Panasonic KX-TG8521UAB / KX-TGA850RUB (serv.man2) Service Manual ▷ View online
73
KX-TG8521UAB/KX-TGA850RUB
HEADSET_DET
RECEIVER
+
-
C71
10p
C113
D10p
D10p
C97
D10p
C96
D10p
D3
NC
D4
NC
C74
NC
GND GND
C12
K10u
D21
D22
GND
GND
R309
NC
R310
NC
C152
K1000p
GND
ANT_TP
GND
R73 33
R74 33
RXON
RXp
TXON
TXp
TXn
RXn
C70
10p
C6
NC
DA801
1
2
3
MIC AP1
1
2
SP-PHONE_SPEAKER
+
-
C185
K1000p
L73
( )
C83
D10p
L72
C127
K1000p
C82
K470p
C110
K1000p
L71
( )
R308
C108
NC
CN4
Headset Jack
1
4
2
3
3
5
R306 100
L74
10
R22
3.3k
R25
2.2k
L9
C8
D10P
C9
12p
R1
NC
GND
GND
GNDA
GNDA
GNDA
GNDA
GNDA1 GNDA1 GNDA1
GNDA1
GNDA
GNDA
GNDA
GNDA
R27
2.2k
R24
390
R10
NC
R11
0
GNDA
D14
D13
GNDA
GNDA
GNDA
R807
470
R806
470
R32
100k
GND
VBAT
SPP
SPM
MIC+
MIC-
R34
390
GNDA
R28
2.2k
GND
GND
GND
GND
GND
C75
NC
GND
GND
GND
GND
GND
C820
1.8p
C863
1.8p
GND
GND
GND
GND
C859
2p
C895
1.3p
GND
GND
GND GND
GND
GND
GND
C814
NC
ZA1
C98
( )
C99
( )
GND
GND
C896
1.8p
C805
2.4p
C806
2.4p
C810
2.5p
C813
1.6p
C812
8.2n
L809
1p
C811
100p
C822
10p
C826
10p
C825
10p
C897
24p
C37
10u
C86
22uF
X1
13.824M
L13
180n
L14
NC
GND
C898
0.7p
L3
C14
0.039u
C72
10p
C73
10p
MIC POWER
RECEIVER+
RECEIVER-
HEADSET_DET
Headset_MIC+
Speakerphone_SP+
Speakerphone_SP-
MIC+
MIC-
Headset_RECEIVER
KX-TGA850 SCHEMATIC DIAGRAM (Handset_Main)
NC: No Components
(1)
(2)
(3)
(4)
(6)
(5)
(8)
(9)
(10)
(11)
(12)
(7)
RX_RF
TX_RF
TX _AF
Handset RX
Handset TX
RX_AF
(Handset)
(Handset)
Sp-phone RX/Beep
74
KX-TG8521UAB/KX-TGA850RUB
13.5. Schematic Diagram (Charger Unit)
J1
2
1
TP3
G
TP2
TP1
TP4
R1
12 (2W)
NC
A
K
F1
SCHEMATIC DIAGRAM (Charger Unit)
75
KX-TG8521UAB/KX-TGA850RUB
14 Printed Circuit Board
14.1. Circuit Board (Base Unit_Main)
14.1.1. Component View
C32
C37
C88
C30
C25
C517
C518
C512
C70
C861
C511
C514
C515
C513
C516
C49
C48
C86
C36
C157
C520
C519
C521
C522
C827
C850
C803
C812
C811
C825
C822
C823
C806
C808
C805
C810
C810
C854
C860
C27
C17
C16
C15
C28
C42
C3
C8
C2
C43
C4
C622
C1
R802
R91
R92
R95
R804
R801
R808
R132
R133
R135
R657
R516
R126
R130
R129
R56
R803
R805
R28
R27
R27
R21
R22
R9
R10
R30
R124
R123
R511
R42
R14
L3
L801
L803
L1
IC801
SA1
D5
D6
D9
DA801
D22
D3
Q22
Q24
Q3
CN5-1
CN5
CN5-2
CN5-3
CN5-4
CN5-5
CN5-6
CN5-7
CN5-8
CN5-9
CN5-10
C156
C501
STM
C29
C163
C51
C834
C87
C802
C804
C819
C809
C859
C851
C853
C166
C10
C9
C12
C6
C5
C7
X1
ANT_1
F1
ANT_2
R15
R31
R17
R16
R55
R43
R6
R109
R106
C306
C813
R5
R3
R8
R7
R4
R807
R93
R806
L802
L2
IC401
IC3
IC2
RA501
RA402
SW1
DA802
Q23
Q25
Q4
KX-TG8521/8522/8523/8524 CIRCUIT BOARD (Base Unit_Main (Component View))
E
E
E
E
5
F1 3.0A
8
1
4
1
1
B
ZB
76
KX-TG8521UAB/KX-TGA850RUB
14.1.2. Bottom View
KX-TG8521/8522/8523/8524 CIRCUIT BOARD (Base Unit_Main (Bottom View))
PNLB1732Z
PbF
B
C23
C24
C57
C141
C305
C614
C61
C168
C820
C826
C65
C814
C90
C72
C422
C625
C631
C617
C421
C84
C55
C53C137
C423
C54
R615
R2
R57
R117
R29
TP9
R12
R77
R78
DC_IN
R36
R34
R37
R33
R81
IC7
D10
Q9
Q421
DCP
SPp
SPm
DCM
C624
C637
C19
C22
C56
C14
C18
C155
CL2
C857
C855
C167
C623
C626
C856
C858
C837
C169
C170
C136
C171
C52
CL1
C146
C150
C149
C145
C615
C75
C74
CKM
C616
C630
C60
ANT2_TP
ANT1_TP
R24
R23
R20
R19
R18
R116
R87
R86
R429
R425
R424
R430
R426
R76
R40
R13
R35
R32
R75
R428
R427
LINE_DC
CHG
ORG
BLUE
BLUE
ORG
RED
ORG
BLUE
ORG
BLK
BLUE
BROWN
YLW
ZB
CHG
SP
DC
L2R
L1R
L1T
L2T
IC421
TP10
TP15
TP15-sub
TP16
TP16-sub
RA80
JTAG
RA1
D21
D27
D15
D16
D26
D24
D23
Q5
Q2
Q8
Q10
E
E
14
GND_C
GND2
UTX2
URX2
GND
J101
VDD5
VDD3
VDD1
VDD2
VDD4
URX
UTX
VDD1
1.8V
CLK
(10.368MHZ)
VDD4
(CP3.0V)
VDD3
(3V)
CP2.5V
VDD2
(2.5V)
GND
URX
JIG
UTX
}
L2T
L1T
L1R
L2R
SP+
SP-
DC+
DC-
CHG-
CHG+
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