Read Panasonic KX-NT543RU / KX-NT543RU-B / KX-NT546RU / KX-NT546RU-B (serv.man2) Service Manual online
14
KX-NT543RU/KX-NT543RU-B/KX-NT546RU/KX-NT546RU-B
4.2.9.
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
JK402
JK401
T403
T402
D409,D41
1
L41
1
C312
D305
IC303
IC301
IC402
D401
BBIC
IC103
IC101
IC205
JK202
JK203
IC503
IC401
IC504
(P
o
E
)
Dig
ital
Part
Am
plif
ier
Par
t
PH
Y
Fl
a
s
h
SDRA
M
RJ45
(P
C)
Ba
ck
u
p
44
57
V
PoE_G
te
rm
in
a
to
r
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
HEA
DS
E
T
)
Cl
as
s D Am
p
fo
r Spea
k
e
r
DCD
C
(3.3V
)
DCD
C
(5
V
)
PoE
DCD
C
+
-
N
o
is
e F
ilt
er
Reg
(3.3V
)
Spea
k
e
r
MIC
ASIC
Headset
Handset
LC
D
Bac
kli
ght
LEDLED
KE
Y
LCD
EH
S(
PS
B)
LCD_BO
X
Ba
cku
p
Analog Par
t
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