Yamaha YSP-800 Service Manual page 58

A B C
YSP-800
SCHEMATIC DIAGRAM (AMP)
1
2
3
0
4
2.5
0
0
0
0
5.1
0.2
0.2
0
5
0
2.5
6 0
0
0
0
5.1
0.2
0.2
0
7
8
9
10
# All voltages are measured with a 10MΩ/V DC electronic volt meter.
# 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.
58
D E F
Page 57 J7
to DSP_CB11
0 0
2.4 2.4
5.0 5.0
2.5 2.5 2.5 2.5
3.2 0 3.2
2.5 0 2.5 0
2.2 0 2.2 0
0 0
2.5 2.5
5.1 5.1 5.1 5.1
0.2 0.2 0.2 0.2
0.2 0.2 0.2 0.2
0 0 0 0
5.1 5.0 5.1 5.0
2.4 0 2.4 0
5.0 5.0
2.5 2.5 2.5 2.5
0
3.2 3.2
2.5 0 2.5 0
2.2 2.2
0 0
2.5 0 2.5 0
5.1 5.1 5.1 5.1
0.2 0.2 0.2 0.2
0.2 0.2 0.2 0.2
0 0 0 0
5.1 5.1
5.0 5.0
IC703, 704:
OCTAL BUFFERS/DRIVERS
OE1
GND
G H
0
2.4 2.4
5.0 5.0
2.5 2.5 2.5
0 3.2 0 3.2
2.5 0 2.5
2.2 0 2.2
0
2.5 2.5
5.1 5.1 5.1
0.2 0.2 0.2
0.2 0.2 0.2
0 0 0
5.1 5.0 5.1 5.0
2.4 0 2.4
5.0 5.0
2.5 2.5 2.5
0 0
3.2 3.2
2.5 0 2.5
2.2 2.2
0
2.5 0 2.5
5.1 5.1 5.1
0.2 0.2 0.2
0.2 0.2 0.2
0 0 0
5.1
5.0
5.1
5.0
SN74AHCT541PWR IC711, 716: YDA138
Digital audio power amplifier
1 20 V CC
A1 2 19 OE2
1
OE1
A2 3 18 Y1
19
OE2
A3 17 Y2
4
A4 Y3
5 16
2 18
A1 Y1
A5 6 15 Y4
A6 7 14 Y5
To Seven Other Channels
A7 8 13 Y6
A8 9 12 Y7
10 11 Y8
I J K
0
2.4
5.0
2.5 2.5
0 3.2
0 2.5
0 2.2
0
2.5
5.1 5.1
0.2 0.2
0.2 0.2
0 0
5.1 5.0
0
0 2.4 0 2.4
5.0 5.0
2.5 2.5 2.5 2.5
0 0
3.2 3.2
0 2.5 0 2.5
2.2 2.2
0 0
0 2.5 0 2.5
5.1 5.1 5.1 5.1
0.2
0.2 0.2 0.2
0.2 0.2 0.2 0.2
0 0 0 0
5.1 5.0
IC701, 702, 705, 706, 709, 710, 712~715,
Digital audio power amplifier
L M N
Page 60 J3
to INPUT(1)_CB504
5.1 5.0
AMP
717: YDA139