Yamaha A-S2000 - Amplifier, Service Manual

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2
A B C D E F G H I J
1
3
4
5
7
A-S2000
6
42
W4004
CB402
CB403
CB404
CB401
CB405 CB406
IC407
IC408
IC409
IC403
IC404 IC405
IC406
IC413
IC402 IC401
IC410
IC411
IC412
(Side A) FUNCTION (2) P.C.B.
R
Y
_DIR
MG R
Y
_BYP
EV1_MT EV1_CE EV2_CE EV1_CL EV2_CL EV1_D
A
EV2_D
A
MT_M -12R
Y
SW_TRE SW_BAS
FRONT (1)
(CB517)
L+
LINE1+25V LINE1+25V LINE2-25V LINE2+25V LINE2A
GND
V
O
L1-12V
V
O
L2+12V
V
O
L2-12V
V
O
L1+12V
V
O
LGND
V
O
LGND
LINE1-25V LINE1GND LINE1GND 60V
GND
60V
GND
NC OPE+12 A
GND
A
GND
OPE-12 12R
Y
LINE1-25V LINE1GND LINE1GND 60V
GND
60V
GND
R+ R- L- A
GND
A
GND
INR+
INL-
INL+
E
INR-
GND
A
GND
FUNCTION (1)
(W3001)
FRONT (11)
(W6)
FUNCTION (1)
(W3003)
MAIN (1)
(W102)
FUNCTION (1)
(W3002)
MAIN (2)
(W202) MBAL_R- PREOUT_L PREOUT_R MBAL_L- A
GND
A
GND
A
GND
A
GND
A
GND
1 11
12
22
23 33
34
44
1 11
12
22
23 33
34
44
1
1
4 5
8
1
4 5
8 1
4 5
8 1
4 5
8
1
4
5
8
1
4 5
8
1
4
5
8
11
12
22
23 33
34
44
1 11
12
22
23 33
34
44
1 11
12
22
23 33
34
44
1 11
12
22
23 33
34
44
• Semiconductor Location
D4037 F6
D4038 F6
D4047 H6
D4048 H6
IC401 B5
IC402 C5
IC403 D5
IC404 G5
IC405 H5
IC406 I5
IC407 B4
IC408 C4
IC409 D4
IC410 G4
IC411 H4
IC412 I4
Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location Ref no. Location
IC413 G6
Q401 B5
Q4001 C6
Q4002 I6
Q4003 D5
Q4004 E5
Q4005 I5
Q4006 J5
Q4007 C6
Q4008 I6
Q4009 B5
Q4010 G5
Q4011 G5
Q4012 D5
Q4013 E5
Q4014 G5
Q4015 H5
Q4016 C5
Q4017 E5
Q4018 G5
Q4019 H5
Q4020 C6
Q4021 E5
Q4022 G5
Q4023 H5
Q4024 D5
Q4025 E5
Q4026 G5
Q4027 H5
Q4028 C6
Q4029 D6
Q4030 D6
Q4031 E6
Q4032 F6
Q4033 G6
Q4034 G6
Q4035 H6
Q4036 C6
Q4037 D6
Q4038 D6
Q4039 E6
Q4040 F6
Q4041 G6
Q4042 G6
Q4043 H6
Q4044 F4
Q4045 F4
Q4046 F5
Q4047 E5
Q4048 E4
Q4049 E4
Q4050 C6
Q4051 B6
Q4052 I6
Q4053 H6