KX-TDA3451XJ, KX-TDA3451X - Panasonic PBX Service Manual (repair manual)

kx-tda3451xj, kx-tda3451x service manual
Model
KX-TDA3451XJ KX-TDA3451X
Pages
23
Size
1.24 MB
Type
PDF
Document
Service Manual
Brand
Device
PBX / 4-CHANNEL VOLP DSP CARD
File
kx-tda3451xj-kx-tda3451x.pdf
Date

Read Panasonic KX-TDA3451XJ / KX-TDA3451X Service Manual online

ORDER NO. KMS0706350CE
 4-Channel VolP DSP Card
KX-TDA3451XJ
KX-TDA3451X
(for Canada, Asia, Oceania, Europe, Middle Near Esat, 
Russia, Africa and Latin America)
2
KX-TDA3451XJ / KX-TDA3451X
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
3 Specifications ------------------------------------------------------4
4 Technical Descriptions
------------------------------------------4
4.1. Block Diagram ----------------------------------------------4
4.2. Circuit Operations ------------------------------------------4
5 Location of Controls and Components--------------------5
5.1. Names and Locations-------------------------------------5
6 Installation Instructions-----------------------------------------6
6.1. Installing/Removing the Optional Service
Cards ----------------------------------------------------------6
7 Troubleshooting Guide------------------------------------------8
7.1. Introduction --------------------------------------------------8
7.2. Power supply problem ------------------------------------8
7.3. Call test ----------------------------------------------------- 10
7.4. Error log ---------------------------------------------------- 10
8 Miscellaneous ---------------------------------------------------- 11
8.1. Terminal Guide of the ICs Transistors and
Diodes------------------------------------------------------- 11
8.2. How To Replace a Flat Package IC ----------------- 12
9 Schematic Diagram--------------------------------------------- 14
9.1. Main No.1 -------------------------------------------------- 14
9.2. Waveform -------------------------------------------------- 18
10 Printed Circuit Board ------------------------------------------ 19
10.1. Main Board------------------------------------------------- 19
11 Appendix Information of Schematic Diagram --------- 20
12 Exploded View and Replacement Parts List ----------- 21
12.1. Accessories and Packing Material------------------- 21
12.2. Replacement Parts List --------------------------------- 22
3
KX-TDA3451XJ / KX-TDA3451X
1 Safety Precautions
1.1.
For Service Technicians 
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover the plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch 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).
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.
4
KX-TDA3451XJ / KX-TDA3451X
3 Specifications
Following table shows the specifications.
4 Technical Descriptions
4.1.
Block Diagram
4.2.
Circuit Operations
4.2.1.
Explanation
Configuration:
DSP (IC101)
Explanation DSP card connector (CN2)
Function:
DSP works as a CODEC (G.711 and G.729AB) with echo cancel and jitter buffer functions, it can add four voice channels on KX-
TDA3451.
Function
Description
CODEC
DSP
For ITU-T G711, G729AB
A/
µ - law selectable (call by call)
Power supply
+3.3V
For the peripheral circuitry 
It is supplied from the PBX Main board.
DSP (4ch)
IC101
Address BHA [0-3]
Data BHD [0-7]
Control Signal
nVPRST
HW_FH
HW_CLK_XIN/SCLK
+3.3V
50pin connector (CN2)
(T
o SIP-GW4)
PCM Data
KX-TDA3451XJ/KX-TDA3451X BLOCK DIAGRAM
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Here you can read online and download Panasonic KX-TDA3451XJ / KX-TDA3451X Service Manual in PDF. KX-TDA3451XJ / KX-TDA3451X service manual will guide through the process and help you recover, restore, fix, disassemble and repair Panasonic KX-TDA3451XJ / KX-TDA3451X PBX. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.