User Guide

The manual is divided into the following parts:
Chapter 1 Hardware Overview describes Satellite A50/TECRA A2 series system
unit and each FRU.
Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve
FRU problems.
Chapter 3 Test and Diagnostics describes how to perform test and diagnostic
operations for maintenance service.
Chapter 4 Replacement Procedures describes the removal and replacement of the
FRUs.
Appendices The appendices describe the following:
 Handling the LCD module
 Board layout
 Pin assignment
 Display codes
 Key layout
 Wiring diagrams
 BIOS/KBC/EC Update
 Reliability
iv Satellite A50/TECRA A2 Maintenance Manual (960-478)