Yamaha AV-S77 Service Manual page 33

A B
1
I NX-SW77 PRINTED CIRCUIT BOARD (Foil side)
From POWER (A)
CN2
2
3
4
AMP (E) P. C. B.
(Lead Type Device)
To AMP (D)
CN8
To AMP (C)
CN7
To AMP (D)
5 CN6
6
7
SYSTEM CONNECTOR B
(WHITE 13P)
C D
(Lead Type Device)
AMP (C) P. C. B.
From
AMP (E)
CA6
From POWER (B)
CN10
From POWER (A)
CN3
To
AMP (D)
CN5
SYSTEM CONNECTOR A
(BLACK 8P)
E F
AMP (D) P. C. B.
To
AMP (F)
CA4
To
AMP (E)
CA6
From
AMP (F)
CA5
AMP (F) P. C. B.
(Lead Type Device)
PHONES SPEAKERS
38
G H
(Lead Type Device)
From AMP (E)
From POWER (A)
CA6
CN11
From AMP (D)
CN4
I J
AV-S77
• Semiconductor Location
Ref. No. Location
D6 E3
D7 E3
D8 D3
D9 E3
D10 E3
D11 E3
D16 H3
D19 E3
D20 E3
D21 G3
D22 D2
D23 D2
IC1 H4
IC2 D4
IC3 E4
IC4 D3
IC8 H2
IC9 H2
IC10 G4
IC11 G2
IC12 G2
IC13 D2
-B1
AMPG
+B1
-12V
GND
+12V
From
POWER (A)
CN1
• Semiconductor Location
Ref. No. Location
Q1 H3
Q2 G4
Q3 G4
Q4 G3
Q5 G4
Q6 G3
Q7 H4
Q8 H4
Q9 H3
Q10 H3
Q11 E4
Q12 E3
Q13 E3
Q14 E3
Q15 E3
Q16 C4
Q17 C4
Q18 D3
Q19 D3
Q21 G5
Q22 G5
Q23 D2
39