Panasonic KX-TG2873BXS, Service Manual

Page: 75 / 103

75
KX-TG2873BXS/KX-TGA280BXS
Note:
(*6) (*7) Refer to Input Level (P.77)
about
400 mVpp
(at Vol. Max)
2.2 F
2.2K
2.2 F-40dBm
(600 )
+2.5V
+2.5V
+1.8V
+3.4V
VBAT
VBAT
( )
D460 NC
+1.8V
+2.5V
+3.4V
IC460
NC
1
CD
2
+VREF
3
+VIN
4
-VIN
5
VOUT1
6
V+
7
GND
8
VOUT2
RFCLK
C700 D10p C704
M4.7u
J68p
C708
D10p C706
C462
( )
NC
D10p C703
C461
( )
NC
C419
( )
NC
D10p C711
D10p C702
C305
K1u
D10p C709
C306
K1u
C464
( )
NC
C463
( )
NC
C418
( )
NC
D10p C701
R706
( )
NC
R50
10K
R704
47K
R716
( )
NC
R709 100K
R401
2.7K
R461
( )
NC
R51
10K
R460
( )
NC
R705
6.8K
1005
R408
33
R711 100K
C460
( )
NC
R710
1K
C304 3216 Z22u
C417 D10p
MIC
1 HSMIC(+)
2 HSMIC(-)
R400
2.7K
R462 ( )
NC
R450
( )
( )
NC
R451 NC
R52
10K
J15p
C705
( )
C465 NC
DG DG DG
DG
DG
DG
RFG RFG
RFG
RFG RFG
RFG
RFG RFG
RFG RFG
RFG
RFG
RFG
RFG RFG
RFG RFG
RFG
DG DG
DG
DG DG
DG
DG DG
DG
DG DG
DG
DG RFG
RFG
DG
DG
TP700
1 2
RFG
R405
1K
1K
R415
R402
100
100
R414
IC301
1
ON/OFF
2
VSS
3
NC
4
VIN
5
VOUT
DG
R409
33
VDDPA
RCV1-
-
RCV1+
+
SP1
SP2
C405
K0.1u
C407
K0.1u
C714
J270p
D400
3.3V
D401
3.3V
DG
C423
( )
NC
DG
C424
( )
NC
D402
3.3V
D403
3.3V
VDD5
K1u
C307
K1u
C308
IC300
1
VOUT
2
GND
3
VDD
4
CE
5
NC
DG
( )
C451
NC
( )
C450
NC
( )
C466
NC
L400
L401
C302
6.3V330u
C303
6.3V330u
L450 10uH
L451 10uH
R412
220
R413
220
IC2
64K
1
A0
2
A1
3
A2
4
GND
5 SDA
6
SCL
7
WP
8
VCC
B2.4p
C712
( ) C715
NC
( )
C716
NC
RFG
RFG
C422
K0.01u
( )
C421
NC
AG
R713
910
C415
K0.1u
Q301
Q302
6.3V22u
C420
K1.0u
C309
K1.0u
C310
C710
B1.2p
C713
K0.1u
IC700
1 GND1
2 GND2
3 GND3
4 TXDATA
5 RSSI
6 VCC_OC
7 GND4
8 SYCL
9 SYDA
10 SYEN
11 12
SYRI
13
GND5
14
GND6
15
GND7
16
GND8
17 GND9
18 GND10
19 RXDA
20 GND11
21 GND12
22 PSEL
23 PAON
24 GND13
25 VCC_PA
26 GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
ANT
32
GND19
CD_AMP
DC_CTL
DC_I
CHARGE
STOP_CHARGE
RXDA
RXDSG
TXDA
WP
SYCL
SYDA
SYEN
RSSI
SYRI
PAON
Not Mounted
For
SPEAKER
Land for
soldering
Land for
soldering
For Antenna
ANT_1 ANT_2
For Receiver
Land for
soldering
RXDSG
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
KX-TGA280 SCHEMATIC DIAGRAM (Cordless Handset)
NC: No Components
TX (cordless handset)
RX (cordless handset)
(*6)
(*7)