Panasonic KX-TG2480BXS Service Manual page 85

(1)
VCC 3.3V
(2)
VOUT VIN
5 4
NC VDET
6 3
GND RESET
7 2
Cd NC
8 1
IC300
(3)
(4)
CHG_DET
CHG_CNT1
R170
C154 NC
560
R172 100K
C155
K2700P
Q150
C156 NC
C124 K5600P
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
C280 K0.1 R278 1K
(16)
(17)
(18)
(19)
(20)
(21)
(22)
C292
K6800P
1
2
R293 47K
3
4
C297
R299 C298
R296 270K
(23)
33K K6800P
K2700P C296 K680P
4.5V CONVERTOR
300kHz (or 500kHz)
4.5V
L302
22uH
IC321
4.2V
CE NC
3 4
4.2V
GND
2
VIN VOUT
1 5
Q354
NC
Q161
C158 R167 R159 0 R163 C163 R162
K0.22 1K 47 4700P 39K
C160 NC
R212 R107
18K 18K
R272 150K
R275 560
C272
K2700P
R264 47
Q271
C274 NC
T261
3E3A 4
3
LINE_GND
2
1 6
T281
3E3A 4 R283
3
2
C283 NC
1 6
NC
C289
R258
Q256
R292 R291
1
47K 68K
8 2
VCC
1
7
2 3
- + + -
6
5 3
GND
IC291
R219
10K
4.5V output
Q301
Q382
R382
R383 10K
4.7K
R387 1K
C353 K0.01
Q350
R354
100
Q351
Q104
1 4
Q108
PC141
NC
2 3
Q142
Q145
C151
NC
R151 NC
IC151
R158 R157 R154 47K
1 8
VCC
100K 3.9K R155 27K
2 7
- + + -
3 6
4 5
GND
Q156
R137 10K
Q136
BELL
Q241
Q261
R262
39K
C263 1 4 1 4
PC241
K4700P
(50V)
2 3 2 3
PC242
NC
Q245
Q246
NC
2.7K C285
K0.047
C251
R251 NC
IC251
100K R257 3.9K R254 47K
1 8
VCC
R255 27K
2 7
- + + -
3 6
4 5
GND
R237 10K
Q236
R213 2.2M C213 J100P
R214 2.2M C214 J100P
85
KX-TG2480BXS / KX-TGA248BXS
9~11V
D381
Q381
R381
3.3K
CHARGE PAD
L377
CP2 CHARGE+
6.8uH
L376
CM2 CHRGE-
6.8uH
D306
C101
DG RFG PAG AG
680p(3216)
D101
L101
3 2
33u
4 1
C102 L102 P101
33u
680p(3216) 22
1 4
PC111
2 3
R121 390K C121 K680P
C122 K680P
R122 390K
C202
680P(3216)
D201
P201
L202 33uH
3 2
4 1 22
L201 33uH
C201
680P(3216)
PC211
1 4
2 3
NC
NC : No Components
KX-TG2480 SCHEMATIC DIAGRAM (Base Unit)
REFERENCE
1XX : LINE
3XX : POWER, CHARGE,
RESET, PDWN DET
X01- : POWER SUPPLY
X21- : CHARGE
X41- : RESET, POW DOWN
4XX : MIC, SP
5XX : DSP, E2PROM
6XX : RF I/F
7XX : FLASH, LCD (TAM)
DCP DCP2
DC-TEL JACK
CN101
5 DC+
6 DC-
DCM
DCM2
4 L2R
2 L1T
L1T
3 L1R
1 L2T
RX T/R
-20dBm
TX T/R
L1R
-16dBm
L2R
CN201
TEL JACK 2
1 L2R
2 L2T
L2T