
0
0
20.8
0
58.3
0
-58.2
(-46.7)
(46.8)
4.9
4.7
4.7
0
0
0
0
0
0.2
0
4.4
4.4
0
0
4.7
4.9
9.7
(~)
(23.1)
(7.4)
(0)
(0.4)
0
(1.0)
0.2
(0)
(0)
0.9
9.7
0
(0)
(0)
(0)
(0)
(~)
(5.9)
(0)
(23.1)
(5.9)
(7.4)
(1.0)
(3.5)
(3.9)
(3.9)
(0)
(0)
(5.7)
(0)
(0)
(5.7)
0
0.8
0
0
9.7
1.0
-20.8
0
0
0
20.8
20.7
20.8
20.8
0
0
-20.8
-16.2
20.7
-20.8
1.0
0
6.0
AC84.8
AC68.1
AC32.3
58.3
57.7
57.1
0.6
-57.2
-57.2
57.1
0.6
58.3
0
0.6
58.3
0
0
0
57.9
57.7
1.1
1.1
58.3
0.6
57.7
0.6
0
-57.1
-57.2
-1.0
-57.1
-57.1
-57.1
-57.8
-57.2
-56.6
-1.0
-58.3
-0.5
-0.5
-58.3
0
0
0
0
0
-0.5
-58.3
0
-56.6
-57.2
-57.2
-57.8
-57.8
-57.2
-57.1
0
-57.2
-57.8
-57.1
-57.1
0
-57.7
-1.0
-0.4
1.1
-57.7
57.1
57.7
-57.2
-57.1
-1.0
-56.6
-56.6
-57.2
-1.0
-0.5
-58.2
-0.5
0
-58.2
-0.5
0
-58.2
0
57.9
0
0.6
58.2
0
1.1
58.2
0.6
1.1
58.2
0.6
57.1
57.7
1.1
-57.2
-57.2
57.1
57.7
58.2
-57.7
57.1
1.1
-0.4
-1.0
58.3
58.1
0
0.6
AC8.1
Primary ground
OUT L
MAIN (1)
MAIN (3)
MAIN (2)
MAIN (4)
MAIN (6)
AC IN
AC OUTLETS
IMPEDANCE SELECTOR
HIGH/LOW
MAIN (7)
MAIN (8)
MAIN (5)
SPEAKERS
VOLTAGE
SELECTOR
VOLTAGE SELECTOR
230-240V
220V
110V
120V
1-2/5-6
2-3/6-7
3-4/7-8
4-5/8-1
Note) Those parts marked with “#” are not included in the P.C.B. ass’y.
（マーク＃の部品は、基板に含まれません。）
#
#
#
WJ36180 WJ36180 WJ36180 WJ36180 WJ36180 WJ36180 WJ36180
WJ61060
WE10290 WE10290 WE10290 WE10290 WE10290 WE10290 WE10290 WE10290
IC101, 102: LM61CIZ
Temperature sensor
IC252: TC4013BP
Dual D-type flip flop
4
RESET1
1
Q1
6
SET1
5
DATA1
CL
3
CLOCK1
CL
CL
CL
CL
CL
2
Q1
10
RESET2
13
Q2
8
SET2
9
DATA2
7
VSS
14
VDD
11
CLOCK2
12
Q2
CL
CL
CL
CL
CL
CL
1
2
3
4
11
12
13
14
5
6
7
8
9
10
Vss SET2
CK2
VDD
Q2
INPUTS OUTPUTS
*
: Don't care
: Level change
˙ : No change
RESET
L
H
H
L
L
L
Q2
DATA2
RESET2
SET1
RESET1
CK1
Q1
Q1
DATA1
SET
H
L
H
L
L
L
DATA
*
*
*
L
H
*
CK
*
*
*
Qn + 1
H
L
H
L
H
Qn˙
Qn + 1
L
H
H
H
L
Qn˙
POINT B 1 / Pin5, 2 / Pin6 of CB272
1+5M
/RES
2
1+5M
/RES
2
POWER cable ON POWER cable OFF POWER cable ON
to FUNCTION (2)_CB605
R, L models
Page 45
H2
to OPERATION (8)_W811
Page 46 K8
to OPERATION (1)_W801
Page 46
F2
To POWER TRANSFORMER
To POWER TRANSFORMER
To POWER TRANSFORMER
To POWER TRANSFORMER
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。
・ 下記箇所には電源を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）を下記箇所の端子間に接続して放電してください。放電所用時間は約30秒間です。
1. MAIN（1）P.C.B.のC141
2. MAIN（1）P.C.B.のC142
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 positions 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, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. The time required
for discharging is about 30 seconds.
1. C141 on MAIN (1) P.C.B..
2. C142 on MAIN (1) P.C.B.
.
5 k-ohms
10 W
5 k-ohms
10 W