Panasonic KX-T7730RU (serv.man4) Service Manual / Supplement ▷ View online
17
KX-T7730RU
1.6.3.
TONE DIAL TORUBLE
Change from the Original Service Manual Section 8.4.
1.6.4.
THE ELECTRONIC VOLUME OF THE SPEAKER-PHONE DOES NOT WORK
Change from the Original Service Manual Section 8.5.
1.6.5.
THE ELECTRONIC VOLUME OF HANDSET DOES NOT WORK
Change from the Original Service Manual Section 8.6.
18
KX-T7730RU
1.7.
SCHEMATIC DIAGRAM
Change from the Original Service Manual Section 15.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(32)
(33)
(33)
KX-T7730RU MAIN BOARD (1/2)
2.4V
2.8V
1.5V
2.7V
1.5V
2.7V
2.8V
5.4V
5.3V
2.0V
2.0V
0
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
2.1V
0
0
0
2.8V
6.1V
2.9V
2.8V
4.6V
SP-Phone
Recepton Signal
SP-Phone
Recepton Signal
Recepton Signal
Ringer
Signal
Signal
5.4V :
0V :
The handset is in use
The speakerphone is in use
The speakerphone is in use
On using the speakerphone
L[3]
L[2]
L[1]
L[0]
HS_POWER
K[3]
T_CONT2
K[2]
HS_VOL1
K[6]
HS_VOL2
SP_VOL4
SP_VOL3
K[1]
T_CONT3
SP_RX_MUTE
C[5]
HEAD_SET
SP_TX_MUTE
L[7]
K[4]
L[6]
L[5]
K[0]
L[4]
C[4]
HS_MUTE
SP_RX_MUTE
SP_TX_MUTE
HS_POWER
SP_POWER
DOUT
HS_VOL1
HS_VOL2
K[5]
T_CONT4
C[3]
C[2]
C[1]
C[0]
RING_OFF
SP_POWER
C57
10V1000
C65
0.01
C51 2.2
DG
D33
AG
AG
AG
DG
Q108
1
2
3
4
5
AG
D34
C50 2.2
AG
+6V
C213 1000P
C60 0.022
AG
C52 10
C48
0.1
Q105
1
2
3
4
5
AG
AG
Q14
E
C
B
AG
Q8
E
C
B
C47 0.033
C27
0.1
AG
C59
0.1
IC5
11
10
12
C84
0.01
0.01
Q106
1
2
3
4
5
C66
0.01
Q13
E
C
B
C30
6.3V220
C64 0.1
AG
AG
AG
AG
AG
IC5
2
1
13
C62
0.047
AG
C46
0.047
AG
C28
2200P
C67
0.01
0.01
C44 0.047
C56
10V220
AG
C58
4.7
AG
D31
AG
C209
2200P
Q107
1
2
3
4
5
C45 0.047
C29
0.01
D32
A5V
IC5
3
4
5
C211
0.01
C42
0.1
C49
0.033
C61 0.1
IC3
1
RR
2
RTX
3
TXI
4
TXO
5
TLI
6
TLO
7
RLI
8
RLO
9
MCI
10
MCO
11
CP1
12
CP2
13
XDI
14
SKG
15
SKO
16
V+
17
AGC
18
CS
19
SKI
20
VCC
21
VB
22
GND
23
XDC
24
VLC
25
ACF
26
RXO
27
RXI
28
RRX
Q15
1
2
3
4
5
Q16
1
2
3
4
5
Q12
1
2
3
4
5
Q11
1
2
3
4
5
X1
20MHz
1
2
3
DG
C106
0.01
D3.3V
D3.3V
C107
0.1
D3.3V
D3.3V
AG
D9
6.2V
AG
D3.3V
IC2
1
Vout
2
Vin
3
NC
4
Vss
DG
CN9
NC
1
VCC
2
MODE
3
RESET
4
VSS
D3.3V
DG
C108
0.1
DG
D3.3V
R144
470
R30
100K
R69
56K
R139
10
R86
220K
R44
4.7K
R80
33K
33K
R43
470K
R55
150K
R52
100K
R71
33K
R67
220K
R70
27K
R48
2.2M
R58
100K
R49 30K
R47
5.6K
R60
1.5K
R36
150
R50 68K
R54
18K
R206
1K
R90
470
470
R84
330K
R87
6.8K
R31
1K
R57
2.2K
R78
47K
47K
R59
12K
12K
R89
68K
R88
2.7K
R79
39K
39K
R129
10K
R37
18K
R72
33K
R61
0
R73
100K
R29
470K
R68
120K
R140
15
R45
3.3K
R208
22K
R46
5.6K
R56
3.3
R42
18K
R38
6.8K
R51 2.7M
IC8
2
1
4
SW21
8
SW46
6
SW27
9
SW15
7
SW39
0
SW40
5
SW16
1
SW43
SP-PHONE
SW22
2
SW34
4
SW45
#
SW41
REDIAL
SW28
3
SW33
*
SW42
HOLD
SW25
CO2
SW12
CO11
SW35
M.W
SW38
TRANSFER
SW51
PROGRA M
SW17
CO8
SW30
FWD/DND
SW37
FLASH
SW19
CO6
SW13
CO10
SW20
CO5
SW24
CO3
SW29
CONF
SW18
CO7
SW36
PAUSE
SW26
CO1
SW44
ICM
SW11
CO12
SW32
STORE
SW31
MUTE
SW23
CO4
SW14
CO9
SW48
SW47
SW49
SW50
Q7
1
6
2
Q7 4
3
5
CN7
NC
1
2
3
4
5
CN7
6
7
1
CN8
2
5
R63
NC
R65
NC
R207
NC
C71
NC
NC
C72
C73
NC
C75
NC
C76
NC
C74
NC
R66
NC
R85
NC
C214 NC
J3
NC
J2
NC
D29
CO12
D28
CO11
D27
CO10
D26
CO9
D23
CO6
D25
CO8
D24
CO7
D22
CO5
D18
CO1
D19
CO2
D20
CO3
D21
CO4
D14
CONF
D15
FWD/DND
D17
STORE
D16
MUTE
D11
M.W
D13
SP-PHONE
D12
ICM
RA2
1.2K
1
2
3
4
5
6
7
8
Q18
Q103
1
6
2
Q103
4
3
5
Q104
1
6
2
Q104
4
3
5
C43
NC
CN4
NC
1
2
CN5
NC
1
2
CN2
NC
1
2
CN3
NC
1
2
IC4
1
CD
2
FC2
3
FC1
4
Vin
5
VO1
6
VCC
7
GND
8
VO2
JK2
1
1
2
2
3
3
4
4
B4
B3
E4
A5
A1
A3
E5
E3
G2
A4
A7
N1
A6
A9
A8
E6
N3
B1
K1
SPN
N2
B2
B7
SP+
B6
E1
G1
N4
B5
E2
A2
SW1
1
2
3
4
AG
R121
NC
AG1
SP2
M2
D3.3V
C68
NC
M3
AG2
R153
NC
AG
AG
+6V
AG
AG
R62
NC
R64
NC
K2
R131
220
R132
56
R133
220
R135
220
R136
56
R137
220
R138
100
R134
56
R75
68K
68K
D3.3V
AG
SP1
M1
C55
10
6
N5
N6
N7
NC
3
AG
4
CN8
7
N8
JK3
1
2
3
4
5
C31 10
C54
6.3V100
C53
6.3V47
C63
6.3V100
R
G
R
G
R
G
R
G
G
G
GG
R
G
R
G
R
R
G
G
R
RR
R
19
KX-T7730RU
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(32)
KX-T7730RU MAIN BOARD (2/2)
(33)
1.7V
1.5V
1.6V
0
0
0
0
0
0
0
5.4V
5.4V
5.4V
5.2V
5.4V
5.2V
5.4V
0.8V
5.4V
5.4V
5.4V
5.4V
5.4V
0
0
0
0
0
0
5.4V
0
0
0
0
0
0
5.4V
5.4V
5.4V
5.4V
5.4V
5.4V
5.4V
13.5V
1.8V
0
0
1.2V
2.0V
1.6V
1.9V
1.9V
5.4V
0
0
5.2V
0
4.0MHz
5.4V
5.4V
0
0
0
5.1V
0
5.4V
5.4V
6.1V
20V
Handset
Recepton Signal
Recepton Signal
Handset
Transmission
Signal
Transmission
Signal
DTMF
Signal
for Dial
Signal
for Dial
1.8V
HS_MUTE
DI_INT
T_CONT1
K[0]
K[1]
K[2]
K[3]
K[4]
K[5]
K[6]
C[0]
C[1]
C[2]
C[3]
C[5]
RING_OFF
HEAD_SET
L[7]
L[6]
L[5]
L[4]
L[3]
L[2]
L[1]
L[0]
T_CONT1
T_CONT2
T_CONT3
T_CONT4
HS_VOL1
HS_VOL2
SP_VOL3
SP_VOL4
C[4]
K[7]
DI_INT
DOUT
C7
820P
D5
C8
0.22
C14
0.047
Q102
E
C
B
AG
J1
C96
0.01
C34
0.1
C212
1000P
C101
50V 0.01
Q2
C23
0.015
C4
2.2
D5V
AG
C91
0.1
D4
+6V
AG
Q5
E
C
B
AG
C95
0.1
C92
1
A5V
C204
0.1
AG
Q1
C24
0.1
AG
AG
DG
IC5
8
9
6
AG
DG
AG
IC6
3
2
1
AG
C85
0.01
0.01
C94
1200P
C6
1000P
C9
10V220
AG
C81
0.1
C93
0.047
AG
Q10
E
C
B
DG
J4
JK1
1
H
2
T
3
R
4
L
D5V
C103
2.2
C208
1000P
C21
0.1
C110
0.1
DG
C12
0.015
A5V
Q6
E
C
B
IC6
5
6
7
Q4
+6V
AG
A5V
AG
D3
DG
C22
0.01
AG
Q3
E
C
B
D3.3V
D3.3V
D3.3V
D7
Q101
E
C
B
D3.3V
D3.3V
DG
DG
D3.3V
DG
D10
DG
C116
2.2
D3.3V
C113
2.2
C114
2.2
C115
2.2
C112
2.2
Q9
E
C
B
C132
1
AG
AG
AG
AG
AG
C26
0.1
IC10
3
2
1
AG
C33
0.015
AG
IC10
5
6
7
AG
C35
1
C131
0.1
C32
0.1
DG
R289
100K
100K
R27
5.6K
R91
10K
R103
2.7K
R98
15K
R28
3.3K
R108
1K
R106
1K
R5
47
R2
22K
R39
33K
R128
2.7K
R102
220
R82
1.5K
R15
6.8K
R81
10K
10K
R99
10K
R96
100K
R125
470K
R8
33
R94
5.6K
R105
68
R233
39K
R101
220
R124
0
R127
33K
R41
4.7K
R237
470
R14
18
R21
2.7K
R22
3.3K
3.3K
R3
4.7K
R16
56
R1
100K
R107
4.7K
R26
4.7K
R97
10K
R231
10K
R234
30K
R17
0
R34
3.3K
R25
470K
R32
39K
39K
R10
2.7K
R7
27K
R238
270K
R92
18K
R74
5.6K
R77
8.2K
R126
15K
R100
68K
R40
33K
R236
5.1K
R95
470K
R4
68K
R6
680
R76
120K
R9 20K
R24
270K
R201
2.2K
R93
10K
10K
R23
120
R123
2.2k
AG
D3.3V
C86
0.01
0.01
C117
0.01
D3.3V
R156
15K
C207
NC
R19
NC
R20
NC
R154
NC
R155
NC
D6
IC11
1
VIN
2
VSS
3
CE
4
NC
5
VOUT
IC10
8
4
IC5
14
7
IC8
5
3
Q20
T2
1
2
4
5
6
7
9
10
IC7
1
VCC
2
GND
3 OUT
IC6
8
4
C13
NC
PC1
1
2
3
4
T1 6
1
2
3
2
3
4
R
AG
L
H
V1
DG
D1
1
2
3
4
D2
1
2
3
4
C36
0.1
C5
NC
T
SW52
HOOK
AG
B8
C82
NC
AG
IC9
2
4
DG
D3.3V
IC9
5
3
1
Q109
1
2
3
4
5
DG
C41
0.1
1 Vss
2 ResetB
3 V0
4 V1
5 V2
6 V3
7 V4
8 Vss
9 Vdd
CN1
10 DB6(SIC)
11 DB7(SI)
12 CSB
13 RS
14 Vss
R104
NC
C205
10V1000
C206
10V220
C215
6.3V220
C10
NC
AG
+6V
D5V
D3.3V
C210
0.01
DG2
R12
2.2K
R13
470K
R240
1K
R232
27K
R235 NC
C133 NC
R230 33K
C130 330P
D30
C104
0.01
C102
NC
IC1
1 P3_0
2 P4_2/VREF
3 MODE
4 P4_3/XCIN
5 P4_4/XCOUT
6 RESET
7 P4_7/XOUT
8 VSS/AVSS8
9 P4_6/XIN
2 P4_2/VREF
3 MODE
4 P4_3/XCIN
5 P4_4/XCOUT
6 RESET
7 P4_7/XOUT
8 VSS/AVSS8
9 P4_6/XIN
10 VCC/AVCC10
11 P5_4
12 P5_3
13 P5_2
14 P5_1
15 P5_0
16
P3_7
17
P3_5
18
P3_4
19
P3_3/INT3
20
P2_7
21
P2_6
22
P2_6
23
P2_6
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_6
36
P8_6
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
P0_4
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
C25
10
C2
16V10
C3
16V22
C203
25V47
20
KX-T7730RU
MEMO
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