KX-NS500RU (serv.man2) - Panasonic PBX Service Manual (repair manual). Page 10

10

Fig.3 shows detail block diagram of Mother Board, and each function of Base is described in Table.5.

Refer to Service Manual of KX-NS5173/KX-NS5174.

Refer to Service Manual of KX-NS5180.

Refer to Service Manual of KX-NS5170/KX-NS5171/KX-NS5172.

Device/Function Block

Description

PLD1(EXT_PLD)

PLD1 controls and monitors SLIC/CODEC LSI of each analog line port.

PLD2(CO_PLD)

PLD2 controls the trunk controller DSP which is used in each analog trunk port.

SLIC/CODEC

SLIC/CODEC is exclusive LSI which is used for analog line interface.
  1) Line interface power supply
  2) Dial pulse detection
  3) DTMF receiver / Caller ID generation
  4) Bell signal generation
  5) Hooking detection / Ringtrip detection
  6) 2W/4W conversion
  7) CODEC function

DSP(CO)

DSP(CO) is exclusive LSI which is used analog trunk port.
  1) Dial pulse generation
  2) DTMF signal generation / Caller ID detection
  3) Bell signal detection
  4) CPC signal detection
  5) 2W/4W conversion
  6) CODEC function

DPT I/F

DPT I/F is Digital Line Interface.

6

Trunk option

Connector

Extension option

Connector

80

P

IN
C

O

N

NE
C

T

O

R

(C

PU

In

te

rfa

ce)

RJ45
MOH

PAG

RJ45

RJ45

POWER I/F

Connector

Exp

ansi

on

 bu

s

SLIC/CODEC bus (SPI)

TDM Highway bus

AFE

DSP

(2ch)

AFE

AFE

SLIC/CODEC(2ch)

AFE

AFE

AFE

AFE

AFE

AFE

AFE

SLIC/CODEC(2ch)

SLIC/CODEC(2ch)

SLIC/CODEC(2ch)

SLIC/CODEC(2ch)

SLIC/CODEC(2ch)

SLIC/CODEC(2ch)

SLIC/CODEC(2ch)

DPT

I/F

(2ch)

DSP

(2ch)

ACALM, DCALM

+40V, GND

+15V, GND

Dial Pulse, CPC DET

Dial Pulse, CPC DET

RJ45

RJ45

RJ45

IIO bus

PLD1

( EXT_PLD)

DSP

(2ch)

AFE

Dial Pulse, CPC DET

DPT- I/F

FAN I/F

Connector

VBAT

+15V, GND

PLD2

(CO_PLD)

INT(2)

DC/DC

+3.3V, GND

15

12V

INT_SLIC

INT_DSP

INT

INT_EXT
INT_CO

FAN_ALM

RJ45
MOH

PAG

RJ45
MOH

PAG

CO1-CO2

CO2-CO3

CO4-CO5

Re
la

y

RJ45

SLT2
SLT1

Fig.3 Main Unit Mother Board Block Diagram