Panasonic KX-TG8021UAC / KX-TG8021UAS / KX-TG8021UAT / KX-TGA800RUC / KX-TGA800RUS / KX-TGA800RUT Service Manual ▷ View online
85
KX-TG8021UA/KX-TGA800RU
RX_RF
TX_RF
TX _AF
RX-AF
(Handset)
Beep
Sp-phone RX
Sp-phone RX
MIC-
MIC+
RECEIVER
+
-
C113
NC
10k
R40
10k
R41
BATTERY
GND
GND
GND GND
R206
NC
R207
NC
10k
R42
C75
NC
C74
NC
VREFm
VREFm
GND
GND
CP+2.5V
GND
ANT_TP
VREFm
D4
VREFm
D3
100p
C186
100p
C187
GND
GND
4.7n
L803
1.6p
C810
100p
C822
2.4p
C802
0.75p
C820
47
R805
GND
GND
1.6p
C813
GND
IC801
1
PSET
2
VCCS
3
PI
4
PIX
7
PSEL
8
POX
9
PO
10
VCC
11
GND
5
PRAMP
6
PAON
GND
GND
220
R806
7p
C832
BATTERY
1k
R804
GND
7p
C833
GND
GND
GND
GND
4.7n
L804
3.3n
C814
1p
C834
GND
GND
D802
220
R807
10p
C809
D801
10p
C811
4.7n
L802
GND
10p
C819
2.4p
C804
100n
C808
1.3p
C803
1k
R803
GND
GND
SP-PHONE_SPEAKER
+
-
10p
C72
10p
C73
10p
C117
7p
C812
10p
C825
D13
D14
220
R108
220
R107
MIC
PB1
1
2
DA1
1
2
3
D22
D21
GND_1
GND_1
C70
NC
NC
( )
C71
NC
( )
GND_1
GND_1
C140
NC
( )
0.1u
C172
IC3
64k
1
A0
2
A1
3
A2
4
GND
5
SDA
6
SCL
7
WP
8
VCC
1u
C188
L14
L15
GNDGND
R320
R321
10p
C827
22n
L801
470
R801
GND
B1.5p
C826
B0.5p
C837
3p
C124
CARBON_CL1
C-TP2
C-TP1
NC
R309
NC
R310
GND
GND
VREFm
VREFm
270
R802
RXON
RF_RXn
RF_RXp
TXON
VDD_PADRV
TXn
TXp
PSEL
PON
PON
ANT1
ANT2
ANT2
LSRp
LSRn
MICp
MICn
ANT2
(1)
(2)
(3)
(4)
(3)
(4)
(5)
(7)
(6)
(9)
(10)
(11)
(8)
KX-TGA800 SCHEMATIC DIAGRAM (Handset_Main)
NC: No Components
86
KX-TG8021UA/KX-TGA800RU
13.5. Schematic Diagram (Charger Unit)
J1
2
1
TP3
G
TP2
TP1
TP4
R1 10
D1
A
K
F1
SCHEMATIC DIAGRAM (Charger Unit)
87
KX-TG8021UA/KX-TGA800RU
14 Printed Circuit Board
14.1. Circuit Board (Base Unit_MAIN)
14.1.1. Component View
PQ
UP11538Z
B
PbF
1
4
8
5
C55
C54
C614
SW1
C14
C144
C502
C505
C29
F1
3.0A
ANT_2
C504
C36
C157
C622
C503
C619
C618
C27
C1
C2
C7
C118
C125
C18
C56
C155
CN5
R116
R36
R516
R132
R801
JT
A
A
G
IC401
R78
R77
R657
R106
R109
R130
R57
R129
R511
R56
R24
R18
R20
R19
R55
R23
R14
R29
TP9
TP10
RA501
D22
D3
D12
Q24
Q5
E
E
E
Q3
Q4
C166
C12
C57
C22
C23
C24
C306
C9
C10
C148
C147
C501
C51
C30
D1
C31
C32
C163
C37
C141
X1
C25
R15
R28
R27
R27
R532
R38 R39
R631
R542
R654
R653
R17
R16
R16
IC1
RA402
D9
D6
D5
Q23
Q8
R8
L1
ANT_1
L2
SA1
R7
D15
KX-TG8021 CIRCUIT BOARD (Base Unit (Component View))
88
KX-TG8021UA/KX-TGA800RU
14.1.2. Bottom View
C430
CLK
GND_C
C137
C832
C621
C620
C4
C117
C123
DA
1
C804
C124
C811
C807
C813
C808
C822
R804
R75
C53
C61
C74
C814
1
E
C75
C72
C837
C827
C802
C834
C168
C52
C422
C625
C617
C60
C49
R12
R124
LINE_DC
R123
R13
R30
R31
R430
R83
R426
VDD4
VDD2
VDD5
VDD3
URX
GND
CL2
J101
Q9
UTX
DCP
DCM
VDD1
R429
1
4
8
5
R32
R615
R5
R6
R2
R805
R802
R135
ANT2_TP
R803
R807
1
20
60
41
21
40
80
61
R33
R117
R428
R427
L801
L802
TP16
TP15
CHARGE+
CHARGE-
L1R
YELLO
W
L1T
GREEN
L2T
WHITE
CL1
ANT1_TP
L2R
RED
D16
Q2
Q421
Q22
SPm
SPp
C8
C146
C423
C156
C48
C149
C145
C421
C624
C84
C136
C623
C626
C15
C16
C17
C167
R100
C28
C6
C5
C3
C121
C119
C160
C158
C833
C820
C820
C826
C825
C801
C159
C809
C819C810
C812
C803
C122
C161
C65
C305
C615
C616
R86
R76
R424
R81
R621
R82
R652
R651
R650
R651
R650
R806
R34
R656
R35
R79
R80
R22
R21
R9
R10
R3
R4
R87
R126
R425
L804
L803
L5
L7
L4
IC7
IC801
IC421
D23
D26
D21
D802
D801
KX-TG8021 CIRCUIT BOARD (Base Unit (Bottom View))
PQ
UP11538Z
KX-TG7321/7301/8321
8301/8021/8011
KX-TG73 /80
ONL
Y
PbF
B
GND
GND
VDD3 (3.0
V)
URX
VDD2
LINE_DC
(2.4 V)
VDD1 (1.8
V)
VDD4 (3.0
V)
VDD5 (2.5
V)
CLK
(10.368 MHz)
ANT2_TP
DC_IN
RESET (IC1: pin 61)
UTX
L1R
L1T
L2T
ANT1_TP
L2R
CHARGE+
CHARGE-
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