Yamaha R-S300 Service Manual page 48

A B
R-S300
1
OPERATION (12) P.C.B.
2
U, C, A, G, L models
3
FUNCTION (1)
(W503)
CB21
CB2
4
DOCK
(W301)
WH
WH
POWER TRANSFORMER
5
OPERATION (14) P.C.B.
R model
6
CB8
CB9
7
220V – 240V
VOLTAGE SELECTOR
48
C D
(Side A)
1 7
IC3 IC4
14 8
IC2
CB7 CB6
CB16
POWER TRANSFORMER
(Side A)
POWER TRANSFORMER
CB10
SW1
Circuit No.
C12
C14
110V – 120V
X : NOT USED
O : USED/APPLICABLE
E F G
OPERATION (13) P.C.B.
AC IN
FUNCTION (1)
(W502)
PRV
-15V
AGND_RTN
+15V
POWER TRANSFORMER
U, C, A, G, L
X
O
H I
(Side A)
CB11
CB12
MAIN (1)
(W103)
• Semiconductor Location
Ref no. Location
D13
D14
D24
D26
IC2
IC3
IC4
Q6
Q7
R
Q8
O
Q10
X
J
OPERATION (1)
(W702)
D3
G4
C4
C5
C3
C2
D3
H3
G3
H4
D3