Schematic Diagram (Handset) - Panasonic KX-TG8421FXB Service Manual

KX-TG8421FXB/KX-TG8421FXN/KX-TGA840FXB/KX-TGA840FXN

13.4. Schematic Diagram (Handset)

Charge Current
F1
BATT+
5.6n
To Battery
C150
L8
BATT- ( )
R45
C35
0.1
GND
L4
CHG(+)
( )
C5
K0.1u
To Charge
R30
D8 C147
27k
Terminal
L5
CHG(-) ( )
GND
GND GND_0
GND
+1.8V
R64
R65
RA61 10k
2 3
UTX
URX
1 4
220
GND
R63
GND
JTAG
100
COL0
COL1
COL2
COL3
COL4
COL5
BATTERY
BELL LED
(Amber)
LED12
GND
C139
GND
NC: No Components
BAT BATTERY
C1 CP1
6.3V
C3 C4
330u
GND GND GND
C15
R7 R2
1.2k
3.9k
D7
Q4
R6
R4
R31
1k
Q9
C121
GND GND
R66
1k
UTX
TO RF BLOCK
URX
ANT2
PON
PSEL
JTAG
VDD_PADRV
TXp
TXn
TXON
RF_RXp
RF_RXn
RXON
ANT1
SW1
8
1 4
2 5
3 6
7
GND_0
CP+4.0V
KEY BACKLIT
(Blue) LED1
C138
R300
270
R301 R302 R303
270 270 270
Q7
GND
+1.8V
C44
K0.1u
61
R225
62
LCD_CSB 0
63
64
65
TEST
LCD_RESET
66
67
BELL_LED
68
69
C36 C45
K0.1u
70
D10p
71
C46
GND
72
73
74
75
TX _RF
76
77
78
79
80
BATTERY
To PA
81
C182
GND
RX _RF
GND
250mVp-p
0.75V
0V
CP+4.0V
R71
C29
82
D10p
W_LED+
LCD BACKLIT
GND
WHITE LED
ON LCD UNIT
R305
270
W_LED-
R304
270
GND
86
BATTERY
R330
1M
Q11
Q12
C331
K1u
R331
27k
C332
GND
K1u
R332
27k
GND
GND GND
X_CLK
R20 2.5V 4.0V
10
CP+2.5V
GND
C40
k0.1u
GND
RSTn
JTAG
P2_5/PCM_FSC/SF
P2_4/SCL1/PCM_DO/DP3
P2_3/SDA1/PCM_DI/DP2
*IC1
P2_2/PCM_CLK/CLK100
P2_1/ECZ2/PWM1/LED4
P2_0/ECZ1/PWM0/LED3
VDD2
LDORF_CTRL
GND
RF_SUPPLY2
RFP0n
RFP4
RFP3
VDD_PADR
VSS_PADR1
RF_TXp RINGOUT/RINGING/P3_5
RF_TXn
VSS_PADR2
RFP2
C41
( )
3 1
2
R215
X1
C13
GND
0
10.368M
K0.1u
CP+2.5V
R50
3.3k
C101 C100
K1u K1u
16V 25V
White
C27
K1u
GND
To Color LCD Unit
Q2
D1
(1)
GND
C2 CP2
6.3V
330u
CP+4.0V
CP2.5V
CP4.0V
C53
K10u
(2)
C52
C51
K10u
K1u
(3)
C54
C55
D10p
D10p (4)
C38
( )
GND
1 2
S1
GND
R12
0
C49
K1u
40
VBAT2
39
CP_C1y
C50
38
CP_C2x
K1u
37
CP_C1x
36
VBAT1
(5)
35
PAOUTn/P3_0
(6)
34
VDDPA
33
PAOUTp/P3_1 (7)
CHARGE
32
P1_7/CHARGE
CHARGE_CTRL
31
CHARGE_CTRL
SOCn
30
SOCn
SOCp
29
SOCp
(8)
28
NTC/ADC2
27
ADC1/INT0/P1_0
COL0
26
ADC0/P3_3
COL1
25
PARADET/P3_4
COL2
24
COL3
23
RINGn/P3_6
COL4
22
RINGp/P3_7
21
CIDINp/VREFp
RA2
1k
VREFm
C12
K10u
R22 C14
3.3k K0.01u
(9)
C17
( ) C7 D10p
D10p VREFm
C18
(10)
C97
RA4
D10p
C96
3.3k
D10p
(11)
(12)
C11
K0.1u
R27 820
R28 820
(13)
(14)
R54
10k R53 R51 R52
3.3k 470 220
R55
1k
C102
K1u
16V