1 Hardware Overview
1.1 Features
Libretto 50CT/70CT Maintenance Manual
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1.1 Features
The Libretto 50CT/70CT uses Toshiba’s advanced Large Scale Integration (LSI) and
Complementary Metal-Oxide Semiconductor (CMOS) technology extensively to provide
compact size, minimum weight, low power usage, and high reliability. The following features
and benefits are incorporated:
❑
Microprocessor
The Libretto 50CT has a 64-bit microprocessor, Intel Pentium processor running at a
clock speed of 75MHz.
∗
The Libretto 70CT has a 64-bit microprocessor, Intel Pentium processor with MMX
technology running at a clock speed of 120MHz.
q
Memory
Standard 16MB of Extend Data Out (EDO) DRAM.
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Hard Disk Drive (HDD)
The Libretto 50CT has a 2.5-inch HDD with a capacity of 815MB.
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The Libretto 70CT has a 2.5-inch HDD with a capacity of 1.58GB.
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Display
A 6.1-inch, Thin Film Transistor (TFT) color Liquid Crystal Display (LCD), that
enables a display of up to 16M colors at a resolution of 640 x 480 pixels.
A video controller and 1MB of VRAM enable an external monitor to display 16M
colors at a resolution of 1280 x 1024 pixels.
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Keyboard
An easy-to-use 80/82-key keyboard provides: a numeric keypad overlay for fast
numeric data entry and cursor/page control; two keys that have special functions in
Microsoft Windows 95; and software that supports a 101- or 102-key enhanced
keyboard.
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Batteries
Two batteries: a Lithium-Ion main battery pack and RTC battery that backs up the
Real Time Clock and CMOS memory.
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Expansion
An optional 8 or 16MB memory kit can be installed in the memory slot.
Summary of Contents for Libretto 50CT
Page 8: ...viii Libretto 50CT 70CT Maintenance Manual ...
Page 10: ...Chapter 1 Hardware Overview ...
Page 11: ...1 ii Libretto 50CT 70CT Maintenance Manual ...
Page 30: ...Chapter 2 Troubleshooting Procedures ...
Page 31: ...2 ii Libretto 50CT 70CT Maintenance Manual ...
Page 61: ...Chapter 3 Tests and Diagnostics ...
Page 62: ...3 ii Libretto 50CT 70CT Maintenance Manual ...
Page 64: ...3 iv Libretto 50CT 70CT Maintenance Manual 3 22 2 Operations 3 45 ...
Page 128: ...Chapter 4 Replacement Procedures ...
Page 129: ...4 ii Libretto 50CT 70CT Maintenance Manual ...
Page 167: ...Appendices ...
Page 168: ...App ii Libretto 50CT 70CT Maintenance Manual ...
Page 178: ...Appendix B Board Layout B 4 Libretto 50CT 70CT Maintenance Manual ...
Page 183: ...Appendix C Pin Assignments Libretto 50CT 70CT Maintenance Manual C 5 ...
Page 186: ...Appendix Appendix C Pin Assignments C 8 Libretto 50CT 70CT Maintenance Manual 43 GND 44 NC ...
Page 194: ...Appendix F BIOS Rewrite Procedures F 2 Libretto 50CT 70CT Maintenance Manual ...
Page 196: ...Appendix G Reliability G 2 Libretto 50CT 70CT Maintenance Manual ...