Panasonic KX-TCD755RUS Service Manual ▷ View online
18 SCHEMATIC DIAGRAM (BASE UNIT)
(1)
(5)
(6)
(7)
(8)
(9)
(10 )
(11)
(2)
(3)
(4)
R86
N.M.
TP43
R60
390R
TP65
R1
N.M.
SA3
C37
N.M.
R34
N.M.
C93
N.M.
TP14
C25
N.M.
N.M.
C35
N.M.
N.M.
R17
15R 1W
C42
100uF/10V
100uF/10V
TP2
TP44
TP40
TP66
JMP16
N.M.
R55
100K
R72
10R
C14
22nF 630V
R38
180K
180K
C27
4.7nF
TP45
JMP18
N.M.
TP48
R58
N.M.
C23
3n3/500V
JMP13
N.M.
TP12
TP88
J2
DCJACK
1
2
3
2
3
T11
E
C
B
TP186
T3
N.M.
E
C
B
+3.3V
R7
180K
C48
1uF
R73
10K
R19
1M5
R9
220K
R56
56R
56R
T7
E
C
B
R39
10K
C22
N.M.
R49
N.M.
TP73
GND
D1
N.M.
JMP17
N.M.
TP70
TP71
TP84
C5
TP90
R35
100K
R36
2K7
R59
390R
R41
33K
33K
+2.65V
JMP3
N.M.
TP50
C17
680pF/500V
C44
10pF
10pF
C34
C28
220nF
R37
220K
220K
R20
180K
C32
10nF
10nF
R74
2K2
R54
18K
18K
T5
N.M.
N.M.
E
C
B
R27
N.M.
D8
0.5A 600V
1
2
3
4
C21
N.M.
L3
C33
N.M.
C12
22nF 630V
TP26
R30
0R
C45
100uF/10V
100uF/10V
RL1
N.M.
12 +
8 10 7
6
3
5
1
-
+2.65V
C36
2u2/50V
R32
N.M.
R12
5M6
T13
E
C
B
TP89
C1
10nF
R21
1M5
JMP19
0R
C24
N.M.
T9
E
C
B
R40
2K2
TP51
TP49
R31
N.M.
TP15
R23
180K
TP69
T8
E
C
B
R57
22R
22R
T4
N.M.
E
C
B
J1
TelJack
1
2
3
4
5
6
R70
5K6
R85
N.M.
TP52
D10
30V
TP39
C16
680pF/500V
TP95
TP16
C40
100uF/16V
JMP9
N.M.
N.M.
N.M.
R26
N.M.
TP67
JMP4
N.M.
C26
N.M.
TP54
R43
150R
TP5
TP77
T2
N.M.
E
C
B
R33
N.M.
C47
2.2uF
R3
5M6
C29
N.M.
IC2
2
VOUT
ADJ
1
3
VIN
4
VOUT
R122
N.M.
JMP15
N.M.
CLIP_STATE
HOOK
DTXAF
TXAF
LINE_C
LINE_C
VUNREG
CHARGE_PULSE
DTXAF
EARTH
Positive charge terminal
Negative charge terminal
2.65V DC
3.3V DC
TX-AF
0V ON-HOOK
+0.7V OFF-HOOK
+0.7V OFF-HOOK
RX-AF
0V ON-HOOK
+2.8V OFF-HOOK
+2.8V OFF-HOOK
0V ON-HOOK
+4.6V DC OFF-HOOK
+4.6V DC OFF-HOOK
+60V DC ON-HOOK
+4.8V DC OFF-HOOK
+4.8V DC OFF-HOOK
LINE VOLTAGE 60V DC
60V
DC
DC
81
KX-TCD755RUS
(1)
(5)
(6)
(7)
(8)
(9)
(10 )
(11)
(2)
(3)
(4)
C6
470pF
R13
56R
D9
4V7
4V7
C19
10p
+3.3V
R15
390R
ANT202
Antenna
1
2
2
TP103
C122
N.M.
TP3
TP105
TP75
J103
TP4
+2.65V
R25
1K
R44
10K
TP6
C10
10p
TP104
TP202
B0
J100
ANT201
Antenna
C49
10p
TP206
TP101
R64
10K
R29
100R
TP93
C11
10p
TP57
C66
33nF
C8
10pF
TP8
TP205
C38
68pF
D7
4V7
B1
C58
100nF
C56
100nF
C55
100nF
R45
10K
K1
+2.65v
TP107
C7
N.M.
C79
100n
C84
10pF
R2
390R
B2
R61
10K
C51
3p9
R42
100R
C13
10p
C62
100nF
R46
1K8
C63
10pF
TP97
TP82
C43
10p
C53
12pF
+2.65V
R8
2K2
IC5
39VF020-70
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
24
GND
8
VCC
9
A18
C64
68n
IC9
8
VCC
1
A0
3
A2
4
GND
6
SCL
5
SDA
7
WP
2
A1
C39
10p
R47
N.M.
C3
470p
R53
100R
C2
10pF
C20
10p
TP117
J104
TP1
J102
C54
10OnF
IC6
I2CLK
64
I2DAT
63
RESETQ
23
MODE
67
VDDA
33
VDD
1
VDD
21
VDD
59
VDD
85
VSSA
34
VSS
2
VSS
22
VSS(T_DSPCLK)
73
VSS
84
PO.0
87
PO.1
88
PO.2
90
PO.3
91
PO.4/TXD
93
PO.5/RXD
94
PO.6
95
PO.7
97
D0
3
D1
9
D2
7
D3
5
D4
92
D5
98
D6
96
D7
11
OERAQ
83
WRRAQ
68
CSRAQ
89
A0
18
A1
16
A2
86
A3
19
A4
70
A5
61
A6
74
A7
66
A8
77
A9
54
A10
14
A11
81
A12
56
A13
75
A14
79
A15
65
PX.2
55
PX.1
53
PX.0
51
PX.3
57
ADRSSI
46
TXDA
15
RXDA
8
DRON
4
RXDSG
6
SYDA
12
SYCL
13
SYEN
10
SYRI
20
ANT1
99
ANT2
100
R2/P1.7
69
R1/P1.6
71
DLN
42
DLP
40
AOP
37
AON
36
LOAD
27
VSSO
25
XTAL
28
PADN(TXSWON)
17
AIN
43
VSS
60
A18
62
A16
52
A17
58
VBACK/P1.5
72
DSPIN/P1.0
76
DSPOUT/P1.1
78
DSPCLK/P1.2
80
DSPFRM/P1.3
82
ADREF
45
AD3
49
AD2/(MPCINP)
48
VDDPM
24
VDDLR
30
LRB
31
BREF
39
NC
26
NC
29
NC
32
NC
35
NC
38
NC
41
NC
44
NC
47
NC
50
TP7
+2.65V
IC1
RFMODULE
25
SYRI
34
PAON
24
DRON
21
RXDSG
20
RXDA
13
TXDA
18
TXDA
37
RF2
44
RF1
11
RSSI
6
3.3V
7
3.3V
2
GND
12
SYRI
17
SYEN
14
SYCL
15
SYDA
1
ANT1
35
ANT2
TP109
J101
R4
100R
+3.3V
C60
10pF
TP108
C9
N.M.
C4
100n
X1
10.368MHz
TP201
TP119
R62
18K
R16
1K0
C57
100nF
TP98
D16
BUZ1
2
1
C80
100pF
T6
E
C
B
A[6]
A[18]
A[6]
RXAF
A[17]
A[3]
A[1]
A[14]
A[5]
A[00-17]
A[18]
PULSE_DIAL
MODE_SEL
MODE_SEL
MODE_SEL
A[9]
A[0]
A[7]
A[11]
A[17]
A[13]
A[0]
A[15]
A[13]
DTXAF
DTXAF
A[7]
SDA
A[16]
A[2]
A[10]
A[5]
A[15]
TXAF
SCL
A[11]
A[1]
A[2]
A[3]
A[2]
A[3]
A[17]
A[12]
A[8]
A[4]
VUNREG
A[8]
A[12]
DTXAF
DTXAF
A[10]
A[14]
A[4]
A[9]
GND
H2
Z3
H3
PAGE
Z2
Z1
H1
Hardware Version Resistor
Z4
FREQ 10.368MHz
1V
KX-TCD755RUS SCHEMATIC DIAGRAM (BASE UNIT)
RXAF
DTXAF
LINE_C
CHARGE_PULSE
DTXAF
LRB
LRB
RX-DATA
TX-DATA
10.368MHz burst
+2.5V peak
70ns 700ms
RING
82
KX-TCD755RUS
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
TX-DATA
RX-DATA
10.368MHz burst
2V
400
m
s typically
0.8V
0V
RXDA
DRON
PSEL
C417
10n
D400
2
3
1
TP20
C420
10p
C405
10p
C458
3p3
C447
4p7
C438
1p8
C443
1p8
VCC
T400
E
C
B
C421
10p
C412
47p
+2.4V_PA
R406
10R
C407
10p
C451
N.M.
C449
18pF
C452
N.M.
C450
10p
C432
10p
C428
10p
C409
1n
C436
10p
R408
560R
R413
3K3
R418
1R0
TP41
TP35
R409
330R
L402
22nH
VCC
TP68
C418
1p8
C422
10p
C439
1p
C445
10p
VCC
C410
10n
A1
Antenna
1
2
2
C424
1p8
R414
N.M.
C463
3p3
3p3
C406
330p
C408
33p
+3.6V
C427
10p
R411
4K7
C414
2n2
2n2
VCC
C441
12p
C457
3p3
C415
10p
C413
10n
R410
27K
27K
C444
2p2
C423
3n3
C434
18pF
C429
10n
C419
10p
C448
4p7
R412
2K7
C403
N.M.
C433
10p
C442
N.M.
C446
100n
R417
2K7
C404
10p
IC402
35
VCCRXIF
31
VCC2
30
GNDREG2
29
VCOK1
28
VCOK2
7
VCCRXRF
9
RF
6
DIREF
13
BPNP
4
NC
5
NC
3
DRX
1
RXREF
2
DR
26
PD
33
GNDC
32
GNDRXIF
34
RXDA
11
RXON
27
GNDTX
10
RFX
25
ICHP
24
SYEN
22
SYCL
23
SYDA
20
RXDSG
21
SYRI
38
SHC
36
PF
37
SHR
12
VCC1
17
TXDA
15
VCCBG1
14
VCCPLL
16
GNDREG1
19
RSSI
18
GNDPLL
8
GNDRXRF
C402
10pF
IC400
4
PIX
1
PSET
2
VCCS
5
PRAMP
7
PSEL
6
PAON
10
VCC
3
PI
9
PO
8
POX
R415
470R
R419
N.M.
C400
3p3
R416
330R
C462
10p
C426
10nF
C431
N.M.
C461
10p
C459
18p
TP73
TP73
C437
220p
R420
10R
C411
22n
C464
10p
C435
2p7
C456
3p3
C460
2u2
+2.4V_PA
+2.4V_PA
DRON
PSEL
Z2
Z401
H6
Fiducial Mark
H3
H2
H1
H4
H8
Z1
H5
H7
+/- 0.1pF
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
TXDA
SYDA
SYEN
SYCL
SYRI
RXDSG
RSSI
KX-TCD755RUS SCHEMATIC DIAGRAM (HANDSET)
84
KX-TCD755RUS
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