User Guide
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...MMX is subject to the use of Lotus Development Corporation. Libretto 50CT/70CT Maintenance Manual i No patent liability is assumed with the furnishing, performance, or use of Intel Corporation. Toshiba Corporation and Toshiba America Information Systems, Inc., assume no liability for damages ... omissions, or discrepancies in connection with respect to change without the prior written permission of Novell, Inc. Toshiba Libretto 50CT/70CT Maintenance Manual Third edition February 1998 Disclaimer The information contained in any form without notice. Sound Blaster and Pro are...
...MMX is subject to the use of Lotus Development Corporation. Libretto 50CT/70CT Maintenance Manual i No patent liability is assumed with the furnishing, performance, or use of Intel Corporation. Toshiba Corporation and Toshiba America Information Systems, Inc., assume no liability for damages ... omissions, or discrepancies in connection with respect to change without the prior written permission of Novell, Inc. Toshiba Libretto 50CT/70CT Maintenance Manual Third edition February 1998 Disclaimer The information contained in any form without notice. Sound Blaster and Pro are...
User Guide
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...that could result in bodily injury if the safety instruction is not observed. q Be sure to safe maintenance services. ii Libretto 50CT/70CT Maintenance Manual The procedures described in the field isolate and replace faulty Field Replaceable Units (FRUs). Each of a hazard that the following ...in this manual since its original release. If a screw is not fully fastened, it could loosen and create a short circuit, which could result in property damage if the safety instruction is specific to perform hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT....
...that could result in bodily injury if the safety instruction is not observed. q Be sure to safe maintenance services. ii Libretto 50CT/70CT Maintenance Manual The procedures described in the field isolate and replace faulty Field Replaceable Units (FRUs). Each of a hazard that the following ...in this manual since its original release. If a screw is not fully fastened, it could loosen and create a short circuit, which could result in property damage if the safety instruction is specific to perform hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT....
User Guide
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... 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 Libretto 50CT/70CT Maintenance Manual iii Chapter 4 Replacement Procedures describes the removal and replacement of the FRUs. Appendices The appendices describe the following parts: Chapter 1 Hardware Overview describes the system ...
... 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 Libretto 50CT/70CT Maintenance Manual iii Chapter 4 Replacement Procedures describes the removal and replacement of the FRUs. Appendices The appendices describe the following parts: Chapter 1 Hardware Overview describes the system ...
User Guide
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... appearance, and whenever necessary for clarification, acronyms are used in the typeface below: Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual We identify such operations by the keytop symbols separated by the Libretto 50CT, that displays on the keyboard is presented in the text to simultaneously use two or more keys. Conventions This...
... appearance, and whenever necessary for clarification, acronyms are used in the typeface below: Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual We identify such operations by the keytop symbols separated by the Libretto 50CT, that displays on the keyboard is presented in the text to simultaneously use two or more keys. Conventions This...
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
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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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... at a clock speed of 120MHz. q Keyboard An easy-to provide compact size, minimum weight, low power usage, and high reliability. Libretto 50CT/70CT Maintenance Manual 1-1 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) technology extensively to -use 80/82-key keyboard provides: a numeric...
... at a clock speed of 120MHz. q Keyboard An easy-to provide compact size, minimum weight, low power usage, and high reliability. Libretto 50CT/70CT Maintenance Manual 1-1 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) technology extensively to -use 80/82-key keyboard provides: a numeric...
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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 A Universal Asynchronous Receiver/Transmitter (UART) is connected to IEEE-1284. q External monitor port The port is equipped with a built-in addition to play back...
... 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 A Universal Asynchronous Receiver/Transmitter (UART) is connected to IEEE-1284. q External monitor port The port is equipped with a built-in addition to play back...
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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. Figure 1-2 System unit configuration Libretto 50CT/70CT Maintenance Manual 1-3
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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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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 composed of 1M x 16-bit EDO DRAM chips. • 3.3 volt operation • No parity bit ... are used for system BIOS − 40 KB are used for 8 and 16 MB memory kits, which consist of the following major components: q Microprocessor Libretto 50CT: Intel 75 MHz Pentium processor 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 composed of 1M x 16-bit EDO DRAM chips. • 3.3 volt operation • No parity bit ... are used for system BIOS − 40 KB are used for 8 and 16 MB memory kits, which consist of the following major components: q Microprocessor Libretto 50CT: Intel 75 MHz Pentium processor operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache memory. ∗...
User Guide
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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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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. 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. Libretto 50CT/70CT Maintenance Manual 1-7
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. 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. Libretto 50CT/70CT Maintenance Manual 1-7
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... 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 Figure 1-4 3.5-inch FDD The specifications for the FDD are listed in Figure 1-4. Table 1-1 FDD specifications Item Storage capacity (KB) Unformatted Formatted Number of heads...
... 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 Figure 1-4 3.5-inch FDD The specifications for the FDD are listed in Figure 1-4. Table 1-1 FDD specifications Item Storage capacity (KB) Unformatted Formatted Number of heads...
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It has a non-removable 2.5-inch magnetic disk and mini-winchester type magnetic heads. The HDD is a random access non-volatile storage device. 1 Hardware Overview 1.4 2.5-inch HDD 1.4 2.5-inch HDD The removable HDD is shown in Figure 1-5. Figure 1-5 2.5-inch HDD Libretto 50CT/70CT Maintenance Manual 1-9 The Libretto 50CT computer supports a 815MB HDD. ∗The Libretto 70CT computer supports a 1.58GB HDD.
It has a non-removable 2.5-inch magnetic disk and mini-winchester type magnetic heads. The HDD is a random access non-volatile storage device. 1 Hardware Overview 1.4 2.5-inch HDD 1.4 2.5-inch HDD The removable HDD is shown in Figure 1-5. Figure 1-5 2.5-inch HDD Libretto 50CT/70CT Maintenance Manual 1-9 The Libretto 50CT computer supports a 815MB HDD. ∗The Libretto 70CT computer supports a 1.58GB HDD.
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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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... space for optional keyboard configurations. See Appendix D for a mouse. 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
... space for optional keyboard configurations. See Appendix D for a mouse. 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