Yamaha YSP-900 Service Manual page 58

A B C
YSP-900
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
TW19 TW20
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
3.2 0 3.2
2.5 0 2.5
2.2 0 2.2 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 5.1
5.0 5.0
2.4 0 2.4 0
5.0 5.0
2.5 2.5 2.5
0
3.2 3.2
2.5 0 2.5
0
2.2 2.2
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 5.1
5.0 5.0
TW21 TW16 TW17 TW18 TW13 TW14 TW15 TW10
G H
DRIVER
(WOOFER_L)
No replacement part available.
サービス部品供給なし
0
2.4 2.4
5.0 5.0
2.5 2.5 2.5 2.5
0 3.2 0 3.2
0 2.5 0 2.5
2.2 0 2.2
0 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 2.5
0 0
3.2 3.2
0 2.5 0 2.5
0 0
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
TW11 TW12 TW7 TW8 TW9 TW4 TW5 TW6
DRIVER x 21
(TWEETER)
IC703, 704: SN74AHCT541PWR
Octal buffers/drivers
OE1 V
1 20 CC
A1 OE2
2 19 1
OE1
A2 3 18 Y1 19
OE2
A3 4 17 Y2
A4 5 16 Y3
2
A1
A5 6 15 Y4
A6 7 14 Y5
To Seven Other Channels
A7 8 13 Y6
A8 9 12 Y7
GND 10 11 Y8
I J K
DRIVER
(WOOFER_R)
No replacement part available.
サービス部品供給なし
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
0 0
2.2 2.2
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
TW1 TW2 TW3
IC711, 716: YDA138
Digital audio power amplifier
18
Y1
L M N
Page 60 J3
to INPUT(1)_CB504
5.1
5.0
AMP
IC701, 702, 705, 706, 709, 710, 712-715, 717: YDA139
Digital audio power amplifier