KX-NS500, KX-NS520, KX-NS500RU, KX-NS520RU - Panasonic PBX Service Manual Supplement (repair manual). Page 6

6

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

Device/Function Block

Description

ASIC2

ASIC2 controls SLIC/CODEC LSI of each analog line port and 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

8

0

P

IN
C

O

N

NE

C

T

O

R
(C

PU

In

te

rf

a

c

e

)

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

DSP

(2ch)

AFE

Dial Pulse, CPC DET

DPT- I/F

FAN I/F

Connector

VBAT

+15V, GND

INT(2)

DC/DC

+3.3 V, GND

15

12V

INT_SLIC

INT_DSP

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

ASIC2
Line
Controller