Toshiba T3400 Maintenance Manual Download Page 129

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T3400, T3400CT

4-27

4.12 LED Board

Removal

To remove the LED board, follow the steps below and refer to Figure 4-21.

Turn off the power and disconnect the AC adapter, power cord, and all external
cables.

Remove the battery pack, optional memory card, optional PCMCIA card, and top
cover as described in sections 4.2, 4.3, 4.4, and 4.5.

Remove the

M2.5x4 brass screw

securing the

LED board

(Figure 4-21).

Using a thin object to release the two latches on the top cover, pull up gently on
the

LED holder

and remove it.

Lift out the LED board.

Figure 4-21 Removing the LED Board

Summary of Contents for T3400

Page 1: ... KB Memory The T3400 T3400CT comes standard with 4 MB of CMOS Random Access Memory RAM 3 3 Volts This includes 640 KB of conventional memory and 3 456 KB of extended memory which can be utilized as expanded memory compatible with Lotus Intel Microsoft Expanded Memory Specifications LIM EMS Monochrome LCD T3400 A high resolution Liquid Crystal Display LCD displays 640 x 480 pixels with a 64 level g...

Page 2: ...t a Centronics compatible printer or an external 5 25 inch floppy disk drive RS 232C port The T3400 T3400CT has one 9 pin serial interface port External 3 5 inch FDD port The T3400 T3400CT has one external 3 5 inch FDD port Port replicator port The T3400 T3400CT has one port replicator port which enables connection of an optional port replicator or external monitor adapter The port replicator allo...

Page 3: ...ce Manual 1 3 The T3400 T3400CT Personal Computer is shown in Figure 1 1 T3400 T3400CT system configuration is shown in Figure 1 2 Figure 1 1 T3400 T3400CT Personal Computer Figure 1 2 T3400 T3400CT System Unit Configuration ...

Page 4: ...1 4 T3400 T3400CT Maintenance Manual 1 2 System Unit Block Diagram Figure 1 3 is a block diagram of the T3400 T3400CT system unit Figure 1 3 T3400 T3400CT System Board Block Diagram ...

Page 5: ...ed Fourteen bytes of memory are used for the calendar and clock and the remaining 114 bytes for system configura tion data OSC X2 generates 32 768 KHz for the RTC Keyboard Controller KBC One M37452M4 chip is used This KBC includes the keyboard scan controller and keyboard interface controller The KBC controls the internal keyboard Accupoint pointer control stick external keyboard and PS 2 mouse Th...

Page 6: ... Compatible Bus Interface Controller SMI Controller VL Bus Controller Bus Controller Compatible Bus Interface Controller Compatible Access Controller DMAC Controller I O Controller Address Latch Controller 32 to 16 Bit Controller Address Latch DMA Address Generator Refresh Address Generator I O Register Compatible I O Port Saving Register Controller data in AutoResume resume mode Toshiba Special R...

Page 7: ...tions for the FDD are provided in Table 1 1 Figure 1 4 3 5 inch FDD Table 1 1 3 5 inch FDD Specifications Item 2 MB mode 1 MB mode Storage capacity KB Unformatted 2 000 1 000 Formatted 1 311 737 Number of heads 2 2 Number of cylinders 80 80 Access time ms Track to track 3 3 Average 181 181 Head settling time 15 15 Recording track density tpi 135 135 Data transfer rate Kbps 500 250 Rotation speed r...

Page 8: ...the HDD are provided in Table 1 2 Figure 1 5 2 5 inch HDD Table 1 2 2 5 inch HDD Specifications Items CP2124 MK2124FC Storage capacity MB Formatted 121 6 130 1 Number of disks 2 2 Data heads 4 4 Data surfaces 4 4 Tracks per surface 1 123 1 155 Sectors per track 53 1 55 1 Bytes per sector 512 512 Access time ms Track to track 10 5 Average 17 17 Maximum 35 36 Rotation speed rpm 3 743 3 200 Data tran...

Page 9: ...The 82 key USA or 84 key European keyboard is mounted on the system unit The keyboard is connected to the KBC on the system board via a 19 pin flat cable The keyboard is shown in Figure 1 6 See Appendix F for optional configurations Figure 1 6 Keyboard ...

Page 10: ...ives vertical and horizontal synchronizing signals 8 bit data signals 4 bit upper block data signal and 4 bit lower block data signal and shift clock for data transmis sion All signals are CMOS level compatible The sidelit LCD is shown in Figure 1 7 and its specifications are provided in Table 1 3 Figure 1 7 Monochrome LCD Table 1 3 Monochrome LCD Specifications Item Specifications Number of dots ...

Page 11: ...ard supplies the high frequency current needed to illuminate the FL Specifications for the FL inverter board are provided in Table 1 4 Table 1 4 Monochrome FL Inverter Board Specifications Item Specifications Input Voltage VDC 10 Power W 3 0 Voltage VAC 1 100 r m s Output Current mA 5 0 r m s Frequency KHz 44 ...

Page 12: ...functions of VGA and SVGA for external display The T3400CT s LCD receives 9 bit data signals data enable signals and shift clock for data transmission All signals are CMOS level compatible The TFT LCD is shown in Figure 1 8 Specifications for the LCD are provided in Table 1 5 Figure 1 8 TFT Color LCD Table 1 5 TFT Color LCD Specifications Item Specifications Number of dots dots 640 x 480 Dot pitch...

Page 13: ...inverter board supplies high frequency current to light the LCD Fluorescent Lamp Specifications for the FL inverter are provided in Table 1 6 Table 1 6 FL Inverter Board Specifications Item Specifications Input Voltage VDC 10 Power W 3 Output Voltage VAC 1 100 r m s Current mA 5 0 Frequency KHz 44 ...

Page 14: ...ontrols the LED icon and speaker 4 Turns the battery charging system on and off 5 Determines if the power can be turned on and off 6 Determines if the battery is fully charged or low 7 Calculates remaining battery capacity Power supply output ratings are specified in Table 1 7 Table 1 7 Power Supply Output Ratings DC Regulation Maximum Use for Name voltage tolerance current Ripple V mA mV System l...

Page 15: ...backup and main battery maintain the state of the computer system when AutoResume is enabled Battery Indicator The battery indicator is located on the front left of the computer The indicator color desig nates status of the removable battery pack and AC adapter Orange The battery is being charged AC adapter is attached Green The battery is fully charged AC adapter is attached No light The AC adapt...

Page 16: ...t 3 hours power off Trickle charge About 8 hours power on If one of the following occurs the quick charge process stops 1 The main battery pack becomes fully charged 2 The main battery pack or AC adapter is removed 3 The main battery pack or AC adapter output voltage is abnormal 4 The charge current is abnormal When the main battery pack is fully charged and the AC adapter is attached the power su...

Page 17: ...ervation period full charge 8 Hours 1 9 4 RTC Battery The RTC battery provides power to keep the current date time and other setup information in memory while the computer is turned off Table 1 11 shows the charging time and data preservation period of the RTC battery Table 1 11 RTC Battery Charging Data Preservation Time RTC Battery Time Charging Time Power On 48 Hours Power Off Doesn t charge Da...

Page 18: ...e described in Chapter 3 and detailed replacement procedures are given in Chapter 4 The following tools are necessary for troubleshooting 1 T3400 T3400CT Diagnostics Disk 2 Phillips head screwdriver 2 mm 3 Toshiba MS DOS system disk s 4 2DD or 2HD formatted work disk for FDD testing 5 Cleaning kit for FDD troubleshooting 6 Printer port LED 7 RS 232 C wraparound connector 8 Printer wraparound conne...

Page 19: ... it is ask him or her to enter the pass word If the user has forgotten the password connect the printer port wraparound board F31PRT then turn the POWER switch on The computer will override the password function by erasing the current password Verify with the customer that Toshiba MS DOS is installed on the hard disk Non Toshiba operating systems can cause the computer to malfunction Make sure all...

Page 20: ...T3400 T3400CT Maintenance Manual 2 3 Figure 2 1 Troubleshooting Flowchart ...

Page 21: ...te procedures as follows 1 If an error is detected on the system test memory test display test ASYNC test printer test or real timer test perform the system board troubleshooting proce dures in Section 2 4 2 If an error is detected on the keyboard test perform the keyboard troubleshooting procedures in Section 2 7 3 If an error is detected on the floppy disk test perform the floppy disk drive trou...

Page 22: ...nd supplying power If the DC IN icon does not light the AC adapter is not supplying power go to Check 1 If the DC IN icon is flashing green the AC adapter voltage supply is abnormal or the power supply is not functioning properly go to Check 1 If any of the above indicator conditions are abnormal make sure the DC IN icon LED indica tor lights are not burned out before performing the following chec...

Page 23: ...ck 1 Make sure the AC adapter cable and AC cord are firmly plugged into the DC IN socket and wall outlet If connected correctly go to Check 2 Check 2 Make sure the battery pack is installed correctly Go to Check 3 if it is Check 3 Remove the battery pack and check that the battery terminal is clean and not bent If the terminal appears dirty clean gently with a cotton swab dipped in alcohol If the ...

Page 24: ...s are firmly attached to their connectors Power Supply Board Joint Board System Board AC Adapter Re attach any loose equipment If the system is still not functioning properly perform Check 2 Check 2 The power supply board may be defective Replace the power supply board following the steps in Chapter 4 Replacement Procedures If the system is still not functioning properly perform Check 3 Check 3 Re...

Page 25: ...f a system board is defective Start with Procedure 1 and continue as instructed The procedures provided are Procedure 1 Message Check Procedure 2 Printer Port LED Check on Boot Mode Procedure 3 Printer Port LED Check on Resume Mode Procedure 4 Diagnostic Test Program Execution Check Procedure 5 Replacement Check ...

Page 26: ...ppears when power is turned on replace the RTC battery If any other error message is displayed perform Check 2 a Error in CMOS Bad HDD type Check system Then press F1 key b Error in CMOS Bad battery Check system Then press F1 key c Error in CMOS Bad check sum Check system Then press F1 key d Error in CMOS Bad memory size Check system Then press F1 key e Error in CMOS Bad time function Check system...

Page 27: ...edures in Section 2 5 1 TIMER CH 2 OUT ERROR 2 PIT ERROR 3 MEMORY REFRESH ERROR 4 FIRST 64KB MEMORY ERROR 5 RTC ERROR 6 CRTC ERROR 7 VRAM ERROR 8 KBC 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 17 PIC 2 ERROR 18 KEYBOARD ERROR 19 KBC ERROR 20 HDC ERROR 21...

Page 28: ...ode 2 Turn off the power 3 Plug the printer port LED into the PRT FDD connector 4 Hold down the space bar and turn on the power 5 Read the LED status from left to right at the back of the computer 6 Convert the status from binary to hexadecimal notation 7 If final LED status is FFh normal status go to Procedure 3 8 If final LED status matches any of the test status values in Table 2 1 perform Chec...

Page 29: ...rror in CMOS Bad check sum Error in CMOS Bad configuration Error in CMOS Bad memory size Error in CMOS Bad HDD type Error in CMOS Bad time function Check system Then press F1 key 18H PIC initialization 1FH Display initialization CRTC ERROR VRAM ERROR READ DATA XXXXXXXXH WRITE DATA XXXXXXXXH 22H KBC test KBC ERROR 25H System memory test SYSTEM MEMORY ERROR ADDRESS XXXXXXXXH READ DATA XXXXXXXXH WRIT...

Page 30: ... 1 ERROR 65H FDD initialization NO FDD ERROR FDD ERROR 70H Printer test 80H RS 232 C test 90H Timer initialization TIMER INTERRUPT ERROR RTC UPDATE ERROR A0H NDP initialization A6H Expansion I O ROM FFH Expansion system ROM Check 1 If any of the following error codes is displayed go to Procedure 5 01h 05h 06h 07h 0Ah 0Bh 0Dh 15h 16h 18h 1Fh 22h 25h 30h 40h 41h 42h 54h 55h 65h 70h 80h 90h A0h A6h C...

Page 31: ...adecimal notation 7 If the final LED status is FFh normal status go to Procedure 4 8 If the final LED status matches any of the test status values in Table 2 2 go to Procedure 5 Table 2 2 Printer Port LED Resume Mode Error Status Error status Meaning of status 00H RAM BIOS error F0H Press the reset switch F1H Suspend process error The system will suspend while FDD is accessed etc F2H The system ha...

Page 32: ...the tests 1 System test 2 Memory test 3 Printer test 4 ASYNC test 5 Real Timer test 6 PCMCIA test If an error is detected during the tests go to Procedure 5 Procedure 5 Replacement Check The system board may be damaged Disassemble the T3400 T3400CT following the steps described in Chapter 4 Replacement Procedures and perform the following check Check 1 Replace the system board If the problem persi...

Page 33: ... clean the FDD heads using the cleaning kit If the FDD does not function properly after cleaning go to Procedure 3 If the test program in Procedure 3 cannot be executed go to Procedure 2 Procedure 2 External 5 25 inch FDD Check The floppy disk controller on the computer system board controls the external 3 5 inch FDD and external 5 25 inch FDD To determine if the system board or external 3 5 inch ...

Page 34: ...bled If any other errors occur while the FDD diagnostics test is executing go to Check 1 Table 2 3 Floppy Disk Drive Error Code and Status Code Status 01h Bad command 02h Address mark not found 03h Write protected 04h Record not found 06h Media removed on dual attach card 08h DMA overrun error 09h DMA boundary error 10h CRC error 20h FDC error 40h Seek error 60h FDD not drive 80h Time out error No...

Page 35: ...ks Check 1 Make sure the FDD cable is firmly connected to the system board External 3 5 inch FDD System Board If disconnected re attach it and repeat Procedure 3 If the FDD is still not func tioning properly perform Check 2 Check 2 The FDD or FDD cable may be defective Replace the FDD and cable If the FDD is still not functioning properly perform Check 3 Check 3 Replace the system board following ...

Page 36: ... turn on the computer then perform the follow ing checks Check 1 Type C and press Enter Go to Check 2 if the drive will not change to C Go to Procedure 2 if the drive changes to C Check 2 Type FDISK and press Enter Choose Display Partition Information from the FDISK menu If drive C is listed go to Check 3 If drive C is not listed return to the FDISK menu and choose the option to create a DOS parti...

Page 37: ...any key when ready or Non System disk or disk error Replace and press any key Check 3 Using the Toshiba MS DOS system disk install a system program on the hard disk using the SYS command If the following message appears on the display the system program has been transferred to the HDD Restart the T3400 T3400CT If the error message still appears perform Check 4 System transferred Check 4 The HDD is...

Page 38: ...sage appears on the display the HDD is formatted Format complete If any other error message appears on the display refer to the Toshiba MS DOS Manual for more information and perform Check 2 Check 2 Using the T3400 T3400CT Diagnostic Disk format the HDD with a low level format option Refer to Chapter 3 Tests and Diagnostics for more information about the diagnostic program If the following message...

Page 39: ... Error Code and Status Code Status 01h Bad command 02h Bad address mark 04h Record not found 05h HDC not reset 07h Drive not initialized 08 HDC overrun DRQ 09h DMA boundary error 0Ah Bad sector error 0Bh Bad track error 10h ECC error 11h ECC recover enable 20h HDC error 40h Seek error 80h Time out error AAh Drive not ready BBh Undefined error CCh Write fault E0h Status error EEh Access time out er...

Page 40: ...cur the keyboard is functioning properly Procedure 2 Connector and Replacement Check The keyboard is connected to the system board by a 19 pin flat cable This cable may be disconnected or damaged Disassemble the T3400 T3400CT as described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure the keyboard cable is not damaged and is connected to the system board Key...

Page 41: ...ter The computer automatically detects the external monitor even if Resume mode is enabled If the external monitor works correctly the internal LCD display may be damaged Go to Procedure 3 If the external monitor appears to have the same problem as the internal LCD the display controller may be damaged Go to Procedure 2 Procedure 2 Diagnostic Test Program Execution Check The Display Test program i...

Page 42: ... Check The FL FL inverter board LCD module and system board are connected to the display circuits Any of these components may be damaged Refer to Chapter 4 Replacement Proce dures for disassembly instructions and then perform the following checks If the FL does not illuminate perform Check 1 If characters are not displayed clearly perform Check 3 If some screen functions do not operate properly pe...

Page 43: ... Replace the LED board and test the display If the problem still exists perform Check 5 Check 5 Replace the display cable and test the display If the problem persists perform Check 6 Check 6 The system board may be damaged Replace the system board ...

Page 44: ...Y TEST KEYBOARD TEST DISPLAY TEST FLOPPY DISK TEST PRINTER TEST ASYNC TEST HARD DISK TEST REAL TIMER TEST PCMCIA TEST The following equipment is needed to perform some test programs T3400 T3400CT Diagnostics Disk all tests Formatted working disk for the floppy disk drive test all tests 3 5 inch 2HD 2DD disk for internal 3 5 inch FDD 5 25 inch 2D disk for external 5 25 inch FDD Cleaning kit to clea...

Page 45: ...rive A 1 Insert a Toshiba operating system diskette into the FDD 2 Turn on the computer then proceed to the Running the Diagnostics Program section Modify the CONFIG SYS File 1 Turn on the computer and allow it to boot 2 Deactivate the CONFIG SYS file line that loads the device driver for the expanded memory manager by using DOS batch command REM The CONFIG SYS file may also be re named to keep it...

Page 46: ...DIAGNOSTICS MENU 1 DIAGNOSTIC TEST 2 HARD DISK FORMAT 3 4 HEAD CLEANING 5 LOG UTILITIES 6 RUNNING TEST 7 FDD UTILITIES 8 SYSTEM CONFIGURATION 9 EXIT TO MS DOS 0 SETUP Select items Enter Specify Esc Exit NOTE To exit the T3400XX DIAGNOSTIC TEST MENU press the Esc key Press Ctrl Break to exit a test in progress or Ctrl C to stop a test ...

Page 47: ...IT TO DIAGNOSTICS MENU Select items Enter Specify Esc Exit Refer to Sections 3 4 through 3 14 for detailed descriptions of each Diagnostic Test 1 through 10 Function 88 sets FDD and HDD error retry count Function 99 exits to the Diagnostic Menu 4 Select an option to execute and press Enter The following message appears SYSTEM TEST XXXXXXX T3400XX DIAGNOSTIC TEST VX XX Ctrl Break test end Ctrl C ke...

Page 48: ...rror is found and dis plays the operation guide on the right side of the display screen as shown below ERROR STATUS NAME HALT OPERATION 1 Test end 2 Continue 3 Retry These three selections have the following functions 1 Terminates test and exits to subtest menu 2 Continues test 3 Restarts test from the beginning Use arrow keys to move the cursor to an option and press Enter Selecting NO for ERROR ...

Page 49: ...ARD 01 Pressed key display 82 84 02 Pressed key code display 03 PS 2 Mouse connect check 04 Pointing Stick check 4 DISPLAY 01 VRAM read write 02 Character attributes 03 Character set 04 80 25 30 Character display 05 320 200 Graphics display 06 640 200 Graphics display 07 640 350 400 480 Graphics display 08 Display page 09 H pattern display Border color 10 LED DAC pallet 11 64 color display 12 FDD ...

Page 50: ... 05 Card modem loopback 2400BPS 06 Interrupt test 8 HDD 01 Sequential read 02 Address uniqueness 03 Random address data 04 Cross talk peak shift 05 Write read compare CE 06 Write specified address 07 Read specified address 08 ECC circuit 09 Sequential write 10 W R C specified address 9 REAL TIMER 01 Real time 02 Backup memory 03 Real time carry 10 PCMCIA 01 I O card test PCMCIA ...

Page 51: ...s test reads and displays hardware status as shown below 76543210 H W status 10001000 Bit7 Bit6 CPU clock 33MHz Bit5 Notch signal 2HD Bit4 FDD type 2MB Bit3 Bit2 Drive A B Ext B Bit1 External FDD OFF Bit0 Internal FDD 2HD Table 3 2 lists hardware bit status for each bit tested Press Enter to return to the Subtest Menu Table 3 2 Hardware Bit Status Bit H W status 1 0 7 Reserved 6 CPU clock speed 16...

Page 52: ...e items to test program reference data When a read version is lower than a reference version the speaker sounds and the follow ing screen image is displayed Press the S key to exit The display is unchanged if a read version is higher ROM BIOS V1 00 OK V1 10 ROM BOOT V1 00 OK V1 00 KBC Version V1 26 NG V1 00 PS Micom Version V1 35 OK V1 35 Reference data Current data ...

Page 53: ...pattern data created by the exclusive ORing XORing to the address segment and address offset in conventional memory program end to 640 KB then reads the new data and compares the result with original data Subtest 03 RAM refresh real mode This subtest writes a 256 byte unit of constant data to conventional memory 0 to 640 KB then reads the new data and compares the result with original data Constan...

Page 54: ...16 MB Select the number corresponding to the installed memory card Subtest 06 Backup Memory This subtest writes constant data to memory from address C8000h to CFFFFh then reads new data and compares the result with original data Constant data is 0000h 5555h AAAAh and FFFFh Subtest 08 Cache memory To test cache memory a pass through write read comparison of 5A data is run repeatedly to a test area ...

Page 55: ... key display 82 84 NOTE The Num Lock and Overlay mode must be off to execute this subtest When this subtest is executed the keyboard layout is drawn on the display as shown below When a key is pressed the corresponding key on the screen changes to an character Holding a key down enables the auto repeat function which causes the key display character to blink KEYBOARD TEST IN PROGRESS 301000 PrtSc ...

Page 56: ...k Num Lock Scroll Lock Alt Ctrl Left Shift Right Shift PRESS Enter KEY Subtest 03 PS 2 mouse connect check NOTE A PS 2 mouse must be connected to the computer to execute the connect check This subtest determines if a PS 2 mouse is connected or not If no error is detected it returns to the subtest menu If an error is detected the following message appears KBC MOUSE INTERFACE ERROR HALT OPERATION 1 ...

Page 57: ... displays four character attribute modes normal intensified reverse and blinking The character attribute modes display foreground and intensified color 16 colors or 16 level gray scale using black blue red magenta green cyan yellow and white from the color display The following display appears when the subtest is executed CHARACTER ATTRIBUTES NEXT LINE SHOWS NORMAL DISPLAY NNNNNNNNNNNNNNNNNNNNNNNN...

Page 58: ...Y TEST menu press Ctrl Break Subtest 03 Character Set In this subtest the character set address 00h to FFh is displayed in the 40 25 character mode as shown below Press Enter KEY To exit to the DISPLAY TEST menu press Ctrl Break 320 200 GRAPHICS DISPLAY 13 PRESS Enter KEY BLACK BLUE GREEN CYAN RED MAGENTA BROWN WHITE GRAY LIGHT BLUE LIGHT GREEN LIGHT CYAN LIGHT RED LIGHT MAGENTA YELLOW INTENSE WHI...

Page 59: ...mnopq 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqr 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrs 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrst 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstu 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuv 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvw 0123456789 ABCDEFGHIJKLMN...

Page 60: ... 400 480 Character Display mode 10 74 12 This subtest displays even odd and all dots in 640x350 640x400 and 640x480 dot graphics mode 10 74 12 as shown below Press Enter to change displayed image size To exit to the DISPLAY TEST menu press Ctrl Break 640 XXX GRAPHICS DISPLAY EVEN DOTS ODD DOTS ALL DOTS DRIVEN DRIVEN DRIVEN PRESS Enter KEY 320 200 GRAPHICS DISPLAY COLOR SET X X PRESS ENTER KEY GREE...

Page 61: ...HHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH...

Page 62: ... latch test 1 256 times 2 endless After pressing Enter the subtest writes the 2A and 15 data to 6 bits of 256x3 RGB then reads new data and compares the result with original data To exit press Ctrl Break Then press Enter Subtest 11 64 color display This subtest sets the video mode to 13 and displays color code 0 to 63 simultaneously then displays seven screens The first screen shows many colors at...

Page 63: ...the floppy disk to be tested and press Enter Media in drive X mode 0 2DD 1 2D 2 2D 2HD 2DD 3 2HD 3 Select the track to start the test on and press Enter Pressing Enter alone sets the start track to zero Test start track Enter 0 dd 00 79 4 The floppy disk test menu will appear after the start track number is selected Select a subtest number and press Enter The following message will appear during t...

Page 64: ... Test Menu Refer to step 3 at the beginning of this section to set the start track Subtest 02 Sequential Read Write This subtest continuously writes data pattern B5ADADh to all the specified tracks selected in subtest 01 Data is then read and compared to the original data Subtest 03 Random Address Data This subtest writes random data to random addresses on all tracks defined in subtest 01 Data is ...

Page 65: ...elect the appropriate printer channel number and press Enter to execute a subtest Subtest 01 Ripple Pattern This subtest prints characters for codes 20h through 7Eh line by line while shifting one character to the left at the beginning of each new line 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmno 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnop 0123456789 ABCDEFGHIJKLMNOPQRSTUVW...

Page 66: ...T 3 THIS LINE SHOWS COMPRESSED PRINT 4 T H I S L I N E S H O W S E M P H A S I Z E D P R I N T 5 T H I S L I N E S H O W S D O U B L E S T R I K E P R I N T 6 ALL CHARACTERS PRINT 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmn opqrstuvwxyz Subtest 03 Wraparound NOTE To execute this subtest a printer wraparound connector must be connected to the computer printer port The printer wraparound ...

Page 67: ...nnel 2 XXXXh Channel 3 XXXXh Select the Channel number 1 3 The serial I O port address is specified by the XXXXh number Select the appropriate num ber and press Enter to start the subtest Subtest 01 Wraparound board NOTE To execute this subtest an RS 232C wraparound connector 34M741621G01 must be connected to the RS 232C port The wrap around connector wiring diagram is shown in Appendix G This sub...

Page 68: ...00BPS NOTES 1 To execute this subtest a 2400 bps type card modem must be installed 2 It is not necessary to turn on the modem at the Setup option When this subtest is selected the modem is powered on automatically 3 Set the PCMCIA Slot to Others in the Setup program to execute This subtest sends data from the RS 232C port to the built in modem The same data is then sent back to the RS 232C port an...

Page 69: ...rtition Then execute the Toshiba MS DOS FORMAT command Refer to the Toshiba MS DOS manual for details 1 When the hard disk test is selected the following message will appear Test drive number select 1 HDD 1 2 HDD 2 0 HDD1 2 2 Select the HDD number to be tested and press Enter The following message will appear HDC F W error retry 1 yes 2 no 3 This message is used to select the retry operation when ...

Page 70: ...g tested and the last two digits the error status code as explained in Table 3 3 Subtest 01 Sequential Read This subtest is a sequential reading of all HDD tracks starting at 0 When all tracks have been read the test starts at the last track and reads sequentially back to track 0 Subtest 02 Address Uniqueness This subtest writes unique address data to each sector track by track The data written to...

Page 71: ...linder on the HDD then reads the data and compares it with the original data Subtest 06 Write specified address This subtest writes specified data to a specified cylinder and head Subtest 07 Read specified address This subtest reads data written to a specified cylinder and head Subtest 08 ECC circuit This subtest checks the Error Check and Correction ECC circuit functions of a specified cylinder a...

Page 72: ...te PRESS ENTER KEY TO EXIT TEST 2 If the current date is not correct input the correct date at the Enter new date prompt and press Enter The following prompt will appear Enter new time 3 If the current time is not correct input the correct time in 24 hour format Pressing Enter toggles between the time and date To exit press Ctrl Break Subtest 02 Backup Memory This subtest performs the following ba...

Page 73: ...e are erased This subtest checks real time clock increments verifying the date and time are displayed in the following format Current date 12 31 1992 Current time 23 59 58 Pressing Enter displays the following Current date 01 01 1993 Current time 00 00 00 PRESS Enter KEY TO EXIT TEST Press Ctrl Break to exit ...

Page 74: ...MCIA slot Address line REG CE 1 CE 2 line Data line Speaker line Wait line BSY BVD1 line This subtest is executed in the following order Sub Address Good Bad Contents 01 00001 nn xx Address line 00001 nn xx REG CE 1 CE 2 nn A0 90 80 00 02 00002 ww rr Data line ww write data rr read data 03 00003 Speaker line 04 00004 40 80 xx Wait line 40 xx 80 05 00005 nn xx Other lines BSY BVD1 nn 21 00 ...

Page 75: ...ged 14 Memory Read Write Error DD Cache Memory Error Keyboard 01 Mouse Interface Error 02 IPS Interface Error 03 Interface Error 04 Retransmit Error 05 Mouse Handler Not Support 06 PS 2 Mouse IPS Not FDD 01 Bad Command 02 Address Mark Not Found 03 Write Protected 04 Record Not Found 06 Media Removed 08 DMA Overrun Error 09 DMA Boundary Error 10 CRC Error 20 FDC Error 40 Seek Error 60 FDD Not Drive...

Page 76: ...ne Card Modem HDD 01 Bad Command Error 02 Bad Address Mark Error 04 Record Not Found 05 HDC Not Reset Error 07 Drive Not Initialized 08 HDC Overrun DRQ 09 DMA Boundary Error 0A Bad Sector 0B Bad Track Error 10 ECC Error 11 ECC Recover Enable 20 HDC Error 40 Seek Error 80 Time Out Error AA Drive Not Ready BB Undefined Error CC Write Fault E0 Status Error EE Access Time Out Error PCMCIA C1 Address L...

Page 77: ... error register are described in Tables 3 4 and 3 5 respectively Table 3 4 Hard Disk Controller Status Register Contents Bit Name Description 7 BSY 0 HDC is busy Busy 1 HDC is ready 6 DRDY 0 Hard disk drive is not ready to accept any command Drive ready 1 Hard disk drive is ready 5 DWF 0 DWF error is not detected Drive write fault 1 Write fault condition occurred 4 DSC 0 The hard disk drive heads ...

Page 78: ...orrectable 1 Uncorrectable data error has been detected 5 Not used 4 IDNF 0 Other Identification 1 There was no ID field in the requested sector 3 Not used 2 ABRT 0 Other Abort 1 Illegal command error or a drive status error occurred 1 TK00 0 The hard disk found track 0 during a recalibrate command Track 0 1 The hard disk could not find track 0 during a recalibrate command 0 Not used ...

Page 79: ...ls on using the BACKUP command 3 16 1 Function Description 1 All track FORMAT This option performs a low level format of all hard disk tracks as listed in Table 3 6 below NOTE Before executing the All Track FORMAT option check for bad tracks using the Bad Track CHECK option or display a list of bad tracks on the HDD Table 3 6 Hard Disk Formatting Sequence Model Name CP30544 510 MB Sector sequences...

Page 80: ... erased when this program is executed Before executing transfer the contents of the hard disk onto a backup system This can be done with the Toshiba MS DOS BACKUP command See the Toshiba MS DOS manual for details on using the BACKUP command Select 2 from the DIAGNOSTIC MENU and press ENTER to display the following menu DIAGNOSTICS HARD DISK FORMAT VX XX 1 All track FORMAT 2 Good track FORMAT 3 Bad...

Page 81: ...Bad Track Register prompt appears Enter the bad track cylinder and head numbers and press Enter If there are no bad tracks press Enter only to execute All Track Format as described in Item e below WARNING Current DISK data will be completely destroyed Press Bad cylinder number dddd key Press Bad head number dd key Enter cylinder and head number in the format above in decimal notation Repeat for ea...

Page 82: ...w Drive number select 1 1 2 2 Interleave number 1 1 8 Press Cylinder number dddd Press Head number dd Press Enter to return to the Hard Disk Format menu 4 Bad track CHECK This subtest reads the entire disk and displays a bad track list The test is termi nated in case of a bad track check error To initiate the subtest enter the drive number at the prompt shown below Drive number select 1 1 2 2 Bad ...

Page 83: ...ct 4 from the DIAGNOSTIC MENU and press Enter to display the following messages DIAGNOSTICS FLOPPY DISK HEAD CLEANING VX XX Mount cleaning disk s on drive s Press any key when ready 2 Remove the Diagnostics Disk from the FDD insert the cleaning disk and press Enter 3 When the cleaning start message appears FDD head cleaning has begun 4 The display returns to the DIAGNOSTIC MENU when the program is...

Page 84: ...6 FDD HDD or memory address ADDR 7 Write data WD 8 Read data RD 9 HDC status HSTS 10 Error status name ERROR STATUS NAME 3 18 2 Operations 1 Select 5 in the DIAGNOSTIC MENU and press Enter to log error information into RAM or a floppy disk Error information is displayed in the following format XXXXX ERRORS CNT TS NAME PASS STS ADDR WD RD HSTS STATUS NAME 001 FDD 02 0000 103 00001 00 00 FDD WRITE P...

Page 85: ...ay to the previous page 3 returns to the Diagnostic Menu 4 erases all error log information in RAM 5 outputs the error log information to a printer 6 reads log information from a floppy disk 7 writes log information to a floppy disk 3 In the case of error retry OK a capital R will be placed at the beginning of the error status but not added to the error count ...

Page 86: ...rget to load a work disk in the FDD If a work disk is not loaded an error will be generated during FDD testing 1 Remove the diagnostics disk from the FDD and insert the work disk 2 Select 6 from the Diagnostic Menu and press Enter to display the following message Printer wrap around test Y N Select Y yes to execute the printer wraparound test A printer wraparound connector must be connected to the...

Page 87: ...nd press Enter to display the following message Mount the work disk s on the drive s then press Enter key Warning The contents of the disk s will be destroyed 5 This program is executed continuously To terminate the program press Ctrl Break ...

Page 88: ... sided double density 48 67 5 TPI MFM mode 512 bytes 9 sectors track b 2DD Double sided double density double track 96 135 TPI MFM mode 512 bytes 9 sectors track c 2HD Double sided high density double track 96 135 TPI MFM mode 512 bytes 18 sectors track 2 COPY This program copies data from a source floppy disk to a target floppy disk 3 DUMP This program displays floppy disk both 3 5 inch and 5 25 ...

Page 89: ...he FDD insert the work disk and press any key The following message will be displayed when the FDD format is executed FDD TYPE TRACK XXX FDD TYPE HEAD X FDD TYPE SECTOR XX Format start track head XXX X After the floppy disk is formatted the following message will appear Format complete Another format 1 Yes 2 No e Type 1 to display the message from step c above Type 2 to return to the DIAGNOSTIC ME...

Page 90: ...No e To copy another disk type 1 and the message from step a will be displayed again Enter 2 to return to the DIAGNOSTIC MENU 4 DUMP program a Select dump to display the following message DIAGNOSTICS HARD DISK FLOPPY DISK DUMP VX XX Drive type select 1 FDD 2 HDD b Select a format type number If 2 is selected the display will go to step e Select FDD number 1 A 2 B c Select a drive number and the fo...

Page 91: ...f hard disk drives 8 Number of printer ports 9 Extended Memory Size 10 PS Micom Version 3 21 2 Operations Select 8 from the DIAGNOSTIC MENU and press Enter to display the system configuration menu SYSTEM CONFIGURATION BIOS ROM VERSION VX XX BOOT ROM VERSION VX XX KBC VERSION VX XX 639KB MEMORY 1 FLOPPY DISK DRIVE S 1 ASYNC ADAPTER 1 HARD DISK DRIVE S 1 PRINTER ADAPTER XXXXXKB EXTENDED MEMORY PS MI...

Page 92: ... Colors T3400CT only e Power On Display T3400CT only 3 COM PCMCIA FDD PRT a Serial Port b PC Card Slot c Ext FDD PRT d Printer Port Type 4 Hard Disk 5 Power on Password 6 Others a Power up Mode b CPU Cache c Processing Speed d Battery Save Mode e Speaker Volume f Panel Power On Off g Alarm Power On h Boot Priority i Pointing Devices j Hotkey k Ext Keyboard Fn key equivalent 7 Battery Save Options ...

Page 93: ...oot the following message is displayed Are you sure Y N If the changed item requires a system re boot the following message is displayed Are you sure Y N Changes made will cause the system to re boot 2 To make other changes press N Repeat the steps above Capacity MB Total 4096 KB Base 640 KB Extended 3328 KB Shadow BIOS ROM 128 KB Not Registered T3400 SETUP POWER ON PASSWORD HARD DISK Power up Mod...

Page 94: ...describes each group and its options 1 Memory This group lists values for computer memory a Total This field displays the total amount of memory installed and is calculated by the computer These values may not be changed by the user b Base This field displays the amount of base conventional memory 640 KB and is calculated by the computer These values may not be changed by the user c Extended Memor...

Page 95: ...form to the CRT being used and cannot be changed c LCD Gray Scale Level T3400 only Use this option which appears in SETUP and the Pop up Window to switch between normal and reverse video on the T3400 It does not appear on the T3400CT The options are Normal 64 levels Displays black text on white background with 64 shades of gray Reverse 64 levels Displays white text on black background with 64 shad...

Page 96: ...rt default COM2 3 2F8h PCMCIA default Not Used Disables port If the Serial Port COM level is set to the same level as the Toshiba card modem the card modem COM level is automatically reset to Not Used b PC Card Slot Use this option to select PC Card slot usage PCMCIA Choose this selection when a PCMCIA card is installed This isthe default Others Choose this selection when a Toshiba card modem mode...

Page 97: ...g External FDD ID Internal FDD ID Printer default None A FDD A A B FDD B B A d Printer Port Type This option sets the communication mode for the printer FDD port to either output only or bi directional It is effective only when the Ext FDD PRT option is set to printer If FDD is selected this setting is ignored and the mode is set to bi directional For most printers the port should be set to Output...

Page 98: ...this option to choose between AutoResume and boot mode This option can also be set using the Pop Up Window Boot Turns on boot mode This is the default Resume Turns on the AutoResume feature NOTE AutoResume does not work with the enhanced mode of Microsoft Win dows unless WRESUME driver is loaded Refer to Power On Modes in Chapter 2 of the T3400 Reference Manual for additional information b CPU Cac...

Page 99: ... battery save parameters on the sub window BATTERY SAVE OPTIONS When selected the automatic setting feature Long Life or Normal Life is disabled and the user preferred para meters become effective The default setting in the sub windows depends on the Battery Save Mode Full Power or Low Power For details see Battery Save Options e Speaker Volume This option disables or sets the speaker volume level...

Page 100: ...be reset g Alarm Power On Use this option to set the time for the system to turn on automatically This option can be set to expected transmission times for periods of personal absence The option does not automatically turn off the system and does not appear when the computer is in boot mode 00 00 00 Sets the power on time 24 hour clock Disabled Disables the alarm NOTE Do not remove the AC adapter ...

Page 101: ...y combination on an external keyboard to emulate the Fn key on the internal keyboard Setting an Fn key equivalent will enable use of Hotkeys by pressing the set combination instead of the Fn key Disabled Disables feature This is the default Fn Equivalent Left Left Alt Right Ctrl Right Alt Left Alt Left Shift Right Alt Right Shift Left Alt Caps Lock 7 Battery Save Options a CPU Sleep Mode Use this ...

Page 102: ...utomatically turns off power to the HDD if it is not used for the duration set Duration xx can be set to 3 5 10 15 20 or 30 minutes d System Auto Off Use this option to enable or disable the system automatic off function when power up mode is set to Resume In boot mode this feature is always disabled and therefore not displayed Disabled Disables system automatic power off xx Min Automatically turn...

Page 103: ... RTC Battery Backup battery Accupoint Control Button System Board Power Supply Board FL Inverter Board Monochrome LCD Display T3400 FL TFT Color LCD Display T3400CT FL Unit Before Beginning Look over the procedures in this section before disassembling the computer Become familiar with disassembly and reassembly steps 1 Do not disassemble the computer unless it is operating abnormally 2 Use only co...

Page 104: ...t on the FRU installed NOTE The illustrations in Chapter 4 are based on the appearance of the T3400 unless otherwise noted Disassembly Procedures The T3400 T3400CT has two basic types of cable connectors Pressure Plate Connectors Pin Connectors To disconnect a pressure plate connector cable lift up the connector tabs on either side and slide the cable out To attach a cable make sure the pressure p...

Page 105: ... damage the threads or screw head and may prevent proper FRU seating After re assembly verify that both the installed FRU and computer are functioning properly Tools and Equipment The use of ElectroStatic Discharge ESD equipment is very important for personnel safety Proper use of these devices will also increase the success rate of repairs and lower the cost for damaged or destroyed parts The fol...

Page 106: ...y lock to free the battery release latch then slide the release latch to pop the battery out slightly to the left Figure 4 1 Figure 4 1 Unlocking the Battery Pack 5 A slight gap will open between the right end of the battery pack and the computer With your left hand slip your fingers into the gap and pull the battery pack to the left until it stops about 1 centimeter or 1 2 inch 6 Grasp the left e...

Page 107: ...ry pack terminals 2 Slide the battery pack to the right until it snaps on There will still be a gap be tween the right end of the battery pack and terminals Figure 4 2 3 Gently press down on the center of the battery pack and at the same time push it to the right Slight resistance will be felt when the battery is nearly seated Press in carefully until it clicks into place then lock the battery loc...

Page 108: ...all external cables 2 Remove the battery pack as described in section 4 2 3 Turn the computer upside down 4 Remove two M2 5x4 screws securing the memory module socket cover Figure 4 3 5 Slide a fingernail or other thin object under the notch on the cover and rotate up to remove Two latches hold the cover in place on the side away from the screws Figure 4 3 Figure 4 3 Removing the Memory Module Soc...

Page 109: ...ace Press these to the outside to release the module The side of the module away from the connector edge will spring up Figure 4 4 Figure 4 4 Removing the Memory Module CAUTION DO NOT touch the connector edge of the memory card Debris or oil may cause memory access problems ...

Page 110: ...f the module should be on the right as the module is inserted Figure 4 5 Figure 4 5 Inserting the Memory Module 2 The module is supported by springs in the memory module socket Gently push the module into place until two latches close over each side Figure 4 4 3 Fit the socket cover latches into place and seat the cover Figure 4 3 4 Secure the two M2 5x4 screws Figure 4 3 5 Install the battery pac...

Page 111: ...ure 4 6 1 Turn off the power and disconnect the AC adapter power cord and all external cables 2 Remove the battery pack as described in section 4 2 3 Snap off the PCMCIA slot cover Figure 4 6 4 Press the eject button to pop the card out slightly Figure 4 6 5 Grasp the card edges and remove Figure 4 6 Removing the PCMCIA Card ...

Page 112: ... contact edge first making sure it is right side up 2 Some resistance will be felt when the card is almost seated Press gently to assure firm connection but do not force The eject button will pop out when the card is fully seated Figure 4 7 Figure 4 7 Installing the Optional PCMCIA Card 3 Install the battery pack as described in section 4 2 ...

Page 113: ...adapter power cord and all external cables 2 Remove the battery pack optional memory and PCMCIA cards as described in sections 4 2 4 3 and 4 4 3 Remove seven M2 5x8 silver screws from the bottom of the computer and two M2 5x4 screws from the battery seating area These screws secure the top cover to the bottom cover Figure 4 8 Figure 4 8 Removing the Bottom Cover Screws ...

Page 114: ...n the work surface with the front edge of the bottom facing upward at approximately 45 degrees Gently pry open the 5 front latches and the 2 latches at either side 6 Do not try to remove the top cover yet Turn the computer right side up and lift up the front edge of the top cover Figure 4 10 7 Disconnect the AccuPoint cable from PJ503 keyboard cable from PJ8 LED cable from PJ16 and display cable f...

Page 115: ...16 keyboard cable to PJ8 and AccuPoint cable to PJ503 Figure 4 10 2 Turn the computer upside down and press firmly at the display latch until the bottom and top covers snap into place Figure 4 9 3 Close the computer and secure the top cover with seven M2 5x8 silver screws and two M2 5x4 screws Figure 4 8 4 Replace the optional PCMCIA card optional memory card and battery pack as described in secti...

Page 116: ...rd and all external cables 2 Remove the battery pack optional memory card optional PCMCIA card and top cover as described in sections 4 2 through 4 5 3 Remove one M2 5x6 brass screw securing the HDD bracket to the bottom cover Figure 4 11 4 Disconnect the HDD flexible cable from PJ5 on the system board Figure 4 11 5 Lift out the HDD Figure 4 11 Figure 4 11 Removing the HDD and Bracket ...

Page 117: ... the flexible cable from the HDD Figure 4 12 8 Slip the flexible cable out of three latches on the HDD bracket to remove the HDD Figure 4 12 Removing the HDD Flexible Cable 9 Remove four M3x4 flat head screws securing the bracket to the HDD Figure 4 13 10 Remove the bracket Figure 4 13 Figure 4 13 Removing the HDD ...

Page 118: ...nder three latches on the bracket Figure 4 12 4 Connect the flexible cable to the HDD Figure 4 12 5 Secure the flexible cable with one M2 5x4 brass screw Figure 4 12 6 Seat the HDD into the bottom cover Figure 4 11 7 Connect the flexible cable to PJ5 on the system board Figure 4 11 8 Secure the HDD with one M2 5x6 brass screw Figure 4 11 9 Replace the top cover optional PCMCIA card optional memory...

Page 119: ...l memory card optional PCMCIA card and top cover as described in sections 4 2 through 4 5 3 Disconnect the RTC battery cable from PJ2 on the system board Figure 4 14 4 Slide the RTC battery out of the retaining brackets to remove Figure 4 14 5 Disconnect the backup battery cable from PJ1 on the power supply board lift the backup battery out of the bottom cover and remove the clear plastic insulato...

Page 120: ...p battery cable to PJ1 on the power supply board and seat the backup battery in the bottom cover Figure 4 14 3 Slide the RTC battery under the brackets Figure 4 14 4 Route the RTC battery cable under the clear plastic insulator then connect the cable to PJ2 on the system board Figure 4 14 5 Replace the top cover optional PCMCIA card optional memory card and battery pack as described in sections 4 ...

Page 121: ... and all external cables 2 Remove the battery pack optional memory card optional PCMCIA card and top cover as described in sections 4 2 through 4 5 3 Disconnect the control button cable from PJ801 on the power supply system joint board Figure 4 15 4 Slide the control button and cable free of latches on the bottom cover and lift out to remove Figure 4 15 Figure 4 15 Removing the AccuPoint Control B...

Page 122: ...re 4 15 1 Slide the control button and cable under the latches on the bottom cover Figure 4 15 2 Connect the control button cable to PJ801 on the power supply system joint board Figure 4 15 3 Replace the top cover optional PCMCIA card optional memory card and battery pack as described in sections 4 5 through 4 2 ...

Page 123: ...back connector side of the system board slightly Figure 4 16 4 Remove one M2x6 brass screw securing the system board to the bottom cover 5 Hold down the power supply system joint board with your thumb and pull the system board to disconnect it from the power supply system joint board Fig ure 4 16 6 Lift out the system board Figure 4 16 NOTE Be careful with the PCMCIA card eject button it may be ne...

Page 124: ...NOTE Be careful with the PCMCIA card eject button it may be necessary to open the PCMCIA slot cover for the button to clear the bottom cover Be sure to match the guide pins with the corresponding holes in the board 3 Secure the system board to the bottom cover with one M2x6 screw 4 Replace the RTC and backup batteries hard disk drive top cover optional PCMCIA card optional memory card and battery ...

Page 125: ...ord and all external cables 2 Remove the battery pack optional memory card optional PCMCIA card top cover hard disk drive RTC and backup batteries AccuPoint control button and system board as described in sections 4 2 through 4 9 3 Lift out the power supply board being careful to clear the plastic light conduc tor for the battery LED indicator Figure 4 17 Figure 4 17 Removing the Power Supply Boar...

Page 126: ... and 4 18 1 Connect the power supply system joint board to the power supply board Figure 4 18 2 Seat the power supply board into the bottom cover being careful to clear the plastic light conductor for the battery LED indicator Figure 4 17 3 Replace the system board AccuPoint control button RTC and backup batteries hard disk drive top cover optional PCMCIA card optional memory card and battery pack...

Page 127: ...ernal cables 2 Remove the battery pack optional memory card optional PCMCIA card and top cover as described in sections 4 2 through 4 5 3 From the top keyboard side use a thin object to pry up the left and right sides of the plastic panel slightly then pry open and release the other latches starting near the ends and working toward the center Figure 4 19 Figure 4 19 Unlatching the Plastic Panel ...

Page 128: ...oard follow the steps below and refer to Figures 4 19 and 4 20 1 Seat the keyboard Figure 4 20 2 Secure three M2 5x6 brass screws at the front of the keyboard Figure 4 20 3 Seat the plastic panel and press firmly to secure the latches Figure 4 19 4 Replace the top cover optional PCMCIA card optional memory card and battery pack as described in sections 4 5 through 4 2 ...

Page 129: ...l external cables 2 Remove the battery pack optional memory card optional PCMCIA card and top cover as described in sections 4 2 4 3 4 4 and 4 5 3 Remove the M2 5x4 brass screw securing the LED board Figure 4 21 4 Using a thin object to release the two latches on the top cover pull up gently on the LED holder and remove it 5 Lift out the LED board Figure 4 21 Removing the LED Board ...

Page 130: ... LED board Figure 4 21 2 Seat the LED holder on the LED board and press gently to secure the latches Figure 4 21 3 Secure the M2 5x4 brass screw holding the LED board and LED holder Figure 4 21 4 Replace the top cover optional PCMCIA card optional memory card and battery pack as described in sections 4 5 through 4 2 ...

Page 131: ... display hinges and two rubber pads from the top corners of the display Figure 4 22 4 Remove two brass M2 5x6 screws at the bottom corners of the display mask and two brass M2x6 screws at the top corners Figure 4 22 5 Slip your fingers between the display cover and mask and pull out gently to release one latch at the top center 6 Continue around the display cover to release two more latches at the...

Page 132: ...hes Start at the bottom five latches and work your way around the sides four latches at each side to the three latches at the top Figure 4 22 2 Secure two brass M2x6 screws at the top of the display cover and two brass M2 5x6 screws at the bottom Figure 4 22 3 Replace the two rubber pads and two screw covers Figure 4 22 4 Replace the battery pack as described in section 4 2 ...

Page 133: ... the computer and disconnect the AC adapter power cord and all external cables 2 Remove the battery pack and display mask as described in sections 4 2 and 4 13 3 Remove two brass M2x6 screws from the FL inverter board 4 Turn over the board and disconnect the FL inverter cable from CN1 and the FL cable from CN2 Figure 4 23 Removing the FL Inverter Board ...

Page 134: ...low and refer to Figure 4 23 1 Turn the board over and connect the FL inverter cable to CN1 and the FL cable to CN2 Figure 4 23 2 Secure two brass M2x6 screws holding the the FL inverter board Figure 4 23 3 Replace the display mask and battery pack as described in sections 4 13 and 4 2 ...

Page 135: ...r power cord and all external cables 2 Remove the battery pack display mask and FL inverter board as described in sections 4 2 4 13 and 4 14 3 Remove four brass M2x6 screws at each corner of the display module The screw at the bottom right corner also secures the ground cable Figure 4 24 4 Rotate the display panel out so that it lies flat on an ESD protected surface Figure 4 24 Figure 4 24 Removin...

Page 136: ...splay s flat cable from the display unit Figure 4 25 Figure 4 25 Disconnection From the Display Unit 6 Disconnect the other end of the flat cable from the computer s display cable Figure 4 26 Figure 4 26 Disconnection From the Display Cable ...

Page 137: ...ay cable Figure 4 26 2 Connect the flat cable to the display unit Figure 4 25 3 Seat the display module in the display cover and secure four brass M2x6 screws one at each corner Figure 4 24 NOTE Secure the ground cable at the bottom right corner with one of the screws 4 Replace the FL inverter board display mask and battery pack as described in sections 4 14 4 13 and 4 2 ...

Page 138: ... off the power to the computer and disconnect the AC adapter power cord and all external cables 2 Remove the battery pack display mask FL inverter board and display module as described in sections 4 2 4 13 4 14 and 4 15 3 Remove three brass M2x2 flathead screws securing the FL cover Figure 4 27 4 Lift out the FL cover Figure 4 27 Removing the FL Cover Screws ...

Page 139: ...the monochrome fluorescent lamp follow the steps below and refer to Figures 4 27 and 4 28 1 Seat the FL Figure 4 28 2 Seat the FL cover and secure it with three brass M2x2 flat head screws Figure 4 27 3 Replace the display module FL inverter board display mask and battery pack as described in sections 4 15 4 14 4 13 and 4 2 ...

Page 140: ...ternal cables 2 Remove the battery pack display mask and FL inverter board as described in sections 4 2 4 13 and 4 14 3 Remove four brass M2x6 screws at each corner of the display module The screw at the bottom right corner also secures the ground cable Figure 4 29 4 Note the ground and display cable routing then rotate the display module out of the display cover from left to right Figure 4 29 Fig...

Page 141: ...d 4 30 1 Connect the display cable to the display module routing the cable back under the clear plastic insulator Figure 4 30 2 Seat the display module in the display cover and secure four brass M2x6 screws one at each corner of the module Figure 4 29 NOTE Secure the ground cable at the bottom right corner with one of the screws 3 Replace the FL inverter board display mask and battery pack as desc...

Page 142: ...mp FL follow the steps below and refer to Figure 4 31 1 Turn off the power to the computer and disconnect the AC adapter power cord and all external cables 2 Remove the battery pack display mask FL inverter board and display module as described in sections 4 2 4 13 4 14 and 4 17 3 Noting display cable routing place the FL unit face down and remove four M2x4 silver screws Figure 4 31 4 Lift the FL ...

Page 143: ...below and refer to Figure 4 31 1 Noting display cable routing press into underlying groove then seat the FL unit in the frame and secure four M2x4 silver screws Figure 4 31 2 Replace the display module FL inverter board display mask and battery pack as described in sections 4 17 4 14 4 13 and 4 2 ...

Page 144: ...ing the LCD module in the LCD cover be sure to seat it so that it is properly aligned and maximum visibility of the display is maintained 2 Carefully align the holes at the four corners of the LCD module with correspond ing holes in the cover before securing with screws Do not force the module into place stress can affect its performance The polarized surface of the panel scars easily handle caref...

Page 145: ...is very dirty we recommend a CRT cleaning agent Apply the agent to a cloth and then wipe the surface Do not apply cleanser directly to the panel 4 Water or other liquids left on the surface for a long period can change the screen tint or stain the screen Be sure to quickly wipe off any liquid 5 Do drop or strike the LCD module with a hard object glass used in the panel could break or crack ...

Page 146: ...ostatic discharge damage to the CMOS LSI circuits 7 Do not expose the module to direct sunlight or strong ultraviolet rays for long periods 8 Do not store the module at temperatures below specifications Cold can cause liquid crystals to freeze lose their elasticity or otherwise suffer damage ...

Page 147: ...in Chapter 4 Disassem bly beyond the instructions in this manual can cause malfunctions 10 If transporting the module do not use packing materials that contain epoxy resin amine or silicon glue alcohol or oxime These materials can release gas that can damage panel polarization ...

Page 148: ...Appendix B Board Layout B 1 System Board Front View Figure B 1 Board Layout Front T3400 T3400CT B 1 ...

Page 149: ...B 2 T3400 T3400CT B 2 System Board Back View Figure B 2 Board Layout Back ...

Page 150: ... H PJ5 HDD Connector I PJ6 Serial I F Connector J PJ8 Keyboard Connector K PJ9 PCMCIA Connector L PJ10 Internal LCD Connector M PJ15 Power Supply Board Joint Connector N PJ16 LED Connector O PJ17 Port Replicator Connector Table B 2 System Board ICs and Connectors Back Mark Number Name A IC3 to IC10 System Memory B IC14 Real Time Clock C IC16 T9901 D IC18 BIOS ROM E IC 20 Keyboard Controller F IC 2...

Page 151: ...B 4 T3400 T3400CT ...

Page 152: ...O 12 MA00 110 O 48 GND 13 MA01 110 O 49 MD18 100 I O 14 MA02 110 O 50 MD19 100 I O 15 MA03 110 O 51 MD20 100 I O 16 MA04 110 O 52 MD21 100 I O 17 MA05 110 O 53 MD22 100 I O 18 MA06 110 O 54 MD23 100 I O 19 MA10 110 O 55 NC 20 NC 56 MD24 100 I O 21 MD08 100 O 57 MD25 100 I O 22 MD09 100 O 58 MD26 100 I O 23 MD10 100 O 59 MD28 100 I O 24 MD11 100 O 60 MD27 100 I O 25 MD12 100 O 61 B3V 26 MD13 100 O ...

Page 153: ... 04 PDB02 100 I O 17 SLIN 000 I O 05 PDB03 100 I O 18 GND 06 PDB04 100 I O 19 GND 07 PDB05 100 I O 20 GND 08 PDB06 100 I O 21 GND 09 PDB07 100 I O 22 GND 10 ACK 000 I O 23 GND 11 BUSY 100 I O 24 GND 12 PE 100 I O 25 GND 13 SELCT 100 I O C 4 PJ3 PRT FDD Ext Connectors for FDD 25 Pin Table C 4 PRT FDD Ext Connector for FDD Pin Assignment 25 Pin Pin Signal I O Pin Signal I O 01 RDY I 14 LOWD O 02 IND...

Page 154: ...gnal I O Pin Signal I O 01 VCC 14 IFSTEP 010 O 02 IFINDX 000 I 15 GND 03 VCC 16 IFWDAT 010 O 04 IFDASL 010 O 17 GND 05 VCC 18 IFWEN 010 O 06 DSKCHG 000 I 19 GND 07 VCC 20 IFTRK0 000 I 08 IFRADY 000 I 21 GND 09 IFHMED 000 I 22 IFWPRO 000 I 10 IFAMON 010 O 23 GND 11 IFLOD1 010 O 24 IFRDAT 000 I 12 IFDIRC 010 O 25 GND 13 GND 26 IFSSEL 010 O ...

Page 155: ...0 I O 35 HDDLED 000 O 11 SD03 100 I O 36 GND 12 SD12 100 I O 37 VCC 13 SD02 100 I O 38 VCC 14 SD13 100 I O 39 GND 15 SD01 100 I O 40 ATSLCT 100 I 16 SD14 100 I O 41 VCC 17 SD00 100 I O 42 IPSCLK 110 I 18 SD15 100 I O 43 IPSDAT 100 O 19 GND 44 GND 20 GND 45 MOUSDT 100 I O 21 IOWR I 46 MOUSCK 120 I O 22 GND 47 GND 23 IORD I 48 IPSSWL 000 I 24 GND 49 IPSSWR 000 I 25 IOCRDY O 50 GND C 7 PJ6 Serial I F...

Page 156: ...I O Pin Signal I O 01 KBOT00 001 O 11 KBRT7 100 I 02 KBOT01 010 O 12 KBOT03 010 O 03 KBOT02 010 O 13 KBOT04 010 O 04 KBRT0 100 I 14 KBOT05 010 O 05 KBRT1 100 I 15 KBOT06 010 O 06 KBRT2 100 I 16 KBOT07 010 O 07 KBRT3 100 I 17 KBOT08 010 O 08 KBRT4 100 I 18 KBOT09 010 O 09 KBRT5 100 I 19 KBOT10 010 O 10 KBRT6 100 I ...

Page 157: ...000 O 12 PCA08 100 O 46 PCA17 100 O 13 PCA13 100 O 47 PCA18 100 O 14 PCA14 100 O 48 PCA19 100 O 15 PCWE 000 O 49 PCA20 100 O 16 PCBSY 000 I 50 PCA21 100 O 17 MCVCC 51 MCVCC 18 MCVPP1 52 MCVPP2 19 PCA16 100 O 53 PCA22 100 O 20 PCA15 100 O 54 PCA23 100 O 21 PCA12 100 O 55 PCA24 100 O 22 PCA07 100 O 56 PCA25 100 O 23 PCA06 100 O 57 NC 24 PCA05 100 O 58 PCRST 100 O 25 PCA04 100 O 59 PCWAIT 000 I 26 PC...

Page 158: ...RST 130 I 26 LD2 130 I 07 PNEL0 100 I O 27 GND 08 GND 28 LD1 130 I 09 GND 29 GND 10 GND 30 LD0 130 I 11 GND 31 GND 12 B0 130 I 32 SCLK 140 I 13 GND 33 GND 14 B1 130 I 34 FP 130 I 15 GND 35 GND 16 B2 130 I 36 FR 130 I 17 GND 37 LD3 130 I 18 UD1 130 I 38 LP 130 I 19 GND 39 LCDV 20 UD0 130 I 40 LCDV C 11 PJ13 DC IN Connectors 3 Pin Table C 11 DC IN Connector Pin Assignment 3 Pin Pin Signal I O Pin Si...

Page 159: ...12 B3V O 37 VCC O 13 GND 38 VCC O 14 GND 39 VCC O 15 CPU3V O 40 VCC O 16 CPU3V O 41 VCC O 17 GND 42 GND 18 ENVCC O 43 DSPV O 19 GND 44 DSPV O 20 SRBTN 000 O 45 GND 21 SUSSTA 011 I 46 P 12V I 22 LOWBAT 100 O 47 CMHDON 000 O 23 PSSMI 000 O 48 N 9V I 24 PSBUSY 000 O 49 IPSSWL 000 O 25 PSBEEP 000 O 50 IPSSWR 000 O C 13 PJ16 LED ICON Connectors 12 Pin Table C 13 LED Icon Connector Pin Assignment 12 Pin...

Page 160: ...RDAT 010 O 47 GND 12 IFLD01 000 O 48 GND 13 IFAMON 000 O 49 GND 14 MOUSCK 120 I O 50 GND 15 EXKBCK 110 I O 51 RTS1 110 O 16 CTS1 110 I 52 VCC 17 DSR1 110 I 53 DCIN I 18 DCIN I 54 DCIN I 19 DCIN I 55 DCIN I 20 DCIN I 56 GND 21 RXD1 010 I 57 TXD1 010 O 22 DTR1 110 O 58 RI1 110 I 23 DCD1 110 I 59 MOUSDT 100 I O 24 GND 60 GND 25 EXKBDT 100 I O 61 PRCHEK 000 I O 26 IFWEN 000 O 62 IFHMED 010 I 27 IFRADY...

Page 161: ...C 10 T3400C T3400CT ...

Page 162: ...T3400 T3400CT D 1 Appendix D USA Display Codes Table D 1 USA Display Codes ...

Page 163: ...D 2 T3400 T3400CT ...

Page 164: ...0 4E 13 0D 8D 55 F0 55 15 BkSp 0E 8E 66 F0 66 16 Tab 0F 8F 0D F0 0D 17 Q 10 90 15 F0 15 18 W 11 91 1D F0 1D 19 E 12 92 24 F0 24 20 R 13 93 2D F0 2D 21 T 14 94 2C F0 2C 22 Y 15 95 35 F0 35 23 U 16 96 3C F0 3C 2 24 I 17 97 43 F0 43 2 25 O 13 98 44 F0 44 2 26 P 19 99 4D F0 4D 2 27 1A 9A 54 F0 54 28 1B 9B 5B F0 5B 29 42 2B AB 5D F0 5D 5 30 Caps Lock 3A BA 58 F0 58 31 A 1E 9E 1C F0 1C 32 S 1F 9F 1B F0 ...

Page 165: ... 33 B3 41 F0 41 2 54 34 B4 49 F0 49 2 55 35 B5 4A F0 4A 2 57 Shift R 36 B6 59 F0 59 58 Ctrl 1D 9D 14 F0 14 3 60 Alt L 38 B8 11 F0 11 3 61 Space 39 B9 29 F0 29 62 ALT R E0 38 E0 B8 E0 11 E0 F0 11 75 Ins E0 52 E0 D2 E0 70 E0 F0 70 1 76 Del E0 53 E0 D3 E0 71 E0 F0 71 1 79 E0 4B E0 CB E0 6B E0 F0 6B 1 80 Home E0 47 E0 C7 E0 6C E0 F0 6C 1 81 End E0 4F E0 CF E0 69 E0 F0 69 1 83 E0 48 E0 C8 E0 75 E0 F0 7...

Page 166: ... 119 F8 42 C2 0A F0 0A 120 F9 43 C3 01 F0 01 121 F10 44 C4 09 F0 09 122 F11 57 D7 78 F0 78 3 123 F12 58 D8 07 F0 07 3 124 PrintSc 6 6 6 6 6 126 Pause 7 7 7 7 7 202 Fn 4 Notes 1 Scan codes differ by mode 2 Scan codes differ by overlay function 3 Combination with Fn key makes different codes 4 Fn key does not generate a code by itself 5 This key corresponds to key No 42 in 102 key model 6 Refer to T...

Page 167: ...Table E 2 shows scan codes with the left Shift key In combination with the right Shift key scan codes are changed as listed below With left Shift With right Shift Set 1 E0 AA E0 B6 E0 2A E0 36 Set 2 E0 F0 12 E0 F0 59 E0 12 E0 59 Table E 3 Scan Codes in Numlock Mode Cap Key Code set 1 Code set 2 No top Make Break Make Break 75 INS E0 2A E0 52 E0 02 E0 AA E0 12 E0 70 E0 F0 70 E0 F0 12 76 DEL E0 2A E...

Page 168: ... F0 6C 09 8 8 48 C8 75 F0 75 10 9 9 49 C9 7D F0 7D 11 0 37 B7 7C F0 7C 23 U 4 4B CB 6B F0 6B 24 I 5 4C CC 73 F0 73 25 O 6 4D CD 74 F0 74 26 P 4A CA 7B F0 7B 37 J 1 4F CF 69 F0 69 38 K 2 50 D0 72 F0 72 39 L 3 51 D1 7A F0 7A 40 4E CE 79 F0 79 52 M 0 52 D2 70 F0 70 53 33 B3 41 F0 41 54 53 D3 71 F0 71 55 E0 35 E0 B5 40 4A E0 F0 4A Table E 6 Scan Codes with Ctrl Key Key Code set 1 Code set 2 top Shift ...

Page 169: ... T3400CT Table E 7 Scan Codes with Alt Key Key Code set 1 Code set 2 top Shift Make Make Pause Common E1 ID 45 E1 SD C5 E1 14 77 E1 F0 14 F0 77 Ctrl E0 46 E0 C6 E0 7E E0 F0 7E This key generates only make codes ...

Page 170: ...Appendix F Key Layout F 1 United States US Keyboard Figure F 1 US Keyboard F 2 United Kingdom UK Keyboard Figure F 2 UK Keyboard T3400 T3400CT F 1 ...

Page 171: ...F 2 T3400 T3400CT F 3 German GR Keyboard Figure F 3 GR Keyboard F 4 French FR Keyboard Figure F 4 FR Keyboard ...

Page 172: ...T3400 T3400CT F 3 F 5 Spanish SP Keyboard Figure F 5 SP Keyboard F 6 Italian IT Keyboard Figure F 6 IT Keyboard ...

Page 173: ...F 4 T3400 T3400CT F 7 Scandinavian SC Keyboard Figure F 7 SC Keyboard F 8 Swiss German SL Keyboard Figure F 8 SL Keyboard ...

Page 174: ...T3400 T3400CT F 5 F 9 Canadian Specialized Keyboard Figure F 9 Canadian Keyboard F 10 Keycap Number Keyboard Figure F 10 Keycap Number Keyboard ...

Page 175: ...F 6 T3400 T3400CT ...

Page 176: ...E 3 PD1 17 SLIN 2 PD0 11 BUSY Figure G 1 Printer Wraparound Connector G 2 RS 232C Wraparound Connector 3 TD 2 RD 7 RTS 8 CTS 1 CD 4 DTR 6 DSR 9 RI Figure G 2 RS 232C Wraparound Connector G 3 RS 232C Direct Cable 9 Pin to 9 Pin 3 TD 2 RD 4 DTR 6 DSR 8 CTS 9 RI 7 RTS 1 CD 5 GND 5 GND 2 RD 3 TD 1 CD 7 RTS 6 DSR 4 DTR 8 CTS 9 RI Figure G 3 RS 232C Direct Cable 9 pin to 9 pin ...

Page 177: ... T3400 T3400CT G 4 RS 232C Direct Cable 9 Pin to 25 Pin 1 CD 4 RTS 2 RD 2 TD 3 TD 3 RD 4 DTR 5 CTS 6 DSR 22 RI 5 GND 7 GND 7 RTS 8 CD 6 DSR 20 DTR 8 CTS 9 RI Figure G 4 RS 232C Direct Cable 9 pin to 25 pin ...

Page 178: ... Turn off power to the T3400 3400CT 3 Remove the optional PCMCIA card and all external cables except the AC adapter 4 Connect the external 3 5 inch FDD 5 Turn on power while holding down the F12 key Hold down the key until the system speaker beeps 6 When the BIOS update message is displayed insert the BIOS rewriting disk into the FDD Press the Enter key to start the BIOS rewriting 7 When the proce...

Page 179: ...H 2 T3400 T3400CT ...

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