KX-NT136RU - Panasonic PBX Service Manual (repair manual). Page 15

PCM TX DATA

HANDSET RX

PCM RX DATA

HANDSET TX
HEADSET RX
HEADSET TX
SP PHONE RX
SP PHONE TX

5

IC7 

(CODEC)

IC1

(MAIN-CPU)

nCO_RST

CO_PDN

CO_SYNC

CO_CLK

CO_DO

CO_DI

4

3

2

1

JK1

X2

32.768MHz

IC8

MIC-

SP+

SP-

MIC+

L9

L2

L3

C95

C92

C87

++

-

R66

C85

C63

R42

R43

C60

C400

3

2

1

To HANDSET

1

2

3

4

CN3

IC8

HDSP

GND

HDMIC

GND

L4

C88

C90

L5

+ +

-

C86

C68

R50

R51

C72

C401

NC

38

6

7

To HEADSET

+

C93

R69

C52

R68 C94

2

C416

+

C69

R52

C53

R53 C73

1

C419

C58

R39

R38

6

7

IC10

IC9

7

6
5

R56

C76

R57

R70

L400

+

C64

R44

C55

R45 C61

40

C418

3

2

1

IC9

C402

R58

C77

R59

1

2

CN4

MIC

GND

To MIC

1

2

CN5

SP+

SP-

To SP

SP-PHONE

+

C66

R46

C57

R47 C67

34

3

2

1

IC10

28

C89

J1

J2

B19
D19

C18
D18

E17

C19

KGPI04

J3

R60

C78

R61

22

23

9

19

20

18

17

-

-

-

-

KGP102

KGP103

BFSR0

BFSX0

BCLKR0

BCLKX0

BDX0

BDR0

HDOM

HSOM

HDIP

HDIM

HSIM

MICIM

SPDM

TP284

C59

R40

TP276

IC11

1SHUT

2BYPASS

3IN+

4IN-

5

VO-

6

VCC

7

GND

8

VO+

NC

C65

R48

R41

C62

TP279

AG_C

C172

L26

D3.3V

TP873

NC

C171

TP277

C408

AG_C AG_C

C411

C410

C170

C412

C409

C413

C414

AG_C

NC

C420

The SUB-CPU (IC13) controls KEY and LED.
A reset signal from the MAIN-CPU (IC1) starts either reset or normal operating.(L: RESET)
The SUB-CPU and the MAIN-CPU are connected by a serial communication.(asynchronous 19200bps 8 bits non-parity)

15