Brand: TOSHIBA
Category: Laptop
Document Type: Manual
Language: EN
Manual for Libretto 50CT/70CT
Uploaded: Nov. 21, 2025, 6:10 p.m.
Manual Publish Date: 1998-02-01
This manual describes hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT. It is intended for service technicians to help isolate and replace faulty Field Replaceable Units (FRUs). The manual is divided into chapters covering hardware overview, troubleshooting procedures, tests and diagnostics, and replacement procedures. Appendices include handling the LCD module, board layout, pin assignments, key layouts, wiring diagrams, BIOS rewrite procedures, and reliability information. Safety precautions are highlighted with DANGER, WARNING, CAUTION, and NOTE messages.
Troubleshooting and error codes
| Component | Time (hours) |
|---|---|
| LCD | 50,000 |
| Keyboard | 37,000 |
| HDD | 300,000 |
| FDD (option) | 30,000 |
| AccuPoint | 37,000 |
| FL Inverter | 50,000 |
| AC Power Unit | 50,000 |