Read Panasonic KX-T7730RU Service Manual Supplement 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
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