Panasonic KX-TG6811CA / KX-TG6811RU / KX-TG6811UA / KX-TG6812CA / KX-TG6812RU / KX-TG6812UA / KX-G6821CA / KX-TG6821RU / KX-TG6821UA / KX-TG6822CA / KX-TG6822RU / KX-TG6881RU / KX-TG6891RU / KX-TGA681RU Service Manual / Supplement ▷ View online
5
KX-TGA681RU SCHEMATIC DIAGRAM (Handset_Main)
NC: No Components
2/2
RX AF (Handset)
TX AF
SP-Phone RX / Beep
RX RF
TX RF
SHORT
SHORT
SHORT
SHORT
SHORT
SHORT
CHARGE_DET
CHARGE_CTRL
STB_A
SOCn
SOCp
CARBON_CL1
C73
D10p
C72
D10p
GND
GND
+1.8V
C30
K1u
GNDA
GND
GND
GND
R23
1k
GND
C99
NC
C98
NC
GND GND
1.8V
MIC
AP1
Q1
D13
NC
D14
NC
C36
J39p
C78
K2200p
GND
C79
K2200p
GND
R77
1
R76
1
C22
K1u
C190
K0.1u
HAK_CL1
GND
GND
GND
GND
D21
NC
D22
NC
*C32
K0.1u
*R18
30k
R19
10k
CHG+
CP3V
GND
GND
C53
K2.2u
C55
D10p
D3
CP4V
GND
CP2.8V
GND
C41
K0.1u
IC4
VJ1
1
*CS
2 DO/IO1
6
CLK
7
*HOLD/IO3
3
*WP/IO2
8
VCC
4
GND
5
DI/IO0
CP3V
R41
33k
OFF
SP-PHONE_SPEAKER
+
-
RECEIVER
+
-
C191
K1u
C51
K1u
C59
K1u
C52
K1u
C29
K1u
R1
10k
C12
K2.2u
GND
25
P3_3/ADC0
26
P1_0/INT0/ADC1
27
SOCp
28
SOCn
29
DC_SENSE
30
DC_I
31
DC_CTRL
32
VBAT
33
CHARGE_CTRL
23
VDD/AVD
24
LDO_CTRL
34
P1_7/CHARGE
35
P3_1/DP1/PAOUTp
36
VDDPA
45
CP_VOUT2
46
P1_6/PON
37
P3_0/DP0/PAOUTn
21
LSRp
22
LSRn
38
CP_VBAT1
39
CP_C1x
40
CP_C2x
41
CP_C1y
42
CP_VBAT2
43
CP_C2y
44
CP_VOUT1
VBAT
VBAT
RA7 820
1
2
3
4
4
C801
10p
GND
RF_TXn
GND
RF_TXp
RF_RXp
C859
10p
ANT-Short-GND
VBAT
ANT-Short
ANT1_TP
GND
GND
RF_RXn
GND
OJ1
OJ2
OJ3
OJ5
OJ7
OJ6
CP3V
CP2.8V
CP4V
POWER
ZA1
1
2
6
7
9
11
3
4
8
10
5
2
1
C860 2.2p
C861 2.2p
CHG_MON
C70
68p
C71
68p
C862 1.5p
Test Pattarn for Carbon
MICn
(MAX500mA)
Test Pattarn for Pattern
RECEIVER+
RECEIVER-
MIC_POWER
MICp
open-stub
SL
W=0.6mm
L=20.0mm
open-stub
SL
W=2.2mm
L=5.0mm
open-stub
SL
W=2.0mm
L=10.8mm
TX-balun
SL
W=0.3mm
L=39.0mm
RF BLOCK
open-stub
SL
W=2.9mm
L=2.8mm
SL
W=0.3mm
L=6.5mm
open-stub
SL
W1=0.2mm
L1=3.0mm
W2=0.7mm
L2=4.3mm
SL
W=0.2mm
L=20.0mm
LPF
SL
W=0.3mm
L=6.95mm
MSL
W=0.25mm
L=5mm
MSL
W=0.25mm
L=5mm
MSL
W=0.25mm
L=2mm
50 ohm line
L=2mm
50 ohm line
Total L=4mm
(1)
(2)
(3)
(4)
(5)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(13)
(14)
(15)
(16)
6
Memo
7
3.2.
Printed Circuit Board
3.2.1.
Handset (Main)
3.2.1.1.
Component View
KX-TGA681 CIRCUIT BOARD (Handset_Main (Component View))
R48
ANT- Short
ANT- Short- GND
C91
LCD_OTP
RECEIVER
C38
C81
D21
C70
C71
D22
D14
D13
C73
C72
SP-PHONE_SPEAKER
C92
LCD_SID
LCD_CD
LCD_SCL
%LCD_RESET%
%LCD_CS%
C93
C801
ANT1_TP
JTAG
IC1
IC3
C69
CP2.8V
RA5
R60
C44
R61
C45
C46
C860
C861
C859
C862
R20
C47
C47
C43
C12
R23
RA7
C13
C11
C22 C36
C191
C190
C98 C99
C59
C29
C30
D3
C51
C53
C52
C55
C56
C40
STM
X1
IC4
CP4V
CP3V
CKM
STB_E
KIN_4
KIN_2
SFK_LED
KIN_3
CHG_MON
1.8V
R41
C41
R77
C78
R15
R76
C79
R1
Q1
RA2
Q6 RA3
KEY_LED
C1
C32
R19
R18
C866
C85
KIN_1
STB_D
POWER
STB_B
STB_C
Q10
R10
Q12
R11
Q11
R12
R13
Q9
Q4
CHG_CTRL
STB_A
Q2
C19
R2
R9
R8
Q3
C6
F1
BATT+
R6
R45
C15
UTX
GND
URX
VBAT
BATT-
R7
C5
R3
CHG
CHG
PbF
PNLB2160Z
GREEN
ORANGE
BLUE
ORANGE
B
C94
+
–
+
–
+
–
8
3.2.1.2.
Bottom View
KX-TGA681 CIRCUIT BOARD (Handset_Main (Component View))
FIDA
LED20
LCD
RST
SOFT_A
UP
SOFT_C
LEFT
RIGHT
TALK
DOWN
OFF
LED3
LED5
1
2
3
4
5
6
7
8
9
AST
0
SHARP
SP
ECO/ R
LED4
LED6
LED12
MIC
SFK1
SFK2
LED2
LED1
PbF
PNLB2160Z
B
Display
