Table of Contents
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Telephone Equipment
KX-TCD440HGS
KX-TCD440HGT
KX-A144EXS-1
KX-A144EXS
KX-A144EXT-1
KX-A144EXT
Digital Cordless Phone
New Silver Version
Titanium Black Version
(for Hungary)
© 2004 Panasonic Communications Co., Ltd. All
rights
reserved.
distribution is a violation of law.
11ORDER NO. KM40406454C2
Unauthorized
copying
and
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Table of Contents
Troubleshooting
Related Manuals for Panasonic KX-A144EXS
Summarization of Contents
Model Configuration Details
Model Configuration Overview
Details the base unit, handset, and charger configurations for each model.
Important Service Notices
Handset Name Plate Identification
Shows how to identify different handset models.
Lead-Free Solder (PbF) Information
Suggested PbF Solder Types and Sizes
Details on recommended lead-free solder types and sizes.
PCB Markings for Lead-Free Solder
Visual guide to identifying PbF marking on Base Unit, Handset, and Charger Unit PCBs.
Service Technician Precautions
Handling ICs and LSIs
Precautions to prevent static electricity damage to ICs and LSIs.
Important Cautions and Safety
Battery Replacement Caution
Warning about danger of explosion if battery is incorrectly replaced.
Product Specifications
Detailed Technical Specifications
Provides technical details on channels, frequency, power, dimensions, and weight.
Battery Management
Battery Installation and Charging
Instructions for installing and charging the handset batteries.
Battery Life and Replacement
Information on battery operating time and replacement procedures.
Control Locations
Base Unit Controls
Identifies controls and their functions on the base unit.
Handset Controls
Identifies controls and their functions on the handset.
Device Settings and Configuration
Connections and Ringer Volume
Guides on connecting units and adjusting ringer volume for base and handset.
PIN Code and Reset Procedures
PIN Code Management
Instructions for setting and managing the PIN code for base unit and handset.
Device Reset Options
Procedures for resetting base unit and handset to default settings.
Advanced Handset Features
Key Lock and PBX Features
How to use key lock, recall feature, and pause button for PBX.
Call Restriction and Bar Settings
Guides on setting call restriction and call bar features.
Display and Dialing Settings
Display Language and Dialing Mode
How to select display language and set dialling mode (tone/pulse).
Flash Time Configuration
Procedure to adjust the flash time for PBX compatibility.
Display Information
Handset Display Icons and Symbols
Explains icons and their meanings shown on the handset display.
Caller ID Display Functionality
Details on how Caller ID information is displayed and its requirements.
Troubleshooting and Problem Solving
Common Issues and Solutions
Guides on resolving common problems with handset, ringing, battery, and caller ID.
Basic Operations
Power Management and Time/Date Setting
How to turn the unit on/off and set the time and date.
Redial Functionality
Instructions for using the redial list and last number dialled.
Phonebook and Quick Dial
Managing Phonebook Entries
How to store, edit, erase, and use phonebook entries.
Hot Key (Quick Dial) Setup
Instructions for assigning and using hot keys for quick dialing.
Handset Registration and Management
Registering Handsets to Base Unit
Procedures for registering and manually registering handsets to the base unit.
Managing Base Unit and Handset Registrations
How to cancel handset or base unit registrations and select a base unit.
Disassembly Procedures
Base Unit Disassembly
Step-by-step guide to disassembling the base unit.
Handset and Charger Unit Disassembly
Guides for disassembling the handset and charger unit.
Assembly Instructions
Base Unit Assembly Warnings
Important warnings when assembling the base unit, focusing on terminal connections.
Ringer/Charge Terminal Lead Processing
Steps for processing the ringer and charge terminal leads during assembly.
Troubleshooting Guide
Troubleshooting Flowchart
A visual flowchart to diagnose and resolve product issues.
Power and Battery Diagnostics
Power Supply Checks
Procedures to check power status for base unit and handset.
Battery Charge Verification
Steps to verify battery charging status for all unit components.
Connectivity and Signal Checks
Link Establishment Verification
Procedures to check if the handset can link with the base unit.
Transmission, Reception, and Caller ID Checks
Guides for checking handset transmission, reception, and Caller ID functionality.
Bell Reception Checks
Base Unit and Handset Bell Reception
Procedures to verify bell signal reception on both base unit and handset.
Advanced Testing Procedures
Base Unit Testing Preparation and PC Setup
Required equipment, jigs, PC setup, and connections for base unit testing.
Handset Testing Preparation and PC Setup
Required equipment, jigs, PC setup, and connections for handset testing.
Base and Charger Unit Adjustments
Base Unit Adjustment Procedures
Step-by-step adjustments for base unit components like BBIC and EEPROM.
Base Unit Adjustment Standards
Base Unit Component Layout
Component view of the base unit circuit board for reference.
Base Unit Flow Solder Side View
Flow solder side view of the base unit circuit board.
Charger Unit Adjustments
Charger Unit Adjustment and Standard View
Procedure for charger unit adjustment and its standard flow solder side view.
Handset Adjustments
Handset Adjustment Procedures
Step-by-step adjustments for handset components like BBIC and EEPROM.
Handset Adjustment Standards
Handset Component Layout and Flow Solder View
Component and flow solder views of the handset circuit board.
RF Specifications
Base Unit and Handset RF Parameters
Lists RF specifications for TX Power, Modulation, and RX Sensitivity.
Frequency Table
Base Unit and Handset Frequencies
Table showing transmit and receive frequencies for each channel.
Base Unit Block Diagram
Base Unit Functional Blocks
Block diagram illustrating the main functional blocks of the base unit.
Base Unit Circuit Operation
Base Unit Outline and IC Functions
Overview of base unit ICs and their roles in operation.
Base Unit Circuit Operations
Power Supply and Telephone Line Interface
Explains the power supply circuit and telephone line interface functions.
Transmitter/Receiver and Pulse Dialing
Details transmitter/receiver operation and pulse dialing mechanism.
Handset Block Diagram
Handset Functional Blocks
Block diagram illustrating the main functional blocks of the handset.
Handset Circuit Operations
Power, Charging, and Battery Detection
Explains power supply, charging, and battery low detection circuits.
Speakerphone Operation
Describes the operation of the speakerphone function.
Charger Unit Circuit Operation
Charger Unit Power Supply
Details the power supply circuit for the charger unit.
Signal Route Analysis
Signal Flow Paths
Illustrates signal paths for various functions like DTMF, CDL, SP-Phone, and Caller ID.
Base Unit CPU Data
IC2 (BBIC) Pin Configuration
Detailed pin description for the IC2 (BBIC) chip in the base unit.
Handset CPU Data
IC1 (BBIC) Pin Configuration
Detailed pin description for the IC1 (BBIC) chip in the handset.
Base Unit EEPROM Layout
EEPROM General Setup and Controls
Details EEPROM layout, general setup, and switch control configurations.
EEPROM Settings for Flash, CLIP, and Tasks
Covers EEPROM settings for flash time, CLIP, and various task configurations.
Handset EEPROM Layout
Handset EEPROM General Settings and Battery Parameters
Details EEPROM layout for handset, including general setup and battery parameters.
Handset EEPROM Volume and Menu Settings
Covers EEPROM settings for volume control and menu configuration on the handset.
Flat Package IC Replacement
IC Replacement Preparation and Procedure
Steps for preparing and replacing flat package ICs, including bridge modification.
Component and Cabinet Locations
Base Unit Parts Location
Exploded view showing parts location for the base unit.
Handset and Charger Unit Parts Location
Exploded views showing parts location for the handset and charger unit.
Accessories and Packing
Accessories for KX-TCD440HGS/HGT and KX-A144EXS/EXT
Lists accessories and packing materials for different model series.
Component Terminal Guides
IC, Transistor, and Diode Terminals
Provides terminal identification for ICs, transistors, and diodes used in Base Unit, Handset, and Charger.
Replacement Parts List
Base Unit Parts
Lists replacement parts for the Base Unit, including cabinets, PCBs, ICs, and discrete components.
Handset and Charger Unit Parts
Lists replacement parts for Handset and Charger Unit, including cabinets, PCBs, ICs, and discrete components.
Schematic Diagram References
Schematic Diagrams for Base Unit, Handset, and Charger
References to schematic diagrams for all unit components.
Schematic Diagrams
Base Unit Schematic Diagram
Detailed schematic diagram of the base unit's circuitry.
Handset and Charger Unit Schematic Diagrams
Detailed schematic diagrams for the handset and charger unit.
Circuit Board Views
Base Unit Component and Solder Side Views
Component and flow solder side views of the base unit circuit board.
Handset and Charger Unit Circuit Board Views
Component and flow solder side views for handset and charger unit circuit boards.
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