KX-AT7730RU (serv.man2) — Panasonic Telephone Service Manual (repair manual)

Model
KX-AT7730RU (serv.man2)
Pages
45
Size
3.2 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / PROPRIETARY TELEPHONE
File
kx-at7730ru-sm2.pdf
Date

View Panasonic KX-AT7730RU (serv.man2) Service Manual online

ORDER NO. KMS1806178CE
PROPRIETARY TELEPHONE
Model No.
KX-AT7730
 Series
[ Version 3.0 ]
KX-AT7730UE
Ver.No
Model No.
Destination
1
2
KX-AT7730X
KX-AT7730XB
Asia, Latin America, Middle East 
and Africa
KX-AT7730HK
KX-AT7730HKB Asia, Middle East and Africa
KX-AT7730RU
---
Russian, Armenian, Kazakh,  Kyrgyz
KX-AT7730SXB
KX-AT7730SX
India
KX-AT7730NE
---
Europe
White Version
Black Version
KX-AT7730UEB Middle East Africa
3
KX-AT7730NEB ---
Europe
WARNING
If lead free solder was used in the manufacture of this product, the printed circuit boards will be marked PbF.
Standard  leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear please read and follow the special instructions described in this manual on the
use of PbF and how it might be permissible to use Pb solder during service and repair work.  
There are special components used in this equipment which are important for safety. These parts are marked by      
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that
these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards. 
Do not modify the original design without permission of manufacturer. 
IMPORTANT  INFORMATION  ABOUT  LEAD  FREE,  (PbF),  SOLDERING
IMPORTANT  SAFETY  NOTICE
When you note the serial number, write down 11 digits. The serial number may be found on the bottom of the unit.
2
KX-AT7730 Series
TABLE OF CONTENTS
PAGE
1 Safety Precautions -----------------------------------------------3
1.1. For Service Technicians  ---------------------------------3
2 Warning --------------------------------------------------------------3
2.1. Information for Users on Collection and 
Disposal of Old Equipment and used Batteries-----3
2.2. About Lead Free Solder (PbF: Pb free) --------------4
2.2.1. Suggested PbF Solder -------------------------------4
2.3. Discarding of P. C. Board --------------------------------4
3 Specifications ------------------------------------------------------5
4 Technical Descriptions------------------------------------------6
4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operations------------------------------------------7
4.2.1. KEY INPUT CONTROL CIRCUIT-----------------7
4.2.2. LED CIRCUIT ------------------------------------------8
4.2.3. DATA COMMUNICATION CIRCUIT --------------9
4.2.4. TONE GENERATION CIRCUIT ----------------- 10
4.2.5. HANDSET CIRCUIT-------------------------------- 11
4.2.6. SPEAKERPHONE CIRCUIT --------------------- 12
5 Location of Controls and Components------------------ 14
5.1. Name and Locations ------------------------------------ 14
6 Installation Instructions--------------------------------------- 16
6.1. Connections ----------------------------------------------- 16
7 Troubleshooting Guide---------------------------------------- 17
7.1. NO OPERATION ----------------------------------------- 17
7.2. HANDSET TROUBLE----------------------------------- 18
7.3. SPEAKER-PHONE TROUBLE ----------------------- 19
7.4. TONE DIAL TORUBLE --------------------------------- 20
7.5. THE ELECTRONIC VOLUME OF THE 
SPEAKER-PHONE DOES NOT WORK ----------- 20
7.6. THE ELECTRONIC VOLUME OF HANDSET 
DOES NOT WORK -------------------------------------- 20
8 Disassembly and Assembly Instructions--------------- 21
9 Maintenance ------------------------------------------------------ 23
9.1. How To Replace a Flat Package IC ----------------- 23
9.1.1. Preparation-------------------------------------------- 23
9.1.2. Removal Procedure--------------------------------- 23
9.1.3. Procedure --------------------------------------------- 23
9.1.4. Removing Solder From Between Pins --------- 23
10 Schematic Diagram--------------------------------------------- 24
10.1. for KX-AT7730X, XB / KX-AT7730SX, SXB ------- 24
10.2. for KX-AT7730NE, NEB / KX-AT7730HK, HKB--- 25
10.3. for KX-AT7730UE, UEB -------------------------------- 26
10.4. for KX-AT7730RU ---------------------------------------- 27
11 Printed Circuit Board ------------------------------------------ 28
11.1. COMPONENT VIEW------------------------------------ 28
11.2. BOTTOM VIEW------------------------------------------- 29
12 Appendix Information of Schematic Diagram --------- 30
13 Exploded View and Replacement Parts List ----------- 31
13.1. CABINET AND ELECTRICAL PARTS 
LOCATION------------------------------------------------- 31
13.2. ACCESSORIES AND PACKING MATERIALS --- 32
13.3. Replacement Parts List --------------------------------- 33
13.3.1. Cabinet and Electrical Parts ---------------------- 33
13.3.2. Accessories and Packing Materials------------- 34
13.3.3. Main Board Parts ------------------------------------ 34
14 History -------------------------------------------------------------- 45
3
KX-AT7730 Series
1 Safety Precautions
1. Before servicing, unplug the AC power cord to prevent an electric shock.
2. When replacing parts, use only the manufacturer's recommended components.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent
the customer from being exposed to shock hazards.
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.
Information for Users on Collection and Disposal of Old Equipment and 
used Batteries
4
KX-AT7730 Series
2.2.
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 
contains lead.
We will use PbF solder 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 °F - 70 °F (30 °C - 40 °C) higher than Pb solder. Please use a soldering iron with 
temperature control and adjust it to 700 °F ± 20 °F (370 °C ± 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 the figure below).
2.2.1.
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.
2.3.
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.
Page of 45
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Here you can view online or download Panasonic KX-AT7730RU (serv.man2) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Panasonic KX-AT7730RU (serv.man2) Telephone. Information contained in Panasonic KX-AT7730RU (serv.man2) 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).