Schematic Diagram - Panasonic KX-T7730CA Service Manual

KX-T7730CA

10 Schematic Diagram

On using the speakerphone
M3
CN2
2.4V C64
+
1
0.1
2
- C65
AG2
0.01
R60
1.5K
AG
SP- SP+
CN3
+
1
2
-
R61
0
AG
Q15
R67 220K
5
1
2
3
R68 120K
4
5 R69 56K
1
2
3 R70 27K
4
Q16
AG
N4 N2 N1
N3
SW1
CN8
4
2
3 R90
2
1
1
470
3
AG
D5V
R131
L[0]
CO12
4
3 270
1
2
2
L[1] R
R132
1
5 G
39 3 4
Q105
R133 D29
L[2]
CO8
4
3 270
2
L[3] R
R134
1
5 G
39
Q106
R135 D25
L[4]
CO4
4
3 270
2 R
L[5]
R136
1
5 G
39
Q107
R137
D21
L[6]
4 CONF
270
3
2 D14
L[7]
R138
1
5
220
Q108
R139
CN4 39
CN5
R140
1 2
M.W
56
2 1
D11
CN6
R141
1
NC
2
E1
6
1
DG
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R206
1K TP102 C59
TP220 0.1
Q14
C
R58
C60 R54
100K
B
R72
E
18K
0.022
47K
TP100
AG AG
C58
R57 2.2K
Z4.7
R55
C62
R59
150K
0.047
12K
C210
C61
NC
+6V
0.1
R80
47K
R56
3.3
C67
R78
3300P
C63
47K
6.3V100
C66
R79
0.01
39K
AG
C57
6.3V1000
R66
C72 NC
NC
R64 NC
IC4 NC
5
4
VO1 Vin
6 3
VCC FC1
R207
7
2
GND FC2
NC
8 1
VO2 CD
R65
NC
C74
NC
NC R63
NC
C75
C76
NC
Ringer
Signal
AG
R86
R85
NC 270K
IC5
2
11
AG
13 12
IC5
1
10
A5V
R89
R88
R87
100K
3.9K
10K
K2 K1
CN7
8
Q18
9
7
AG
AG
SW11
A1 B1
CO12
CO11 CO10 CO9
SW17
A2 B2
R R R
CO8
G G G
SW23
A3 B3
D28 D27 D26
CO4
CO7 CO6 CO5
SW29
A4 B4
R R R
CONF
G G G
SW35
A5 B5
D24 D23 D22
M. W
CO3 CO2 CO1
SW41
A6 B6
R R R
REDIAL
G G G
SW47
A7 B7
D31
D20 D19 D18
FWD/DND MUTE STORE
A8 B8
D15 D16 D17
SP-PHONE
A9
D13
ICM
D12
E4
RA2
E3
Q103
3 4.7K
E2
Q103
6
5
4
Q104
3
2
1
Q104
5
4
2
C46
0.047
R48 2.2M
IC3
2.8V
2.1V R49 30K
28
C47
1
RRX RR
0.033
1.5V 2.1V R50 68K
27
2
RXI RTX
TP75
2.7V 1.5V
26
3
RXO TXI
C55 2.2V C48 0.1
5.3V
25
4
ACF TXO
2.8V R46 TP73
2.0V Z10
24
5
VLC TLI
C50
G2 2.8V
23 5.6K
6
XDC TLO
TP83
2.8V
0 Z2.2
22
7
GND RLI
R51 2.7M
2.8V 2.7V
TP95 R47
21
8
VB RLO
5.6K
G1 C51
5.4V 2.8V
20
9
Vcc MCI
2.9V
0 Z2.2
19 10
SKI MCO
2.5V
0
18 11
CS CP1
C52
2.8V
R53 2.7V
17 12
AGC CP2
R44
47K
6.1V 2.8V Z10
16 13
V+ XDI
2.9V 0
15 14 4.7K
SKO SKG
R52100K
C53 6.3V47
C56
C54
6.3V220
6.3V100
AG
R62 C71
NC
NC
C73
NC
C30
6.3V220
AG
2.8V
SP1 SP2
M1 M2
CN8
CN7
N5
5
8 2
N6
4 J2 NC
7 3
N7
3 J3 NC
5 5
N8
2
4 6
1 AG 1
9 1
6 4
JK3
AG
AG
JK2
SP
3
MIC
1
C211
2
0.01
4
AG
HANDSET JACK
AG
SW12 SW13 SW14 SW15 SW16
CO11 CO10 CO9 7 1
SW18 SW19 SW20 SW21 SW22
CO7 CO6 CO5 8 2
SW24 SW25 SW26 SW27 SW28
CO3 CO2 CO1 9 3
SW30 SW31 SW32 SW33 SW34
FWD/DND MUTE STORE * 4
SW36 SW37 SW38 SW39 SW40
PAUSE FLASH 0 5
TRANSFER
SW43 SW44 SW45 SW46
SP-PHONE IC M # 6
SW48 SW49 SW50 SW51
D32 D33 D34
PROGRAM
SW52
HOOK
AG
E5
E6
24
SP-Phone
Reception Signal
TP89
R45
Q13
C
3.3K B
C43
R43
R71
E
470K
47K
C44
0.047
AG AG AG
C45
0.047
SP-Phone
Transmission Signal
C49
0.033
A5V
Q7
R36
150
4.6V
R30
C28
100K
2200P
3300P
C R208 C27
C209
B
AG 0.1
Q8 22K
E
R84
C31 C29
680K
Z10 2200P R29
470K
R31
C84
1K
0.01
C214
NC
Q12 A5V
R38 R37
5
1
10K
27K
R73
2
4 5
100K IC5
4
3
4
5
Q11
3
3 2 1
C213
1000P
AG
K[0]
K[1]
K[2]
K[3]
K[4]
K[5]
K[6]
HS_MUTE
SP_RX_MUTE
K[7]
SP_TX_MUTE
HS_POWER
SP_POWER
The handset is in use
5.4V :
The speakerphone is in use
0V :
KX-T7730CA MAIN BOARD NO.1
C42
R42
(20)
0.1
18K
NC
(19)
(18)
(17)
(16)
(15)
(14)
(13)
(12)
(11)
(10)
(9)
(8)
(7)
(6)
(5)
(4)
(3)
(2)
(1)