The manual is divided into the following parts:

Chapter 1 Hardware Overview describes Satellite A50S/TECRA A3X 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

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[CONFIDENTIAL]

Satellite A50S/TECRA A3X Maintenance Manual (960-534)

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Toshiba A3X manual Confidential