KX-NT400RU - Panasonic PBX Service Manual (repair manual)

kx-nt400ru service manual
Model
KX-NT400RU
Pages
108
Size
4.33 MB
Type
PDF
Document
Service Manual
Brand
Device
PBX / IP PROPRIETARY TELEPHONE
File
kx-nt400ru.pdf
Date

View Panasonic KX-NT400RU Service Manual online

ORDER NO. KMS1003764CE
IP Proprietary Telephone
Model No. 
KX-NT400RU
(for Russia, Ukraine)
2
KX-NT400RU
TABLE OF CONTENTS
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
2.1.1. Suggested PbF Solder -------------------------------4
2.2. Discarding of P. C. Board --------------------------------4
3 Specifications ------------------------------------------------------5
3.1. General Descriptions--------------------------------------5
4 Technical Descriptions------------------------------------------6
4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operations ------------------------------------------7
4.2.1. Main-CPU (IC1)----------------------------------------7
4.2.2. Application-CPU (IC101) ----------------------------7
4.2.3. LED Circuit ----------------------------------------------7
4.2.4. Backlight Circuit----------------------------------------8
4.2.5. TouchPanel I/F Circuit--------------------------------8
4.2.6. Reset Circuit --------------------------------------------9
4.2.7. Ethernet Circuit -------------------------------------- 10
4.2.8. Analog Circuit ---------------------------------------- 11
4.2.9. Sub-CPU(IC4)---------------------------------------- 13
4.2.10. KEY Input Control Circuit-------------------------- 14
4.2.11. LED Circuit -------------------------------------------- 15
4.2.12. Power Supply Circuit ------------------------------- 16
4.2.13. Bluetooth I/F Circuit--------------------------------- 17
4.2.14. SD Card I/F Circuit ---------------------------------- 17
4.2.15. USB I/F Circuit --------------------------------------- 18
5 Location of Controls and Components------------------ 19
5.1. Name and Locations ------------------------------------ 19
5.1.1. Front View--------------------------------------------- 19
5.1.2. Right Side View -------------------------------------- 20
5.1.3. Left Side View ---------------------------------------- 20
5.1.4. Back View --------------------------------------------- 21
5.1.5. Bottom View ------------------------------------------ 21
6 Installation Instructions--------------------------------------- 22
7 Troubleshooting Guide
---------------------------------------- 23
7.1. No Operation ---------------------------------------------- 23
7.1.1. Power Supply : AC adaptor ----------------------- 23
7.1.2. Power Supply : PoE Hub -------------------------- 23
7.2. LCD Does Not work ------------------------------------- 27
7.3. Touch Panel Does Not work--------------------------- 28
7.4. Sound of Tap Screen Does Not work --------------- 29
7.5. Handset Does Not work -------------------------------- 30
7.5.1. Receive ------------------------------------------------ 30
7.5.2. Send ---------------------------------------------------- 30
7.6. Headset Does Not work -------------------------------- 31
7.6.1. Receive ------------------------------------------------ 31
7.6.2. Send ---------------------------------------------------- 31
7.7. Speaker-Phone Does Not work----------------------- 32
7.7.1. Receive ------------------------------------------------ 32
7.7.2. Send ---------------------------------------------------- 32
7.8. Ethernet Does Not work -------------------------------- 33
7.8.1. LAN port ----------------------------------------------- 33
7.8.2. PC port ------------------------------------------------- 34
7.8.3. Internal MII connection----------------------------- 35
7.8.4. PoE (Power over Ethernet) ----------------------- 35
7.9. LED Does Not Light ------------------------------------- 36
7.10. Bluetooth Does Not work------------------------------- 36
7.11. USB Port does not work-------------------------------- 37
7.12. SD Card does not work -------------------------------- 37
8 Disassembly and Assembly Instructions -------------- 38
8.1. Remove Main Board and Jack Board -------------- 38
8.2. Disassembly for Lower Cabinet Ass’y-------------- 40
8.3. Disassembly for Stand Ass’y-------------------------- 40
8.4. Assembly for Lower Cabinet Ass’y  ----------------- 41
9 Miscellaneous --------------------------------------------------- 44
9.1. Terminal Guide of the ICs Transistors and
Diodes ------------------------------------------------------ 44
9.2. How To Replace a Flat Package IC----------------- 46
9.2.1. Preparation ------------------------------------------- 46
9.2.2. Removal Procedure -------------------------------- 46
9.2.3. Procedure--------------------------------------------- 46
9.2.4. Removing Solder From Between Pins--------- 46
9.3. Memo ------------------------------------------------------- 47
10 Schematic Diagram -------------------------------------------- 48
10.1. Main Board ------------------------------------------------ 48
10.1.1. L2SW , PoE , Power DC -------------------------- 48
10.1.2. VoIP ---------------------------------------------------- 52
10.1.3. Analog Interface------------------------------------- 54
10.1.4. SUB-CPU , LED , KEY SCAN , Bluetooth
Interface ----------------------------------------------- 56
10.1.5. CE (X-Scale) ----------------------------------------- 58
10.1.6. Power , LCD Interface , JK Board Interface -- 62
10.2. Sub Board ------------------------------------------------- 64
10.3. Waveform-------------------------------------------------- 65
11 Printed Circuit Board------------------------------------------ 71
11.1. Main Board ------------------------------------------------ 71
11.1.1. Component View------------------------------------ 71
11.1.2. Bottom View------------------------------------------ 72
11.2. Sub1 Board------------------------------------------------ 73
11.2.1. Component View------------------------------------ 73
11.2.2. Bottom View------------------------------------------ 74
11.3. Sub2 Board------------------------------------------------ 75
11.3.1. Component View------------------------------------ 75
11.3.2. Bottom View------------------------------------------ 75
12 Appendix Information of Schematic Diagram -------- 76
13 Exploded View and Replacement Parts List
----------- 77
13.1. IC Data ----------------------------------------------------- 77
13.1.1. IC1 (VoIP)--------------------------------------------- 77
13.1.2. IC5 (Ethernet)---------------------------------------- 81
13.1.3. IC111 (DODEC) ------------------------------------- 84
13.1.4. IC107 (MAC/PHY) ---------------------------------- 85
13.1.5. IC120 (LED driver)---------------------------------- 86
13.1.6. IC7 (PoE) --------------------------------------------- 88
13.1.7. IC101 (XScale) -------------------------------------- 89
13.2. Cabinet and Electric Parts----------------------------- 98
13.3. Accessories and Packing Materials----------------- 99
13.4. Replacement Parts List ------------------------------- 100
13.4.1. Cabinet and Electrical Parts---------------------100
13.4.2. Accessories and Packing Materials -----------100
13.4.3. Main Board Parts ----------------------------------101
13.4.4. Jack Board Parts-----------------------------------108
3
KX-NT400RU
1 Safety Precautions
1.1.
For Service Technicians 
• 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.
2 Warning
2.1.
About Lead Free Solder (PbF: Pb free)
Note:
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. 
Caution
• 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).
4
KX-NT400RU
2.1.1.
Suggested PbF Solder
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.
2.2.
Discarding of P. C. Board
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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