Yamaha MX-D1 Service Manual page 22

Digital power amplifier
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A
B
MX-D1
I BLOCK DIAGRAM (1/2)
1
• See page 37 →
SCHEMATIC DIAGRAM
2
MAIN
• See page 35 →
3
SCHEMATIC DIAGRAM
FUNCTION
Input Amp.
Q103, Q104
Active Power
IN
Control
Q501~Q520
4
5
6
7
22
C
D
Clock Input
IC107
YDA133
IC101
5
+
7
6
6
5
4
Analog
Feedback
Cross
Feedback
Output Current Information
E
F
IC118
YDA134
Q117
6
IC110
15
2.8 MHz
19
18
12V
Real-Time
22
12
Protection
19
Constant-Gain
PLL
18
Modulator Circuit
IC119
YDA134
14
Q119
IC111
6
15
19
18
12V
Real-Time
Protection
G
H
Q118
• See page 35 →
SCHEMATIC DIAGRAM
R195
FUNCTION
Protection / Mute
RY509 (Lch)
RY511 (Rch)
L101
C192
Q120
R201
R196
I
J
+B
0V
–B

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