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Schematic Diagram (Handset_Main) - Panasonic KX-TG4031CB Service Manual

Expandable digital cordless answering system
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KX-TG4031CB/KX-TG4032CB/KX-TG4033CB/KX-TG4034CB/KX-TGA401CB
7.4.

Schematic Diagram (Handset_Main)

Charge Current
F1
BATT+
2.5A
GND
BATT-
To Battery
GND
CHG(+)
L4
CHG+
NC
To Charge
Terminal
GND
L5
CHG-
NC
CHG(-)
GND
GND
GND
GND
GND
3.0V
GND
TDI
TMS
TCK
TDO
GND_J
GND
UTX
URX
GND
GND
(When LCD backlit on)
UP
SOFT1
TALK
DOWN
*
7
MENU
0
8
LEFT
SHARP
9
RIGHT
SOFT2
SP
4.0V
3.0V
BELL LED
(Amber)
GND
Q5
GND
GND
GND
NC: No Components
When on Charge
GND
GND
1s
R2
NC
Q4
Q9
GND
GND
R7
100k
VBAT
Q20
GND
GND
NC
GND
3.0V
4.0V
4.0V
GND
1
VOUT
2
GND
3
SHD
4.0V
OFF
KIN_5
4
1
KIN_4
5
2
KIN_3
6
3
TE
KIN_2
FLASH
KIN_1
4.0V
LCD_BACKLIGHT
(Amber)
LCD_BACKLIGHT
(White)
+
WLED
-
GND
GND
Q8
NC
R71
NC
GND
GND
GND
GND
VBAT
VBAT
C80
NC
GND
CHG_CUR
R44
NC
Q40
NC
EEP_WP
EEP_SCL
R43 0
EEP_SDA
EEP_SCL
CHG_CTRL
CHG_CTRL
CHG_DET
CHG_DET
* Start Monitor
* When "SFR" command
IC2
is executed, 13.824MHz
4.0V
NC
frequency will be output.
2
VIN
3
VSS
1
VOUT
4
GND
NC
EEP_SCL
UTX
EEP_SDA
URX
EEP_WP
HEADSET_DET
VBAT
LCD_VDD
LCD_RESET
*IC4
LCD_SID
6
LCD_SCL
CP
C40
5
LCD_CS
VCC
k0.1u
GND
LCD_CD
KIN_1
4
CN
KIN_2
4.0V
KIN_3
KIN_4
KIN_5
CP_OFF
STB_A
C41
k0.1u
STB_B
URX
GND
UTX
STB_C
STB_D
STB_E
CP_OFF
BELL_LED
KEY_LED
FLASH:1.8V / ROM:1.2V
4.0V
3.0V
KEY BACKLIGHT
(Amber)
LITE-ON
*RA1
*RA2
*RA3
NC
330
330
Q6
GND
14
VBAT
3.0V
3.0V
C172
0.1u
RA5
8
1
VCC
NC1
10k
E_WP
7
2
*WC
NC2
E_SCL
6
3
16K
SCL
NC3
E_SDA
5
4
SDA
VSS
IC3
GND
TXON
TXn
TXp
TO RF BLOCK
RXp
RXn
RXON
VDDC
VBAT
3.0V
C43
C46 10p
K0.1u
C45
K0.1u
RSTN
67
GPIO[0]/SCL_IIC
68
GPIO[1]/SDA_IIC
69
GPIO[2]
70
GPIO[3]
71
GPIO[4]
72
GPIO[5]
73
GPIO[6]
74
GPIO[7]
75
GPIO[8]
76
VDDIO1
*IC1
77
GPIO[9]
78
GPIO[10]
79
GPIO[11]
80
GPIO[12]
81
GPIO[13]
82
GPIO[14]
83
GPIO[15]
84
GPIO[16]
GND
85
GPIO[17]
86
VDDIO2
87
GPIO[18]
88
GPIO[19]
89
GND
VBG
R23
10
GND
3.0V
3.0V
VDDC
VDDC
GND
GND
GND
1.2V
3.0V
3.0V
R501
NC
To 1.8inc FullDot
GND
44
TXn
43
TRSW_n
42
ANT
(1)
41
VCC_FE
40
(2)
VDD_IF
39
(3)
VCC_IF
38
(4)
VDD_APU
37
(5)
VBAT_APU
36
(6)
XIN
(7)
35
XOUT
(8)
34
DCINS
33
PWM0
32
(9)
PWM1
31
(10)
SPOUTP
30
(11)
VCCPA
29
(12)
SPOUTN
(13)
28
LOUT
(14)
27
HSSPOUTP
26
(15)
MPWR
25
(16)
HSMIP
24
(17)
HSMIN
23
MIP
VREF
GNDA
C7
GNDA
NC
VBAT
GND
(18)
(19)
GND
(20)
R504
NC
C504
GND
K1.0
16V

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