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4
3 CHANGES
3.1.
SCHEMATIC DIAGRAM
3.1.1.
Handset (Main) P. C. Board
KX-TGA681 Only
Charge current
TX RF
RX RF
0V
800mVp-p
0.80V
SHORT
SFK_LED
LCD_RESET
STB_D
LCD_CS
STB_B STB_C
LCD_SCL
KIN_4
KIN_3
KIN_2
KIN_1
LCD_CD
KEY_LED
LCD_SID
BATTERY_ON
EEP_WP
BATTERY_ON
STB_F
KIN_4
KIN_3
CHARGE_CTRL
CHARGE_DET
STB_C
STB_D
KIN_1
SFK_LED
STB_B
STB_A
STB_F
SOCp
EEP_WP
LCD_LED0
STB_E
STB_E
KEY_LED
LCD_RESET
LCD_CD
LCD_SID
LCD_SCL
LCD_CS
LCD_LED0
SOCn
KIN_2
GND
R61
1k
R60
NC
C69
K0.1u
GND
+1.8V
RF_TXn
RF_TXp
RF_RXn
RF_RXp
C44
K0.1u
R20
F56k
GND
C43
D10p
C11
K0.1u
C13
K0.1u
GND
C15
J39p
VBAT
GND
GND
VBAT
+1.8V
C45
K0.1u
GND
C40
K0.1u
F1
GNDA
GND
GND
C6
K0.1u
R7
820
R9
30k
Q3
R2
30k
C19
K1000p
R6
10k
GND
C866
K0.1u
GND
C81
NC
GND
CP4V
C38
NC
*R13
1k
*R12
220k
*R11
680
*Q11
GND
GND
*Q10
*Q6
GND
*R15
1.5k
CP4V
LCD
12
GND
LCD
8
VDD
LCD
10
VSS
LCD
7
SI
LCD
2
OTP_PWR
*C92
K1u
LCD
9
VDDA
*C93
K1u
GND
LCD
1
GND
C91
16V K1u
LCD
11
V0
LCD
6
SCL
LCD
5
A0
LCD
4
RES
LCD
3
CS1
GND
CP3V
C5
K0.1u
CP2.8V
SOFT_C
RIGHT
1
SHARP
4
5
6
2
7
SP
P
U
3
8
AST
DOWN
LEFT
TALK
SOFT_A
0
9
ECO/R
C1
220u
GND
*R10
1.0
C47
1u
C56
K1u
CHG+
R3
NC
GND
X1
*LED12
B3ACB0000216
JTAG
Q9
DRC9143T0L
IC1
3
RFP1
4
RFP0
5
REF_RES
6
AVS_XTAL
7
XTAL2
8
XTAL1
9
AVD_XTAL
10
RF_SUPPLY1
11
P3_4/PARADET
47
QSPI_IO2
48
QSPI_IO1
49
QSPI_CS
50
VDDIO_QSPI
51
QSPI_IO3
52
QSPI_SCK
53
QSPI_IO0
54
VDD1
55
P2_7/BXTAL
76
P2_2/PCM_CLK/CLK100
77
WLED_CUR_0
78
WLED_CUR_1
79
P2_1/ECZ2/PWM1/LED4
80
P2_0/ECZ1/PWM0/LED3
81
LDORF_CTRL
82
VDD3
83
RFP0n
84
RF_SUPPLY2
1
RF_RXn
2
RF_RXp
12
P3_5/RINGOUT/RINGING
13
P3_6/RINGn
14
P3_7/RINGp
56
P1_5/INT5/RDI/VDDE
57
P1_4/INT4/TDOD
58
P1_3/INT3/SIO
74
P2_4/SCL1/PCM_DO/DP3
75
P2_3/SDA1/PCM_DI/DP2
85
RF_SUPPLY_PA
86
RF_TXn
87
RF_TXp
15
P3_2/CIDINp
59
P1_2/INT2/SK
88
RFP2
89
GND
16
VREFp
17
CIDINn/MICp
18
CIDOUT/MICn
19
MICh
20
VREFm
60
P1_1/INT1/LE
61
P2_6/WTF_IN
62
P0_7/SPI_DI/PWM1
63
P0_6/SPI_DO
64
P0_5/SPI_CLK
65
P0_4/SPI_EN
66
P0_3/SCL2/URX2
67
P0_2/SDA2/UTX2
68
P0_1/URX/PWM0
69
P0_0/UTX
70
VDD2
71
*RSTn
72
JTAG
73
P2_5/PCM_FSC/SF
RA5
3.3k
+1.8V
BATT+
BATT-
UTX
URX
URX
GND
VBAT
*Q12
Q2
Q4
IC3
16k
1
A0
2
A1
6
SCL
7
WP
3
A2
8
VCC
4
GND
5
SDA
CP3V
OJ4
R48
NC
CKM
R8
4.3
(3216)
SFK1
SFK2
STM
RST
LED20
R45
0.1
C85
J39p
GND
CHG+
CHG-
C46
1p
*RA2
680
*RA3
680
*LED6
*LED1
*LED2
*LED4
*LED5
*LED3
B3A
CB0000216
TO RF BLOCK
To Charge
Terminal
To Battery
(TGA681 = AMBER)
SFK LED
(EX = White)
(EX = AMBER)
KEY B/L LED
1.8inch Monochrome LCD
!! [Heat Seal]
LCD B/L LED
NC
C94
!
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