Panasonic KX-TG6441T Service Manual page 85

(1)
(2)
3.3V
(3)
5
6
7
8
(4)
(5)
(6)
RX
120mVp-p
C178
(7)
0.022u
E
B
Q171
C
(8)
R154 1k
(9)
(10)
(11)
(12)
R134 1k
(13)
(14)
(15)
(16)
(17)
IC331
D341
K A
VOUT VIN
4
NC
NC2 VDET
3
GND *RESET
2
CD NC1
1
TX
800mVp-p
C
B
Q161
E
C165 NC
C173
R164 R161
K0.22u 2.7k 100k
R181 390 R182 56 C184
K1.0u
KX-TG6441/6442/6443/6444/6445 SCHEMATIC DIAGRAM (Base Unit_Main)
KX-TG6441T/KX-TG6442T/KX-TG6443T/KX-TG6444T/KX-TG6445T/KX-TGA641T
Charging detection
R365
Q362
1k C
E
RF_GND DIGITAL_GND
Q141
NC
Q156
C
B Q142
C
B
E
E
85
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
D301
R375 0
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
DCP
3.0A
DCM
DCM2
GAP
L1T
L1R
P101 22