Panasonic KX-TG2711B Service Manual page 13

+3.0V
R172 680k
560p
C175
Q171
C120
1000p
VCCA
(1)
VREF
22
MIN
21
VCCA
20
VREF
19
(2)
DCIN3/LIN1
18
DCIN2
17
DCIN1
16
DCIN0/LIN0
15
DOUBOUT
14
DOUBCAPP1
13
DOUBCAPP
C504
12
DOUBCAPN
11 C521
DOUBCAPN1
10
VBAT
9
COREOUT
8
VDDC2
7
GPIO[26]
6
GPIO[25]
5
GPIO[24]
4
(3)
GPIO[23]
3
GPIO[22]
2
GPIO[21]
1
GPIO[20]
VDDC
VDDC
(4)
(5)
C520
0.1u
(6)
0.1u
C611
IC611
64K EEPROM
1
A0 VCC
2
A1 WP
3
A2 SCL
4
GND SDA
R160
820
Q161
C
B
E
C163 NC
C173
R177 R164 R161
1k 2.7k 100k
0.1u
R151
100k
C184
1u
R121 390k C121 680p
R122 390k C122 680p
VDDC
HOOK
BELL
+3.0V
+3.0V
R501 10
VCCA
C505 10u
C506
1u
1u
1u
L501
100n
C502 C501
10u 0.1u
HOOK
BELL
KEYS_E
KEYS_D
KEYS_C
UTX
URX
+3.0V
R510
10k
+3.0V
RA611
3.3k
8
7
6
5
Q141
R141
100k
Q142
C
B
E
+3.0V
Q111
VBAT
NC
ZA1
PNMC1018ZA/S1
10 9 8 7
11
6
12
GND
1 2 3 4 5
GND
KX-TG2721 SCHEMATIC DIAGRAM (Base Unit (Main))
13
KX-TG2711/KX-TG2712/KX-TG2721/KX-TG2722/KX-TGA277
REFERENCE
1XX : TEL LINE
3XX : POWER, CHARGE
4XX : MIC, SP
5XX : BBIC
6XX : FLASH, EEPROM, KEY, LCD
7XX : FOR DK/BT
8XX : RF
C101 680p
D101
1 2
4 3
C102 680p
P101 22
C115
NC
1
R115
NC
2
+5.5V
+5.5V
F301
3.0A DCP
DCM
CHG+
CHARGE+
CHARGE-
+5.5V
IC302
2 3
OUT1 IN
4
OUT2
ADJ
1
PCB
HAK_CL1
PCB
RE1
NC: No Components
2/2
L1T
(YELLOW)
L1R
(GREEN)