DOWNLOAD Panasonic KX-NS500UC (serv.man2) Service Manual ↓ Size: 12.71 MB | Pages: 127 in PDF or view online for FREE

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In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains lead.
We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver,
(Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder. 

• PbF solder has a melting point that is 50

 ~ 70 F, (30 ~ 40C) higher than Pb solder. Please use a soldering iron with tempera-

ture control and adjust it to 700

 ± 20 F, (370 ± 10C). 

Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.

• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100

F, (600C).

• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the

opposite side (See figure, below).

There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other 
materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

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*1 Except the 19-inch rack mounting equipment

Main CPU

Cortex A8 600 MHz

Power Input

100 V AC to 130 V AC: 2.2 A/200 V AC to 240 V AC: 1.3 A;50 Hz/60 Hz

Power Consumption (when fully mounted)

110 W

External Backup Battery

External battery port is not supported.

Memory Backup Duration

7 years

Dialling  

Trunk

Dial Pulse (DP) 10 pps, 20 pps
Tone (DTMF) Dialling with Caller ID (FSK/DTMF)
1600 

  Maximum

Extension 

Dial Pulse (DP) 10 pps, 20 pps
Tone (DTMF) Dialling with Caller ID (FSK)
SLC1 and 2 port support PFT in combination with the LCOT1 and LCOT2 port connected to 
an analogue trunk respectively.

Mode Conversion 

DP-DTMF, DTMF-DP

Ring Frequency 

20 Hz/25 Hz (selectable)

Operating
Environment

Temperature

 0 

C to 40 C

Humidity

10%to 90% (non-condensing)

Conference Call Trunk 

From 10 x 3-party conference call to 4 x 8-party conference call

Music on Hold (MOH)

Maximum 8 ports (Level Control: 31.5 dB to +31.5 dB per 0.5 dB)
MOH: Selectable Internal/External Music Source port

External Paging

Maximum 6 Ports (Volume Control: -15.5 dB to per 0.5 dB)

LAN Port

1 (for LAN connection)

10BASE-T/100BASE-TX (Auto MDI/MDI-X)

Extension Connection Cable

SLT

1-pair wire (T, R)

DPT

1-pair wire (D1, D2) or
2-pair wire (T, R, D1, D2)

PT-interface CS

1-pair wire (D1, D2)

PT-interface CS (High-density) 

4-pair wire (D1, D2)

DSS Console and Add-on Key Module

1-pair wire (D1, D2)

Air-cooling method

FAN

Dimension

430 mm (W) x 88 mm (H) x 367 mm (D)

Weight (when fully mounted)

Under 4.5 kg 

*1

 

Terminal Equipment Loop Limit

• SLT: 600 

 including set

• Doorphone: 20 



Minimum Leakage Resistance

15 000 

 maximum

Maximum Number of Extension
Instruments per Line

1 for SLT

Ring Voltage

65 Vrms at 20 Hz/25 Hz depending on the Ringing Load

Trunk Loop Limit

1600 

 maximum

Hookswitch Flash/Recall Timing Range

24 ms to 2032 ms

Door Opener Current Limit

24 V DC/30 V AC, 1 A maximum

External Sensor Current Limit

Power  to  the  external  sensor is provided from the DPH2 card and must be grounded
through the DPH2 card. For the connection diagram. 
The PBX detects input from the sensor when the signal is under 100 

.

Paging Terminal Impedance

600 



MOH (Music on Hold) Terminal Impedance

10 000 



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The NS500 series PBX is constructed in Main Unit (NS500) and up to three expansion unit (NS520).
In Main Unit (NS500), CPU Board (MPR) (Master Processor)  which controlls whole call of this system is equipped, and, in an
expansion unit, CPU Board (SPR) (Slave Processor) controlling various line interfaces in the unit is equipped with.
Each expansion units are connected to Main Unit with star topology, and time slot exchange function is equipped in Main Unit.
The exclusive interface between basic and expansion units are built with one pair of TDM interface of 8.192MHz, and voice chan-
nel, control channel and addition information channel are secured.
All interface cards except digital extension intefarce (DHLC/DLC) are controlled by CPU Board (MPR)/CPU Board (SPR) directly.

Card

Description

CPU Board (MPR) 

Master CPU of NS500 system which controls Main Unit and up to three expansion unit. 

Main Unit Mother Board
(LCOT6+MCSLC16+DLC2)

Ext and Trunk combo card which support analog trunk (6ch), analog extension line (16ch) and digital exclusive
line (2ch).

Card

Description

CPU Board (SPR)

CPU Board (SPR) is a sub CPU card controlling the line card in the expansion unit.

Expansion Unit Mother Board
(MCSLC16)

Extension line card.

MPR

CortexA8

600MHΈ

Master

FPGA

DPT

I/F

2port

PLD1

Extension

ίEXT_PLDὸ

MCSLC16

S-lab

SLIC/CODEC

x8

LCOT6

DSPG

DE56x3

DSP

RMT

NAND

1GB

SRAM

512KB

EXP-M

DDR3

512MB

Extension

Trunk/DPH

TD

M

B

u

s

CP

U

B

u

s

IIO

SPI

LED(2)/SW(1)/USB Host(1)

Mother Board

CPU

SD Card

PLD2

Trunk

ίCO_PLDὸ

Fig.1 Block Diagram

Main Unit

8

Card

Description

SD(L/M/S)

SD card is used for strage memory of UM. SD card is implemented on CPU Board (MPR) .
The capacity of SD card are:
SD(M):16GB§SD(L):8GB§SD(XS):2GB 
In the case of NS500, it is necessary to implement it when using a VoIP functions.

RMT

Modem card which is userd for remote maintenance purpose.
This card is implemented on MRP card.

DSP(L/M/S)

DSP option cards (KX-NS0112/NS0111/NS0110) are used to realize VoIP function, UM function, a voice confer-
ence function.
NS500 can implement only DSP-S.

EXP-M

EXP-M is the expansion interface card which connects up to three expansion units to a Main Unit. 
In each unit interval, below signals are connected:
   1) 8.192MHz clock to supply from a Main Unit to an expansion unit by reference clock
   2) Frame header signal of 8KHz
   3) TDM bus of 8.192MHz from/to basic and expansion unit.
The TDM bus takes advantage of 128 time slots for a voice, control, addition information channel.
Exchange of the non-blocking is possible by a time switch in the Main Unit.