Yamaha A-S700 Service Manual page 43

A B
1
MAIN (2) P.C.B.
(Side A) (Side A)
POWER TRANSFORMER
2
CB256 CB255
CB253 CB254
U, G models
U, R, T, K, A, B, L models
3
4
CB258
U, K models
5
MAIN (4) P.C.B.
(Side A) (Side A)
MAIN (1)
(CB132)
CB282
6
CB283
CB284
OPERATION (8)
(W811)
FUNCTION (2)
(CB605)
7
C D
MAIN (3) P.C.B.
MAIN (5)
(W291A)(W291B)
1 14
7 8
R, T, K, A, B, G, L, J models
MAIN (1)
(W104)
E F G
(Side A) (Side A)
2
SUBAC
SUBAC
S10
B
PRY
E
DET
POINT B
+5M
1
+5M 1
CB252
/RES 2
POWER cable ON
+5M 1
/RES 2
MAIN (1)
(CB128)
CB281
CB285
POWER TRANSFORMER
H I
MAIN (5) P.C.B.
R, L models
R model
CB294
L model
WH
VOLTAGE SELECTOR
230-240V 1-2/5-6
220V 2-3/6-7
110V 3-4/7-8
120V 4-5/8-1
VOLTAGE
SELECTOR
1 / Pin5, 2 / Pin6 of CB272
BE
MAIN (8)
(W295A)(W295B)
POWER cable OFF
MAIN (8) P.C.B.
POWER cable ON
• Semiconductor Location
Ref no. Location Ref no. Location
D133 D274
D3 E3
D254 D4 D275 E3
D255 C3 IC251 C4
D258 IC252
C4 C3
D259 C3 IC253 D4
D260 C4 Q252 C4
D271 E3 Q254 C3
D272 E3 Q271 E3
D273 Q272
E3 E3
J
A-S700
(Side A) (Side A)
POWER TRANSFORMER
CB293
W291B
VI
YE
OR
BE
W291A
RE
GY
WH
POWER TRANSFORMER
(Side A) (Side A)
MAIN (5)
(W291A)(W291B)
W295A
W295B
AC IN
43