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KX-TEB308CA, KX-TE82460X, KX-TE82493X, KX-A227X - Panasonic PBX Service Manual (repair manual). Page 8

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8
KX-TEB308CA/KX-TE82460X/KX-TE82493X/KX-A227X
4.4.
CO Block Diagram
4.5.
Power Supply Unit Block Diagram
KX-TE
B308CA POWER SUPPLY UNIT BLOCK DIAGRAM
AC IN
L
FUSE
Surge
Protector
Noise
Control
Over
Current
Detection
Circuit
Filter
Rectifier
Primary
Secondary
&
Smoother
Rectifier
Voltage
Detection
&
Smoother
N
FG
Battery
+24V
+27V
+15V
GND
GND
SW
Back-up
Adaptor
DC-DC
Converter
+3.3V
DC-DC
Converter
CN1
F1
Z1
L1
D10 ~ D13
C5
IC1
PC1
Q1
R30, R31
D101, C101
IC101
RL501
Q503
IC201
IC301
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