Toshiba 40XF550U - User Manual

SERVICE MANUAL
LCD Color Television
40XF550U Rev.1
This model is classified as a green product (*1), as indicated by the underlined serial number.
This Service Manual describes replacement parts for the green product. When repairing this
green product, use the part(s) described in this manual and lead-free solder (*2).
For (*1) and (*2), refer to GREEN PRODUCT PROCUREMENT and LEAD-FREE
SOLDER.
© TOSHIBA CORPORATION 2009
For Technical Bulletins, Technical Tips, or other information regarding the
service of this model, visit the Toshiba America Consumer Products National
Service Division website at:
www7.toshiba.com

Summary

Service Manual Introduction and Model Information

Model Identification and Service Website

Identifies the model 40XF550U and provides the service website URL for technical information.

Safety and Environmental Guidelines

Important Notices and Disclaimers

General warnings, liability limitations, and data usage terms for service personnel.

Green Product and Lead-Free Solder Policy

Toshiba's commitment to environmental responsibility in parts procurement and repair practices.

General Safety Precautions

Critical safety measures and warnings for service personnel before beginning repairs.

Detailed Service and Repair Procedures

AC Leakage Current Testing

Procedure for checking AC leakage current on exposed metallic parts to ensure user safety.

Product Safety Notice

Highlights parts with special safety characteristics crucial for preventing hazards.

LCD Module Handling Precautions

Warnings for safely handling the LCD module, including sharp edges and fluid contact.

LCD Module Care and Protection

LCD Panel Cleaning and Surface Care

Guidelines for cleaning the LCD panel surface without causing damage or scratches.

LCD Module Static and Environmental Protection

Guidelines to prevent damage to LCD module circuitry from static electricity or environmental factors.

Service Mode and Diagnostics

Entering and Exiting Service Mode

Step-by-step instructions for accessing and leaving the TV's service mode.

LED Indication Status

Explanation of LED indicators on the TV for status and error reporting.

Block Diagrams and Signal Flow

Power Distribution and Signal Flow

Diagram illustrating power distribution and video/audio signal paths in the TV.

AV Terminals and PCB Connections

Detailed block diagram showing AV inputs and connections to various PCBs.

Troubleshooting Flowcharts

Dead Set Troubleshooting

Flowchart to diagnose 'dead set' issues based on voltage checks and LED indications.

Picture Problem Troubleshooting

Flowchart to diagnose picture issues, including backlight and display panel problems.

Backlight Operation Troubleshooting

Flowchart to diagnose and resolve improper backlight operation issues.

Audio Problem Troubleshooting

Flowchart to diagnose and resolve no or distorted audio issues.

Replacement Parts List

Component Identification and Part Numbers

List of replacement parts with their location, part number, and description.

Toshiba 40XF550U Specifications