KX-NS520RU (serv.man2) - Panasonic PBX Service Manual (repair manual). Page 12

12

Fig.5 shows detail block diagram of Mother Board, and each function of Base is described in Table.7.

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

Device/Function Block

Description

PLD1(EXT_PLD)

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

SLIC/CODEC

SLIC/CODEC is exclusive LSI which is used for analog line interface.
    8) Line interface power supply
    9) Dial pulse detection
  10) DTMF receiver / Caller ID generation
  11) Bell signal generation
  12) Hooking detection / Ringtrip detection
  13) 2W/4W conversion
  14) CODEC function

Trunk option

Connector

Extension option

Connector

80PIN

CONN

ECT

OR

(CP
U
Int

e

rfa

ce)

RJ45

POWER I/F

Connector

Exp

a

nsi

on

 bu

s

SLIC/CODEC bus (SPI)

TDM Highway bus

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)

ACALM, DCALM

+40V, GND

+15V, GND

RJ45

RJ45

RJ45

PLD1

(EXT_PLD)

FAN I/F

Connector

+15V, GND

INT(2)

DC/DC

+3.3 V, GND

15

12V

INT_SLIC

INT_EXT

INT_CO

FAN_ALM

RJ45

PFT

RJ45

PFT

PFT1-PFT2

PFT2-PFT3

SLT4
SLT3

Re
la

y

To SLT3-SLT4
PFT Relay

RJ45

SLT2
SLT1

Fig.5 Expansion Unit Mother Board Block Diagram