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A
B
C
MAIN
1
2
60.8
58.2
58.2
58.2
58.2
58.2
58.2
3.4
3.4
2.9
2.9
3.4
3
1.8
2.9
2.9
-2.0
W102
-1.8
-1.8
60.2
-60.7
Ground point
4
MAIN (1)
5
M2
to MAIN (3)_W314
6
58.3
58.3
58.3
58.3
7
58.3
58.3
4.1
4.1
3.6
4.1
3.6
-1.4
3.6
3.6
-1.6
-1.6
-1.4
W202
-1.4
60.8
-60.7
Ground point
8
9
MAIN (2)
M2
to MAIN (3)_W315
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.
10
• 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. C308 on MAIN (3) P.C.B..
2. C309 on MAIN (3) P.C.B.
.
3. C335 on MAIN (3) P.C.B..
4. C336 on MAIN (3) P.C.B.
.
D
E
F
MAIN (4)
Idling adjustment
60.8
60.8
60.8
0
60.8
59.8
60.1
Page 66
H4
59.4
58.8
to FRONT (12)_W101A, W101B
58.2
58.2
CB59
CB60
0.6
0.6
0.6
0.6
60.8
0
59.4
-1.8
-50.9
-50.9
50.9
-1.8
-1.8
-51.2
-1.8
-51.4
-51.9
1.8
-51.9
-52.4
#
-52.4
-1.8
-53.1
-1.0
-0.7
#
-52.4
-53.1
-1.8
-1.0
-1.7
#
-0.8
-0.7
#
-0.9
-52.5
-1.8
-52.5
-53.1
-53.1
-53.3
-53.5
60.6
60.6
-53.1
-53.0
-53.3
-53.5
MAIN (5)
Idling adjustment
60.8
60.8
60.7
0
60.2
60.2
59.8
60.2
59.5
Page 66
H8
58.8
58.8
58.8
to FRONT (13)_W201A, W201B
58.3
58.3
0.6
0.6
CB79
CB80
0.6
0.6
OUT L
60.8
0
-59.5
-1.5
-50.9
-50.9
-55.7
-56.7
-1.5
-50.9
-1.5
-51.6
-1.5
-51.6
-52.1
-1.5
-52.1
-52.6
#
-52.5
-1.5
-53.1
-1.5
-1.2
#
-1.5
-52.5
-1.5
-1.5
-53.1
#
-1.2
-1.2
#
-1.5
-1.5
-52.5
-52.5
-53.1
-53.1
-53.1
-53.1
60.6
60.6
-53.1
-53.1
-53.1
-53.1
Note) Those parts marked with "#" are not included in the P.C.B. ass'y.
1. MAIN 3 P.C.B.
2. MAIN 3 P.C.B.
3. MAIN 3 P.C.B.
4. MAIN 3 P.C.B.
G
H
F6
to MAIN (2)_CB75
IC102
0.9
5.1
0
60.7
12.7
-0.7
60.8
-0.7
1.3
1.3
-1.7
50.3
57.4
6.6
6.6
6.6
6.1
6.1
0.5
-1.7
6.1
6.1
-50.9
0
0
-1.7
0.6
0.6
-53.2
-1.7
-51.6
-52.2
-1.7
#
-51.6
-52.2
-52.5
-1.7
-53.1
#
-52.6
-53.1
Head phone DC offset
0.5
CB57
CB58
-45.0
-45.5
F1
to MAIN (1)_CB55
IC202
0.9
5.1
0
60.8
12.6
60.8
-0.6
-0.6
-1.2
-1.2
-1.5
57.4
50.4
6.6
6.6
6.1
6.6
6.0
0.5
6.1
6.0
-50.9
0
0
-1.5
0.5
0
-51.0
-1.5
-51.6
-52.1
-1.5
-51.6
#
-52.5
-52.5
-1.5
-53.1
#
-52.5
-53.1
Head phone DC offset
CB77
CB78
0.5
-45.0
-45.6
I
J
K
CB21
W103
AC89.5
39.8
22.0
21.2
50.8
50.3
1.1
1.1
CB22
22.2
0.6
0
0.5
AC48.5
0
-0.5
1.1
0
To POWER TRANSFORMER
-1.0
0
AC38.5
W104
0
0
-1.0
-23.8
0
0
-1.0
-22.1
-20.9
-1.0
-45.0
W303C
-22.1
-45.5
DC51.4
W303D
-39.8
-45.0
-23.8
-57.3
W303B
DC51.4
W303A
33.8
-52.5
-53.9
MAIN (3)
W203
39.6
22.0
21.2
50.9
CB71
50.4
1.1
1.1
22.0
0.6
1.1
0
0.5
0
1.1
-0.5
0.2
-1.0
0
Page 64
C9
to FRONT (2)_CB504
W204
0
M2
-0.1
to MAIN (3)_W318
-0.1
CB73
CB76
0
-0.5
-1.0
-21.8
-20.9
-1.0
-45.0
-21.8
-45.5
-39.8
-45.0
-57.2
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
L
M
N
A-S2000
W314
C5
to MAIN (1)_CB52
-61.0
61.1
W315
C9
to MAIN (2)_CB72
W318
K8
to MAIN (2)_CB73
W316
Page 66
B3
-32.2
to FRONT (11)_CB34
32.2
Page 62
C6
to FUNCTION (3)_CB25
To POWER TRANSFORMER
AC38.5
AC38.5
AC38.5
24.6
-24.4
0
0
24.6
-10.8
-15.5
4.6
-15.6
4.4
-15.5
IC300
IC302
3.7
-16.5
-16.5
4.4
-10.8
W304C
DC51.4
W304D
0
3.7
3.2
0.6
23.8
-24.5
24.9
0
0
-10.8
-15.5
4.8
-15.6
5.1
-15.5
IC301
IC303
4.8
-16.5
DC51.4
-16.5
4.6
W304B
-10.8
W304A
0
0
5.1
33.8
5.1
5.1
33.6
5.1
0
34.1
5.1
5.1
33.7
33.7
34.1
33.6
-52.8
-52.7
-52.7
-53.9
-53.8
-53.8
IC102, 202: LM61CIZ
Temperature sensor
63
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