Block Diagrams - Yamaha MX-D1 - Amplifier Owner's Manual

BLOCK DIAGRAMS

The MX-D1 is a high-power, high-performance PWM (Pulse Width Modulation) digital stereo power amp, utilizing Yamaha's
latest digital power amplifier and switching power supply technologies.
The following block diagrams show the amplifier and power supply circuits.
Amplifier Block Diagram
Input amp
IN
Analog
feedback
Power Supply Block Diagram
Choke
Line filter
Inrush
AC IN
protection circuit
E-6
2.8 MHz
clock input
YDA133
Closed-loop
feedback
100V(on)
200V(off)
Sub-
transformer
Protection circuit
Right-channel power supply
YDA134
Real-time
protection
L
C
YDA134
Real-time
protection
+
0V
-
Driver
Isolator
2.8MHz
88kHz
(amp)
Microcomputer
OSC
88kHz
2.8MHz
(amp)
+B
Protection
/mute
SPOUT
0V
-B
For op-amps
and LSI
+B
OV
-B
Magnetically
-coupled
rectifier circuit
External interface