Yamaha AV-S70 Service Manual page 27

A
Q Q
3 7 6 3 1 5 1 5 0
AV-S70 PRINTED CIRCUIT BOARD
1
AMP ( B ) P. C. B.
(Component side)
2
3
R-OUT-GND
T E
L 1 3 9 4 2 2 9 6 5 1 3
–V
POWER–GND
+V
L–OUT–GND
4
FROM : AMP (C)
5
Semiconductor Location
Ref. No. Location Ref. No. Location
D501 B3 IC501 B2
w w w
IC502 B3
IC503 A2
.
6
B C
AMP ( B ) P. C. B.
GNDB
–15V
+15V
TruBass
Ref. No. Location
Q501 A4
Q502 B4
Q503 B4
Q504 B4
x a o
Q505 B3 y
Q506 B2
i
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8
AMP ( C ) P. C. B.
(Foil side)
SW
OUTPUT
RE
+15V
–15-V
RE
Q Q
3 7 6 3
Semiconductor Location
Ref. No. Location Ref. No.
D602 E4 IC601
D603 E3 IC602
IC603
IC604
u 1 6 3
IC605
.
28
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F
2 4
9 9 8
(Component side)
AMP ( C ) P. C. B.
SYSTEM
CONECTOR
MUTE
+15V
–15V
SP–RY
SW–PRT
PRE–OUT
TruBass
AMP–PRT
B–BST
NIGHT
1 5 1 5 0 8 9 2 4
L
RL
R
G
RR
SW
G
Location Ref. No. Location
G3 Q601 F3
m
G3 Q602 F3
G4 Q603 E2
G4 Q604 F3
c o
G3 Q606 E4
Q607 E4
G H
AV-S70/NX-SW70
2
9 9
(Foil side)
9 8 2 9 9
29