Panasonic KX-T7730RU Service Manual / Supplement ▷ View online
6
KX-T7730RU
1.3.
SCHEMATIC DIAGRAM
Change from the Original Service Manual Section 15.
KX-T7730RU MAIN BOARD (1/2)
(1)
(2)
(3)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(30)
(31)
(32)
(33)
(33)
(34)
(35)
(11)
(12)
(12)
2.4V
2.8V
1.5V
1.5V
2.7V
2.8V
5.4V
5.3V
2.0V
0
0
0
2.8V
2.7V
2.5V
2.9V
2.8V
2.7V
2.8V
2.8V
2.8V
2.2V
1.5V
2.1V
2.1V
0
0
2.8V
6.1V
2.9V
2.8V
4.6V
SP-Phone
Transmission
Signal
Transmission
Signal
Ringer
Signal
Signal
3.3V : The handset is in use
0V : The speakerphone is in use
0V : The speakerphone is in use
On using the speakerphone
SP-Phone
Recepton Signal
Recepton Signal
GR
GR
GR
GR
GR
GR
GR
GR
GR
GR
GR
GR
C
L0
L1
L2
L3
L4
L5
L6
L7
C3
C2
C1
C0
C2
C1
C0
K0
K1
K2
K3
K4
K6
K5
C4
C5
D9
Q11
1
B1
2
E
3
B2
4
C2
5
C1
Q12
1 B1
2 E
3 B2
4
C2
5
C1
Q15
1
B1
2
E
3
B2
4
C2
5
C1
Q16
1
B1
2
E
3
B2
4
C2
5
C1
Q105
1
Tr1_B
2
E
3
Tr2_B
5
Tr1_C
4
Tr2_C
Q106
1
Tr1_B
2
E
3
Tr2_B
5
Tr1_C
4
Tr2_C
Q107
1
Tr1_B
2
E
3
Tr2_B
5
Tr1_C
4
Tr2_C
Q108
1
Tr1_B
2
E
3
Tr2_B
5
Tr1_C
4
Tr2_C
IC8
1
I/O
2
O/I
3
VSS
5
VDD
4
CONT
IC3
1
RR
2
RTX
26
RXO
27
RXI
3
TXI
28
RRX
4
TXO
25
ACF
5
TLI
24
VLC
6
TLO
23
XDC
7
RLI
22
Gnd
8
RLO
21
VB
9
MCI
20
VCC
10
MCO
19
SKI
11
CP1
18
*CS
12
CP2
17
AGC
13
XDI
16
V+
14
SKG
15
SKO
D30
D31
D32
D33
D34
C50 2.2u
C51
2.2u
C131
0.1u
C24
0.1u
C27
0.1u
C32
0.1u
C34
0.1u
C48 0.1u
C59
0.1u
C61
0.1u
0.1u
C64
0.1u
C60 0.022u
C47 0.033u
C49 0.033u
C44 0.047u
C45 0.047u
C46
0.047u
C62
0.047u
C213
1000p
C29
0.01u
C65 0.01u
C66
0.01u
C67
0.01u
C84
0.01u
C209
2200p
C28
2200p
C25
10u
C30
220u 6.3
X1
20M
1
2
3
R206
1k
R240
1k
R31
1k
R129
10k
R231
10k
R30
100k
R52
100k
R58
100k
R73
100k
R59
12k
R68
120k
R76
120k
R140
15
R36
150
R60
1.5k
R55
150k
R37
18k
R54
18k
R131
220
R133
220
R135
220
R57
2.2k
R208
22k
R67
220k
R48
2.2M
R70
27k
R238
270k
R51
2.7M
R49
30k
R45
3.3k
R80
33k
R84
330k
R79
39k
R26
4.7k
R44
4.7k
R78
47k
R25
470k
R29
470k
R43
470k
R236
5.1k
R132
56
R134
56
R27
5.6k
R46
5.6k
R47
5.6k
R74
5.6k
R69
56k
R87
6.8k
R50
68k
R75
68k
R56
3.3
C31
10u
C52 10u
C55 10u
D18
3
4
1
2
D19
3
4
1
2
D20
3
4
1
2
D21
3
4
1
2
D22
3
4
1
2
D23
3
4
1
2
D24
3
4
1
2
D25
3
4
1
2
D26
3
4
1
2
D27
3
4
1
2
D28
3
4
1
2
D29
3
4
1
2
D17
D16
D15
D14
D13
D11
R136
56
C43
NC
AG
AG
AG
R235
N
C
C133
NC
AG
AG
AG
AG
R19
NC
R20
NC
AG
AG1
AG
AG
C214 NC
D3.3V
AG
AG
AG
AG
C68
NC
AG
AG
AG
+6V
AG
AG
AG
+6V
AG
D3.3V
DG
D3.3V
DG
R121
NC
DG
DG
D3.3V
D3.3V
R88
2.7k
AG
R89
68k
D3.3V
AG
R85
NC
AG
AG
D3.3V
DG
R153 NC
D3.3V
AG
D3.3V
R38
6.8k
AG
R296
NC
R144
470
R90
470
AG
AG1
JK2
1
2
3
4
2
3
4
5
JK3
1
2
5
3
4
4
C211
0.01u
B1
B2
B3
B4
B5
B6
B7
A1
A3
A5
A7
A8
A9
A2
A4
A6
E4
E3
E1
E2
E5
E6
M3
AG2
SP+
SPN
K1
N5
N6
N7
N8
SP1
SP2
M2
M1
AG1
K2
N1
N2
N3
N4
CN9
NC
1
2
3
4
CN2-1
MICP
CN2-2
MICN
CN3-1
SPP
CN3-2
SPN
CN4-2
CN4-1
CN5-1
CN5-2
C57
1000u
10
AG
SW1
5
4
1
3
6
2
SW16
1
SW22
2
SW28
3
SW34
4
SW40
5
SW46
6
SW15
7
SW21
8
SW27
9
SW33
*
SW39
0
SW45
#
SW41
REDIAL
SW47
<
SW43
SP-PHONE
SW48
>
SW49
V
SW50
&+
SW11
CO12
SW12
CO11
SW13
CO10
SW14
CO9
SW17
CO8
SW18
CO7
SW19
CO6
SW20
CO5
SW23
CO4
SW24
CO3
SW25
CO2
SW26
CO1
SW29
CONF
SW30
FWD/DND
SW31
MUTE
SW32
STORE
SW35
M.W
SW36
PAUSE
SW37
FLASH
SW38
TRANSFER
SW44
ICM
SW51
PROGRAM
R28
3.3k
R34
3.3k
G1
G2
CN7-6
CN8-1
CN8-5
CN7-7
CN7-3
CN8-2
CN8-3
CN8-6
CN8-4
CN8-7
CN7-5
CN7-4
CN7-1
CN7-2
R66 NC
C71
NC
R62
NC
C73
NC
C72 NC
R64
NC
R65
NC
C74
NC
R63
NC
C75
NC
R207
NC
C76
NC
AG
AG
AG
AG
AG
Q6
Q10
Q13
Q14
Q21
Q22
AG
A5V
Q111
Q112
Q113
Q114
DG
DG
DG
IC2
4
VSS
1
OUT
2
VDD
3
NC
1
CD
2
+VREF
6
V+
7
GND
3
+VIN
8
VOUT2
4
-VIN
5
VOUT1
J2
NC
J3 NC
R61
0
Q8
Q9
Q18
C56
220u 10
C106
0.01u
C107 0.1u
C35
1u
C53
47u 6.3
C54
100u 6.3
C58 4.7u
C63
100u
6.3
C86
0.01u
RA2
1.2k
1
2
3
4
5
6
7
8
6
7
8
D12
R232
15k
R71
10k
R72
3.9k
R39
8.2k
R40
6.8k
R139 33
R137
100
R138
56
CN8
CN7
CN2
CN3
CN4
CN5
CN8
CN7
IC4
NC
7
KX-T7730RU
KX-T7730RU MAIN BOARD (2/2)
(1)
(2)
(3)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(30)
(31)
(32)
(33)
(33)
(34)
(35)
(11)
(12)
(12)
1.7V
1.5V
1.6V
0
0
0
0
3.3V
3.3V
3.3V
3.3V
3.3V
0
0 0
0
3.3V
3.3V
3.3V
3.3V 3.3V
13.5V
1.8V
0
0
0
0
0
(3.0V)
4.6V
2V
2V
2V
2V
2V
2V
1.6V
3.3V
0
0
3.3V
0
0
3.3V
0
3.3V
5.4V
6.1V
20V
Handset
Recepton Signal
Recepton Signal
1.8V
1.3V
0
2.0MHz
3.3V
0
0
Handset
Transmission
Signal
Transmission
Signal
DTMF
Signal
for Dial
Signal
for Dial
3.3V
0
0
0
3.3V
3.3V
0
K0
K6
K5
K4
K3
K2
K1
C0
C1
C2
C3
C5
C4
L7
L6
L5
L4
L3
L2
L1
L0
L6
L5
L4
L3
L2
L1
L0
D6
Q101
Q109
1
B1
2
E
3
B2
4
C2
5
C1
IC7
3 OUT
2
GND
1
VCC
IC5
1 I/O1
2 O/I1
2 O/I1
12
CONT4
13
CONT1
3 O/I2
14
VDD
4 I/O2
11
I/O4
5 CONT2
10
O/I4
6 CONT3
9
O/I3
7 VSS
8
I/O3
D10
D3
D4
D5
D7
C8
0.22u
C103 2.2u
C113 2.2u
C112 2.2u
C114 2.2u
C115 2.2u
C116
2.2u
C21
0.1u
C26
0.1u
C41
0.1u
C42
0.1u
C81
0.1u
16
C91 0.1u
C14
0.047u
C93 0.047u
C208
1000p
C212
1000p
C6
1000p
C101
0.01u
0.01u
C22
0.01u
C12
0.015u
C23
0.015u
C33
0.015u
C130
330p
330p
C7
820p
C215
220u
6.3
T2
1
2
4
5
6
7
10
9
8
CN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R106
1k
R108
1k
R81
10k
R91 10k
R93
10k
R97
10k
R99
10k
R1 100k
R289
100k
R96
100k
R23
120
R82
1.5k
R126
15k
R156
15k
R98
15k
R14
18
R42 18k
R92
18k
R9
20k
R101
220
R102
220
R12
2.2k
R123
2.2k
R201
2.2k
R2
22k
R86
220k
R10
2.7k
R103
2.7k
R128
2.7k
R21
2.7k
R7
27k
R24
270k
R234
30k
R22
3.3k
R127
33k
R230
33k
R233
39k
R32
39k
R5
47
R237
470
R107
4.7k
R41
4.7k
R125
470k
R13 470k
R95
470k
R16
56
R105
68
R6
680
R15
6.8k
R4
68k
R77
8.2k
IC1
17
P3_5
18
P3_4
19
P3_3/*INT3
20
P2_7
21
P2_6
22
P2_5
23
P2_4
24
P2_3
25
P2_2
26
P2_1
27
P2_0
28
P3_6
29
P3_1
30
P8_6
31
P8_5
32
P8_4
33
P8_3
34
P8_2
35
P8_1
36
P8_0
37
P6_7
38
P6_6/TXD2
39
P6_5/CLK2
40
P4_5
41
P1_7
42
P1_6
43
P1_5
44
P1_4
45
P1_3
46
P1_2
47
P1_1
48
P1_0
49
P0_7/DA1
50
P0_6/DA0
51
P0_5
52
T_CONT1
53
P0_3
54
P0_2
55
P0_1
56
P0_0
57
P6_4
58
P6_3
59
P6_2
60
P6_1
61
P6_0
62
P5_7
63
P5_6
64
P3_2
1
P3_0
2
P4_2/VREF
3
MODE
4
HS_MUTE
5
P4_4/XCOUT
6
*RESET
7
P4_7/XOUT
8
VSS/AVSS
9
P4_6/XIN
10
VCC/AVCC
11
P5_4
12
P5_3
13
P5_2
14
P5_1
15
P5_0
16
P3_7
AG
AG
AG
AG
AG
R104
NC
DG
D3.3V
D3.3V
D3.3V
A5V
DG
D3.3V
DG
DG
D3.3V
+6V
D5V
D3.3V
DG
DG
D3.3V
DG
D5V
DG
DG
A5V
C5
NC
C13
NC
AG
AG
AG
C10
NC
AG
+6V
AG
AG
AG
AG
AG
C207
NC
AG
C82
NC
AG
D3.3V
DG
D3.3V
R154
NC
R155
NC
DG DG
AG
AG
R124
0
A5V
AG
DG
R8
33
DG
AG
AG
DG
DG2
D3.3V
DG
+6V
D5V
V1
H
T
R
L
T
R
L
B8
AG
SW42
HOLD
SW52
HOOK
J4
J1
AG
AG
JK1
1
2
3
4
5
T1
1
6
3
4
2
IC10
1 AOUT
2 A-IN
3 A+IN
4 GND
2 A-IN
3 A+IN
4 GND
5
B+IN
6
B-IN
7
BOUT
8
V+
IC6
1 AOUT
2 A-IN
3 A+IN
4 GND
2 A-IN
3 A+IN
4 GND
5
B+IN
6
B-IN
7
BOUT
8
V+
IC9
1
NC
2
A
4
Y
5
VCC
3
GND
R300
NC
D3.3V
R301
NC
R302
NC
R303
NC
IC11
1 CE
2 GND
3
VOUT
4
VDD
C205
220u
10
R17
0
C102
NC
Q5
Q3
Q4
Q102
Q20
DG
Q110
NC
C9
220u
10
C206
220u
10
C94
1000p
R94
4.7k
R100
68k
C104
0.01u
C108
0.1u
C110
0.1u
C117
0.01u
C132
1u
C2
10u
16
C204
0.1u
C210
0.01u
C3
22u
16
16
C36
0.1u
C4
2.2u
C85 0.01u
C92
1u
C95
0.1u
C96
0.01u
D1
4
1
3
2
D2
4
1
3
2
PC1
1
2
3
4
Q1
Q2
R3
2.2k
C203
47u
25
D40
(
)
PSUP01
PSUP1382ZD
PCB
8
KX-T7730RU
MEMO
9
KX-T7730RU
1.4.
PRINTED CIRCUIT BOARD (MAIN BOARD)
1.4.1.
COMPONENT VIEW
Change from the Original Service Manual Section 16.1.
KX-T7730RU MAIN BOARD (COMPONENT VIEW)
1
2
1 3
1 4
1
4
4 9
3 2
1
6 4
1 6
1 7
3 3
4 8
1
1 4
2 8
1 5
7
1
8
1 4
1
5
1
4
1
2
3
4
5
5
1
4
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
C35
D3.3V
C36
C41
C42
C43
C44
R230
C45
R231
C46
R232
C47
R233
C48
R234
C49
R235
R236
R237
R238
C50
C51
C52
C53
C203
C54
R240
C204
C55
C205
C56
C206
C57
C207
C58
C208
C59
C209
C60
C210
C61
C211
C62
C212
C63
C213
C64
C214
Q10
C65
C215
Q11
C66
Q12
C67
Q13
SP+
C68
H
Q14
Q15
Q16
L
Q18
SP1
SP2
R
RA2
T
Q20
A1
A2
A3
A4
A5
DG2
A6
A7
A8
C81
A9
C82
C84
C85
PC1
C86
B1
B2
SPN
B3
B4
B5
B6
AG
B7
B8
C91
C92
C93
C94
C95
C96
C2
C3
C4
R289
C5
C6
C7
C8
C9
D1
Q101
R296
D2
Q102
D3
D4
D5
Q105
Q106
D7
Q107
Q108
Q109
E1
E2
E3
E4
E5
E6
DG
G1
G2
JK1
JK2
JK3
R100
R101
R102
R103
R104
R105 R106
R107
D10
R108
K1
K2
R121
R123
R124
R125
R126
R127
D30
R128
D31
R129
D32
D33
D34
R131
M1
R132
M2
R133
M3
R134
R135
R136
R137
R138
R139
C101
C103
R140
C104
N1
C106
N2
C107
N3
C108
N4
N5
N6
N7
N8
C110
IC1
IC2
C112
IC3
C113
C114
IC5
C115
IC6
C116
R153
IC7
C117
R154
IC8
R155
IC9
R156
R10
AG1
AG2
R12
R13
R14
R15
R16
R19
C130
R20
C131
R21
D5V
C132
R22
C133
R23
R24
R25
Q1
R26
Q2
R27
Q3
R28
Q4
R29
Q5
Q6
Q8
Q9
R30
R31
R32
R34
R1
R36
R2
R37
R3
R38
R4
R39
R5
R6
R7
R8
R9
R40
R41
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R52
R54
R55
T1
R56
T2
R57
R58
R59
R60
R67
R68
R69
R70
R71
R72
R73
R74
R75
V1
R76
R77
R78
R79
R80
R81
R82
R84
R85
R86
R87
R88
R89
CN1
R91
R92
R93
R94
R95
X1
CN9
R96
+6V
R97
R98
R99
C10
C12
C13
C14
R201
IC10
IC11
R206
R208
CN4
X
A
E
C
B
M
CN
CE
NZ
AL
SP
RU
PSUP1382ZD-A
PbF
PSUP1382ZD-C
PbF
R
W
CN5
REF2
50
30
20
W
R
CN2
PSUP1382ZD-B
PbF
CN3
CN7
W
R
W
R
5
1
10
6
1
4
8
5
7
1
C74
C76
C75
R63
C73
R207
R65
IC4
C72
R64
R62
C71
R66
8
5
4
1
Q21
Q22
Q110
Q111
Q112
Q113
Q114
J2
J3
R300
R301
R302
R303
C102
R17
R61
MP
MP
MP
D40
D6
D9
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