Panasonic KX-TG6440PK Service Manual page 85

(1)
(2)
3.3V
(3)
VOUT
5
NC2
6
GND
7
CD
8
(4)
(5)
(6)
RX
120mVp-p
C178
(7)
0.022u
E
B
Q171
C K0.22u
(8)
R154 1k
(9)
10)
11)
12)
R134 1k
13)
14)
15)
16)
17)
IC331
D341
K A
VIN
4
NC
VDET
3
*RESET
2
NC1
1
TX
800mVp-p
C
B
Q161
E
C165 NC
C173
R164 R161
2.7k 100k
R181 390 R182 56 C184
K1.0u
Charging detection
R365
Q362
1k C
E
RF_GND DIGITAL_GND
Q141
NC
Q156
C
B Q142
C
B
E
E
KX-TG6440 SCHEMATIC DIAGRAM (Base Unit_Main)
85
KX-TG6440PK/KX-TGA641S/KX-TGA641T/KX-TGA740B
7.5 ~ 6.5V (+6.7V)
REFERENCE
R372 R371
1XX : TEL LINE
3XX : POWER, CHARGE
7.5 7.5
4XX : RESET, MIC, SP
R374
R373
5XX : DSP, RF I/F
6XX : FLASH, KEY, LCD
7.5 7.5
7XX : RF(2.4G)
8XX : RF(5.8G)
Q361
E
R361
B
3.3k
C
L362 CHARGE+
B
NC
R375 0 D301
R3630
CHARGE-
L372
NC
L371 NC
CHARGE PAD
CHG static GND
SP static GND
R141
100k
C101 680p
D101
L101 33u
3 2
4 1
C102 680p L102 33u
C116 NC
C121 680p
R121 390k C115 NC
R115NC
R122 390k
C122 680p
CID
Test Signal
Frequency: 1kHz
* RX
(MIC Mute: ON)
-25dBm/600Ω IN
100mVp-p
* TX
-10dBm/600Ω
700mVp-p
Q111
E
B
C
Bell detection
NC: No Components
DCP2
F301
3.0A DCP
DCM
DCM2
GAP
L1T
L1R
P101 22