Panasonic KX-TG5771BXS Service Manual page 87

4.0V
(1)
IC331
(2)
VOUT
5
NC2
6
GND
7
CD
8
(3)
RX
125mVp-p
(4)
C173
R172
K2700P(50V)
3
2
(5)
(6)
(7)
(8)
(9)
C185
R183 2.2k
(10)
C183 NC K0.018
(11)
(12)
(13)
(14)
4.0V CONVERTOR
Q300
L300 22uH
VIN
4
VDET
3
*RESET
2
NC1
1
IC300
1
ON/*OFF
VIN
2
VSS
3
VOUT
EXT
DCDC_IC
RX TX
11mVp-p 800mVp-p
NC
100k
C172
2
1
1
3
Q161
Q171
C163 R162
K4700P(50V)
C174 C167 R167 R164
39k
NC K0.22 1k 47
R185 33k
TX
82mVp-p
5
4
R365 1k
2
R364 10k
3
R362
47k
3
1
Q362
2
Q143
NC
Q141
C141
R141
Q156
NC
2
1
3
2
1
3
Q142
R121 390k
R122 390k
KX-TG5771 SCHEMATIC DIAGRAM (Base Unit_Main)
87
CHARGE PAD
CHARGE+
Q361
R361 L361
1
6.8u
3.3k D301 NC
CHARGE-
L371 2 1
NC
R342 47k
3
1
2
Q340
NC
100k
C101
680p(3216)
L101 33u
3 2
4 1
D101 L102 33u
C102 680p(3216)
C121 K680P(50V)
C122 K680P(50V)
Q111
3
1
2
KX-TG5771BXS/KX-TGA570BXS
REFERENCE
1XX : TEL LINE
3XX : POWER, CHARGE
4XX : RESET, MIC, SP
5XX : DSP, RF I/F
6XX : FLASH, KEY, LCD
7XX : RF(2.4G)
8XX : RF(5.8G)
6~10V
DCP2
DCP
1
2
CN301
DCM
DCM2
L1T
CN101
1
2
TEL JACK
P101 22
L1R
TEST SIGNAL
FREQUENCY
1kHz
RX
(MIC Mute: ON)
-25dBm/600Ω
IN 100mVp-p
TX
-10dBm/600Ω
OUT
700mVp-p
NC: No Components