Yamaha KMA-1000 Service Manual page 49

A B C
MAIN 1/2
1
POWER AMP
2
72.3
71.1
3
L
CB401
0
0
4
5
72.3
71.1
6
0
0
7
8
9
10
D E F
KMA-950
Page 44 H7
to FUNCTION (1)_W2
IC401 IC402
5.1 5.1 1.0
1.0
0 0
4.6
5.7
4.6
0 0
5.7
0
0
0
-5.5
0
0
-4.5
-4.5
0 -5.5
-5.0
-4.5
4.6
5.6
5.2
0 0
5.7
0
0
0
-5.5
0
0
-4.5
-4.5
0
-5.5
-5.1
-4.5
IC401, 402: LM61CIZ
Temperature sensor
G H I
0
0
4.6 0
4.6 0
0
5.1
0
0
0
4.6 0
4.6 0
3
CH 2
0
0
17.3
17.3
0
Point e
CH 1 : Emitter of Q433
CH 2 : Collector of Q431
↑ ↑
Power cable on Power cable off
J K
W404
W402
W403
W401
to POWER TRANSFORMER
CB408
AC OUTLETS
W405
W406
CB409
Page 48 I2
to OPERATION (3)_CB562
POWER SUPPLY
POWER CABLE
0
72.3
-72.2
CB411
to POWER TRANSFORMER
0
17.9
0 0
AC28.9
3
CH 1
CB412
-16.7
AC9.0
9.7
4.7
4.7
17.3
0
0
Page 50 A4
to MAIN (2)_W551
↑
Power cable on
L M N
KMA-1000/KMA-950
R
SPEAKERS
L
* All voltages are measured with a 10MΩ/V DC electronic volt meter.
* Components having special characteristics are marked Z and must be replaced
with parts having specifications equal to those originally installed.
* Schematic diagram is subject to change without notice.
49