Read Panasonic KX-TCD755RUS Service Manual online
19 SCHEMATIC DIAGRAM (HANDSET)
C65
10pF
10pF
C44
10nF
C7
10pF
K12
TP11
TP2
TP32
C3
100n
+3.6V
K17
TP43
L1
22uH
R35
820K
C10
22pF
22pF
C66
10pF
10pF
K24
T5
E
C
B
TP52
C52
100n
R12
180R
C56
100n
R20
180R
R5
33R
D4
TP65
T11
E
C
B
+3.6V
T1
E
C
B
D2-B
R25
N.M.
+2.65V
TP72
K19
R18
56K
TP66
K9
J4
R21
470R
C62
10pF
R68
100R
R22
12R
D1-B
D3-B
D5
TP45
R17
68K
K10
R59
10K
C41
10p
K11
TP47
R11
180R
K16
L3
10u
D13
Green
D1-A
K2
R8
470R
C64
220nF
220nF
D2-A
R27
22R
C16 100n
TP10
TP1
TP31
D3-A
+2.65V
C22
10pF
R4
33R
K1
R9
22K
R6
470R
C33
10nF
SDC
C14
100nF
J6
2.5mm Jack
2
3
4
5
4
5
1
K25
J3
C43
10nF
R16
0R1
LS1
2
1
C25
10p
10p
R36
430K
K18
R1
2K2
K7
TP33
C23
10pF
K8
R43
56R
TP30
C5
100nF
T7
E
C
B
C40
220nF
220nF
C67
10pF
10pF
TP6
C24
1n8
K4
TP9
C2
100n
TP29
C31
10nF
R24
470R
C46
10nF
D11
Green
C13
100nF
D12
Green
C15
100nF
C32
10nF
C8
33nF
K23
C39
220nF
220nF
TP67
TP53
SP+
C12
100nF
J5
LCD Connector
7
14
20
3
4
6
5
15
17
18
13
12
11
16
9
10
19
8
TP28
TP18
D16
C68
10pF
L4
1000R
C30
10nF
R67
100R
R7
12R
C6
1p2
+3.6V
TP23
TP24
IC4
5
VOUT1
3
VREF2
4
-VIN
2
VREF1
8
VOUT2
7
GND
1
CD
6
V+
C42
10nF
10nF
TP39
D17
Red
J1
R28
22R
+2.65V
C53
100n
C11
10pF
T3
S
D
G
C4
100uF/10V
C27
10p
10p
D7
4V7
C35
10u/10V
SP-
D14
Green
R23
12R
12R
TP21
L2
10u
K15
J2
TP50
R51
3K9
TP26
M1
C36
100nF
C60
N.M.
K3
R2
180K
K5
SP_Key
TP19
C63
220nF
220nF
TP27
C59
100n
100n
D9
4V7
SDA
K21
X1
10.368MHz
C61
10p
10p
K6
K20
R37
220K
TP44
C18
4u7/10V
TP17
K22
T12
E
C
B
TP22
D18
N.M.
TP64
D19
N.M.
C57
10nF
K13
K14
(IP)
(IP)
(IP)
(IP)
IC1
I2CLK
65
I2DAT
64
SUPEEP
63
RESETQ
28
MODE
66
VDDA
37
VSSA
38
VDD
1
VDD
22
VDD
61
VDD
84
VSS
2
VSS
23
VSS
62
VSS
83
BREF
41
NC
88
P1.0
78
P1.1
79
P1.2
80
PO.0/RXD
86
PO.1/TXD
87
CHARGESTART(P0.2)
36
PO.3/DSPIN
50
ADBAT(PO.4)
47
AD4N(PO.5)
48
AD4P(PO.6)/DSPOUT
49
VBACK/PO.7
69
D0
3
D1
100
D2
99
D3
98
D4
97
D5
96
D6
95
D7
94
CSROQ
85
A0
4
A1
5
A2
6
A3
7
A4
54
A5
55
A6
56
A7
59
A8
76
A9
77
A10
82
A11
81
A12
60
A13
74
A14
73
A15
70
BSEL0(A16)
71
BSEL1(A17)
72
PX.2
53
PX.1
52
PX.0
51
PX.3
57
ADRSSI
46
TXDA
14
RXDA
10
PAON
20
DRON
8
RXDSG
9
SYDA
12
SYCL
13
SYEN
11
SYRI
21
R1
68
R2
67
MICN
44
MICP
43
HOP
40
HON
39
LOAD
30
VSSO
29
XTAL
31
DCDCCMR
27
DCDCDRV
26
VDDLR
35
MICS
42
PY.0
15
PY.1
16
PY.2
17
PY.3
18
PY.4
19
PX.4
58
NC
89
VDDBAT
34
VDDLO
33
ON
24
VDDPM
32
VDDLI
75
CDT
25
ADREF
45
CSRAQ
92
WRRAQ
91
OERAQ
90
BSEL2(A18)
93
C49
2u2
C58
33n
TP70
C29
10pF
C20
10pF
C17
10pF
C21
10pF
C34
10pF
C38
10pF
R19
100K
C55
470n
TP37
C19
10p
10p
R30
100K
100K
C26
10pF
IC2
8
VCC
1
A0
3
A2
4
VSS
6
SCL
5
SDA
7
WP
2
A1
R34
10K
10K
R38
10K
10K
+2.65V
DL2
GND
DL1
R13 10K
+2.65V
IC3
10
A16
11
A15
12
A12
13
A7
14
A6
15
A5
16
A4
17
A3
18
A2
19
A1
20
A0
21
D0
22
D1
23
D2
25
D3
26
D4
27
D5
28
D6
29
D7
30
CE
31
A10
32
OE
1
A11
2
A9
3
A8
4
A13
5
A14
6
A17
7
WR
8
VCC
9
A18
24
GND
R60 10K
C37
10nF
R3
10K
R10
1K
TP71
C45
10nF
C9
10pF
C48
10pF
C50
10pF
R31
10K
C28
N.M.
C1
100n
TP13
TP12
F1
2A
2.4V_PA
C51
470nF
C47
100n
R14
0R1
R15
180K
TP7
T8
TP3
D21
4V7
4V7
TP5
D8
R32
N.M.
TP4
ADR05
ADR00
ADR06
ADR07
ADR07
ADR13
ADR17
ADR01
ADR02
ADR02
ADR16
ADR03
ADR06
ADR11
ADR12
ADR12
ADR17
ADR08
ADR09
ADR09
ADR05
ADR10
ADR11
ADR11
ADR03
ADR01
ADR12
ADR10
ADR13
ADR14
ADR14
ADR09
ADR14
ADR07
ADR15
ADR15
ADR15
ADR02
ADR16
ADR04
ADR04
ADR08
R1
R1
SP_AMP
SP_AMP
SPLED
DL2
DL1/IHN-RS
DL1/IHN-RS
CS/CE
CS/CE
DISDATA
DISDATA
HS_DET
SYDA
SYEN
SYCL
SYRI
RXDSG
RSSI
TXDA
RXDA
DRON
PSEL
BATTERY
CHARGE
GREEN
RED
B
E
C
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
3.6V DC
Frequency
160kHz
160kHz
3.4V to 4.8V
SWITCHING
DURING
CHARGE
SWITCHING
DURING
CHARGE
2.4V
2.65V
0V
2.65V
0V
RX-AF
TX-AF
RING
1.8V DC IN TALK MODE
Frequency
10.368MHz
10.368MHz
1V
0V
4.1V
83
KX-TCD755RUS
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