Yamaha AS2000BL Service Manual page 62

A B C
A-S2000
FUNCTION 3/3
1
2
3
4
W1
5
Page 64 B4
to FRONT (1)_CB501
6
CB25
Page 63 L3
to MAIN (3)_W317
7
AC29.8
CB23
To POWER TRANSFORMER
8
9
10
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
62
D E F
5.0
5.0
16.6
8.3
16.6
8.4
16.6
5.0
0
0 16.6
5.1 4.9
16.6
0
0
0
0
0
0
0.9 16.6
0
0
0
10.1
8.9 9.8 8.1
9.5
26.4
8.9 8.9
9.5
26.4
8.9 8.9
8.9
8.4
8.9
9.5
0.1
26.4 0
8.9
0.1
8.4
0.8
8.9
0
0
IC51
19.6 12.2
0
19.6
0
1.3
-19.4 19.4
0
5.0
0
-12.0
0
-19.6 -12.0
IC52
G H I
Page 66 B4
to FRONT (14)_W8A, W8B
(R, L models)
To POWER TRANSFORMER
2P
(U, C, T, K, A, B, G, J models)
600mm
AC20.4
AC IN
W10A
W10B POWER ON/OFF switch
12.2
-11.9
-11.9
-11.9
0
W3
12.2
Page 59 I3
to BALANCE_CB203
12.0
12.0
-11.9
0 W4
Page 66 H6
0 to FRONT (13)_CB79
FUNCTION (3)
J K L
IC52: NJM7912FA
IC51: NJM7812FA
Voltage regulator
Voltage regulator
INPUT R1
Q3
R22 R23
Q4
Q10 Q11
D1 D2 R2
Q12 Q13
R24
R3
OUTPUT Q14
Q5 Q16 Q25
Q20
Q15
R13
Q6
R4
Q2 Q21
Q23
Q19 R20
R5 D3
R6 Q22
R14
C1 C2 R17
C3
Q1
Q7 Q17
COMMON Q8 R11 R12 R21 R15 R16
R18
R7
R19
R8 R9
M N
COMMON
OUTPUT
INPUT