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Model
KX-TCD400RUB KX-TCD400RUC KX-TCD400RUF KX-A140RUB KX-A140RUC KX-A140RUF
Pages
81
Size
1.87 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / TELEPHONE EQUIPMENT
File
kx-tcd400rub-kx-tcd400ruc-kx-tcd400ruf-kx-a140rub-.pdf
Date
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Panasonic KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF Service Manual ▷ View online

34 SCHEMATIC DIAGRAM (BASE UNIT)
(10)
(11)
(12)
(13)
(3)
(4)
(5)
(6)
(2)
(1)
(7)
(8)
(9)
IC1
32K_EEPROM
1
A0
2
A1
3
A2
4
GND
5
SDA
6
SCL
7
WP
8
VCC
+5.5V
+4.0V
6.3V100
C41
D4
220
R42
100
R41
TP90
TP91
C40
10V100
TP89
Q9
3
ADJ
2
VOUT
1
VIN
4
VOUT
+2.65V
680P/500V
C1
100
R29
R5
220K
J1
1
2
3
4
5
6
TP45
TP39
D10P
C19
D10P
C18
Q3
D2
1.5M
R2
2.2K
R10
R6
180K
TP2
2.7K
R8
SA1
300V
100
R30
TP40
R3
220K
K0.022
C4
R4
180K
1.5M
R1
RLY1
NC
1
2
3
4
7
8
9
10
10
K
R9
K0.022
C3
100K
R7
TP5
33
R43
TP84
33
R44
+4.0V
R77
0
J2
1
GND
2
DC_PLUG
5.6M
R53
180K
R54
K0.01
C49
180K
R82
K0.01
C74
5.6M
R81
TP3
TP101
K3300P
C7
J105
1
J101
1
J104
1
J103
1
VBACK
+2.65V
J102
1
680P/500V
C2
C77
250V0.47u
C6
NC
C63
NC
C60
NC
C62
NC
C5
NC
D1
NC
LED1
NC
D8
0
D7
0
JMP3
NC
NC
JMP5
JMP7
NC
JMP2
NC
NC
JMP8
JMP4
NC
JMP6
NC
JMP1
NC
L2
NC
R85
12K
R68
NC
NC
R45
R72
NC
NC
R70
R74
NC
R71
NC
R73
NC
Q11
NC
Q1
NC
NC
Q2
OPTION4
’SCL’
’SDA’
60v
DC
LINE VOL TAGE 60V DC
+60V DC ON-HOOK
+10V DC OFF-HOOK
OV ON-HOOK 
+0.7V DC OFF-HOOK
+4.0V DC
73
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
OV ON-HOOK
DC OFF-HOOK
+9.8V
OV ON-HOOK
DC OFF-HOOK
+3.9V
RX-AF
TX-AF
+2.65V DC
1V
FREQ 10.368MHZ
TX-DATA
RX-DATA
10.368MHZ burst 
406  s
peak
+3.1V
428  s
IC2
(7725:R33 N.M./R52 0ohm)
(7795:R33   1K/R52 N.M.)
1
VDD
2
VSS
3
DRON
4
RXDSG
5
RXDA
6
SYEN
7
SYDA
8
SYCL
9
TXDA
10
PAON
11
SYRI
12
VDD
13
VSS
14
RESETQ
15
VDDPM
16
VSSO
17
LOAD
18
XTAL
19
VDDLR
20
LRB
21
VDDA
22
VSSA
23
AON
24
AOP
25
BREF
26
DLP
27
DLN
28
AIN
29
ADREF
30
ADRSSI
31
AD2(MPCINP)
32
AD3
33 PX.0
34 PX.1
35 PX.2
36 PX.3
37 VDD
38 VSS
39 SUPEEP
40 I2DAT
41 I2CLK
42 MODE
43 R2
44 R1
45
45:VBACK/P1.5
46
46:VSS(DSPCLK)
47
47:P1.4(TONE)
48 VDD
49
DSPIN/P1.0
50
DSPOUT/P1.1
51
DSPCLK/P1.2
52
DSPFRM/P1.3
53
VSS
54
VDD
55
P0.0
56
P0.1
57
P0.2
58
P0.3
59
P0.4
60
P0.5
61
P0.6
62
P0.7
63
ANT1
64
ANT2
Q8
C32
J27P
C33
C1P
C25
6.3V10
C24
K0.1
C23
K0.1
C37
K0.1
C36
K0.1
C34
K0.1
C30
K1800P
C29
K0.068
C28
K0.068
C26
K0.1
C38
K0.1
C35
K0.033
R36
0
C43
D10P
K0.47
C12
3.9K
R18
50V10
C15
D10P
C21
100
R31
K0.1
C20
D3
22
R19
TP97
150
R25
75
0
R28
33K
R22
K0.22
C14
K0.027
C11
56
R20
TP50
Q6
13K
R16
100K
R21
R12
0
56
R23
K1.0
C13
56
R32
K0.22
C22
R38
33
+2.65V
R52
0
IC3
5 RSSI
6 VCC_OC
7
8 SYCL
9 SYDA
10 SYEN
11
12
RXDSG
13
SYRI
14
GND
15
GND
16
GND
17
GND
18
GND
19
GND
20
RXDA
21
GND
22
GND
23
24
PSEL
25
PAON
26
GND
27
VCC_PA
28
GND
29
GND
30
GND
31
GND
32
GND
33
RF1
34
GND
1
2
3
TXDA
4
VBACK
+2.65V
R57
10K
L1
4.7uH
C48
J33P
R58
10K
+2.65V
R66
39
C57
C3P
R67
39
C55
D10P
A201
1
DA1
C58
C2P
C54
C6P
A202
1
C56
D10P
TP187
TP188
X1
10.368MHz
TP82
TP1
L3
33nH
C69
C2P
C72
C2P
R78
180
R79
180
ANT
C66
C2P
C67
K4.7
C73
D10P
D5
C75
C2P
C78
D10P
0
C80
R86
0
R88
0
R87
0
C86
0
Q7
10K
R26
2.2K
R27
10
R24
S1
NC
3
4
2
1
C76
C6P
C27
K0.1
C71
NC
NC
C16
C79
NC
C10
NC
C82
NC
C68
NC
C70
NC
C84
NC
C53
NC
NC
C50
C81
NC
C83
NC
C17
NC
C51
NC
NC
C9
C87
NC
C85
NC
C8
NC
NC
D6
NC
R14
R35
NC
NC
R17
R33
NC
R55
NC
NC
R13
NC
R11
R56
NC
NC
R15
Q4
NC
Q5
NC
GND
GND
GND
GND
GND
GND
(10)
(11)
(12)
(13)
(3)
(4)
(5)
(6)
(2)
(1)
(7)
(8)
(9)
KX-TCD400RUB/RUC/RUF  SCHEMATIC DIAGRAM (BASE UNIT)
74
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
35 SCHEMATIC DIAGRAM (HANDSET)
Frequency 324KHz
4.3V
0V
2.4V
4.1V DC
2.65V
0V
2.65V
0V
2.65V
0V
2.65V 0V
2.65V
0V
Q2
R6
3.3K
IC2
1
A0
2
A1
3
A2
4
GND
5
SDA
6
SCL
7
WP
8
VCC
L2
47uH
Q1
G
S
D
R2
0.3
D1
C15
10V220
IC1
1
P
L.29
2
P
L.30
3
VDD
4V
S
S
5
P
L.31
6
P
L.32
7
P
L.33
8
P
L.34
9
P
L.35
10
DR
ON
11
RXDSG
12
RXD
A
13
SYEN
14
SYD
A
15
SYCL
16
TXD
A
17
PY
.0
18
PY
.1
19
PY
.2
20
PY
.3
21
PY
.4
22
P
A
ON
23
SYRI
24
VDD
25
VSS
26
ONSW
27
CDT
28
DCDCDR
V
29
DCDCCMR
30
RESETQ
31
VSSO
32
LOAD
33
XTAL
34
VDDPM
35
VDDLO
36
VDDBAT
37
VDDLR
38
CHARGE_START(P0.2)
39
VDDA
40
VSSA
41
HON
42
HOP
43
BREF
44
MICS
45
MICP
46
MICN
47
ADREF
48
ADRSSI
49
P0.4(ADBAT)
50
P0.5(AD4N)
51
51:P0.6(AD4P)
52
P0.3
53
PX.0
54
PX.1
55
PX.2
56
PL.0
57
PL.1
58
PL.2
59
PX.3
60
PX.4
61
PL.3
62
PL.4
63
VDD
64
VSS
65
SUPEEP
66
I2D
A
T
67
ISCLK
68
MODE
69
R2
70
R1
71
VBA
CK/P0.7
72
PL.5
73
PL.6
74
PL.7
75
PL.8
76
PL.9
77
VDDLI
78
PL.10
79
PL.11
80
PL.12
81 PL.13
82 PL.14
83 PL.15
84 PL.16
85 VSS
86 VDD
87 PL.17
88 P0.0
89 P0.1
90 PL.18
91 PL.19
92 PL.20
93 PL.21
94 PL.22
95 PL.23
96 PL.24
97 PL.25
98 PL.26
99 PL.27
100
PL.28
C2
K4.7
R4
10K
C3
K0.1
S11
S7
S20
S5
S3
S18
S25
S23
S15
S16
S4
S22
S21
S8
S9
C18
K0.1
C20
K0.1
C21
K0.1
C22
K0.1
C23
K0.1
C27
K0.1
R11
0
R21
0.1
F1
S24
S19
S14
S2
S1
CN2
1
C5
2
C4
3
C3
4
C2
5
C1
6
C0
7
S29
8
S28
9
S27
10
S26
11
S25
12
S24
13
S23
14
S22
15
S21
16
S20
17
S19
18
S18
19
S17
20
S16
21
S15
22
S14
23
S13
24
S12
25
S11
26
S10
27
S9
28
S8
29
S7
30
S6
31
S5
32
S4
33
S3
34
S2
35
S1
36
S0
TP10
TP8
TP12
TP7
S13
S6
R16
NC
R19
15K
D2
NC
C33
K2.2
TP3
TP4
TP5
TP6
S17
TP14
R3
56
C14
10V220
L4
10uH
L5
10uH
D4
39V(M)
CN3
1
BATTERY+
2
BATTERY-
CN1
1
CHARGE+
2
CHARGE-
TP18
Q3
PX.0
PX.1
PX.2
PY
.4
PY
.3
PY
.2
PY
.1
PY
.0
PL.0
PL.1
PL.2
PL.3
PL.4
PL.5
PL.6
PL.7
PL.8
PL.9
PL.10
PL.11
PL.12
PL.13
PL.14
PL.15
PL.16
PL.17
PL.18
PL.19
PL.20
PL.21
PL.22
PL.23
PL.24
PL.25
PL.26
PL.27
PL.28
PL.29
PL.30
PL.31
PL.32
PL.33
PL.34
PL.35
PL.0
PL.1
PL.2
PL.3
PL.4
PL.5
PL.6
PL.7
PL.10
PL.12
PL.14
PL.15
PL.17
PL.19
PL.21
PL.25
PL.28
PL.30
PL.32
PL.34
PX.3
PX.4
PL.8
PL.9
PL.11
PL.13
PL.16
PL.18
PL.20
PL.22
PL.23
PL.24
PL.26
PL.27
PL.29
PL.31
PL.33
PL.35
PX.1
PX.0
PY.0
PX.2
PY.1
PX.3
PX.4
PY.4
PY.4
PY.3
PY.2
’9’
’2’
’4’
’1’
’TEL 
BOOK’
’7’
’REDIAL’
’6’
’0’
’R’
’5’
’ ’
’8’
’TALK’
’#’
’3’
’LEFT’
’RIGHT’
’Cancel’
’INT’
’DOWN’
’UP’
’*’
’BATT’
’SDA’
’SCL’
’GND’
’VBACK’
(1)
(25)
(7)
(6)
(5)
(4)
(3)
(2)
(26)
(27)
(28)
(29)
(30)
 (38)
(31)
(24)
(8)
~
(32)
(33)
(37)
(34)
~
75
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
TX-AF
RX-AF
1.8V DC IN TALK MODE
Frequency 10.368MHz
TX - DATA
RX - DATA
1V
MIC
R5 330
C4 K0.1
R1 2.2K
R7 330
C5
6.3V4.7
C6
D10P
C7
K0.1
R8
330
C8
D10P
C10
D10P
C11
D10P
C16
C1P
C17
J18P
S10
C24
K0.1
C26
K0.1
C28
K0.1
C29
K0.1
C30
K0.1
R12
NC
C12
D10P
C31
D10P
R18 33
C57
J33P
A201
L3
4.7uH
D3
R20 0
R17 0
TP11
TP1
TP2
R23
2.2
C62
K1.0
C60
K4.7
R22
0
C63
D10P
C64
K1.0
X1
TP13
C55
C2P
C56
C2P
C54
D10P
TP17
TP16
C65
C2P
C25
NC
D5
NC
C66
C2P
TP15
IC3
5
RSSI
6
VCC_OC
7
GND
8
SYCL
9
SYDA
10
SYEN
11 GND
12
RXDSG
13
SYRI
14
GND
16
GND
17
GND
18
GND
19
GND
20
RXDA
21
GND
22
GND
23
GND
24
PAON
25
GND
26
GND
27
VCC_PA
28
GND
29
GND
30
GND
31
GND
32
GND
33
RF1
34
GND
GND
1
GND
2
GND
3
TXDA
4
CN5
1 SP+
2 SP-
D6
D7
TP19
R24 0
’POWER’
SP
-
+
400
µ
s typically
2.5V 
0.5V 
0V 
(1)
(25)
(7)
(6)
(5)
(4)
(3)
(2)
(26)
(27)
(28)
(29)
(30)
 (38)
(31)
(24)
(8)
~
(32)
(33)
(37)
(34)
~
KX-A140RUB/RUC/RUF  SCHEMATIC DIAGRAM (HANDSET)
76
KX-TCD400RUB / KX-TCD400RUC / KX-TCD400RUF / KX-A140RUB / KX-A140RUC / KX-A140RUF
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