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... (+) sign. User input Text that you to type in is shown in the boldface type below : Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual For example: Read Only Memory (ROM) Keys Keys are enclosed in the text to describe, identify, and highlight terms and operating procedures. Conventions This manual uses the... used , hold down the first two and at the same time press Pause (Break). We identify such operations by the keytop symbols separated by the Libretto 50CT, that displays on the keyboard is presented in boldface type.
... (+) sign. User input Text that you to type in is shown in the boldface type below : Format complete System transferred iv Libretto 50CT/70CT Maintenance Manual For example: Read Only Memory (ROM) Keys Keys are enclosed in the text to describe, identify, and highlight terms and operating procedures. Conventions This manual uses the... used , hold down the first two and at the same time press Pause (Break). We identify such operations by the keytop symbols separated by the Libretto 50CT, that displays on the keyboard is presented in boldface type.
User Guide
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... 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/70CT Maintenance Manual v
... 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/70CT Maintenance Manual v
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... 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...
... 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...
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...or 16MB memory kit can be installed in Microsoft Windows 95; Libretto 50CT/70CT Maintenance Manual 1-1 q Memory Standard 16MB of up the Real Time Clock and CMOS memory. q Hard Disk Drive (HDD) The Libretto 50CT has a 2.5-inch HDD with a capacity of 815MB. ∗The Libretto 70CT has ... RTC battery that enables a display of Extend Data Out (EDO) DRAM. 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...
...or 16MB memory kit can be installed in Microsoft Windows 95; Libretto 50CT/70CT Maintenance Manual 1-1 q Memory Standard 16MB of up the Real Time Clock and CMOS memory. q Hard Disk Drive (HDD) The Libretto 50CT has a 2.5-inch HDD with a capacity of 815MB. ∗The Libretto 70CT has ... RTC battery that enables a display of Extend Data Out (EDO) DRAM. 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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... operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache memory. ∗Libretto 70CT: Intel 120 MHz Pentium processor with MMX technology 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 The video controller integrates an LCD/CRT graphics controller, ...
... operates at 2.9/3.3 volts and incorporates the math co-processor and 16 KB cache memory. ∗Libretto 70CT: Intel 120 MHz Pentium processor with MMX technology 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 The video controller integrates an LCD/CRT graphics controller, ...
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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 ...8226; Address latch control − Address conversion − 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: ...
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 ...8226; Address latch control − Address conversion − 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: ...
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... Pack becomes fully charged. 2. Table 1-9 RTC battery charging/data preservation time Item Charging Time Data preservation period (full charge) Time 48 hours About 1 month 1-16 Libretto 50CT/70CT Maintenance Manual 1.8 Batteries 1 Hardware Overview Table 1-8 Time required for quick charge Item Charging time Power off . Table 1-9 shows the charging time and data preservation... automatically changes quick charge to trickle charge. 1.8.4 RTC battery The RTC battery provides power to keep the current date, time, and other setup information in memory while the computer is abnormal.
... Pack becomes fully charged. 2. Table 1-9 RTC battery charging/data preservation time Item Charging Time Data preservation period (full charge) Time 48 hours About 1 month 1-16 Libretto 50CT/70CT Maintenance Manual 1.8 Batteries 1 Hardware Overview Table 1-8 Time required for quick charge Item Charging time Power off . Table 1-9 shows the charging time and data preservation... automatically changes quick charge to trickle charge. 1.8.4 RTC battery The RTC battery provides power to keep the current date, time, and other setup information in memory while the computer is abnormal.
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If an error is detected on the system test, memory test, display test, ASYNC test, printer test, expansion test, sound test, or real timer test do the System Board troubleshooting procedures in Section 2.6. 4. Check the ... in Section 2.7. 5. The Running Test program should be intermittent. If an error is detected on the keyboard test, do the FDD troubleshooting procedures in Section 2.9. 2-4 Libretto 50CT/70CT Maintenance Manual
If an error is detected on the system test, memory test, display test, ASYNC test, printer test, expansion test, sound test, or real timer test do the System Board troubleshooting procedures in Section 2.6. 4. Check the ... in Section 2.7. 5. The Running Test program should be intermittent. If an error is detected on the keyboard test, do the FDD troubleshooting procedures in Section 2.9. 2-4 Libretto 50CT/70CT Maintenance Manual
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... press [F1] key ...... (d) *** Bad memory size *** Check system. Then press [F1] key ...... (g) *** Bad check sum (ROM) *** Check system. The IRT tests each IC on the display, perform Check 1. Then press [F1] key ...... 2-10 Libretto 50CT/70CT Maintenance Manual 2.4 System Board Troubleshooting 2 Troubleshooting ... Checks Procedure 5: Connection Check Procedure 1 Message Check When the power is defective or not functioning properly. q If Toshiba MS-DOS or Toshiba Windows 95 is properly loaded, go to Procedure 2. Press the F1 key as instructed. If any other procedures as...
... press [F1] key ...... (d) *** Bad memory size *** Check system. Then press [F1] key ...... (g) *** Bad check sum (ROM) *** Check system. The IRT tests each IC on the display, perform Check 1. Then press [F1] key ...... 2-10 Libretto 50CT/70CT Maintenance Manual 2.4 System Board Troubleshooting 2 Troubleshooting ... Checks Procedure 5: Connection Check Procedure 1 Message Check When the power is defective or not functioning properly. q If Toshiba MS-DOS or Toshiba Windows 95 is properly loaded, go to Procedure 2. Press the F1 key as instructed. If any other procedures as...
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... (5) CRT ERROR (6) CRTC ERROR (7) KBC ERROR (8) VRAM ERROR (9) SYSTEM MEMORY ERROR (10) SYSTEM MEMORY PARITY ERROR (11) EXTENDED MEMORY ERROR (12) EXTENDED MEMORY PARITY ERROR (13) DMA PAGE REGISTER ERROR (14) DMAC #1 ERROR (15) DMAC #2 ERROR (16) PIC #1 ERROR Libretto 50CT/70CT Maintenance Manual 2-11 If any key. If error message (18) displays, go to the...
... (5) CRT ERROR (6) CRTC ERROR (7) KBC ERROR (8) VRAM ERROR (9) SYSTEM MEMORY ERROR (10) SYSTEM MEMORY PARITY ERROR (11) EXTENDED MEMORY ERROR (12) EXTENDED MEMORY PARITY ERROR (13) DMA PAGE REGISTER ERROR (14) DMAC #1 ERROR (15) DMAC #2 ERROR (16) PIC #1 ERROR Libretto 50CT/70CT Maintenance Manual 2-11 If any key. If error message (18) displays, go to the...
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PIT ERROR - VRAM ERROR SYSTEM MEMORY ERROR SYSTEM MEMORY PARITY ERROR EXTENDED MEMORY ERROR EXTENDED MEMORY PARITY ERROR DMA PAGE REGISTER ERROR DMAC #X ERROR Libretto 50CT/70CT Maintenance Manual 2-13 MEMORY REFRESH ERROR TIMER CH.2 OUT ERROR CMOS CHECKSUM ERROR CMOS BAD BATTERY ERROR - - - - - - ...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 - - In this...
PIT ERROR - VRAM ERROR SYSTEM MEMORY ERROR SYSTEM MEMORY PARITY ERROR EXTENDED MEMORY ERROR EXTENDED MEMORY PARITY ERROR DMA PAGE REGISTER ERROR DMAC #X ERROR Libretto 50CT/70CT Maintenance Manual 2-13 MEMORY REFRESH ERROR TIMER CH.2 OUT ERROR CMOS CHECKSUM ERROR CMOS BAD BATTERY ERROR - - - - - - ...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 - - In this...
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... hexadecimal notation. 6. Read the LED status from the Diagnostic Test Menu. Turn the computer on error (extended memory checksum error) Procedure 4 Diagnostic Test Program Execution and Replacement Checks Execute the following tests from left to Procedure ... error Optional ROM or Optional Card (CGA,MDA) is detected during these steps: 1. System test (1) Memory test (2) Printer test (6) ASYNC test (7) Real Timer test (9) NDP test (10) Expansion test (11) Sound ... Plug the printer port LED into the computer's parallel port. 3. Libretto 50CT/70CT Maintenance Manual 2-15
... hexadecimal notation. 6. Read the LED status from the Diagnostic Test Menu. Turn the computer on error (extended memory checksum error) Procedure 4 Diagnostic Test Program Execution and Replacement Checks Execute the following tests from left to Procedure ... error Optional ROM or Optional Card (CGA,MDA) is detected during these steps: 1. System test (1) Memory test (2) Printer test (6) ASYNC test (7) Real Timer test (9) NDP test (10) Expansion test (11) Sound ... Plug the printer port LED into the computer's parallel port. 3. Libretto 50CT/70CT Maintenance Manual 2-15
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Table of Contents 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 3.10 Async Test...3-22 3.11 Hard Disk Test ...3-24 3.12 ... 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
Table of Contents 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 3.10 Async Test...3-22 3.11 Hard Disk Test ...3-24 3.12 ... 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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... q SETUP The DIAGNOSTIC TEST MENU contains the following functional tests: q SYSTEM TEST q MEMORY TEST q KEYBOARD TEST q DISPLAY TEST q FLOPPY DISK TEST q PRINTER TEST q ASYNC TEST q HARD DISK TEST q REAL TIMER TEST q NDP TEST q EXPANSION TEST q SOUND TEST Libretto 50CT/70CT Maintenance Manual 3-1 The Diagnostics Program is stored on the diagnostics disk. NOTES: To...
... q SETUP The DIAGNOSTIC TEST MENU contains the following functional tests: q SYSTEM TEST q MEMORY TEST q KEYBOARD TEST q DISPLAY TEST q FLOPPY DISK TEST q PRINTER TEST q ASYNC TEST q HARD DISK TEST q REAL TIMER TEST q NDP TEST q EXPANSION TEST q SOUND TEST Libretto 50CT/70CT Maintenance Manual 3-1 The Diagnostics Program is stored on the diagnostics disk. NOTES: To...
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MEMORY TEST 3 - NDP TEST 11 - SYSTEM TEST 2 - HARD DISK TEST 9 - REAL TIMER TEST 10 - ERROR RETRY COUNT SET [HDD & FDD] 99 - Function 99 exits the submenus ... 3 Tests and Diagnostics 3. KEYBOARD TEST 4 - DISPLAY TEST 5 - To execute the Diagnostic Test Menu from the Diagnostics Menu, set the highlight bar to the Diagnostics Menu. 3-4 Libretto 50CT/70CT Maintenance Manual EXPANSION TEST 12 - EXIT TO DIAGNOSTICS MENU Refer to Sections 3.4 through 12. The following Diagnostic Test Menu displays...
MEMORY TEST 3 - NDP TEST 11 - SYSTEM TEST 2 - HARD DISK TEST 9 - REAL TIMER TEST 10 - ERROR RETRY COUNT SET [HDD & FDD] 99 - Function 99 exits the submenus ... 3 Tests and Diagnostics 3. KEYBOARD TEST 4 - DISPLAY TEST 5 - To execute the Diagnostic Test Menu from the Diagnostics Menu, set the highlight bar to the Diagnostics Menu. 3-4 Libretto 50CT/70CT Maintenance Manual EXPANSION TEST 12 - EXIT TO DIAGNOSTICS MENU Refer to Sections 3.4 through 12. The following Diagnostic Test Menu displays...
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...04 05 01 02 03 Subtest item ROM checksum RAM constant data RAM address pattern data RAM refresh Protected mode Memory module Cache memory Pressed key display Not used PS/2 mouse connect check Pointing stick VRAM read/write for VGA Gradation for VGA ...Gradation for LCD Gradation & mode test for LCD "H" pattern display Sequential read Sequential read/write Random address/data Write specified address Read specified address Ripple pattern Function Wraparound Libretto 50CT/70CT...
...04 05 01 02 03 Subtest item ROM checksum RAM constant data RAM address pattern data RAM refresh Protected mode Memory module Cache memory Pressed key display Not used PS/2 mouse connect check Pointing stick VRAM read/write for VGA Gradation for VGA ...Gradation for LCD Gradation & mode test for LCD "H" pattern display Sequential read Sequential read/write Random address/data Write specified address Read specified address Ripple pattern Function Wraparound Libretto 50CT/70CT...
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... address/data Cross talk & peak shift Write/read/compare (CE) Write specified address Read specified address ECC circuit Sequential write W-R-C specified address Real time Backup memory Real time carry NDP test PCMCIA wraparound FM synthesizer SINE-wave playback 3-8 Libretto 50CT/70CT Maintenance Manual 3.3 Subtest Names 3 Tests and Diagnostics Table 3-1 Subtest names (2/2) No.
... address/data Cross talk & peak shift Write/read/compare (CE) Write specified address Read specified address ECC circuit Sequential write W-R-C specified address Real time Backup memory Real time carry NDP test PCMCIA wraparound FM synthesizer SINE-wave playback 3-8 Libretto 50CT/70CT Maintenance Manual 3.3 Subtest Names 3 Tests and Diagnostics Table 3-1 Subtest names (2/2) No.
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...AAAAh and 5555h. Move the highlight bar to the subtest you want to extended memory (maximum address 100000h), then reads the new data and compares the result with the original data. 3-10 Libretto 50CT/70CT Maintenance Manual The constant data is a short delay between write and read operations..., depending on the screen. Subtest 01 RAM constant data (real mode) This subtest writes a 256-byte unit of constant data to conventional memory (0 to 640 KB), ...
...AAAAh and 5555h. Move the highlight bar to the subtest you want to extended memory (maximum address 100000h), then reads the new data and compares the result with the original data. 3-10 Libretto 50CT/70CT Maintenance Manual The constant data is a short delay between write and read operations..., depending on the screen. Subtest 01 RAM constant data (real mode) This subtest writes a 256-byte unit of constant data to conventional memory (0 to 640 KB), ...
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... the number that corresponds to check the hit-miss ratio (on/off status) for testing an optional memory card. Cache memory To test the cache memory, a pass-through write-read comparison of hits → Fail Libretto 50CT/70CT Maintenance Manual 3-11 Number of misses < Number of hits → OK Number of misses ≥ Number of...
... the number that corresponds to check the hit-miss ratio (on/off status) for testing an optional memory card. Cache memory To test the cache memory, a pass-through write-read comparison of hits → Fail Libretto 50CT/70CT Maintenance Manual 3-11 Number of misses < Number of hits → OK Number of misses ≥ Number of...
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... the directions on " data to addresses 01h; 02h, 04h through 80h Writes 1-bit of "on the screen. To exit, press Ctrl + Break. Libretto 50CT/70CT Maintenance Manual 3-27 Move the highlight bar to the subtest you want to toggle between the time and the date. If the current date is... this data with the original data. Select Subtest 01 and the following prompt will display: Enter new time : 3. Subtest 02 Backup memory This subtest performs the following backup memory check: Writes 1-bit of "off" data to addresses FEh, FB, FD through 7Fh Writes the data patterns AAh and 55h to...
... the directions on " data to addresses 01h; 02h, 04h through 80h Writes 1-bit of "on the screen. To exit, press Ctrl + Break. Libretto 50CT/70CT Maintenance Manual 3-27 Move the highlight bar to the subtest you want to toggle between the time and the date. If the current date is... this data with the original data. Select Subtest 01 and the following prompt will display: Enter new time : 3. Subtest 02 Backup memory This subtest performs the following backup memory check: Writes 1-bit of "off" data to addresses FEh, FB, FD through 7Fh Writes the data patterns AAh and 55h to...