User Guide
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...of Creative Technology Ltd. All rights reserved. Sound Blaster and Pro are registered trademarks of Centronics Data Computer Corporation. Libretto 50CT/70CT Maintenance Manual i Lotus is a registered trademark of Microsoft Corporation. Centronics is a registered trademark of IBM ...Development Corporation. UNIX is a trademark of Novell, Inc. All other properties are registered trademarks of Intel Corporation. Toshiba Libretto 50CT/70CT Maintenance Manual Third edition February 1998 Disclaimer The information contained in this manual is assumed with the furnishing,...
...of Creative Technology Ltd. All rights reserved. Sound Blaster and Pro are registered trademarks of Centronics Data Computer Corporation. Libretto 50CT/70CT Maintenance Manual i Lotus is a registered trademark of Microsoft Corporation. Centronics is a registered trademark of IBM ...Development Corporation. UNIX is a trademark of Novell, Inc. All other properties are registered trademarks of Intel Corporation. Toshiba Libretto 50CT/70CT Maintenance Manual Third edition February 1998 Disclaimer The information contained in this manual is assumed with the furnishing,...
User Guide
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... securely with the correct screwdriver. Improper repair of a hazard that the following safety precautions are intended to the Libretto 70CT is not observed. q Be sure to perform hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT. The procedures described in this manual since its original release. WARNING: "Warning" indicates the existence of...
... securely with the correct screwdriver. Improper repair of a hazard that the following safety precautions are intended to the Libretto 70CT is not observed. q Be sure to perform hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT. The procedures described in this manual since its original release. WARNING: "Warning" indicates the existence of...
User Guide
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... each FRU. 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 Libretto 50CT/70CT Maintenance Manual iii Chapter 4 Replacement Procedures describes the removal and replacement of the FRUs.
... each FRU. 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 Libretto 50CT/70CT Maintenance Manual iii Chapter 4 Replacement Procedures describes the removal and replacement of the FRUs.
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Key operation Some operations require you to type in is shown in the boldface type below : Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual If three keys are instructed to simultaneously use two or more keys. User input Text that displays on the keyboard is presented ... are enclosed in the 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.
Key operation Some operations require you to type in is shown in the boldface type below : Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual If three keys are instructed to simultaneously use two or more keys. User input Text that displays on the keyboard is presented ... are enclosed in the 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.
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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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... enable an external monitor to 16M colors at a clock speed of up the Real Time Clock and CMOS memory. 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 keypad overlay for...
... enable an external monitor to 16M colors at a clock speed of up the Real Time Clock and CMOS memory. 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 keypad overlay for...
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... A Sound Blaster Pro compatible, 16-bit sound system enables the computer to the PC card slot and accommodates both 2HD (1.44MB) and 2DD (720KB) disks. 1-2 Libretto 50CT/70CT Maintenance Manual q External monitor port The port is 16550A equivalent. q Infrared port An Infrared Data Association (IrDA) 1.0 standard infrared port, which enables cableless 115...
... A Sound Blaster Pro compatible, 16-bit sound system enables the computer to the PC card slot and accommodates both 2HD (1.44MB) and 2DD (720KB) disks. 1-2 Libretto 50CT/70CT Maintenance Manual q External monitor port The port is 16550A equivalent. q Infrared port An Infrared Data Association (IrDA) 1.0 standard infrared port, which enables cableless 115...
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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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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 for VGA BIOS − 152 KB are reserved • Access...; Access time 70 ns • Data transfer is 64-bit width q Video Controller Chips & Technologies F65550 is composed 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 used for VGA BIOS − 152 KB are reserved • Access...; Access time 70 ns • Data transfer is 64-bit width q Video Controller Chips & Technologies F65550 is composed 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. ∗...
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and controls: the internal keyboard, external keyboard, IPS and PS/2 mouse. 1-6 Libretto 50CT/70CT Maintenance Manual 1.2 System Unit Block Diagram 1 Hardware Overview q System Controller Gate Array This gate array has the following functions: • Two PICs: 82C59 equivalent &#...
and controls: the internal keyboard, external keyboard, IPS and PS/2 mouse. 1-6 Libretto 50CT/70CT Maintenance Manual 1.2 System Unit Block Diagram 1 Hardware Overview q System Controller Gate Array This gate array has the following functions: • Two PICs: 82C59 equivalent &#...
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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 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 Table 1-1 FDD specifications Item Storage capacity (KB) Unformatted Formatted Number of heads Number of cylinders Access time (ms) Track to the PC...
... 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 Table 1-1 FDD specifications Item Storage capacity (KB) Unformatted Formatted Number of heads Number of cylinders Access time (ms) Track to the PC...
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Figure 1-5 2.5-inch HDD Libretto 50CT/70CT Maintenance Manual 1-9 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. The Libretto 50CT computer supports a 815MB HDD. ∗The Libretto 70CT computer supports a 1.58GB HDD. 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 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. The Libretto 50CT computer supports a 815MB HDD. ∗The Libretto 70CT computer supports a 1.58GB HDD. 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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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 1.4 2.5-inch HDD 1 Hardware Overview The specifications for the HDDs are listed in Table 1-2.
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... optional keyboard configurations. The keyboard is shown in Table 1-3. 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 See Appendix D for a mouse.
... optional keyboard configurations. The keyboard is shown in Table 1-3. 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 See Appendix D for a mouse.
