Panasonic KX-FL612CX - Power Supply Board Section

7.16. POWER SUPPLY BOARD SECTION
This power supply board uses the switching regulator method.
Input
Circuit
AC
Input
Surge
absorber
circuit
G
H
5V
24V
Kick-on
Voltage
Circuit
E
IC101
F
PGND
DGND
HTRCTL
Control
Circuit
R106
R107
Converter
Circuit
C
D
5V
Output
Circuit
24V
Output
Circuit
+
-
Rectifier
Circuit
A
B
C106
Error Detecting
Circuit
Surge
absorber
circuit
O.C.L
Over voltage
Q101
A-B Voltage Wave Form
C-D Voltage Wave Form
E-F
G-H
Voltage Wave Form
0
0
0
CN101
CN102
T101
PC101
IC201
Triac
SCR101
Heat Lamp
PDWN
Photo Trioc
Caupler PC102
Block Diagram
Freq. SW Circuit
PC103
[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~ 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.
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KX-FL612CX / KX-FL612CX-S