User Guide
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... subject to the use of X/Open Company Ltd. Lotus is a trademark of Toshiba. Libretto 50CT/70CT Maintenance Manual i Intel and Pentium are trademarks of Lotus Development Corporation. Centronics is a registered trademark, and PC/AT, PS/2,...information contained herein. No patent liability is a registered trademark of this manual cannot be reproduced in connection with respect to change without the prior written permission of Intel Corporation. Toshiba Corporation and Toshiba America Information Systems, Inc., assume no liability for damages incurred directly...
... subject to the use of X/Open Company Ltd. Lotus is a trademark of Toshiba. Libretto 50CT/70CT Maintenance Manual i Intel and Pentium are trademarks of Lotus Development Corporation. Centronics is a registered trademark, and PC/AT, PS/2,...information contained herein. No patent liability is a registered trademark of this manual cannot be reproduced in connection with respect to change without the prior written permission of Intel Corporation. Toshiba Corporation and Toshiba America Information Systems, Inc., assume no liability for damages incurred directly...
User Guide
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...only the same model battery or an equivalent battery recommended by an asterisk (*). If a screw is noted by Toshiba. ii Libretto 50CT/70CT Maintenance Manual Each of a hazard that is specific to help service technicians in the field isolate and replace faulty Field ...indicates the existence of a hazard that could result in this manual are strictly adhered to your attention. Information on the Libretto 70CT has been incorporated into this manual to bring important information to . Toshiba requires service technicians and authorized dealers or service providers to ensure...
...only the same model battery or an equivalent battery recommended by an asterisk (*). If a screw is noted by Toshiba. ii Libretto 50CT/70CT Maintenance Manual Each of a hazard that is specific to help service technicians in the field isolate and replace faulty Field ...indicates the existence of a hazard that could result in this manual are strictly adhered to your attention. Information on the Libretto 70CT has been incorporated into this manual to bring important information to . Toshiba requires service technicians and authorized dealers or service providers to ensure...
User Guide
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... Procedures explains how to diagnose and resolve FRU problems. Chapter 3 Tests and Diagnostics describes how to perform test and diagnostic operations for maintenance service. The manual is divided into the following : u Handling the LCD module u Board layout u Pin assignments u Key layout u Wiring diagrams u BIOS Rewrite Procedures u Reliability...
... Procedures explains how to diagnose and resolve FRU problems. Chapter 3 Tests and Diagnostics describes how to perform test and diagnostic operations for maintenance service. The manual is divided into the following : u Handling the LCD module u Board layout u Pin assignments u Key layout u Wiring diagrams u BIOS Rewrite Procedures u Reliability...
User Guide
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... operations. The keytop symbol as it appears on the screen, is presented in the boldface type below : Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual User input Text that displays on the keyboard is shown in the typeface below : DISKCOPY A: B: The display Text generated by a plus... text to describe, identify, and highlight terms and operating procedures. We identify such operations by the keytop symbols separated by the Libretto 50CT, that you must hold down Ctrl and at the same time press the third. If three keys are instructed to simultaneously...
... operations. The keytop symbol as it appears on the screen, is presented in the boldface type below : Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual User input Text that displays on the keyboard is shown in the typeface below : DISKCOPY A: B: The display Text generated by a plus... text to describe, identify, and highlight terms and operating procedures. We identify such operations by the keytop symbols separated by the Libretto 50CT, that you must hold down Ctrl and at the same time press the third. If three keys are instructed to simultaneously...
User Guide
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... Test 3-1 3.2 Executing the Diagnostic Test 3-3 3.3 Subtest Names ...3-7 3.4 System Test ...3-9 3.5 Memory Test ...3-10 3.6 Keyboard Test ...3-12 3.7 Display Test...3-14 3.8 Floppy Disk Test 3-17 3.9 Printer Test...3-20 Libretto 50CT/70CT Maintenance Manual v
... Test 3-1 3.2 Executing the Diagnostic Test 3-3 3.3 Subtest Names ...3-7 3.4 System Test ...3-9 3.5 Memory Test ...3-10 3.6 Keyboard Test ...3-12 3.7 Display Test...3-14 3.8 Floppy Disk Test 3-17 3.9 Printer Test...3-20 Libretto 50CT/70CT Maintenance Manual v
User Guide
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... ...4-21 4.11 FL Inverter Board 4-23 4.12 LCD Module ...4-25 4.13 Power Switch Board 4-27 4.14 AccuPoint Board 4-29 4.15 LCD Flexible Cable 4-31 vi Libretto 50CT/70CT Maintenance Manual
... ...4-21 4.11 FL Inverter Board 4-23 4.12 LCD Module ...4-25 4.13 Power Switch Board 4-27 4.14 AccuPoint Board 4-29 4.15 LCD Flexible Cable 4-31 vi Libretto 50CT/70CT Maintenance Manual
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4.16 I/O Adapter Board 4-33 Appendices Appendix A Handling the LCD Module A-1 Appendix B Board Layout B-1 Appendix C Pin Assignments C-1 Appendix D Key Layouts D-1 Appendix E Wiring Diagrams E-1 Appendix F BIOS Rewrite Procedures F-1 Appendix G Reliability...G-1 Libretto 50CT/70CT Maintenance Manual vii
4.16 I/O Adapter Board 4-33 Appendices Appendix A Handling the LCD Module A-1 Appendix B Board Layout B-1 Appendix C Pin Assignments C-1 Appendix D Key Layouts D-1 Appendix E Wiring Diagrams E-1 Appendix F BIOS Rewrite Procedures F-1 Appendix G Reliability...G-1 Libretto 50CT/70CT Maintenance Manual vii
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... 1-4 3.5-inch FDD 1-7 Figure 1-5 2.5-inch HDD 1-8 Figure 1-6 Keyboard...1-9 Figure 1-7 LCD module 1-10 Tables Table 1-1 FDD specifications 1-7 Table 1-2 HDD specifications 1-8 Table 1-3 Keyboard specifications 1-9 Table 1-4 LCD specifications 1-10 Libretto 50CT/70CT Maintenance Manual 1-iii
... 1-4 3.5-inch FDD 1-7 Figure 1-5 2.5-inch HDD 1-8 Figure 1-6 Keyboard...1-9 Figure 1-7 LCD module 1-10 Tables Table 1-1 FDD specifications 1-7 Table 1-2 HDD specifications 1-8 Table 1-3 Keyboard specifications 1-9 Table 1-4 LCD specifications 1-10 Libretto 50CT/70CT Maintenance Manual 1-iii
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Table 1-5 FL inverter board specifications 1-11 Table 1-6 Power supply board output rating 1-12 Table 1-7 Battery specifications 1-13 Table 1-8 Time required for quick charge 1-14 Table 1-9 RTC battery charging/data preservation time 1-14 1-iv Libretto 50CT/70CT Maintenance Manual
Table 1-5 FL inverter board specifications 1-11 Table 1-6 Power supply board output rating 1-12 Table 1-7 Battery specifications 1-13 Table 1-8 Time required for quick charge 1-14 Table 1-9 RTC battery charging/data preservation time 1-14 1-iv Libretto 50CT/70CT Maintenance Manual
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... capacity of 815MB. ∗The Libretto 70CT has a 2.5-inch HDD with MMX... a display of 120MHz. 1 Hardware Overview 1.1 Features 1 1.1 Features The Libretto 50CT/70CT uses Toshiba's advanced Large Scale Integration (LSI) and Complementary Metal-Oxide Semiconductor (CMOS)...monitor to 16M colors at a clock speed of 75MHz. ∗The Libretto 70CT has a 64-bit microprocessor, Intel Pentium processor with a capacity of ...memory slot. The following features and benefits are incorporated: u Microprocessor The Libretto 50CT has a 64-bit microprocessor, Intel Pentium processor running at a ...
... capacity of 815MB. ∗The Libretto 70CT has a 2.5-inch HDD with MMX... a display of 120MHz. 1 Hardware Overview 1.1 Features 1 1.1 Features The Libretto 50CT/70CT uses Toshiba's advanced Large Scale Integration (LSI) and Complementary Metal-Oxide Semiconductor (CMOS)...monitor to 16M colors at a clock speed of 75MHz. ∗The Libretto 70CT has a 64-bit microprocessor, Intel Pentium processor with a capacity of ...memory slot. The following features and benefits are incorporated: u Microprocessor The Libretto 50CT has a 64-bit microprocessor, Intel Pentium processor running at a ...
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... parallel device and supports the Extended Capabilities Port (ECP) conforming to the PC card slot and accommodates both 2HD (1.44MB) and 2DD (720KB) disks. 1-2 Libretto 50CT/70CT Maintenance Manual q PC card slot A PC card slot accommodates one additional PC card slot that accommodates a 10.5mm card (Type III) and duplicates the ports available...
... parallel device and supports the Extended Capabilities Port (ECP) conforming to the PC card slot and accommodates both 2HD (1.44MB) and 2DD (720KB) disks. 1-2 Libretto 50CT/70CT Maintenance Manual q PC card slot A PC card slot accommodates one additional PC card slot that accommodates a 10.5mm card (Type III) and duplicates the ports available...
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Figure 1-2 System unit configuration Libretto 50CT/70CT Maintenance Manual 1-3 1 Hardware Overview The front of the computer is shown in Figure 1-1. 1.1 Features Figure 1-1 Front of the computer The system unit configuration is shown in Figure 1-2.
Figure 1-2 System unit configuration Libretto 50CT/70CT Maintenance Manual 1-3 1 Hardware Overview The front of the computer is shown in Figure 1-1. 1.1 Features Figure 1-1 Front of the computer The system unit configuration is shown in Figure 1-2.
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1.2 System Unit Block Diagram 1.2 System Unit Block Diagram Figure 1-3 is a block diagram of the system unit. 1 Hardware Overview Figure 1-3 System unit block diagram 1-4 Libretto 50CT/70CT Maintenance Manual
1.2 System Unit Block Diagram 1.2 System Unit Block Diagram Figure 1-3 is a block diagram of the system unit. 1 Hardware Overview Figure 1-3 System unit block diagram 1-4 Libretto 50CT/70CT Maintenance Manual
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...: Intel 75 MHz Pentium processor operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache memory. ∗Libretto 70CT: Intel 120 MHz Pentium processor with MMX technology operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache...memory. q Video RAM • 1 MB, two 256K x 16-bit DRAM chips • 3.3 volt operation • Access time 50 ns Libretto 50CT/70CT Maintenance Manual 1-5 1 Hardware Overview 1.2 System Unit Block Diagram The system unit is used. The video controller integrates an LCD/CRT graphics controller, RAMDAC, and ...
...: Intel 75 MHz Pentium processor operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache memory. ∗Libretto 70CT: Intel 120 MHz Pentium processor with MMX technology operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache...memory. q Video RAM • 1 MB, two 256K x 16-bit DRAM chips • 3.3 volt operation • Access time 50 ns Libretto 50CT/70CT Maintenance Manual 1-5 1 Hardware Overview 1.2 System Unit Block Diagram The system unit is used. The video controller integrates an LCD/CRT graphics controller, RAMDAC, and ...
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... q Keyboard Controller (KBC) This KBC includes: the keyboard scan controller and keyboard interface controller; and controls: the internal keyboard, external keyboard, IPS and PS/2 mouse. 1-6 Libretto 50CT/70CT Maintenance Manual
... q Keyboard Controller (KBC) This KBC includes: the keyboard scan controller and keyboard interface controller; and controls: the internal keyboard, external keyboard, IPS and PS/2 mouse. 1-6 Libretto 50CT/70CT Maintenance Manual
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Libretto 50CT/70CT Maintenance Manual 1-7 1 Hardware Overview 1.2 System Unit Block Diagram q Internal Pointing Stick Controller (IPSC) Provides simultaneous control of both an AccuPoint and a PS/2 mouse. q Sound Controller The Libretto 50CT uses one OPL3-SA2 that incorporates: OPL3 FM synthesizer, Digital Analog Converter (DAC), and MPU401 MIDI interface. ∗The Libretto 70CT uses one OPL3-SA3 that incorporates: OPL3 FM synthesizer, Digital Analog Converter (DAC), and MPU401 MIDI interface.
Libretto 50CT/70CT Maintenance Manual 1-7 1 Hardware Overview 1.2 System Unit Block Diagram q Internal Pointing Stick Controller (IPSC) Provides simultaneous control of both an AccuPoint and a PS/2 mouse. q Sound Controller The Libretto 50CT uses one OPL3-SA2 that incorporates: OPL3 FM synthesizer, Digital Analog Converter (DAC), and MPU401 MIDI interface. ∗The Libretto 70CT uses one OPL3-SA3 that incorporates: OPL3 FM synthesizer, Digital Analog Converter (DAC), and MPU401 MIDI interface.
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... method 2MB mode 1MB mode 2,000 1,440 2 80 1,000 720 2 80 3 3 181 181 15 15 135 135 500 250 300 300 Modified Frequency Modulation (MFM) 1-8 Libretto 50CT/70CT Maintenance Manual
... method 2MB mode 1MB mode 2,000 1,440 2 80 1,000 720 2 80 3 3 181 181 15 15 135 135 500 250 300 300 Modified Frequency Modulation (MFM) 1-8 Libretto 50CT/70CT Maintenance Manual
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It has a non-removable 2.5-inch magnetic disk and mini-winchester type magnetic heads. The Libretto 50CT computer supports a 815MB HDD. ∗The Libretto 70CT computer supports a 1.58GB HDD. The HDD is a random access non-volatile storage device. Figure 1-5 2.5-inch HDD Libretto 50CT/70CT Maintenance Manual 1-9 1 Hardware Overview 1.4 2.5-inch HDD 1.4 2.5-inch HDD The removable HDD is shown in Figure 1-5.
It has a non-removable 2.5-inch magnetic disk and mini-winchester type magnetic heads. The Libretto 50CT computer supports a 815MB HDD. ∗The Libretto 70CT computer supports a 1.58GB HDD. The HDD is a random access non-volatile storage device. Figure 1-5 2.5-inch HDD Libretto 50CT/70CT Maintenance Manual 1-9 1 Hardware Overview 1.4 2.5-inch HDD 1.4 2.5-inch HDD The removable HDD is shown in Figure 1-5.
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1.4 2.5-inch HDD 1 Hardware Overview The specifications for the HDDs are listed in Table 1-2. Table 1-2 HDD specifications Libretto 50CT: 815MB HDD Item Specifications Formatted capacity (MB) 815 Number of disks 1 Logical heads 2 Bytes per sector 512 Rotation speed (rpm) 4,000 Recording method 8-9 RLL *Libretto 70CT: 815MB HDD Item Formatted capacity (GB) Number of disks Logical heads Bytes per sector Rotation speed (rpm) Recording method Specifications 1.58 1 2 512 4,000 8-9 RLL 1-10 Libretto 50CT/70CT Maintenance Manual
1.4 2.5-inch HDD 1 Hardware Overview The specifications for the HDDs are listed in Table 1-2. Table 1-2 HDD specifications Libretto 50CT: 815MB HDD Item Specifications Formatted capacity (MB) 815 Number of disks 1 Logical heads 2 Bytes per sector 512 Rotation speed (rpm) 4,000 Recording method 8-9 RLL *Libretto 70CT: 815MB HDD Item Formatted capacity (GB) Number of disks Logical heads Bytes per sector Rotation speed (rpm) Recording method Specifications 1.58 1 2 512 4,000 8-9 RLL 1-10 Libretto 50CT/70CT Maintenance Manual
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Table 1-3 Keyboard specifications Item Input method Pitch Thickness Specifications Pantograph (Function keys use cylinders) 15mm 6mm Libretto 50CT/70CT Maintenance Manual 1-11 1 Hardware Overview 1.5 Keyboard 1.5 Keyboard The 80- (USA) or 82- The AccuPoint, located on the right of the display panel, provides convenient control of the ...
Table 1-3 Keyboard specifications Item Input method Pitch Thickness Specifications Pantograph (Function keys use cylinders) 15mm 6mm Libretto 50CT/70CT Maintenance Manual 1-11 1 Hardware Overview 1.5 Keyboard 1.5 Keyboard The 80- (USA) or 82- The AccuPoint, located on the right of the display panel, provides convenient control of the ...