50
KX-FP701ME
6.11. Power Supply Board Section
This power supply board uses the switching regulator method.
[Input Circuit]
The input current goes into the input rectifier circuit through the filter circuit. The filter circuit decreases the noise voltage and the
noise electric field strength.
[Rectifier Circuit]
The input current is rectified by D101, D102, D103 and D104 and charges C106 to make DC voltage. Then it supplies power to
the converter circuit.
[Kick-on voltage circuit]
Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating.
A-B Voltage Wave Form
C-D Voltage Wave Form
E-F
G-H
Voltage Wave Form
0
0
0
Input
Circuit
AC
Input
Surge
Absorber
Circuit
G
H
24V
E
IC101
D110
R104
F
9~6V
GND
Control
Circuit
Kick-on
Voltage
Circuit
Converter
Circuit
C
D
24V
Output
Circuit
+
-
Rectifier
Circuit
A
B
C106
Error Detecting
Circuit
Block Diagram
Surge
Absorber
Circuit
Q101
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