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26 SCHEMATIC DIAGRAM (Base Unit)
26.1. Base Unit
RX
TX
+5V
+5V
0V
0V
+12V
0V
+12V
0V
0V
+12V
+12V
+5V
13V to 5V
While charging
1Vp-p
8MHz
KX-TC1205RUB/W/S/F SCHEMATIC DIAGRAM (Base Unit)
ADAPTOR
120V AC
12VDC
200mA
CHG D
TX D
VCC
HOOK
OSCO
OSCI
CHG LD
DTMF1
DTMF2
DTMF3
DTMF4
PAGE
RXDATA
CLOCK
DATA
POW F
ZD7.5
TEST
DTMF0
P MUTE
RESET
COUT1
AGC CIRCUIT
AGC
CIRCUIT
RING
IMPEDENCE
PULSE
DAIL
LIMITED CURRENT
RING SELECT
STROBE
CNDET
VTX
JK1
CHARGE--
TP
TP
TP
TP
TP
TP
TP
CHARGE+
TP
TP
TP
TP
R189
22K
R0603
D9
D\362
D10
D\362
R179
NA
R0603
R178
NA
R10
R11
1K
R0603
+
C102
220UF/25V
EC10/5
R153
1M
R0603
R166
47
R0603
R186
4K7
R0603
C104
104
C0603
C120
NA
C0603
ZD9
NA
ZD7.5
ZD10
15V/0.5W
ZD7.5
+
C66
100uF/10V
EC10/5
C64
104
C0603
R88 10K
R0603
R64
10K 1/4W
R0603
R57
220K
R0603
X2
7.952
XTAL\10
L11
JUMP
4MM
C67
22P
C0603
C63
103
C0603
C76
680P 500V
CC6\5
FS1
JUMP 5MM
FUSE\12.5
L4
12uH
L10
LED1
19-21VGC/
TR8 GREEN
CHARGE
LED
RY1
500 OHM
RY1
T7
LB-0627
6
1
2
4
3
5
JK1
LINE JACK 4C
LINE\JK1
1
2
3
4
D1
D\362
R145
1K
R0603
ZD8
ZD7.5
C96
103
R0603
C77
150P
C0603
JK2
JACK DC
Q6
SOT-23
+
-
IC3D
SIP14
12
13
14
411
ZD4
NA
R89 10K
R0603
L3
JUMP
4MM
Q20
SOT-23
ZNR1
270V
ZNR\7K
R61
220K
R0603
R59
100K
R0603
R84 10K
R0603
R83 10K
R0603
C75
223
C0603
R105
4.7K
R0603
R86
47K
R0603
R58
510
R0603
R120
0
R0603
R144
20M 1/4W
R10
C80
680P 500V
CC6\5
L6
12uH
L10
C65
22P
C0603
R74
0
R0603
C71
104
C0603
R107
110 2W
R15
R99
82K
R0603
R92
10K
R0603
+
C68
0.47uF/50V
EC5\5
Q9
SOT-23
C126
224
C0603
Q7
SOT-23
Q8
SOT-23
R98
12K
R0603
L9
JUMPER
L10
L8
JUMPER
L10
L5
12uH
L10
L7
12uH
L10
+
C94
100UF\10V
EC8\5
+
C95
470UF\25V
EC10\5
R118
150 1/2W
R12.5
R100
100K
R0603
C121
103
C0603
R106
22 1/4W
R10
Q18
TO-92\EBC
R142
22 1/4W
R10
C99
103
C0603
Q21
SOT-23
+
C78
470UF/10V
EC10/5
R109
330K
R0603
R114
22K
R0603
R108
4K7
R0603
R167
10K
R0603
R111
470
R0603
ZD5
4V7
D\362
ZD3
4V7
D\362
C83
NA
C0603
R87 1K
R0603
R115
56K
R0603
R133
82
R0603
C89
NA
C0603
Q11
SOT-23
C85
683
C0603
C90
224
C0603
R126
620
R0603
R122
1K3
R0603
+
C127
47UF
R141
5K1
R0603
C92
104
C0603
R123
15K
R0603
R129
6K8
R0603
D7
2700V
R149
1K8
R0603
R148
10K
R0603
R143
510K
R0603
R119
82K
R0603
Q19
TO-92\EBC
C101
562
C0603
R150
510K
R0603
+
C97
4U7/50V
EC5\5
R171
1K
R0603
D2
D10B
R146
15K
R0603
R60
22K
R0603
+
C98
220uF
EC5\5
R91 150KR0603
R128
NA
R10
D3
D10B
D4
D10B
R127
NA
R10
Q16
SOT-23
R157
NA
R0603
R139
10M
R0603
R117
390K
R0603
R187
27K
R0603
Q13
NA
SOT-23
C88
105
C0603
R134
0
R0603
R188
10K
R0603
R172
22KL10
Q12 TO-92\EBC
R121
NA
R0603
C84
NA
C0603
R138
4K7
R0603
R130
27 R0603
R10
R124
27 R0603
R10
Q15
TO-92\EBC
R161
0
R0805
R160
0
R0805
R162
NA
R0805
R163
NA
R0805
R159
100K
R0603
R158
NA
R0603
C86
103
C0603
R116
0
R0603
C87
NA
C0603
R137
4K7
R0603
C108
104 R0603
R93
100K
R0603
R82 10K
R0603
R97
8K2
R0603
R76
NA
R0603
R151
6K8/1W
R12.5
R94
NA
R0603
R113
33/1W
R12.5
R112
1K
R0603
R135
1.5K
0603
C107
104
C0603
C106
105
C0603
R78 39K R0603
R77 20K R0603
R75 10K R0603
C93
562
C0603
C111
103
R0603
+
-
IC3A
SIP14
3
2
1
4 11
R81 160K R0603
R79 82K R0603
R180
56K
R0603
R104
4K7
R0603
C69
270P
C0603
R90
300K
R0603
R96
270K
R0603
R103
22K
R0603
C72
223
C0603
C70
223
C0603
R95
3K9
R0603
C124
224
C0603
C123
474
C0603
R181
330
R0603
+
C105
100UF/10V
EC5/5
C74
104
C0603
C73
104
C0603
C82
104
C0603
C79
104
C0603
ZD2
22V/1W
ZD7.5
D6
D10B
IC2
DIP28
1
2
3
5
6
7
8
9
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
4
10
XOUT
XIN
TEST
P66
P65
P64
P63
P62
P60
P77
P76
VSS
VDD
RST
P10
P11
P12
P13
P14
P15
P16
P17
P72
P73
P74
P75
P67
P61
R68
100K
R0603
SW1
PAGE
SW2P
ZD1
22V/1W
ZD7.5
ZD6
27V
ZD7.5
C100
1U/250V
MPC25\22
Q10
TO-92\EBC
R63
100K
R0603
IC5
DIP4
ZD7
27V
ZD7.5
R110
100K
R0603
+
C91
10uF/100V
EC5\5
D5
D10B
R62
NA
R0603
R147
0
R0603
+
-
IC3B
SIP14
5
6
7
411
R102
NA
R0603
+
-
IC3C
SIP14
10
9
8
411
C132
104
C0603
R131
100K
R0603
R132
2K2
R0603
R125
NA
R0603
R152
20M 1/4W
R10
R80 2K2R0603
R85
10K
R0603
C81 1U/250V
MPC25/22
Q17
SOT-23
Q14
SOT-23
VCPU
RING DET
VB
VREG
VB
VREG
VB
AGC2
VREG
VREG
RF-DATA
RX DATA
TX DATA
EXPO
COMP
VCPU
RINGDET
PMUTE
CR-DET
VREG
CHAG-CNTL
CHAG-CNTL
VTX
RF-STB
A
PIN2
RF-CLK
PMUTE
AGC1
AGC1
IC3 PIN7
AGC2
VREG
KX-TC1205RUB / KX-TC1205RUW / KX-TC1205RUS / KX-TC1205RUF
60