Read Panasonic KX-TG8521UAB / KX-TGA850RUB (serv.man2) Service Manual online
69
KX-TG8521UAB/KX-TGA850RUB
EEP_WP
Lo
w_Rad
LED2
LED1
EEP_WP
CHARGE
eco_mode
SCL2
SD
A2
GND
GND
Q8
C614
1
u
GND
+1.8V
GND
GND
GND
GND
R615
56k F
GND
GND
GND
SA1
L1
33u
L2
33u
GND
J101
GND
GND
+6.5V
GND
GND
GND
R16
10k
GND
GND
GND
GND
R14
100k
GND GND
GND
*C16
K2.2
u
R18
27k
GND
C17
NC
GND
R27
100k
C15
NC
GND
TP10
R116
0
R19
8.2k
R23
100k
+1.8V
GND
GND
GND
GND
GND
C24
NC
C57
NC
GND
GND
R21
12
GND
TP9
C2
3
NC
R28
470k
C56
K0.1
u
C141
NC
GND
GND
C22
1u
C155
NC (1005)
R33 1k
R
3
5
1k
GND
GND
C136
10p
GND
R10
100k
GND
+1.8V
GND
GND
R8
100k
C72
100n
C61 100n
GND
R81
3
.3
k
R117
3
.3
k
+1.8V
C157
1n
TP16
TP15
*C48
NC
*C156
GND
GND
GND
GND
GND
C51
100n
GND
GND
GND
C75
100n
Q4
*D2
3
NC
+3.0V
C84
2.2u
C306
NC
C305
1u
GND
GND
R130
1k
R129
10k
F1 3A
RA402 10k
1
2
2
3
4
*D5
NC
A
K
A
K
A
K
D6
NC
D9
NC
C615
1u
Q9
+2.4V
+2.4V
GND
R106 220
R109
220
R77
10k
NC
GND
C167
NC
VDD2
C7
100n
C8
100n
C65 10p
+2.5_CP
L2T
L1T
L1R
DCM
DCP
L2R
C1
3
7
10p
GND
C
3
2
100
u
16
C27
10
u
50
GND
X1
10.368M
1
3
2
R29
0
ANT1
RF_RXn
RXON
TXON
TXn
TXp
VDD_PADRV
PSEL
PON
ANT2
RF_RXp
GND
C
3
6
33
0
u
10
R657
10k
GND
GND
GND
GND
Q5
C9
680p
C10
680p
RA1
1k
1
2
3
45
6
7
8
C622
NC
*D22
LINE_DC
*R126
3.3k
HAK_CL1
STM
VDD1
C1
NC
C617
1
u
10
C29
NC
C
3
0
NC
C
3
7
NC
R4
1M
R6
1M
R3
180k
R5
180k
GND
*Q22
*R7
*R9
R22
27
C86
1
u
L3
22uH
GND
R91
47
DC_IN
C87
0.1
u
C88
0.01
u
R92
120
VDD3
*D24 NC
*Q23
Q10
D10
C90
NC
R95
680
R93
4.7k
1 ON/*OFF
2
VSS
4
EXT
5
VIN
3 VOUT
*C626
NC
*C6
3
7N
C
R37
3.9k
*C624
1
u
*C62
3
0.1
u
R40 270
C169
10p
C170
10p
*C147
10p
*C148 10p
C168
10p
C74
10p
C70
NC
C171
10p
R15
2.7k
*D26
NC
*R43
4.7M
*C54 33n
*C55
82n
*R36
120k
*C52 820p
*C5
3
820p
*R32 82k
*R
3
4
82k
*C3
680p
*C4
680p
*C5
10n
*C6
10n
*R42
4.7M
*D21
*C42
10n
*C43
10n
C18
NC
D3
4
1
3
2
*C28
0.0
33u
*C25
0.047
u
*D27
NC
*D15
NC
*D16
NC
AA
KK
*R2
NC
*C2
NC
*Q3
*C12
NC
*R17
2.2k
*C166
*R12
3
NC
*R20
2.7k
*C14
0.027
u
*C19
1200p
*R24
47k
1 A0
2 A1
3 A2
4 GND
2 A1
3 A2
4 GND
5
SDA
6
SCL
7
WP
8
VCC
1
VSS_LNA1
2
RF_RXp
21
CIDINp/VREFp
3
RF_RXn
4
VSS_LNA2
5
RFP1
6
RFP0
7
REF_RES
8
AVS_XTAL
22
RINGp/P
3
_7
2
3
RINGn/P
3
_6
24
RINGOUT/RINGING/P
3
_5
25
P
ARADET/P
3
_4
26
ADC0/P
3
_
3
27
ADC1/INT0/P1_0
28
NTC/ADC2
41
CP_C2y
42
CP_VOUT1/LED1
43
CP_VOUT2/LED2
44
PON/P1_6
45
VDD1
46
P2_7/BXTAL
81
GND
9
XTAL2
10
XTAL1
11
AVD_XTAL
12
RF_SUPPLY1
13
LDO_CTRL
14
AVD
15
LSRn
16
LSRp
17
VREFm
18
MICh
19
CIDOUT/MICn
20
CIDINn/MICp
29
SOCp
3
0
SOCn
3
1
CHARGE_CTRL
3
2
P1_7/CHARGE
33
P
A
OUTp/P
3
_1
3
4
VDDP
A
3
5
P
A
OUTn/P
3
_0
3
6
VBA
T1
3
7
CP_C1x
3
8
CP_C2x
3
9
CP_C1y
40
VBA
T2
47
P1_5/INT5/RDI/VDDE
48
P1_4/INT4/TDOD
49
P1_3/INT3/SIO
50
P1_2/INT2/SK
51
P1_1/INT1/LE
52
P2_6/WTF_IN
53
P0_7/SPI_DI
54
P0_6/SPI_DO
55
P0_5/SPI_CLK
56
P0_4/SPI_EN
57
P0_3/SCL2
58
P0_2/SDA2
59
P0_1/URX
60
P0_0/UTX
61
RSTn
62
JT
A
G
6
3
P2_5/PCM_FSC/SF
64
P2_4/SCL1/PCM_DO/DP
3
65
P2_
3
/SD
A1/PCM_DI/DP2
66
P2_2/PCM_CLK/CLK100
67
P2_1/ECZ2/PWM1/LED4
68
P2_0/ECZ1/PWM0/LED
3
69
VDD2
70
LDORF_CTRL
71
RF_SUPPL
Y
2
72
RFP0n
7
3
RFP4
76
VSS_P
ADR1
79
VSS_P
ADR2
77
RF_TXp
80
RFP2
75
VDD_P
ADR
78
RF_TXn
74
RFP
3
*Q2
*R124
10
*R12
10k
*R13 680k
*R30
470
*R
3
1
470
*R55
5.6
*R56
5.6
*R57
0
*C49
470p
DC_IN
Charge -
Charge +
TO RF BLOCK
TG85/55xx only
Charge -
Charge +
NC
NC
NC
NC
NC
NC
NC
1.8V
3.0V
TX _RF
RX _RF
TX _AF
Bell signal
Caller ID
0.75V
0V
250mVp-p
Loop Current
Charge
Current
Current
RX_AF
Bell signal
*IC401
IC2
IC3
*IC7
KX-TG8521UA SCHEMATIC DIAGRAM (Base Unit)
NC: No Components
(1)
(2)
(3)
(4)
(5)
(7)
(6)
(8)
(9)
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