KX-DT321UA — Panasonic PBX Service Manual (repair manual)

Model
KX-DT321UA
Pages
43
Size
1.32 MB
Type
PDF
Document
Service Manual
Brand
Device
PBX / DIGITAL PROPRIETARY TELEPHONE
File
kx-dt321ua.pdf
Date

View Panasonic KX-DT321UA Service Manual online

ORDER NO. KMS0902664CE
Digital Proprietary Telephone
Model No.
KX-DT321UA
KX-DT321UA-B
White Version
Black Version
(for Ukraine)
2
KX-DT321UA/KX-DT321UA-B
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
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------------------ 15
5.1. Name and Locations ------------------------------------ 15
6 Installation Instructions--------------------------------------- 16
7 Troubleshooting Guide---------------------------------------- 17
7.1. No Operation ---------------------------------------------- 17
7.2. LCD Does Not Operate--------------------------------- 18
7.3. Handset Does Not Work-------------------------------- 19
7.4. Speaker-Phone Trouble -------------------------------- 20
7.5. DXDP-DPT Does Not Work --------------------------- 21
8 Disassembly Instructions ------------------------------------ 22
9 Miscellaneous ---------------------------------------------------- 24
9.1. Terminal Guide of ICs, Transistors and
Diodes------------------------------------------------------- 24
9.2. How To Replace a Flat Package IC ----------------- 25
10 Schematic Diagram--------------------------------------------- 26
10.1. Main Board------------------------------------------------- 26
10.2. Waveform -------------------------------------------------- 30
11 Printed Circuit Board ------------------------------------------ 32
11.1. Main Board------------------------------------------------- 32
12 Appendix Information of Schematic Diagram --------- 34
13 Exploded View and Replacement Parts List ----------- 35
13.1. IC 2 ---------------------------------------------------------- 35
13.2. IC6 ----------------------------------------------------------- 37
13.3. Cabinet and Electric Parts ----------------------------- 39
13.4. Accessories and Packing Materials ----------------- 40
13.5. Replacement Parts List --------------------------------- 41
3
KX-DT321UA/KX-DT321UA-B
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).
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-DT321UA/KX-DT321UA-B
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.
3 Specifications
3.1.
General Descriptions
Design and specifications are subject to change without notice.
Station Loop Limit:
90 ohms
Calling Method:
2 pair wire
Jacks:
Handset Jack, TEL Jack (PBX and DXDP),Headset Jack
Dimensions:
Low Angle:
High Angle:
210 (D)mm 
× 175 (W)mm × 129 (H)mm
188 (D)mm 
× 175 (W)mm × 148 (H)mm
Weight:
Under 800 g
Page of 43
Display

Download Panasonic KX-DT321UA Service Manual (Repair Manual)

Here you can view online or download Panasonic KX-DT321UA Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Panasonic KX-DT321UA PBX. Information contained in Panasonic KX-DT321UA service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).