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... 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 Libretto 50CT/70CT Maintenance Manual iii
... 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 Libretto 50CT/70CT Maintenance Manual iii
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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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...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 q Standard RAM • 16 MB, eight 1M x 16-bit EDO DRAM chips • 3.3 volt operation • No parity bit • Access time... (Flash EEPROM) • 256 KB, one 256K x 8-bit chip − 64 KB are used for system BIOS − 40 KB are used for VGA BIOS − 152 KB are reserved • Access time 120 ns • Data transfer is 8-bit width q Expansion memory One expansion memory slot is used. ...
...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 q Standard RAM • 16 MB, eight 1M x 16-bit EDO DRAM chips • 3.3 volt operation • No parity bit • Access time... (Flash EEPROM) • 256 KB, one 256K x 8-bit chip − 64 KB are used for system BIOS − 40 KB are used for VGA BIOS − 152 KB are reserved • Access time 120 ns • Data transfer is 8-bit width q Expansion memory One expansion memory slot is used. ...
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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... Address latch • Hibernation control • Ring wake up control • PC card control − Memory card control − I/O card control • BIOS-ROM interface • Infrared port control • Sound control 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 1.2 System Unit Block Diagram 1 Hardware Overview q System Controller Gate Array This gate array has the following functions: • Two... Address latch • Hibernation control • Ring wake up control • PC card control − Memory card control − I/O card control • BIOS-ROM interface • Infrared port control • Sound control q Keyboard Controller (KBC) This KBC includes: the keyboard scan controller and keyboard interface controller;
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... icon and the speaker. 4. Table 1-6 Power supply board output rating Use CPU, RAM, GA, VGA, VRAM GA, BIOS ROM, KBC, PC card Name B3V VCC DC voltage (V) +3.3 +12.0 Regulation tolerance (%) ±5 ±5 1-14 Libretto 50CT/70CT Maintenance Manual Detects DC output and circuit malfunctions. 3. Provides more accurate detection of voltages to the computer...
... icon and the speaker. 4. Table 1-6 Power supply board output rating Use CPU, RAM, GA, VGA, VRAM GA, BIOS ROM, KBC, PC card Name B3V VCC DC voltage (V) +3.3 +12.0 Regulation tolerance (%) ±5 ±5 1-14 Libretto 50CT/70CT Maintenance Manual Detects DC output and circuit malfunctions. 3. Provides more accurate detection of voltages to the computer...
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...Toshiba MS-DOS or Toshiba Windows 95 is shown on the display, perform Check 1. Check 1 If one of the following error messages displays on the screen, press the F1 key as instructed. Then press [F1] key ...... (e) *** Bad time function *** Check system. Then press [F1] key ...... 2-10 Libretto 50CT...describes how to determine if the system board is turned on, the system performs the Initial Reliability Test (IRT) installed in the BIOS ROM. The procedures described in this section are: Procedure 1: Message Check Procedure 2: Printer Port LED Check in Boot Mode Procedure ...
...Toshiba MS-DOS or Toshiba Windows 95 is shown on the display, perform Check 1. Check 1 If one of the following error messages displays on the screen, press the F1 key as instructed. Then press [F1] key ...... (e) *** Bad time function *** Check system. Then press [F1] key ...... 2-10 Libretto 50CT...describes how to determine if the system board is turned on, the system performs the Initial Reliability Test (IRT) installed in the BIOS ROM. The procedures described in this section are: Procedure 1: Message Check Procedure 2: Printer Port LED Check in Boot Mode Procedure ...
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Convert the status from binary to perform these tests. Refer to Chapter 3, Tests and Diagnostics, for more information on how to hexadecimal notation. 6. Libretto 50CT/70CT Maintenance Manual 2-15 Plug the printer port LED into the computer's parallel port. 3. System test (1) Memory test (2) Printer test (6) ASYNC test ... any of the computer. 5. Table 2-4 Printer port LED Hibernation mode error status Error status F1H F2H F7H E1H Meaning of status System BIOS RAM checksum error Optional ROM or Optional Card (CGA,MDA) is in Table 2-4, go to right as you face the back of the...
Convert the status from binary to perform these tests. Refer to Chapter 3, Tests and Diagnostics, for more information on how to hexadecimal notation. 6. Libretto 50CT/70CT Maintenance Manual 2-15 Plug the printer port LED into the computer's parallel port. 3. System test (1) Memory test (2) Printer test (6) ASYNC test ... any of the computer. 5. Table 2-4 Printer port LED Hibernation mode error status Error status F1H F2H F7H E1H Meaning of status System BIOS RAM checksum error Optional ROM or Optional Card (CGA,MDA) is in Table 2-4, go to right as you face the back of the...
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The System Test contains one test that tests the system. 3 Tests and Diagnostics 3.4 System Test 3.4 System Test To execute the System Test select 1 from the Diagnostic Test Menu, press Enter and follow the directions on the system board. Subtest 01 ROM checksum This subtest executes a checksum test of the BIOS ROM on the screen. Move the highlight bar to the subtest you want to execute and press Enter. Libretto 50CT/70CT Maintenance Manual 3-9
The System Test contains one test that tests the system. 3 Tests and Diagnostics 3.4 System Test 3.4 System Test To execute the System Test select 1 from the Diagnostic Test Menu, press Enter and follow the directions on the system board. Subtest 01 ROM checksum This subtest executes a checksum test of the BIOS ROM on the screen. Move the highlight bar to the subtest you want to execute and press Enter. Libretto 50CT/70CT Maintenance Manual 3-9
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Number of printer ports 10. Libretto 50CT/70CT Maintenance Manual 3-49 3 Tests and Diagnostics 3 3.23 System Configuration 3.23 System Configuration 3.23.1 Function Description The System Configuration program contains the following system configuration: ... CLOCK = P75MHz Press [Enter] Key Press Enter to return to display the following configuration information for the computer: 1. Boot ROM version 3. Extended memory size 11. BIOS ROM VERSION = VX.XX - Number of hard disk drives 9. BIOS ROM version 2. XXXMB EXTENDED MEMORY - 1 MATH CO-PROCESSOR -
Number of printer ports 10. Libretto 50CT/70CT Maintenance Manual 3-49 3 Tests and Diagnostics 3 3.23 System Configuration 3.23 System Configuration 3.23.1 Function Description The System Configuration program contains the following system configuration: ... CLOCK = P75MHz Press [Enter] Key Press Enter to return to display the following configuration information for the computer: 1. Boot ROM version 3. Extended memory size 11. BIOS ROM VERSION = VX.XX - Number of hard disk drives 9. BIOS ROM version 2. XXXMB EXTENDED MEMORY - 1 MATH CO-PROCESSOR -
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... 5. Others (a) Power-up Mode (b) CPU Cache (c) System Auto Off (d) Alarm Volume (e) System Beep (f) Panel Power On/Off (g) Alarm Power On (h) Pointing Devices (i) Boot Priority 3-50 Libretto 50CT/70CT Maintenance Manual Display (a) Display Adapter (b) LCD Display Colors (c) Power On Display (d) VGA Segment Address (e) Text Mode Stretch 3. 3.24 SETUP 3.24 SETUP 3 Tests and Diagnostics...
... 5. Others (a) Power-up Mode (b) CPU Cache (c) System Auto Off (d) Alarm Volume (e) System Beep (f) Panel Power On/Off (g) Alarm Power On (h) Pointing Devices (i) Boot Priority 3-50 Libretto 50CT/70CT Maintenance Manual Display (a) Display Adapter (b) LCD Display Colors (c) Power On Display (d) VGA Segment Address (e) Text Mode Stretch 3. 3.24 SETUP 3.24 SETUP 3 Tests and Diagnostics...
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...groups. Display These options configure the computer's display. (a) Display Adapter Enables or disables the internal controller for the VGA internal display. Libretto 50CT/70CT Maintenance Manual 3-53 Memory These options configure the computer's memory. 3 Tests and Diagnostics 3.24 SETUP NOTE: When you execute ... automatically calculated by the computer. (c) Extended Displays the amount of memory beyond base memory that the computer can access. (d) Shadow BIOS ROM Displays 256 KB, the amount of RAM used to copy ROM files. 2. VGA compatible Enables the internal VGA controller. (...
...groups. Display These options configure the computer's display. (a) Display Adapter Enables or disables the internal controller for the VGA internal display. Libretto 50CT/70CT Maintenance Manual 3-53 Memory These options configure the computer's memory. 3 Tests and Diagnostics 3.24 SETUP NOTE: When you execute ... automatically calculated by the computer. (c) Extended Displays the amount of memory beyond base memory that the computer can access. (d) Shadow BIOS ROM Displays 256 KB, the amount of RAM used to copy ROM files. 2. VGA compatible Enables the internal VGA controller. (...
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... Diagrams E-1 E.1 Parallel Port Wraparound Connector E-1 E.2 Serial Port Wraparound Connector E-1 E.3 Serial Port Direct Cable (9-Pin to 9-Pin E-2 E.4 Serial Port Direct Cable (9-Pin to 25-Pin E-2 Appendix F BIOS Rewrite Procedures F-1 Appendix G Reliability...G-1 Figures Figure B-1 System board layout (front B-1 Figure B-2 System board layout (back B-2 Libretto 50CT/70CT Maintenance Manual App-iii
... Diagrams E-1 E.1 Parallel Port Wraparound Connector E-1 E.2 Serial Port Wraparound Connector E-1 E.3 Serial Port Direct Cable (9-Pin to 9-Pin E-2 E.4 Serial Port Direct Cable (9-Pin to 25-Pin E-2 Appendix F BIOS Rewrite Procedures F-1 Appendix G Reliability...G-1 Figures Figure B-1 System board layout (front B-1 Figure B-2 System board layout (back B-2 Libretto 50CT/70CT Maintenance Manual App-iii
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...cable and any optional memory or PC card. 4. Turn the power on the Libretto 50CT/70CT/70CT. Appendix F Appendix F BIOS Rewrite Procedures This Appendix explains how to rewrite the system BIOS program to restart the system. When the process is completed, eject the diagnostics disk... sounds a beep.) 5. Tools To rewrite the BIOS, you need the following tool: q Diagnostics disk for the computer Rewriting the BIOS 1. Set the system to start the BIOS rewrite program. 6. Libretto 50CT/70CT Maintenance Manual F-1 When the BIOS message displays, insert the diagnostics disk into the FDD...
...cable and any optional memory or PC card. 4. Turn the power on the Libretto 50CT/70CT/70CT. Appendix F Appendix F BIOS Rewrite Procedures This Appendix explains how to rewrite the system BIOS program to restart the system. When the process is completed, eject the diagnostics disk... sounds a beep.) 5. Tools To rewrite the BIOS, you need the following tool: q Diagnostics disk for the computer Rewriting the BIOS 1. Set the system to start the BIOS rewrite program. 6. Libretto 50CT/70CT Maintenance Manual F-1 When the BIOS message displays, insert the diagnostics disk into the FDD...