User Guide
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.... CAUTION: "Caution" indicates the existence of the computer may result in the field isolate and replace faulty Field Replaceable Units (FRUs). q Be sure to perform hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT. Each of these messages will be sure to the Libretto 70CT is specific to use only the same model battery or an equivalent battery recommended by an...
.... CAUTION: "Caution" indicates the existence of the computer may result in the field isolate and replace faulty Field Replaceable Units (FRUs). q Be sure to perform hardware service maintenance for the Toshiba Personal Computer Libretto 50CT/70CT. Each of these messages will be sure to the Libretto 70CT is specific to use only the same model battery or an equivalent battery recommended by an...
User Guide
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... Hard Disk Test Detail Status 3-35 3.18 Hard Disk Format 3-37 3.19 Head Cleaning ...3-41 3.20 Log Utilities...3-42 3.21 Running Test ...3-44 3.22 Floppy Disk Drive Utilities 3-45 3.23 System Configuration 3-49 3.24 SETUP ...3-50 Chapter 4 Replacement Procedures 4.1 Overview ...4-1 4.2 Battery Pack ...4-6 4.3 Optional PC Card...4-8 4.4 Hard Disk Drive (HDD 4-10 4.5 Optional Memory Module 4-12 4.6 Keyboard ...4-14 4.7 Display Assembly 4-16 4.8 RTC Battery ...4-19 4.9 System Board ...4-20 4.10 Display Mask ...4-21 4.11 FL Inverter Board 4-23 4.12 LCD Module ...4-25 4.13 Power Switch Board...
... Hard Disk Test Detail Status 3-35 3.18 Hard Disk Format 3-37 3.19 Head Cleaning ...3-41 3.20 Log Utilities...3-42 3.21 Running Test ...3-44 3.22 Floppy Disk Drive Utilities 3-45 3.23 System Configuration 3-49 3.24 SETUP ...3-50 Chapter 4 Replacement Procedures 4.1 Overview ...4-1 4.2 Battery Pack ...4-6 4.3 Optional PC Card...4-8 4.4 Hard Disk Drive (HDD 4-10 4.5 Optional Memory Module 4-12 4.6 Keyboard ...4-14 4.7 Display Assembly 4-16 4.8 RTC Battery ...4-19 4.9 System Board ...4-20 4.10 Display Mask ...4-21 4.11 FL Inverter Board 4-23 4.12 LCD Module ...4-25 4.13 Power Switch Board...
User Guide
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... 102-key enhanced keyboard. and software that enables a display of 1.58GB. 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 fast numeric data entry and cursor/page control; Libretto 50CT/70CT Maintenance Manual 1-1 q Display A 6.1-inch, Thin Film Transistor (TFT) color Liquid Crystal Display (LCD), that supports...
... 102-key enhanced keyboard. and software that enables a display of 1.58GB. 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 fast numeric data entry and cursor/page control; Libretto 50CT/70CT Maintenance Manual 1-1 q Display A 6.1-inch, Thin Film Transistor (TFT) color Liquid Crystal Display (LCD), that supports...
User Guide
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... Battery icon Battery icon Power supply status Lights orange Quick charge *1 Lights green Battery has a full charge and the AC adapter is connected Blinks orange (even intervals) The battery level becomes low while operating the computer on battery power*2 Doesn't light Any condition other than those above . Libretto 50CT/70CT Maintenance Manual 2-5 Table 2-2 DC IN icon DC IN icon Power supply status Lights green DC power is displayed. 2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting 2.3 Power Supply Troubleshooting The power supply controls many functions...
... Battery icon Battery icon Power supply status Lights orange Quick charge *1 Lights green Battery has a full charge and the AC adapter is connected Blinks orange (even intervals) The battery level becomes low while operating the computer on battery power*2 Doesn't light Any condition other than those above . Libretto 50CT/70CT Maintenance Manual 2-5 Table 2-2 DC IN icon DC IN icon Power supply status Lights green DC power is displayed. 2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting 2.3 Power Supply Troubleshooting The power supply controls many functions...
User Guide
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... IN icon blinks orange. 2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures To check the power supply status, install a battery pack and connect an AC adapter. q Start Off for 2 seconds q Error code (8 bit) "1" On for one second "0" On for half second Interval between data bits Off for the Libretto 50CT/70CT. Check 3 If the Battery icon does not light orange or green, go to Procedure 2. CAUTION: Use only an...
... IN icon blinks orange. 2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures To check the power supply status, install a battery pack and connect an AC adapter. q Start Off for 2 seconds q Error code (8 bit) "1" On for one second "0" On for half second Interval between data bits Off for the Libretto 50CT/70CT. Check 3 If the Battery icon does not light orange or green, go to Procedure 2. CAUTION: Use only an...
User Guide
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... the limit 31h B3V voltage is under the limit 33h B3V does not start up when the power supply is turned on q Power supply microcontroller Error code Meaning 50h Firmware or program error q CPU environmental condition Error code Meaning 80h CPU temperature is outside the allowable range 88h CPU overheat (The CPU heat sensor has detected overheating and has automatically shut down) Libretto 50CT/70CT Maintenance Manual 2-7
... the limit 31h B3V voltage is under the limit 33h B3V does not start up when the power supply is turned on q Power supply microcontroller Error code Meaning 50h Firmware or program error q CPU environmental condition Error code Meaning 80h CPU temperature is outside the allowable range 88h CPU overheat (The CPU heat sensor has detected overheating and has automatically shut down) Libretto 50CT/70CT Maintenance Manual 2-7
User Guide
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... Reliability Test (IRT) installed in the RTC memory (CMOS type memory) is properly loaded, go to Procedure 2. Then press [F1] key ...... (c) *** Bad configuration *** Check system. Then press [F1] key ...... (e) *** Bad time function *** Check system. Then press [F1] key ...... 2-10 Libretto 50CT/70CT Maintenance Manual The procedures described in this section are: Procedure 1: Message Check Procedure 2: Printer Port LED Check in Boot Mode Procedure 3: Printer Port LED Check in Hibernation...
... Reliability Test (IRT) installed in the RTC memory (CMOS type memory) is properly loaded, go to Procedure 2. Then press [F1] key ...... (c) *** Bad configuration *** Check system. Then press [F1] key ...... (e) *** Bad time function *** Check system. Then press [F1] key ...... 2-10 Libretto 50CT/70CT Maintenance Manual The procedures described in this section are: Procedure 1: Message Check Procedure 2: Printer Port LED Check in Boot Mode Procedure 3: Printer Port LED Check in Hibernation...
User Guide
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...-digit binary value for boot mode. If the final LED status matches any of the computer. 4. 2.4 System Board Troubleshooting 2 Troubleshooting Procedures (17) PIC #2 ERROR (18) KB ERROR (19) HDC ERROR (20) HDD #0 ERR2OR (21) HDD #1 ERROR (22) NO FDD ERROR (23) FDC ERROR (24) TIMER INTERRUPT ERROR (25) RTC UPDATE ERROR Procedure 2 Printer Port LED Check in Table 2-3, do Check 1. 2-12 Libretto 50CT/70CT Maintenance Manual If the final LED status is FFh...
...-digit binary value for boot mode. If the final LED status matches any of the computer. 4. 2.4 System Board Troubleshooting 2 Troubleshooting Procedures (17) PIC #2 ERROR (18) KB ERROR (19) HDC ERROR (20) HDD #0 ERR2OR (21) HDD #1 ERROR (22) NO FDD ERROR (23) FDC ERROR (24) TIMER INTERRUPT ERROR (25) RTC UPDATE ERROR Procedure 2 Printer Port LED Check in Table 2-3, do Check 1. 2-12 Libretto 50CT/70CT Maintenance Manual If the final LED status is FFh...
User Guide
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... Initialization of memory configuration SM-RAM check ROM/RAM copy Selftest skip check Read PS Information Initialization of internal VGA First 64 KB memory test System memory clear System clear Interrupt vector initialization PIC initialization Display initialization System memory test Extended memory test DMA page register test DMAC test Message - - MEMORY REFRESH ERROR TIMER CH.2 OUT ERROR CMOS CHECKSUM ERROR CMOS BAD BATTERY ERROR - - - - - - For example, when the printer port LED displays 1F and...
... Initialization of memory configuration SM-RAM check ROM/RAM copy Selftest skip check Read PS Information Initialization of internal VGA First 64 KB memory test System memory clear System clear Interrupt vector initialization PIC initialization Display initialization System memory test Extended memory test DMA page register test DMAC test Message - - MEMORY REFRESH ERROR TIMER CH.2 OUT ERROR CMOS CHECKSUM ERROR CMOS BAD BATTERY ERROR - - - - - - For example, when the printer port LED displays 1F and...
User Guide
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... the Keyboard Troubleshooting procedures in Section 2.7 Check 3 If error code 55H displays, go to the HDD Troubleshooting Procedures in Section 2.6. SIO initialization - Boot load - Check 4 If error code 60H displays, go to the FDD Troubleshooting Procedures in Hibernation Mode The printer port LED displays the IRT status and test status by turning lights on and off as an eight-digit binary value for Hibernation mode. 2-14 Libretto 50CT/70CT Maintenance Manual Setup boot check...
... the Keyboard Troubleshooting procedures in Section 2.7 Check 3 If error code 55H displays, go to the HDD Troubleshooting Procedures in Section 2.6. SIO initialization - Boot load - Check 4 If error code 60H displays, go to the FDD Troubleshooting Procedures in Hibernation Mode The printer port LED displays the IRT status and test status by turning lights on and off as an eight-digit binary value for Hibernation mode. 2-14 Libretto 50CT/70CT Maintenance Manual Setup boot check...
User Guide
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... Libretto 50CT/70CT Maintenance Manual Check 4 Remove the system disk from the FDISK menu. Transfer the contents of the hard disk will be used only once.) If it exists, use it to back up the preinstalled software, then use the Backup utility in the System Tools Folder. (This tool can , go to Procedure 2. Check 2 Type FDISK and press Enter. Otherwise, the HDD is listed, go to create a DOS partition on...
... Libretto 50CT/70CT Maintenance Manual Check 4 Remove the system disk from the FDISK menu. Transfer the contents of the hard disk will be used only once.) If it exists, use it to back up the preinstalled software, then use the Backup utility in the System Tools Folder. (This tool can , go to Procedure 2. Check 2 Type FDISK and press Enter. Otherwise, the HDD is listed, go to create a DOS partition on...
User Guide
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... Error Codes and Error Status Names 3-32 3.17 Hard Disk Test Detail Status 3-35 3.18 Hard Disk Format...3-37 3.18.1 Function Description 3-37 3.18.2 Operations 3-38 3.19 Head Cleaning ...3-41 3.19.1 Function Description 3-41 3.19.2 Operations 3-41 3.20 Log Utilities...3-42 3.20.1 Function Description 3-42 3.20.2 Operations 3-42 3.21 Running Test ...3-44 3.21.1 Function Description 3-44 3.21.2 Operations 3-44 3.22 Floppy Disk Drive Utilities 3-45 3.22.1 Function Description 3-45 Libretto 50CT/70CT Maintenance Manual...
... Error Codes and Error Status Names 3-32 3.17 Hard Disk Test Detail Status 3-35 3.18 Hard Disk Format...3-37 3.18.1 Function Description 3-37 3.18.2 Operations 3-38 3.19 Head Cleaning ...3-41 3.19.1 Function Description 3-41 3.19.2 Operations 3-41 3.20 Log Utilities...3-42 3.20.1 Function Description 3-42 3.20.2 Operations 3-42 3.21 Running Test ...3-44 3.21.1 Function Description 3-44 3.21.2 Operations 3-44 3.22 Floppy Disk Drive Utilities 3-45 3.22.1 Function Description 3-45 Libretto 50CT/70CT Maintenance Manual...
User Guide
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... SETUP...3-50 3.24.1 Function Description 3-50 3.24.2 Accessing the SETUP Program 3-51 3.24.3 Moving Within the SETUP Menu and Changing Values 3-52 3.24.4 Accepting Changes and Exiting the SETUP Window 3-52 3.24.5 The Factory Preset Configuration 3-52 3.24.6 SETUP Options 3-53 Tables Table 3-1 Subtest names (1/2 3-7 Table 3-2 Error codes and error status names (1/3 3-32 Table 3-3 Hard disk controller status register contents 3-35 Table 3-4 Error register contents 3-36 Table 3-5 Hard disk formatting sequence 3-37 Libretto 50CT/70CT Maintenance Manual...
... SETUP...3-50 3.24.1 Function Description 3-50 3.24.2 Accessing the SETUP Program 3-51 3.24.3 Moving Within the SETUP Menu and Changing Values 3-52 3.24.4 Accepting Changes and Exiting the SETUP Window 3-52 3.24.5 The Factory Preset Configuration 3-52 3.24.6 SETUP Options 3-53 Tables Table 3-1 Subtest names (1/2 3-7 Table 3-2 Error codes and error status names (1/3 3-32 Table 3-3 Hard disk controller status register contents 3-35 Table 3-4 Error register contents 3-36 Table 3-5 Hard disk formatting sequence 3-37 Libretto 50CT/70CT Maintenance Manual...
User Guide
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... this subtest, the keyboard layout is drawn on the screen changes to the computer before the power is connected. 3-12 Libretto 50CT/70CT Maintenance Manual 3.6 Keyboard Test 3 Tests and Diagnostics 3.6 Keyboard Test To execute the Keyboard Test select 3 from the Diagnostic Test Menu, press Enter and follow the directions on . Subtest 01 Pressed key display NOTE: The Num Lock and the Overlay mode must be off to...
... this subtest, the keyboard layout is drawn on the screen changes to the computer before the power is connected. 3-12 Libretto 50CT/70CT Maintenance Manual 3.6 Keyboard Test 3 Tests and Diagnostics 3.6 Keyboard Test To execute the Keyboard Test select 3 from the Diagnostic Test Menu, press Enter and follow the directions on . Subtest 01 Pressed key display NOTE: The Num Lock and the Overlay mode must be off to...
User Guide
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... floppy disk test, prepare a formatted work disk into the FDD. Remove the Diagnostics Disk and insert a work disk. Read specified address 99 - To execute a test, enter an appropriate response to be tested, and press Enter. Test drive number select (1:FDD#1,2:FDD#2,0:FDD1&2) ? 2. Simply pressing Enter sets the start track (Enter:0/dd:00-79) ? 4. Test start track to DIAGNOSTIC TEST MENU Enter : Esc : Select items Specify Exit Libretto 50CT/70CT Maintenance Manual 3-17...
... floppy disk test, prepare a formatted work disk into the FDD. Remove the Diagnostics Disk and insert a work disk. Read specified address 99 - To execute a test, enter an appropriate response to be tested, and press Enter. Test drive number select (1:FDD#1,2:FDD#2,0:FDD1&2) ? 2. Simply pressing Enter sets the start track (Enter:0/dd:00-79) ? 4. Test start track to DIAGNOSTIC TEST MENU Enter : Esc : Select items Specify Exit Libretto 50CT/70CT Maintenance Manual 3-17...
User Guide
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... Error ROM Checksum Error Parity Error Protected Mode Not Changed Memory Read/Write Error Cache Memory Error Mouse Interface Error IPS Interface Error Interface Error Retransmit Error Mouse Handler Not Supported PS/2 Mouse & IPS Not Supported Bad Command Address Mark Not Found Write Protected Record Not Found Media Removed DMA Overrun Error DMA Boundary Error CRC Error FDC Error Seek Error FDD Not In Drive Error Time Out Error Write Buffer Error Time Out Fault Select Line Out of Paper Power...
... Error ROM Checksum Error Parity Error Protected Mode Not Changed Memory Read/Write Error Cache Memory Error Mouse Interface Error IPS Interface Error Interface Error Retransmit Error Mouse Handler Not Supported PS/2 Mouse & IPS Not Supported Bad Command Address Mark Not Found Write Protected Record Not Found Media Removed DMA Overrun Error DMA Boundary Error CRC Error FDC Error Seek Error FDD Not In Drive Error Time Out Error Write Buffer Error Time Out Fault Select Line Out of Paper Power...
User Guide
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... Tone (Card Modem) Bad Command Error Address Mark Not Found Record Not Found HDC Not Reset Error Drive Not Initialized HDC Overrun (DRQ) DMA Boundary Error Bad Sector Bad Track Error ECC Error ECC Recover Enabled HDC Error Seek Error Time Out Error Drive Not Ready Undefined Error Write Fault Status Error Access Time Out Error No Co-Processor Control Word Error Status Word Error Bus Error Addition Error Multiply Error Libretto 50CT/70CT Maintenance Manual 3-33
... Tone (Card Modem) Bad Command Error Address Mark Not Found Record Not Found HDC Not Reset Error Drive Not Initialized HDC Overrun (DRQ) DMA Boundary Error Bad Sector Bad Track Error ECC Error ECC Recover Enabled HDC Error Seek Error Time Out Error Drive Not Ready Undefined Error Write Fault Status Error Access Time Out Error No Co-Processor Control Word Error Status Word Error Bus Error Addition Error Multiply Error Libretto 50CT/70CT Maintenance Manual 3-33
User Guide
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...+F5. Pressing Fn+F5 changes the display setting as follows: internal LCD, to simultaneous, to select the display when booting up. Disabled Disables the LCD display stretch feature. (Default) 3-54 Libretto 50CT/70CT Maintenance Manual 3.24 SETUP 3 Tests and Diagnostics (b) LCD Display Colors Used to select the color palette of the TFT display when the LCD mode is set to Color. 222K(Default), 4096 and 16M(256k) colors (c) Power On Display Used to external CRT. (d) VGA Segment Address...
...+F5. Pressing Fn+F5 changes the display setting as follows: internal LCD, to simultaneous, to select the display when booting up. Disabled Disables the LCD display stretch feature. (Default) 3-54 Libretto 50CT/70CT Maintenance Manual 3.24 SETUP 3 Tests and Diagnostics (b) LCD Display Colors Used to select the color palette of the TFT display when the LCD mode is set to Color. 222K(Default), 4096 and 16M(256k) colors (c) Power On Display Used to external CRT. (d) VGA Segment Address...
User Guide
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Always start by removing the battery pack, then follow the lines on the chart to determine which FRUs need to be necessary to remove all the FRUs in order to replace one you must remove next in order to operate improperly. It may not be removed in order to disassemble the computer and replace Field Replaceable Units (FRUs). Libretto 50CT/70CT Maintenance Manual 4-1 The chart below is a guide to which FRU you think is causing the computer to remove others. 4 Replacement Procedures 4.1 Overview 4 4.1 Overview This section explains how to repair the one .
Always start by removing the battery pack, then follow the lines on the chart to determine which FRUs need to be necessary to remove all the FRUs in order to replace one you must remove next in order to operate improperly. It may not be removed in order to disassemble the computer and replace Field Replaceable Units (FRUs). Libretto 50CT/70CT Maintenance Manual 4-1 The chart below is a guide to which FRU you think is causing the computer to remove others. 4 Replacement Procedures 4.1 Overview 4 4.1 Overview This section explains how to repair the one .
Memory Installation Guide
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... replace the keyboard retaining strip. 10. Remove the screw with 16MB memory soldered. Do not over the connector on . All OEM's names, trademarks and part numbers are original equipment parts. Remove the battery from the unit. Under no way imply that you may have just removed the retaining strip. Manual No. 1005205 • Release 12/97, Rev. Viking Memory INSTALLATION GUIDE TOSHIBA® Libretto 50CT & 70CT 6. Remove...
... replace the keyboard retaining strip. 10. Remove the screw with 16MB memory soldered. Do not over the connector on . All OEM's names, trademarks and part numbers are original equipment parts. Remove the battery from the unit. Under no way imply that you may have just removed the retaining strip. Manual No. 1005205 • Release 12/97, Rev. Viking Memory INSTALLATION GUIDE TOSHIBA® Libretto 50CT & 70CT 6. Remove...
