13
KX-TG2711/KX-TG2712/KX-TG2721/KX-TG2722/KX-TGA277
KX-TG2721 SCHEMATIC DIAGRAM (Base Unit (Main))
NC: No Components
2/2
(1)
(2)
(4)
(
3
)
(5)
(6)
UTX
URX
BELL
HOOK
HOOK
BELL
KEYS_C
KEYS_D
KEYS_E
EEP_WP
EEP_SCL
EEP_SDA
C120
1000p
ZA1
PNMC1018ZA/S1
NC
1
2
6
7
9
11
3
4
5
8
10
12
R1
3
1
10M
L1R
C
3
51
1u
C1
33
NC
R1
33
33
0k
C611
0.1u
R501 10
VDDC
DCP
C521
1u
C111
0.047u
R141
100k
PCB
RE1
C142
K0.01u
C124
NC
C151
NC
L1T
DCM
C1
3
2
K
0.01u
VBAT
+
3
.0V
+
3
.0V
VCCA
Q141
B
E
C
+5.5V
+
3
.0V
+
3
.0V
R112
100k
C185
NC
R11
3
10k
C115
NC
+
3
.0V
F
3
01
3
.0A
CHARGE-
C186
10p
R142
2.7k
(
3
216)
C504
1u
C12
3
NC
R145
2.2k
R111
100k
P101
22
GND
L501
100n
C11
3
K0.68u
R121
3
90k
+5.5V
R122
3
90k
C112
0.047u
+5.5V
C501
0.1u
C520
0.1u
VDDC
HAK_CL1
CHG+
GND
R115
NC
R
3
22
100
R
3
21
140
IC302
3
IN
2
OUT1
1
ADJ
4
OUT2
D
3
61
NC
AK
C502
10u
C50
3
10u
C505 10u
D
3
62
1SR154
A
K
Q142
B
C
E
SA101
3
00V
SA102
N
C
2
1
SA10
3
NC
2
1
Q111
D11
3
AK
D1
33
AK
D15
3
NC
AK
R164
2.7k
R161
100k
C168
NC
R151
100k
C152
0.01u
R177
1k
Q171
Q161
B
C
E
C161
10u
R165
27k
R162
47k
C167
1000p
+
3
.0V
C164
NC
RA611
3
.
3
k
1
2
3
45
6
7
8
RA151
1k
1
2
3
4
C
3
42
0.1u
D14
3
NC
AK
C181
NC
C184
1u
C
3
21
1u
C506
1u
C16
3
NC
D101
1
4
3
2
R510
10k
IC611
64K EEPROM
1
A0
2
A1
6
SCL
7
WP
3
A2
8
VCC
4
GND
5
SDA
C
3
41
33
0u
6.
3
C101 680p
C102 680p
C121
680p
C122
680p
R16
33
9
R152
1
3
0k
R176
1k
R175
3
.9k
R172
680k
R
3
71
1
R
3
72
1
VREF
VCCA
VDDC
C176
1u
R114
47k
1
2
D142
25V
1
GPIO[20]
2
GPIO[21]
2
3
MIP
3
GPIO[22]
4
GPIO[2
3
]
5
GPIO[24]
6
GPIO[25]
7
GPIO[26]
8
VDDC2
24
HSMIN
25
HSMIP
26
MPWR
27
HSSPOUTP
28
LOUT
SPOUTN
GPIO[14]
8
3
GPIO[15]
84
GPIO[16]
85
GPIO[17]
86
VDDIO2
87
GPIO[18]
88
GPIO[19]
89
9
COREOUT
10
VBAT
11
DOUBCAPN1
12
DOUBCAPN
1
3
DOUBCAPP
14
DOUBCAPP1
15
DOUBOUT
16
DCIN0/LIN0
17
DCIN1
18
DCIN2
19
DCIN
3
/LIN1
20
VREF
21
VCCA
22
MIN
C17
3
0.1u
C171
0.022u
R168
4.7k
R160
820
R171
220
C178
0.0
33
u
C175
560p
REFERENCE
7XX : FOR DK/BT
3
XX : POWER, CHARGE
5XX : BBIC
6XX : FLASH, EEPROM, KEY, LCD
(YELLOW)
(GREEN)
4XX : MIC, SP
1XX : TEL LINE
8XX : RF
PCB