KX-NT321RU (serv.man2) - Panasonic PBX Service Manual (repair manual)

ORDER NO. KMS0806502CE

White Version
(for Russia)

2

PAGE

PAGE

1 Safety Precautions -----------------------------------------------3

1.1. For Service Technicians  ---------------------------------3

2 Warning --------------------------------------------------------------3

2.1. About Lead Free Solder (PbF: Pb free) --------------3

3 Specifications ------------------------------------------------------4

3.1. General Descriptions--------------------------------------4

4 Technical Descriptions------------------------------------------5

4.1. Block Diagram ----------------------------------------------5
4.2. Circuit Operations ------------------------------------------6

5 Location of Controls and Components------------------ 13

5.1. Name and Locations ------------------------------------ 13

6 Installation Instructions--------------------------------------- 14

6.1. Optional Accessory -------------------------------------- 14

7 Troubleshooting Guide---------------------------------------- 15

7.1. No Operation ---------------------------------------------- 15
7.2. LCD Does Not Operate--------------------------------- 18
7.3. Handset Does Not work -------------------------------- 19
7.4. Headset Does Not work -------------------------------- 20
7.5. Speaker-Phone Trouble -------------------------------- 21
7.6. Ethernet Does Not work -------------------------------- 22
7.7. LED Does Not Light ------------------------------------- 24

8 Disassembly Instructions ------------------------------------ 26
9 Maintenance ------------------------------------------------------ 28

9.1. Terminal Guide of the ICs Transistors and

Diodes------------------------------------------------------- 28

9.2. How To Replace a Flat Package IC ----------------- 29
9.3. Memo-------------------------------------------------------- 30

10 Schematic Diagram--------------------------------------------- 31

10.1. Block Diagram -------------------------------------------- 31
10.2. Main No.1 -------------------------------------------------- 32
10.3. Main No.2 -------------------------------------------------- 34
10.4. Main No.3 -------------------------------------------------- 36
10.5. Main No.4 -------------------------------------------------- 38
10.6. Waveform -------------------------------------------------- 40
10.7. Memo-------------------------------------------------------- 43

11 Printed Circuit Board ------------------------------------------ 44

11.1. Main Board------------------------------------------------- 44

12 Appendix Information of Schematic Diagram --------- 46
13 Exploded View and Replacement Parts List ----------- 47

13.1. IC Data------------------------------------------------------ 47
13.2. Cabinet and Electric Parts ----------------------------- 54
13.3. Accessories and Packing Materials ----------------- 55
13.4. Replacement Parts List --------------------------------- 56

3

• Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires,

injury or electric shock, which can be caused by improper repair work.

1. When repair services are provided, neither the products nor their parts or members shall be remodeled.
2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.
3. FASTON terminals shall be plugged straight in and unplugged straight out.

• ICs and LSIs are vulnerable to static electricity.

When repairing, the following precautions will help prevent recurring malfunctions.

1. Cover plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not grasp IC or LSI pins with bare fingers.

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.

4

Rated Specification of the Equipment

List of Hardware Configuration

Design and specifications are subject to change without notice.

VoIP Protocol

proprietary extension

Can be changed by software.

Voice Coding

G.711(64Kbps), G.729A (8Kbps), G.722 (64k/56k/48Kbps)

Call Channel

Hand set, Speaker Phone, Head set
Number of channel: One

Voice Function

Handsfree call, off-hook monitor
Echo canceller

OHCA is not supported on the specification.

Network I/F

LAN port: 10/100Base-TX (RJ45)
PC port: 10/100Base-TX (RJ45)

QoS

802.1p supported (Priority Q: 2 stages)
802.1q tagging VLAN supported

Not supported on the specification.

Network Protocol

TCP/IP, UDP etc.

Display

LCD: 16characters x 1line

Power Supply

Power over LAN: 48V (Compliant with IEEE802.3af)
Optional AC Adapter 9V

Power Consumption 

4W at maximum

Operating Temperature 

0

°C - 40°C

Dimensions

Low Angle: 175 mm (W) x 129 mm (H) x 210 mm (D)
(6 7/3 in x 5 8/32 in x 8 1/4 in)
High Angle: 175 mm (W) x 148 mm (H) x 188 mm (D)
(6 7/3 in x 5 27/32 in x 7 18/32 in)

Mass (Weight)

Under 815 g (1.8 lb)

Main CPU

SANYO (LC821621-E 216pins QFP ARM+DSP+MAC)
51.2MHz operation
System bus width: 32bit

Memory

System Memory
Flash: 2Mbyte/16bit
SDRAM: 8Mbyte/32bit

LAN Interface

LAN port: (10/100base-TX), PC Port: (10/100base-TX)
3 port 10/100 Integrated Switch with PHY and Frame Buffer Micro KSZ8041NL is used.
Priority control of packet of 802.1p

CODEC

G.711(A-Law/

µ-Law), G.729A,G.722

KEY and LED

Number key: 12, Abbreviation: 8, Function key: 10
Navi key: 4 directions,
CO key LED: 2 colors, 8pcs; Function key LED: 6pcs (Message/Ringer LED: 1 color)

Power Supply

Input: AC adapter DC9V/750mA or Power Over LAN DC48V (Compliant with 802.3af)
DCDC power supply: Input +9V or 48V (Power Over LAN)/Output +5.0V, +3.3V, +1.5V