Toshiba NB250/NB255 Service Manual

This document is the maintenance manual for Toshiba Personal Computer NB250/NB255, describing the features and characteristics of the product.

Brand: Toshiba
Category: Laptops
Document type: Service Manual
Language: English
Pages: 222
File format: PDF
File size: 7.8 MB
Published: 03 May, 2012
Updated: 29 September, 2023
Model: NB250
MD5 checksum: 6FCD725B3302C124EA5E9C6E89B9F09C
PDF: Toshiba NB250/NB255 Service Manual PDF

About this manual

This maintenance manual provides service technicians with detailed hardware overviews, troubleshooting steps, diagnostic tests, and replacement procedures for the Toshiba Satellite NB250/NB255 series laptops. Safety messages such as DANGER, WARNING, CAUTION, and NOTE are highlighted throughout to ensure safe handling.

The document also includes appendices with LCD handling, board layouts, pin assignments, screw torque specifications, and reliability data such as MTBF values for key components.

What's inside

Hardware Overview
Troubleshooting Procedures
Test and Diagnostics
Replacement Procedures
Appendices
Reliability

Specifications

LCD MTBF	10,000 hours
Keyboard MTBF	64,400 hours
HDD MTBF	300,000 hours
Optical (DVD/CD) drive MTBF	60,000 hours
AC adaptor MTBF	50,000 hours

Frequently asked questions

What battery should be used when replacing the battery pack?

Only the same model battery or an equivalent battery recommended by Toshiba should be used.

What is the purpose of the MTBF table in the appendix?

It provides the Mean Time Between Failures for each component, helping assess reliability.

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