Yamaha R-S300 Service Manual page 39

A B
1
FUNCTION (1) P.C.B.
(Side B)
2
3
4
5
6
7
C D E
IC501
1 2
4 3
IC507
1 2
4 3
F G
POINT A XL501 (Pin 13 of IC502) POINT B 1 / IC502 (99 pin, +5M), 2 / IC502 (12 pin, N_RST)
IC502 1
(+5M)
IC502 2
(N_RST)
AC POWER ON
(Connect the power cable)
A
H I
IC502 1
(+5M)
IC502 2
(N_RST)
AC POWER OFF AC POWER ON
(Disconnect the power cable) (Connect the power cable)
B
2 1
1 100
81
80
30
31
8 5
50 51
IC503
1 4
G model
• Semiconductor Location
Ref no. Location
D501 I3
D502 I4
D503 G4
D506 I4
D507 I4
IC501 E3
IC502 H4
IC503 I4
IC507 E3
Q503 F5
Q504 E4
Q505 F3
Q506 G4
Q507 E5
Q508 F5
J
R-S300
39