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...System Board Troubleshooting 2-10 2.5 Floppy Disk Drive (FDD) Troubleshooting 2-17 2.6 Hard Disk Drive (HDD) Troubleshooting 2-19 2.7 Keyboard ...Troubleshooting 2-23 2.8 Pointing Device Troubleshooting 2-24 2.9 Display Troubleshooting 2-25 Chapter 3 Tests and Diagnostics 3.1 The Diagnostic 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...
...System Board Troubleshooting 2-10 2.5 Floppy Disk Drive (FDD) Troubleshooting 2-17 2.6 Hard Disk Drive (HDD) Troubleshooting 2-19 2.7 Keyboard ...Troubleshooting 2-23 2.8 Pointing Device Troubleshooting 2-24 2.9 Display Troubleshooting 2-25 Chapter 3 Tests and Diagnostics 3.1 The Diagnostic 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...
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... 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 4-27 4.14 AccuPoint Board 4-29 4.15 LCD Flexible Cable 4-31 vi Libretto 50CT...
... 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 4-27 4.14 AccuPoint Board 4-29 4.15 LCD Flexible Cable 4-31 vi Libretto 50CT...
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...be installed in Microsoft Windows 95; q Memory Standard 16MB of 1280 x 1024 pixels. q Hard Disk Drive (HDD) The Libretto 50CT has a 2.5-inch HDD with a capacity of 815MB. ∗The Libretto 70CT has a 2.5-inch HDD with MMX technology running at a resolution of Extend Data Out ...at a resolution of 120MHz. 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:...
...be installed in Microsoft Windows 95; q Memory Standard 16MB of 1280 x 1024 pixels. q Hard Disk Drive (HDD) The Libretto 50CT has a 2.5-inch HDD with a capacity of 815MB. ∗The Libretto 70CT has a 2.5-inch HDD with MMX technology running at a resolution of Extend Data Out ...at a resolution of 120MHz. 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:...
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...) Troubleshooting 2-17 Procedure 1 FDD Head Cleaning Check 2-17 Procedure 2 Diagnostic Test Program Execution Check 2-17 Procedure 3 Connector Check and Replacement Check 2-18 2.6 Hard Disk Drive (HDD) Troubleshooting 2-19 Procedure 1 Partition Check 2-19 Procedure 2 Message Check 2-20 Procedure 3 Format Check 2-20 Procedure 4 Diagnostic Test Program Execution Check ... Check 2-24 2.9 Display Troubleshooting 2-25 Procedure 1 Diagnostic Test Program Execution Check 2-25 Procedure 2 Connector Check 2-25 Procedure 3 Replacement Check 2-25 Libretto 50CT/70CT Maintenance Manual 2-iii
...) Troubleshooting 2-17 Procedure 1 FDD Head Cleaning Check 2-17 Procedure 2 Diagnostic Test Program Execution Check 2-17 Procedure 3 Connector Check and Replacement Check 2-18 2.6 Hard Disk Drive (HDD) Troubleshooting 2-19 Procedure 1 Partition Check 2-19 Procedure 2 Message Check 2-20 Procedure 3 Format Check 2-20 Procedure 4 Diagnostic Test Program Execution Check ... Check 2-24 2.9 Display Troubleshooting 2-25 Procedure 1 Diagnostic Test Program Execution Check 2-25 Procedure 2 Connector Check 2-25 Procedure 3 Replacement Check 2-25 Libretto 50CT/70CT Maintenance Manual 2-iii
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Figures Figure 2-1 Troubleshooting flowchart (1/2 2-3 Figure 2-2 Printer port LED 2-12 Figure 2-3 Cable connection diagram 2-16 Tables Table 2-1 Battery icon ...2-5 Table 2-2 DC IN icon...2-5 Table 2-3 Printer port LED boot mode status (1/2 2-13 Table 2-4 Printer port LED Hibernation mode error status 2-15 Table 2-5 FDD error codes and statuses 2-17 Table 2-6 Hard disk drive error codes and statuses 2-22 2-iv Libretto 50CT/70CT Maintenance Manual
Figures Figure 2-1 Troubleshooting flowchart (1/2 2-3 Figure 2-2 Printer port LED 2-12 Figure 2-3 Cable connection diagram 2-16 Tables Table 2-1 Battery icon ...2-5 Table 2-2 DC IN icon...2-5 Table 2-3 Printer port LED boot mode status (1/2 2-13 Table 2-4 Printer port LED Hibernation mode error status 2-15 Table 2-5 FDD error codes and statuses 2-17 Table 2-6 Hard disk drive error codes and statuses 2-22 2-iv Libretto 50CT/70CT Maintenance Manual
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Diagnostics disk 2. Phillips screwdriver (2 mm) 3. FDD Libretto 50CT/70CT Maintenance Manual 2-1 The FRUs covered are: • Power Supply • System Board • FL Inverter Board • Floppy Disk Drive • Hard Disk Drive • Keyboard • Pointing Device • Display The Tests and Diagnostics ....COM, FORMAT.COM,FDISK.COM and FDISK.EXE) 4. 2DD or 2HD formatted work disk for floppy disk drive testing 5. PC card wraparound card 11. Toshiba MS-DOS system disk(s) (You must install the following tools are detailed in Chapter 4. Serial port wraparound ...
Diagnostics disk 2. Phillips screwdriver (2 mm) 3. FDD Libretto 50CT/70CT Maintenance Manual 2-1 The FRUs covered are: • Power Supply • System Board • FL Inverter Board • Floppy Disk Drive • Hard Disk Drive • Keyboard • Pointing Device • Display The Tests and Diagnostics ....COM, FORMAT.COM,FDISK.COM and FDISK.EXE) 4. 2DD or 2HD formatted work disk for floppy disk drive testing 5. PC card wraparound card 11. Toshiba MS-DOS system disk(s) (You must install the following tools are detailed in Chapter 4. Serial port wraparound ...
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NonToshiba operating systems can cause the computer to execute. q Make sure all optional equipment is installed on the hard disk. Before going through the flowchart steps, do the following: q Verify with the customer that Toshiba Windows 95 is removed from the computer. q Make sure the floppy disk drive is empty. 2-2 Libretto 50CT/70CT Maintenance Manual 2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart Use the flowchart in figure 2-1 as a guide to determine which troubleshooting procedures to malfunction.
NonToshiba operating systems can cause the computer to execute. q Make sure all optional equipment is installed on the hard disk. Before going through the flowchart steps, do the following: q Verify with the customer that Toshiba Windows 95 is removed from the computer. q Make sure the floppy disk drive is empty. 2-2 Libretto 50CT/70CT Maintenance Manual 2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart Use the flowchart in figure 2-1 as a guide to determine which troubleshooting procedures to malfunction.
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... perform the appropriate troubleshooting procedures as follows: 1. Check the Log Utilities function to isolate the problem. If an error is detected on the hard disk test, do the Hard Disk Drive troubleshooting procedures in Section 2.6. 4. The Running Test program should be intermittent. If an error is detected on the system test, memory test... keyboard test, do the Display troubleshooting procedures in Section 2.7. 5. If an error is detected on the display test, do the Keyboard troubleshooting procedures in Section 2.9. 2-4 Libretto 50CT/70CT Maintenance Manual
... perform the appropriate troubleshooting procedures as follows: 1. Check the Log Utilities function to isolate the problem. If an error is detected on the hard disk test, do the Hard Disk Drive troubleshooting procedures in Section 2.6. 4. The Running Test program should be intermittent. If an error is detected on the system test, memory test... keyboard test, do the Display troubleshooting procedures in Section 2.7. 5. If an error is detected on the display test, do the Keyboard troubleshooting procedures in Section 2.9. 2-4 Libretto 50CT/70CT Maintenance Manual
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... still exists, go to Procedure 2. Otherwise, the HDD is operating normally. 2-20 Libretto 50CT/70CT Maintenance Manual Continue with Procedure 1. Procedure 1: Partition Check Procedure 2: Message Check...the FDISK menu. Procedure 1 Partition Check Insert the Toshiba MS-DOS system disk, turn the computer on drive C. If not, return to the FDISK menu and... Type C: and press Enter. 2.6 Hard Disk Drive (HDD) Troubleshooting 2 Troubleshooting Procedures 2.6 Hard Disk Drive (HDD) Troubleshooting To determine if the hard disk drive is functioning properly, do the procedures below . ...
... still exists, go to Procedure 2. Otherwise, the HDD is operating normally. 2-20 Libretto 50CT/70CT Maintenance Manual Continue with Procedure 1. Procedure 1: Partition Check Procedure 2: Message Check...the FDISK menu. Procedure 1 Partition Check Insert the Toshiba MS-DOS system disk, turn the computer on drive C. If not, return to the FDISK menu and... Type C: and press Enter. 2.6 Hard Disk Drive (HDD) Troubleshooting 2 Troubleshooting Procedures 2.6 Hard Disk Drive (HDD) Troubleshooting To determine if the hard disk drive is functioning properly, do the procedures below . ...
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... is firmly connected to the system board, go to Check 3. Format complete If any key Check 3 Use the Toshiba MS-DOS system disk to install a system program on the display. 2 Troubleshooting Procedures 2.6 Hard Disk Drive (HDD) Troubleshooting Procedure 2 Message Check When the HDD does not function properly, some of the following message displays... not, go to Procedure 3. Check 1 If any key when ready ..... Restart the computer. If the HDD is formatted. Insert system disk in Chapter 4, Replacement Procedures. Libretto 50CT/70CT Maintenance Manual 2-21
... is firmly connected to the system board, go to Check 3. Format complete If any key Check 3 Use the Toshiba MS-DOS system disk to install a system program on the display. 2 Troubleshooting Procedures 2.6 Hard Disk Drive (HDD) Troubleshooting Procedure 2 Message Check When the HDD does not function properly, some of the following message displays... not, go to Procedure 3. Check 1 If any key when ready ..... Restart the computer. If the HDD is formatted. Insert system disk in Chapter 4, Replacement Procedures. Libretto 50CT/70CT Maintenance Manual 2-21
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... format option. Refer to partition the hard disk, using the MS-DOS FORMAT command. 2.6 Hard Disk Drive (HDD) Troubleshooting 2 Troubleshooting Procedures Check 2 Use the Toshiba MS-DOS system disk to Chapter 3, Tests and Diagnostics, for more information about the diagnostics program. If an error is operating properly. 2-22 Libretto 50CT/70CT Maintenance Manual The error codes...
... format option. Refer to partition the hard disk, using the MS-DOS FORMAT command. 2.6 Hard Disk Drive (HDD) Troubleshooting 2 Troubleshooting Procedures Check 2 Use the Toshiba MS-DOS system disk to Chapter 3, Tests and Diagnostics, for more information about the diagnostics program. If an error is operating properly. 2-22 Libretto 50CT/70CT Maintenance Manual The error codes...
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If the HDD is still not functioning properly, do Check 2. Libretto 50CT/70CT Maintenance Manual 2-23 Check 2 Replace the system board with a new one following the instructions in Chapter 4. 2 Troubleshooting Procedures 2.6 Hard Disk Drive (HDD) Troubleshooting Table 2-6 Hard disk drive error codes and statuses Code 01h 02h 03h 04h 06h 08h 09h 10h 20h 40h 60h 80h...
If the HDD is still not functioning properly, do Check 2. Libretto 50CT/70CT Maintenance Manual 2-23 Check 2 Replace the system board with a new one following the instructions in Chapter 4. 2 Troubleshooting Procedures 2.6 Hard Disk Drive (HDD) Troubleshooting Table 2-6 Hard disk drive error codes and statuses Code 01h 02h 03h 04h 06h 08h 09h 10h 20h 40h 60h 80h...
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......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 3.10 Async Test...3-22 3.11 Hard Disk Test ...3-24 3.12 Real Timer Test ...3-27 3.13 NDP Test ...3-29 3.14 Expansion Test ...3-30 3.15 Sound Test ...3-31 3.16 Error Codes and Error...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 3-iii
......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 3.10 Async Test...3-22 3.11 Hard Disk Test ...3-24 3.12 Real Timer Test ...3-27 3.13 NDP Test ...3-29 3.14 Expansion Test ...3-30 3.15 Sound Test ...3-31 3.16 Error Codes and Error...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 3-iii
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REAL TIMER TEST 10 - ERROR RETRY COUNT SET [HDD & FDD] 99 - Function 88 sets the floppy disk drive and hard disk drive error retry count. EXIT TO DIAGNOSTICS MENU Refer to 1, and press Enter. MEMORY TEST 3 - KEYBOARD TEST 4 ... Test and returns to the Diagnostics Menu. 3-4 Libretto 50CT/70CT Maintenance Manual SYSTEM TEST 2 - PRINTER TEST 7 - DISPLAY TEST 5 - ASYNC TEST 8 - SOUND TEST 88 - HARD DISK TEST 9 - The following Diagnostic Test Menu displays: TOSHIBA personal computer xxx DIAGNOSTICS version X.XX (c) copyright TOSHIBA Corp. 19XX DIAGNOSTIC TEST MENU : 1 -...
REAL TIMER TEST 10 - ERROR RETRY COUNT SET [HDD & FDD] 99 - Function 88 sets the floppy disk drive and hard disk drive error retry count. EXIT TO DIAGNOSTICS MENU Refer to 1, and press Enter. MEMORY TEST 3 - KEYBOARD TEST 4 ... Test and returns to the Diagnostics Menu. 3-4 Libretto 50CT/70CT Maintenance Manual SYSTEM TEST 2 - PRINTER TEST 7 - DISPLAY TEST 5 - ASYNC TEST 8 - SOUND TEST 88 - HARD DISK TEST 9 - The following Diagnostic Test Menu displays: TOSHIBA personal computer xxx DIAGNOSTICS version X.XX (c) copyright TOSHIBA Corp. 19XX DIAGNOSTIC TEST MENU : 1 -...
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... no 4. The hard disk test contains ten subtests that test the hard disk drive functions. Check to select whether or not the HDD status is described in the System Tools folder to execute and press Enter. Select yes or no . Answer each subtest. 3-24 Libretto 50CT/70CT Maintenance Manual Refer... up the preinstalled software, then use the Backup utility in Section 3.18. Select the hard disk drive number to be used to execute the test. NOTE: The contents of the hard disk will display when you select the number of the displayed questions with an appropriate response...
... no 4. The hard disk test contains ten subtests that test the hard disk drive functions. Check to select whether or not the HDD status is described in the System Tools folder to execute and press Enter. Select yes or no . Answer each subtest. 3-24 Libretto 50CT/70CT Maintenance Manual Refer... up the preinstalled software, then use the Backup utility in Section 3.18. Select the hard disk drive number to be used to execute the test. NOTE: The contents of the hard disk will display when you select the number of the displayed questions with an appropriate response...
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..., the following message displays: HDC status = XXXXXXXX Detailed information about the hard disk test error displays on the screen by an eight-digit number. Drive is corrected 1 IDX "0" - Correctable data error is not ready for data transfer 2 CORR (Corrected data) "0" - The previous command was terminated with some error Libretto 50CT/70CT Maintenance Manual 3-35
..., the following message displays: HDC status = XXXXXXXX Detailed information about the hard disk test error displays on the screen by an eight-digit number. Drive is corrected 1 IDX "0" - Correctable data error is not ready for data transfer 2 CORR (Corrected data) "0" - The previous command was terminated with some error Libretto 50CT/70CT Maintenance Manual 3-35
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...Tests and Diagnostics Table 3-4 Error register contents Bit Name Description 7 BBK1 (Bad block mark) "0" - Not used 3-36 Libretto 50CT/70CT Maintenance Manual The hard disk could not find track 0 during a recalibrate command (Track 0) "1" - A bad block mark is no ID field ...uncorrectable data error (Uncorrectable) "1" - Not used "1" - Not used "1" - Illegal command error or a drive status error occurs 1 TK00 "0" - The hard disk has found track 0 during a recalibrate command 0 -- Not used 4 IDNF "0" - Uncorrectable data error has been detected 5 --
...Tests and Diagnostics Table 3-4 Error register contents Bit Name Description 7 BBK1 (Bad block mark) "0" - Not used 3-36 Libretto 50CT/70CT Maintenance Manual The hard disk could not find track 0 during a recalibrate command (Track 0) "1" - A bad block mark is no ID field ...uncorrectable data error (Uncorrectable) "1" - Not used "1" - Not used "1" - Illegal command error or a drive status error occurs 1 TK00 "0" - The hard disk has found track 0 during a recalibrate command 0 -- Not used 4 IDNF "0" - Uncorrectable data error has been detected 5 --
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... bad track. Go to select All track FORMAT, which lets you format the entire disk. [All track FORMAT] Drive : #1 = HDD #2 = Non Cylinder : XXXX Head : XX Sector : XX > 3-38 Libretto 50CT/70CT Maintenance Manual Bad track FORMAT This option formats a specified cylinder and track as a good track. Select 2 ...track FORMAT 2 - Refer to the Toshiba MS-DOS manual for bad tracks by reading data to all the tracks on the Diagnostic Menu, to label it as a bad track. 4. Good track FORMAT 3 - Bad track CHECK This option searches the hard disk for more information about using ...
... bad track. Go to select All track FORMAT, which lets you format the entire disk. [All track FORMAT] Drive : #1 = HDD #2 = Non Cylinder : XXXX Head : XX Sector : XX > 3-38 Libretto 50CT/70CT Maintenance Manual Bad track FORMAT This option formats a specified cylinder and track as a good track. Select 2 ...track FORMAT 2 - Refer to the Toshiba MS-DOS manual for bad tracks by reading data to all the tracks on the Diagnostic Menu, to label it as a bad track. 4. Good track FORMAT 3 - Bad track CHECK This option searches the hard disk for more information about using ...
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3 Tests and Diagnostics 3.18 Hard Disk Format The following message displays: Interleave number (1/1 ~ 8) ? (b) Select an interleave number, 1 ~ 8 and press Enter. ...Pressing only Enter selects 1. (c) Bad track register Next, the Bad Track register prompt displays as bad tracks in succession: Drive number select (1:#1,2:#2) ? (a) Select a drive number and press Enter. After entering the bad tracks, press Enter to format. Enter the cylinder and head number in ...-not-found error is detected at the bottom of bad tracks and press Enter. Libretto 50CT/70CT Maintenance Manual 3-39
3 Tests and Diagnostics 3.18 Hard Disk Format The following message displays: Interleave number (1/1 ~ 8) ? (b) Select an interleave number, 1 ~ 8 and press Enter. ...Pressing only Enter selects 1. (c) Bad track register Next, the Bad Track register prompt displays as bad tracks in succession: Drive number select (1:#1,2:#2) ? (a) Select a drive number and press Enter. After entering the bad tracks, press Enter to format. Enter the cylinder and head number in ...-not-found error is detected at the bottom of bad tracks and press Enter. Libretto 50CT/70CT Maintenance Manual 3-39
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... in the format shown below . Interleave number (1 / 1 - 8) ? The test is terminated in the screen prompt shown below . Drive number select (1:#1, 2:#2) ? Press [Head number (dd)] ? Press Enter to return to the Hard Disk Format menu. 3-40 Libretto 50CT/70CT Maintenance Manual Press [Cylinder number (dddd)] ? Press Enter to return to reformat the track as a good...
... in the format shown below . Interleave number (1 / 1 - 8) ? The test is terminated in the screen prompt shown below . Drive number select (1:#1, 2:#2) ? Press [Head number (dd)] ? Press Enter to return to the Hard Disk Format menu. 3-40 Libretto 50CT/70CT Maintenance Manual Press [Cylinder number (dddd)] ? Press Enter to return to reformat the track as a good...