Toshiba Libretto 50CT/70CT Manual

							Libretto 50CT/70CT Maintenance ManualE-1Appendix E  
Appendix EWiring Diagrams
E.1Parallel Port Wraparound ConnectorFigure E-1  Parallel port wraparound connector
E.2Serial Port Wraparound ConnectorFigure E-2  Serial port wraparound connector 
						

							Appendix E Wiring DiagramsE-2Libretto 50CT/70CT Maintenance ManualE.3Serial Port Direct Cable (9-Pin to 9-Pin)Figure E-3  Serial port direct cable (9-pin to 9-pin)
E.4Serial Port Direct Cable (9-Pin to 25-Pin)Figure E-4  Serial port direct cable (9-pin to 25-pin) 
						

							Libretto 50CT/70CT Maintenance ManualF-1Appendix F  
Appendix FBIOS Rewrite Procedures
This Appendix explains how to rewrite the system BIOS program to update the BIOS on the
Libretto 50CT/70CT/70CT.
Tools
To rewrite the BIOS, you need the following tool:
q Diagnostics disk for the computer
Rewriting the BIOS
1. Set the system to boot mode.
2. Turn the power off.
3. Remove the external cable and any optional memory or PC card.
4. Turn the power on while holding the F12 key down. (Keep holding the key down until
the system speaker sounds a beep.)
5. When the BIOS message displays, insert the diagnostics disk into the FDD, then press
Enter to start the BIOS rewrite program.
6. When the process is completed, eject the diagnostics disk and press the reset switch to
restart the system. 
						

							Appendix F  BIOS Rewrite ProceduresF-2Libretto 50CT/70CT Maintenance Manual 
						

							Libretto 50CT/70CT Maintenance ManualG-1Appendix G  
Appendix GReliability
The following table shows Mean Time Between Failures (MTBF) for each component.
Table G-1  MTBF
ComponentTime (hours)LCD50,000Keyboard37,000HDD300,000FDD (option)30,000AccuPoint37,000FL Inverter50,000AC Power Unit50,000 
						

							Appendix G ReliabilityG-2Libretto 50CT/70CT Maintenance Manual