Read Panasonic KX-T7730RU (serv.man4) Service Manual Supplement online
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)
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(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
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