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14
KX-UT113RU/KX-UT113RU-B/KX-UT123RU/KX-UT123RU-B
4.2.8.
Power Supply Circuit
Ope
AC
Adaptor
9V/750
m
A
P
W
RGND
9V9V
12V12V
IC501
VC
C
(3
.3
V
)
VC
C
(3
.3
V
)
V
CCA
V
CCA
V
CCP
A
V
CCP
A
DG
AG
5V5V
RJ45
(P
o
E
)
Dig
ital
Part
Am
plif
ier
Par
t
PH
Y
Fl
a
s
h
SDRA
M
RJ45
(P
C)
Ba
cku
p
44
∼
57
V
PoE_G
te
rm
in
at
or
te
rm
inat
or
PoE_AG
(P
ro
te
c
ti
o
n ag
a
in
s
t no
is
e
)
A
m
p for M
icrophone
(SP-
PHO
NE,
HAN
DS
ET
and H
E
A
D
S
E
T
)
Cl
as
s D Am
p
fo
r Sp
e
a
ke
r
DCD
C
(3.3V
)
DCD
C
(5
V
)
PoE
DCD
C
+
-
No
is
e
F
ilte
r
Reg
(3.3V
)
Spea
k
e
r
MIC
ASIC
Headset
Handset
LC
D
Bac
kli
ght
LEDLED
KE
Y
LCD
LCD_BO
X
Ba
cku
p
Analog Par
t
JK402
JK401
T402
T403
D305
C312
IC303
D409,D411
D401
L411
IC301
IC402
IC101
IC103
IC401
IC504
IC503
IC205
JK202
BBIC
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