Read Panasonic KX-TG6451CAT / KX-TGA641RUT Service Manual online
71
KX-TG6451CAT/KX-TGA641RUT
Bell (Power fail)
Bell
SP_Phone Tx (to Tel line)
CLIP
CDL Rx (from Tel line)
CDL Tx (to Tel line)
SP_Phone Rx (from Tel line)
(Corded) Handset Rx (from Tel line)
(Corded) Handset Tx (to Tel line)
GND
1k
R531
1k
R532
Q351
1u
C351
GND
+1.8V
GND
GND
GND
56kF
R512
GND
GND
GND
*SA101
L101
L102
J101
GND
+6.5V
100u
C303
IC301
4
Fin
1
ADJ/GND
3
Input
2
Output
VDD3
GND
NC
C312
GND
NC
R111
NC
C116
D101
4
1
3
2
LINE_DC
27k
R131
C137
1
TP10
100
R154
4700p
C141
8.2k
R141
100k
R134
+1.8V
NC
C153
0.01u
C139
NC
C143
GND
12
R135
GND
TP9
K0.22u
C152
100n
C142
K0.22u
C154
C151
K1.0u
NC
C134
1k
R195
1k
R185
820p
C184
820p
C194
1M
R182
C193
NC
K1000p
C192
180k
R191
GND
1M
R192
GND
C183
NC
180k
R181
K1000p
C182
GND
82k
R172
100n
C352
GND
3.3k
R146
100n
C562
GND
GND
GND
100n
C522
ANT1
RXON
RXON
TXn
RF_RXn
RF_RXp
RF_RXp
RXON
RF_RXn
RF_RXp
RF_RXn
RF_RXp
TXON
TXON
TXn
TXn
TXp
TXp
VDD_PADRV
VDD_PADRV
PSEL
PSEL
PSEL
PON
PON
ANT2
ANT2
+3.75V_PD
D301
D112
Q131
100
R525
C513 NC
VDD1
1u
C512
3A
F301
1k
R526
D111
NC
C147
NC
10k
RA561
1
23
4
100n
C172
D137
1u
C504
GND
100
R311
GND
*IC501
4
VSS_LNA2
5
RFP1
6
RFP0
7
REF_RES
8
AVS_XTAL
9
XTAL2
10
XTAL1
11
AVD_XTAL
12
RF_SUPPLY1
13
VDD1
14
SPI2_EN/P4_0
15
SPI2_CLK/P4_1
16
SPI2_DO/P4_2
17
SPI2_DI/P4_3
18
P4_4
19
LDO_CTRL
20
AVD
21
LSRn
22
LSRp
29
RINGn/P3_6
30
RINGOUT/RINGING/P3_5
31
PARADET/P3_4
32
ADC0/P3_3
33
ADC1/INT0/P1_0
34
NTC/ADC2
35
SOCp
36
SOCn
37
CHARGE_CTRL
38
P1_7/CHARGE
39
DP1/PAOUTp/P3_1
40
VDDPA
41
DP0/PAOUTn/P3_0
42
VBAT1
43
P4_5
44
P4_6
45
P4_7
46
VBAT2
47
CP_C1x
54
PON/P1_6
55
VDD2
56
P2_7/BXTAL
57
P1_5/INT5/RDI/VDDE
58
P1_4/INT4/TDOD
59
P1_3/INT3/SIO
60
P1_2/INT2/SK
61
P1_1/INT1/LE
62
P2_6/WTF_IN
63
P0_7/SPI_DI
64
P0_6/SPI_DO
65
P0_5/SPI_CLK
66
P0_4/SPI_EN
67
P0_3/SCL2
68
P0_2/SDA2
69
P0_1/URX/PWM0
70
P0_0/UTX
71
P5_0
72
P5_1
79
P2_4/SCL1/PCM_DO/DP3
80
P2_3/SDA1/PCM_DI/DP2
81
P2_2/PCM_CLK/CLK100
82
P5_5
83
P5_6
84
P5_7
85
P2_1/ECZ2/PWM1/LED4
86
P2_0/ECZ1/PWM0/LED3
87
NC
88
VSS
89
VDD3
90
LDORF_CTRL
91
RF_SUPPLY2
92
RFP0n
93
RFP4
94
RFP3
95
VDD_PADR
96
VSS_PADR1
97
RF_TXn
1
VSS_LNA1
2
RF_RXp
3
RF_RXn
23
VREFm
24
MICh
25
CIDOUT/MICn
26
CIDINn/MICp
27
CIDINp/VREFp
28
RINGp/P3_7
48
CP_C2x
49
CP_C1y
50
VBAT3
51
CP_C2y
52
CP_VOUT1/LED1
53
CP_VOUT2/LED2
73
P5_2
74
P5_3
75
P5_4
76
RSTn
77
JTAG
78
P2_5/PCM_FSC/SF
98
RF_TXp
99
VSS_PADR2
100
RFP2
101
GND
3.3k
R133
10p
C511
10p
C521
LE
DP1
DP0
RDI
TDO
SIO
SK
EEP_WP
SCL2
SDA2
GND
1u
C501
C503
NC
+2.5V
10k
R527
C302
K1.0u
C301
K1.0u
VDD2
CP_VOUT2
GND
Q111
680p
C181
680p
C191
680p
C101
680p
C102
120
R153
*X511
NC
1
3
2
IC561
1
A0
2
A1
3
A2
4
GND
5
SDA
6
SCL
7
WP
8
VCC
JTAG
NC
C313
GND
10p
C514
10p
C185
10p
C195
10p
C344
GND
10p
C155
2.2
C136
100n
C502
GND
SA102
NC
GND
NC
*P101
18k
R165
56n
C166
18k
R166
1u
C164
BL1240K
IC101
1
LINE1
2
GND
3
Csw
4
Ra
5
OUT
6
NC
7
Cr
8
LINE2
PC101
NC
1
2
3
4
NC
C322
GND
NC
C323
+4.4V
330u
C138
Q341
18
R343
NC
D341
10k
R342
6.8k
R341
+3.2V
+3.5V_PD
D311
330u
C343
GND
D172
D162 NC
R161
NC
GND
3.3k
R167
R162
NC
Q161
NC
1.5k
R332
3.9k
R333
100n
C331
8.2k
R331
Q331
GND
+1.8V
4.7k
R334
+1.8V
10k
R114
47k
R113
D117
C361 1u
Q112
NC
Q113
NC
R118
*Q121
100k
*R121
10k
*R122
NC
SA103
0.033u
C187
GND
1k
R186
100n
C523
33k
R501
100k
R563
R344
NC
GND
D342
NC
+6.5V
Q162
100k
R169
GND
D161
4
1
3
2
1.2k
R168
NC
R170
+3.2V
5.6M
R178
*Q371
GND
HOOK_DET
HOOK2-6
HOOK2-4
NC
*R372
GND
NC
*R371
*R323
+3.5V_PD
+3.5V_PD
0
R196
4.7M
R197
4.7M
R198
10n
C196
10n
C197
10u
C371
GND
D352
+3.75V_PD
1k
RA501
1
23
4
10p
C146
10p
C186
Q115
R120
NC
0
R110
NC
R119
3.9k
R112
+3.5V_PD
*Q123
*Q122
*Q114
*Q168
C140
NC
100k
R123
PC102
1
2
3
4
R132
NC
R380
NC
R381
NC
R382
NC
Q380
NC
GND
GND
NC
R164
2.2k
R117
CP_VOUT1
R383
NC
IC304
4
Fin
1
ADJ/GND
3
Input
2
Output
GND
200
R385
NC
C387
NC
C386
100
R384
180
R312
D353
+3.2V_PD
+2.5V
*D173
D174
IC303
1
VIN
2
VSS
3
ON/OFF
5
VOUT
4
NC
R511
1m
L103
D138
4.3V
TIP
DCINP
DCINM
VDD5
VDD7
10p
C864
0
*R101
RING
330u
C311
330u
C385
NC
*R374
NC
*R142
NC
*R143
4.7u
C165
NC
*C118
0
*R125
NC
*R126
NC
R147
L501
0.033
*C145
560
*R144
0
*R145
82k
*R137
R148
0
270k
*R139
27k
*R140
27
*R136
390k
*R115
220k
*R116
*R163
1.8k
82n
*C188
100k
*R187
82k
*R184
82k
*R194
*IC302
NC
4
Fin
1
ADJ/GND
3
Input
2
Output
150
*R321
390
*R322
330
*C321
22u
*C144
PCM_FSC
PCM_CLK
PCM_DO
PCM_DI
KEY5
EEP_WP
TAM_WP
Pulse
SPI2_DI
SPI2_DO
SPI2_CLK
TAM_EN
LCD_CD_P
KEY6
ROW4
LCD_RESET_P
SCL2
SDA2
Pulse_mute
LCD_CS_P
POWER_FAIL
Line_Seisure
TAM_RESET
HOOK_DET
EEP_WP
Pulse
DC_IN
HOOKSW
(Not used)
L2T
L1T
L1T
L2R
L1R
RINGERP
RINGERM
DCP
DCM
KX-TG6451CA SCHEMATIC DIAGRAM (Base Unit_Main)
NC: No Components
NC
NC
NC
NC
0
(1)
(3)
(3)
(4)
(5)
(7)
(9)
(5)
(7)
(9)
(11)
(13)
(15)
(17)
(13)
(15)
(17)
(2)
(6)
(8)
(8)
(10)
(12)
(14)
(16)
(12)
(14)
(16)
(19)
(21)
(23)
(21)
(23)
(18)
(20)
(22)
(20)
(22)
(25)
(27)
(28)
(29)
(24)
(26)
(26)
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