Panasonic KX-T7730CA, Service Manual

24

KX-T7730CA

10 Schematic Diagram

(1)

(2)

(3)

(4)

(6)

(8)

(9)

(10)

(11)

(12)

(14)

(16)

(17)

(18)

(19)

(20)

(13)

(15)

(5)

(7)

KX-T7730CA  MAIN BOARD NO.1

R31

1K

R49 30K

R50 68K

R48 2.2M

R46

5.6K

R47

5.6K

R51 2.7M

C44

0.047

C45

0.047

C61

0.1

R56

3.3

+6V

R54

18K

R55

150K

R57 2.2K

C46

0.047

R42

18K

C42

0.1

R58

100K

C65
0.01

C59

0.1

C64

0.1

C58

Z4.7

C55

Z10

C51
Z2.2

C50

Z2.2

C27

0.1

R61

0

C62

0.047

R29

470K

R70 27K

R67 220K

R68 120K

AG

Q15

1

4

3

2

5

Q16

1

4

3

2

5 R69 56K

C48 0.1

C47

0.033

R45

3.3K

R52100K

R36

150

A5V

R38

10K

Q11

1

4

3 2

5

R134

39

D22

CO5

D26

CO9

D28

CO11

R131

270

D27

CO10

R132

39

R133

270

D23

CO6

D24

CO7

R135

270

R136

39

D20

CO3

D18

CO1

D19

CO2

D5V

SW26

CO1

SW46

6

SW40

5

SW22

2

SW34

4

SW23

CO4

SW12

CO11

SW14

CO9

SW33

*

SW27

9

SW25

CO2

SW15

7

SW28

3

SW21

8

SW18

CO7

SW11

CO12

SW17

CO8

SW45

#

SW24

CO3

SW20

CO5

SW19

CO6

SW39

0

SW16

1

D29

CO12

3

4

1

2

D25

CO8

D21

CO4

R138

220

R137

270

RA2
4.7K

NC

C72

IC4 NC

1

CD

2

FC2

3

FC1

4

Vin

5

VO1

6

VCC

7

GND

8

VO2

NC

R62

NC

R65

NC

C71

NC

R64

R43

470K

NC

C73

IC5

11

10

12

IC5

2

1

13

NC

C74

NC

C75

NC

R66

R60

1.5K

R59

12K

R30

100K

C28

3300P

R37

27K

R53
47K

NC R63

C31

Z10

CN2

1

+

2

-

CN3

1

+

2

-

R72

47K

R71

47K

D12

ICM

R139

39

NC

C43

DG

AG

AG

AG

AG

AG

AG

AG

AG AG AG

AG

NC

J2

NC

J3

IC5

3

4

5

AG

AG

D16

MUTE

D17

STORE

D14

CONF

D15

FWD/DND

D13

SP-PHONE

SW31

MUTE

SW30

FWD/DND

SW35

M.W

SW32

STORE

SW29

CONF

SW37

FLASH

SW36

PAUSE

SW47

SW48

SW44

ICM

SW41

REDIAL

SW38

TRANSFER

SW43

SP-PHONE

SW49

SW50

JK2

HANDSET JACK

3

SP

1

MIC

2
4

A1

A2

A3

A4

A5

A6

A7

A8

A9

B1

B2

B3

B4

B5

B6

B7

B8

E4

E3

E2

E1

E5

E6

G2

G1

AG

1

M3

AG2

SP- SP+

SW51

PROGRAM

SW1

3

4
2
1

SW13

CO10

CN6

1
2

R141

NC

CN4

1

2

CN5

1
2

R140

56

D11

M.W

AG

A5V

Q7

Q18

Q104

1

6

2

Q104

4

3

5

Q103

1

6

2

Q103

4

3

5

C84

0.01

R84

680K

R44

4.7K

C49

0.033

AG

R89

100K

Q12

1

4

3

2

5

A5V

R73

100K

SW52

HOOK

CN8

8
7
5
4
9
6

CN7

2
3
5
6
1
4

CN8

2
1
3

CN7

8
9
7

AG

AG

K2 K1

M1

SP1

M2

SP2

N3

N2

N4

N1

AG

NC

C76

R90

470

D31

D32

D33

D34

R206

1K

NC

R207

C29

2200P

R208

22K

R78

47K

R79

39K

AG

R86

270K

NC

R85

R88

3.9K

R87

10K

C66

0.01

C67
3300P

R80

47K

N5
N6
N7
N8

AG

AG

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

C60

0.022

NC

C210

Q105

1

2

3

4

5

Q106

1

2

3

4

5

Q107

1

2

3

4

5

Q108

1

2

3

4

5

Q14

E

C

B

Q13

E

C

B

Q8

E

C

B

TP220

TP102

TP100

TP95

TP75

TP73

TP83

TP89

AG

C209

2200P

C211

0.01

C213

1000P

C214

NC

JK3

1

5
4
3
2

C30

6.3V220

C63

6.3V100

C57

6.3V1000

C54
6.3V100

C53 6.3V47

C56

6.3V220

C52

Z10

SP_RX_MUTE
SP_TX_MUTE

HS_POWER
SP_POWER

SP_VOL1

SP_VOL2

SP_VOL3

SP_VOL4

HS_VOL2

HS_VOL1

C[1]

C[0]

C[3]

C[2]

T_CONT3

T_CONT4

L[0]

L[1]

L[2]

L[3]

L[4]

L[5]

L[6]

L[7]

SP_POWER

SP_TX_MUTE

SP_RX_MUTE

T_CONT2

HS_POWER

K[0]

K[1]

K[2]

K[3]

K[4]

K[5]

C[4]

C[5]

K[7]

K[6]

HS_MUTE

RING_OFF

HEAD_SET

R

R

R

G

R

G

R

G

R

G

G

G

R

R

R

G

G

G

R

G

R

G

G

R

2.4V

2.8V
1.5V
2.7V

2.8V

5.4V

5.3V
2.0V

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
Reception Signal

SP-Phone
Transmission Signal

Ringer
Signal

5.4V :

0V :

The handset is in use
The speakerphone is in use

On using the speakerphone