DOWNLOAD Panasonic KX-T7730RU (serv.man4) Service Manual ↓ Size: 912.7 KB | Pages: 22 in PDF or view online for FREE

7

Change from the Original Service Manual Section 5.

Pin No.

Terminal Name

I/O Function

I/OSetting

Description

1

P3_0

I/O

O

open

2

Vref

I

-

DTMF Standard Power

3

MODE

I

-

MODE

4

P4_3

I/O

O

HS_MUTE

5

P4_4

I/O

O

SP_RX_MUTE

6

/RESET

I

-

RESET OUT

7

XOUT

I/O

O

20MHz

8

VSS

I

-

GND

9

XIN

I/O

-

20MHz

10

VCC

I

-

Vcc_3.3V

11

P5_4

I/O

O

SP_TX_MUTE

12

P5_3

I/O

O

HF Relay

13

P5_2

I/O

O

HS-POWER

14

P5_1

I/O

O

SP-POWER 

15

P5_0

I/O

I

Hold Key

16

P3_7

I/O

O

D_OUT

17

P3_5

I/O

I

Model1

18

P3_4

I/O

I

Model2

19

P3_3

I/O

I

DI_INT

20

P2_7

I/O

I

KEY-IN0

21

P2_6

I/O

I

KEY-IN1

22

P2_5

I/O

I

KEY-IN2

23

P2_4

I/O

I

KEY-IN3

24

P2_3

I/O

I

KEY-IN4

25

P2_2

I/O

I

KEY-IN5

26

P2_1

I/O

I

KEY-IN6

27

P2_0

I/O

I

Hook-SW

28

P3_6

I/O

O

KEY/LED-COM0

29

P3_1

I/O

O

KEY/LED-COM1

30

P8_6

I/O

O

KEY/LED-COM2

31

P8_5

I/O

O

KEY/LED-COM3

32

P8_4

I/O

O

KEY-COM4/RS

33

P8_3

I/O

O

LCD_Contrast1

34

P8_2

I/O

O

LCD_Contrast0

35

P8_1

I/O

O

KEY-COM5

36

P8_0

I/O

I

Ring vol off

37

P6_7

I/O

O( I )

LCD_STB

38

P6_6

O

O

LCD_DO

39

P6_5

I/O

O

LCD_CLK

40

P4_5

I/O

O

LED0

41

P1_7

I/O

O

LED1

42

P1_6

I/O

O

LED2

43

P1_5

I/O

O

LED3

44

P1_4

I/O

O

LED4

45

P1_3

I/O

O

LED5

8

46

P1_2

I/O

O

LED6

47

P1_1

I/O

O

LED7

48

P1_0

I/O

O

RESET_OUT

49

P0_7

I/O

I

DTMF Column

50

P0_6

I/O

I

DTMF Row

51

P0_5

I/O

O

open

52

P0_4

I/O

O

Tone cont 1

53

P0_3

I/O

O

Tone cont 2

54

P0_2

I/O

O

Tone cont 3

55

P0_1

I/O

O

Tone cont 4

56

P0_0

I/O

O

HS/HF SP vol 1

57

P6_4

I/O

O

HS/HF SP vol 2

58

P6_3

I/O

O

HF SP vol 3

59

P6_2

I/O

O

HF SP vol 4

60

P6_1

I/O

O

open

61

P6_0

I/O

O

open

62

P5_7

I/O

O

open

63

P5_6

I/O

I

Head Set Detention

64

P3_2

I/O

I

TONE-DET

Pin No.

Terminal Name

I/O Function

I/OSetting

Description

9

Change from the Original Service Manual Section 6.

USD PRIVING

CIRCUIT

(Q105~108)

H

L

T

R

T2

POWER

REGULATOR

(IC7)

SIGNAL

TRANSMITTING

CIRCUIT(Q101)

SIGNAL

RECEIVING

CIRCUIT(Q102)

IC9

RESET IC

(IC2)

Vcc(5V)

POWER

REGULATOR

(IC11)

Vcc(3.3V)

CPU

(IC1)

X1

DRIVING

CIRCUIT

(Q103,Q104)

LED

LCD

KEY

LCD Module

RINGER

DTMF

SPEAKER

MIC

HEADSET

HANDSET

SP-PHONE

(IC3)

Handset Amp

(Q5,Q8)

Pre Amp

(Q4)

HYBRID

CIRCUIT

(Q3)

DIODE

BRIDGE

(D1)

DIODE

BRIDGE

(D2)

T1

KX-T7730R

U MAIN BO

ARD

10

Change from the Original Service Manual Section 7.1.
Sequential input information is executed by dynamic scanning.
The ports P3_1, P3_6, P8_4~6, P8_1 of IC1 are brought to hifh status consecutively.
If a key is pressed, the key-in information input is executed by ports P2_1~7, P6_1~2.