Toshiba T-Series T4500 User Manual Download Page 48 | Manualshive

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2-24

Check 2:

Replace the System PCB with a new one following the instructions in Chapter 4,
Replacement Procedures.

2.7

Keyboard Troubleshooting

To determine if the computer’s keyboard is functioning properly, perform the following proce-
dures. Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: Diagnostic Test Program Execution Check

Procedure 2: Connector and Replacement Check

Procedure 1

Diagnostic Test Program Execution Check

Execute the Keyboard Test in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics,
for more information on how to initiate the test program.

If an error occurs, go to Procedure 2. If an error does not occur, 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 discon-
nected or damaged. Disassemble the computer 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.

Keyboard cable

PJ12
System board

If this cable is damaged, replace the keyboard with a new one. If the cable is discon-
nected, firmly connect it. Perform Procedure 1 again. If the keyboard is still not
functioning properly, perform Check 2.

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Summary of Contents for T-Series T4500

Page 1: ...1 44 Mbytes and 2DD floppy disks 720 Kbytes Memory The T4500 T4600 Family 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 the Lotus Intel Microsoft Expanded Memory Specifications LIM EMS Monochrome LCD T4500 T4600 A high resolution Liquid Crystal ...

Page 2: ...t a Centronics compatible printer or an external 5 25 inch floppy disk drive T4600 T4600C s port is a parallel interface only and does not support an external floppy disk drive RS 232 C port The T4500 T4600 Family has one 9 pin serial interface port Mouse port The T4500 T4600 Family has one 6 pin mouse port on the back that can be connected to an IBM PS 2 mouse Keyboard port The T4500 T4600 Family...

Page 3: ...is shown in Figure 1 1 The T4500 T4500C system configuration is shown in Figure 1 2 and the T4600 T4600C system configuration is shown in Figure 1 3 Figure 1 1 T4500 T4600 Family Personal Computer Figure 1 2 T4500 T4500C System Unit Configuration ...

Page 4: ...1 4 Figure 1 3 T4600 T4600C System Unit Configuration ...

Page 5: ...1 5 1 2 System Unit Block Diagram Figure 1 4 is a block diagram of the T4500 T4500C system unit Figure 1 4 T4500 T4500C System Board Block Diagram ...

Page 6: ...mory are used for the calendar and clock The remaining 114 bytes are used for the system configuration data A Keyboard Controller KBC One M37452M4 chip is used This KBC includes the keyboard scan controller and key board interface controller The KBC controls the internal keyboard external keyboard port PS 2 mouse port and ball point quick port Memory configurations Standard RAM 4 MB Cache memory 8...

Page 7: ...ce Controller Compatible Access Controller DMAC Controller I O Controller Address Latch Controller 32 Bit 16 Bit Controller Address Latch DMA Address Generator Refresh Address Generator I O Register Compatible I O Port Saving the data of the Register in resume Controller Toshiba Special Register 20 MHz 10 MHz Controller Data Bus Change Controller Data Latch Sub LCD Controller Gate Array This gate ...

Page 8: ...odem Card Controller EEPROM for security Controller KBC Security EEPROM Communication Controller Others KBC Communication Controller Disable the PRT FDD Port HDD Access Controller Suspend Resume Controller The block diagram of the T4600 and T4600C system board is shown in Figure 1 5 Figure 1 5 T4600 T4600C System Board Block Diagram ...

Page 9: ...65 equivalent One VFO TC8568 equivalent One speaker controller A Keyboard Controller KBC M37452M4 This KBC includes the keyboard scan controller and keyboard interface controller The KBC controls the internal keyboard external keyboard port PS 2 mouse port and ball point quick port The following memories Standard RAM 4 MB Cache memory 8 KB inside CPU BIOS ROM 128 KB 96 KB are used This Read Only M...

Page 10: ...lowing functions Status Indicator Panel Controller LCD Segment Flashing Controller Internal Communication Controller KBC Power Supply Micro Processor Main CPU Communication Controller KBC Power Supply Micro Processor Interrupt Controller IC Card Controller Gate Array This gate array has the following functions IC Card Controller Two cards support PCMCIA Card Controller Toshiba Modem Card Controlle...

Page 11: ...pecifications for the FDD are de scribed in Table 1 1 Figure 1 6 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 Rotati...

Page 12: ...320 MB CP2084 MK1422FCV CP2124 MK2124FC MK2224FC MK2326FC Storage capacity MB Formatted 85 4 86 0 121 6 130 1 213 0 340 0 Number of disks 2 1 2 2 2 3 Data heads 4 2 4 4 4 6 Data surfaces 4 2 4 4 4 6 Tracks per surface 1 150 1 501 1 123 1 155 1 560 1 830 Sectors per track 38 1 56 1 53 1 55 1 Bytes per sector 512 512 512 512 512 512 Access time ms Track to track 5 3 3 5 3 3 Average 19 15 16 17 12 12...

Page 13: ...s mounted on the T4500 T4600 Family system unit The keyboard is connected to the keyboard controller on the system board through a 19 pin flat cable The keyboard is shown in Figure 1 8 See Appendix F for optional keyboard configurations Figure 1 8 Keyboard ...

Page 14: ...he Video Graphics Array VGA The LCD receives vertical and horizontal synchronizing signals 8 bit data signals 4 bit upper data signal and 4 bit lower data signal and shift clock for data transmission All signals are CMOS level compatible The sidelit LCD is shown in Figure 1 9 and its specifications are described in Table 1 3 Figure 1 9 Sidelit LCD Table 1 3 Sidelit LCD Specifications Item Specific...

Page 15: ...h frequency current needed to illuminate the FL The specifications for the FL inverter board are described in Table 1 4 Table 1 4 FL Inverter Board Specifications Item Specifications Input Voltage VDC 10 Power W 2 6 Output Voltage VAC 1 100 Current mA 5 0 Frequency KHz 42 Current limits mA 2 5 5 0 ...

Page 16: ...s vertical and horizontal synchronizing signals 9 bit data signals data enable signals and shift clock for data transmission The T4600C 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 10 The specifications for the LCD are described in Table 1 5 Figure 1 10 TFT Color LCD Table 1 5 TFT ...

Page 17: ...nt to light the LCD s Fluorescent Lamp The specifications for the FL inverter are described in Table 1 6 Table 1 6 FL Inverter Board Specifications Item T4500C T4600C Input Voltage VDC 10 18 Power W 6 6 Output Voltage VAC 1 100 1 100 Current mA 5 0 5 0 Frequency KHz 47 47 Current limits mA 3 0 to 5 0 3 0 to 5 0 ...

Page 18: ...ntrols the Battery capacity icon Power on icon and AC adapter icon on the status indica tor panel 5 Turns the battery charging system on and off and detects a fully charged battery 6 Determines if the power can be turned on and off 7 Provides more accurate detection of a low battery 8 Calculates the remaining battery capacity The power supply board output rating is specified in Table 1 7 Table 1 7...

Page 19: ... 9 6 V 3 000mAH T4600 T4600C Backup battery Nickel Metal Hydride 1 2 V 1 100 mAH RTC battery Lithium Vanadium 3 0 V 50 mAH 1 9 1 Main Battery The removable main battery pack is the computer s main power source when the AC adapter is not attached The main battery recharges the backup battery when the system s power is on The backup and main battery maintain the state of the computer when you enable...

Page 20: ...AC adapter is attached No light The AC adapter is disconnected from the computer or the AC adapter is attached but it cannot charge the battery for one of the following reasons The battery is extremely hot Allow the computer and the battery to reach room temperature before attempting to charge the battery The battery is almost fully discharged The battery will not begin charging immediately in thi...

Page 21: ...0 kΩ 1 at 25 C Operating temperature limits 50 100 C Thermal protector When the temperature falls outside the operating range of 60 to 75 C the thermal protec tor reduces the current by increasing the internal resistance Thermal Fuses If the temperature exceeds 91 C the thermal fuses may blow to protect the battery and the system WARNING Never try to use a battery unless its fuses are intact Do no...

Page 22: ...ickle charge Quick Battery Charge When the AC adapter is attached there are two types of quick charge quick charge 1 when the system is powered off and quick charge 2 when the system is powered on Table 1 10 Quick Charge Times Kind of battery Charging time Quick charge 1 Nickel Cadmium About 1 hour 10 minutes power off Nickel Metal Hydride About 1 hour 30 minutes Quick charge 2 Nickel Cadmium 1 5 ...

Page 23: ...used to back up the AutoResume or Hard RAM data is determined according to the following priority AC adapter Main battery Backup battery The backup battery is charged by the main battery or AC adapter when the system is powered on Table 1 11 shows the charging time and data preservation period of the backup battery Table 1 11 Backup Battery Charging Data Preservation Time Time Charging Time Power ...

Page 24: ...1 24 ...

Page 25: ...d reassembly procedures are given in Chapter 4 Replacement Procedures The following tools are necessary for implementing the troubleshooting procedures 1 A T4500 T4500C Diagnostics Disk or T4600 T4600C Diagnostics Disk 2 A Phillips head screwdriver 2 mm 3 A Toshiba MS DOS system disk 4 A 2DD or 2HD formatted work disk for floppy disk drive testing 5 A cleaning kit for floppy disk drive troubleshoo...

Page 26: ...if a password is registered and if it is ask him or her to enter it If the user has forgotten the password refer to Appendix H for information on password deletion 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 optional equipment is disconnected from the computer Make sure the floppy disk ...

Page 27: ...Does the MEMORY TEST XXXKB message pro ceed from 0KB and 640KB Is Toshiba MS DOS being loaded Does the Battery LED glow Perform the Power Supply Troubleshooting procedures in Section 2 3 Perform the Power Supply Troubleshooting procedures in Section 2 3 Perform the Power Supply Troubleshooting procedures in Section 2 3 Perform the System PCB Troubleshooting procedures in Section 2 4 Perform the Di...

Page 28: ...the Keyboard Troubleshooting proce dures in Section 2 7 3 If an error is detected on the floppy disk test perform the Floppy Disk Drive Troubleshoot ing procedures in Section 2 5 4 If an error is detected on the hard disk test perform the Hard Disk Drive Troubleshooting procedures in Section 2 6 Do typed characters appear correctly Is an error detected by any of the diagnostic tests Perform each t...

Page 29: ...Desk Station IV connection status System power on status Remaining battery power If an error status is displayed on the Status Indicator Panel perform Check 1 If the Battery LED Indicator is flashing red or not glowing go to Procedure 2 If the three icons listed above are not displayed go to Procedure 3 NOTE The power supply microprocessor monitors the status of the power supply When it detects an...

Page 30: ... VCC Voltage is output at a low level does not fall to zero while the power is off B3V Output Status Meaning P30 B3V Voltage is over the maximum allowable limit P31 B3V Voltage is below the minimum allowable limit P32 B3V Voltage is not within the normal range while the system is on P33 B3V Voltage is not within the normal range while the system is in the resume mode or Hard RAM is enabled Output ...

Page 31: ...esk Station IV with a new one If the status still exists go to Check 4 Check 3 When P01 is displayed perform the following steps 1 Make sure the AC adapter s cable and AC cord are firmly plugged into the DC IN 15 V socket and wall outlet If these cables are connected correctly proceed to step 2 2 Connect a new AC adapter If the status still exists go to Check 4 Check 4 When P10 is displayed perfor...

Page 32: ...is connected and the battery is being charged If the Battery LED indicator flashes red only 10 times the sub LCD Status Indicator Panel controller gate array on the System PCB or Power supply microprocessor may be malfunctioning Go to Procedure 4 If the Battery LED indicator does not glow go to Check 1 Check 1 Make sure the AC adapter s cable and AC cord are firmly plugged into the DC IN 15V socke...

Page 33: ...Make sure the battery pack is installed in the computer correctly If the battery pack is installed correctly go to Check 4 Check 4 Install a new battery pack If the Battery Charging Status indicator still does not change go to Section 2 9 Status Indicator Panel Troubleshooting Procedure 4 System PCB Replacement Check The System PCB incorporates both the system board and the power supply board into...

Page 34: ...oshiba MS DOS is properly loaded go to Procedure 3 Check 1 If one of the following error messages is displayed on the screen press the F1 key as the message instructs These errors occur when the system configuration preserved in the RTC memory CMOS type memory is not the same as the actual configuration or when the data is lost If you press the F1 key as the message instructs the system configurat...

Page 35: ...MUST FORMAT HARD RAM BEFORE USE PRESS ANY KEY TO CONTINUE Check 3 The IRT checks the system board When the IRT detects an error the system stops or an error message appears If one of the following error messages 1 through 17 19 20 25 or 26 is displayed replace the System PCB If error message 18 is displayed go to the Keyboard Troubleshooting procedures in section 2 7 If error message 21 or 22 is d...

Page 36: ...24 FDD ERROR 25 TIMER INTERRUPT ERROR 26 RTC UPDATE ERROR Procedure 2 Printer Port LED Check The printer port LED displays the IRT status and test status by turning lights on and off as an eight digit binary value Figure 2 2 shows the printer port LED NOTE When you perform this check the external FDD PRT T4500 and T4500C or parallel port T4600 and T4600C option in the SETUP program must be set to ...

Page 37: ...the computer 5 Convert the status from binary to hexadecimal notation 6 If the final LED status is FFh normal status go to Procedure 3 7 If the final LED status matches any of the test status values in Table 2 2 perform Check 1 NOTE If an error condition is detected by the IRT test the printer port LED displays an error code after the IRT test ends For example when the printer port LED displays 22...

Page 38: ...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 WRITE DATA XXXXXXXXH SYSTEM MEMORY PARITY ERROR ADDRESS XXXX0000H XXXXFFFFH 30H Extended...

Page 39: ...ng procedures in Section 2 6 Check 4 If Error Code 60h is displayed go to the Floppy Disk Drive Troubleshooting proce dures in Section 2 5 Error status Test item Message 4AH PIC test PIC 1 ERROR READ DATA XXH WRITE DATA XXH PIC 2 ERROR READ DATA XXH WRITE DATA XXH 54H Keyboard test KEYBOARD ERROR 55H KBC initialization KBC ERROR 5AH Mouse initialization 60H HDD initialization HDC ERROR HDC 0 ERROR...

Page 40: ...ed Disassemble the T4500 T4600 Family computer following the steps described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Replace the System PCB Refer to Chapter 4 for instructions on how to remove and replace the unit Check 2 If normal operation is restored after replacing the System PCB the original unit is probably defective Check 3 If normal operation is not res...

Page 41: ...to Procedure 3 If the test program cannot be executed on the T4500 series go to Procedure 2 If the test program cannot be executed on the T4600 series go to Procedure 4 Procedure 2 External 5 25 inch FDD Check T4500 or T4500C only NOTE The T4600 or T4600C T4600 series does not support an external FDD Therefore all references to an external FDD 3 5 inch or 5 25 inch relate to the T4500 or T4500C T4...

Page 42: ... and that the write protect tab is disabled If any other errors occur while executing the FDD diagnostics test go to Check 1 Table 2 4 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...

Page 43: ... perform the following checks Check 1 Make sure the FDD cable is firmly connected to the system board FDD PJ4 System board If this cable is disconnected connect it to the System PCB and repeat Procedure 3 If the FDD is still not functioning properly perform Check 2 Check 2 The FDD or its attached cable may be defective or damaged Replace the FDD with a new one following the steps in Chapter 4 Repl...

Page 44: ...k and turn on the computer Then perform the following checks Check 1 Type C and press Enter If you cannot change to Drive C go to Check 2 If you can change to Drive C go to Procedure 2 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 ...

Page 45: ...do not appear perform Check 3 Insert system disk in drive Press 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 trans ferred to the HDD Restart the computer If the error message still a...

Page 46: ...com plete Partition and format the HDD using the MS DOS FORMAT command Format complete If you cannot format the HDD using the Test and Diagnostic program go to Procedure 4 Procedure 4 Diagnostic Test Program Execution Check The HDD test program is stored on the ASP Diagnostics Diskette Perform all of the HDD tests in the Hard Disk Drive Test Refer to Chapter 3 Tests and Diagnostics for more inform...

Page 47: ...2 23 11h ECC recover enable Check 1 Replace the HDD unit with a new one following the instructions in Chapter 4 Re placement Procedures If the HDD is still not functioning properly perform Check 2 ...

Page 48: ...nostics for more information on how to initiate the test program If an error occurs go to Procedure 2 If an error does not occur 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 discon nected or damaged Disassemble the computer as described in Chapter 4 Replacement Procedures and ...

Page 49: ...nged by using Hot keys If the display is blank go to Check 1 If you cannot change the brightness and contrast go to Check 3 NOTE The contrast control is effective only on the T4500 or T4600 monochrome LCD You cannot change the contrast on the T4500C or T4600C Color LCD If the contrast does not change when you execute the following checks perform Procedure 2 Check 1 Pressing Fn F5 selects the activ...

Page 50: ...the same problem as the internal LCD the display controller may be damaged Go to Procedure 3 Procedure 3 Diagnostic Test Program Execution Check The Display Test program is stored on the ASP Diagnostics Diskette This program checks the display controller on the system board After loading Toshiba MS DOS run the Diagnostics Decreases the contrast of the LCD panel This key is effective only on the T4...

Page 51: ...bles may be disconnected Disassemble the display unit and check the following cable connections Refer to Chapter 4 Replacement Procedures for more information about how to disassemble the computer Figure 2 3 T4500 T4600 Display Connection Figure 2 4 T4500C T4600C Display Connection Status indicator Panel PJ6 PJ43 PJ11 PJ13 T4500 PJ44 T4600 PJ17 PJ45 PJ10 System PCB FL Inverter board CN2 CN1 Displa...

Page 52: ... 3 If the FL or FL unit remains lit when the display is closed perform Check 4 Check 1 Replace the FL T4500 or T4600 or FL unit T4500C or T4600C with a new one and test the display again If the problem still exists perform Check 2 Check 2 Replace the FL inverter board with a new one and test the display again If the prob lem still exists perform Check 3 Check 3 Replace the LCD module with a new on...

Page 53: ... Procedure 2 If an error does not occur the keyboard is functioning properly Procedure 2 Connector and Replacement Check The status indicator panel is connected to the system board This cable may be disconnected or damaged Disassemble the computer 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 t...

Page 54: ...URATION SETUP The DIAGNOSTIC TEST option contains the following nine functional tests SYSTEMTEST MEMORYTEST KEYBOARDTEST DISPLAYTEST FLOPPYDISKTEST PRINTERTEST ASYNCTEST HARDDISKTEST REALTIMERTEST You will need the following equipment to perform some of the Diagnostic test programs The ASP Diagnostics Diskette all tests A formatted working disk for the floppy disk drive test all tests 3 5 inch 2HD...

Page 55: ...ostics program you must Deactivate the line in the CONFIG SYS file that loads the device driver for the expanded memory manager by using the DOS batch command REM You may also rename the CONFIG SYS file to keep it from executing upon bootup Reboot the computer Insert the ASP Diagnostics diskette into the FDD and continue with Step 2 above When testing is complete don t forget to restore the CONFIG...

Page 56: ... Specify Esc Exit Refer to Sections 3 4 through 3 13 for detailed descriptions of Diagnostic Tests 1 through 10 Function 88 sets the floppy disk drive and hard disk drive error retry count Function 99 exits the submenus of the Diagnostic Test and returns to the Diagnostic Menu 4 Select the option you want to execute and press Enter The following message will appear SYSTEM TEST XXXXXXX T4X00 DIAGNO...

Page 57: ...error is found and desplays 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 the test program and exits to the subtest menu 2 Continues the test 3 Restarts the test from the beginning Use the arrow keys to move the cursor to the desired option an...

Page 58: ...PCMCIA memory 1 MB SRAM 2 MEMORY 01 RAM constant data T4600 T4600C 02 RAM address pattern data only 03 RAM refresh 04 Protected mode 05 Memory module 07 Hard RAM 08 Cache memory 3 KEYBOARD 01 Pressed key display 82 84 02 Pressed key code display 03 PS 2 Mouse connect check 04 DCBP connect check 4 DISPLAY 01 VRAM write read 02 Character attributes 03 Character set 04 80 25 30 Character display 05 3...

Page 59: ...ard 02 Board 1 board 2 T4500 4500C only 03 Point to point send 04 Point to point receive 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 0...

Page 60: ...s and displays the hardware status as shown below 76543210 H W status 10001000 Bit7 Bit6 CPU clock xxMHz 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 describes the hardware bit status for each bit tested Pressing Enter returns you to the Sub Test Menu Table 3 2 Hardware Bit Status Bit H W status 1 0 7 Reserved 6 CPU clock s...

Page 61: ...t data version to the reference data version which is stored in the test program When the read information is lower than the reference data the test program displays the following screen image To exit this screen press the S key When the read information is higher it indicates nothing 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 Referen...

Page 62: ...ffset in conventional memory 0 program end to 640 KB then reads the new data and compares the result with the 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 the original data The constant data is AAAAh and 5555h NOTE There is a short delay between write and r...

Page 63: ...test item Subtest 07 Hard RAM This subtest writes a word unit of constant data to memory address E0000h to E7FFFh then reads the new data and compares the result with the original data The constant data is 0000h 5555h AAAAh and FFFFh Also this subtest executes the paging test for page data Subtest 08 Cache Memory To test the cache memory a pass through write read comparison of 5A data is run repea...

Page 64: ...you want to execute and press Enter Subtest 01 Pressed Key Display 82 84 NOTE The Num Lock and the Overlay mode must be off to execute this subtest When you execute this subtest the keyboard layout is drawn on the display as shown below When any 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 s disp...

Page 65: ... keytop names are shown in Appendix E KEYBOARD TEST IN PROGRESS 302000 Scan code Character code Keytop Ins Lock Caps Lock Num Lock Scroll Lock Alt Ctrl Left Shift Right Shift PRESS Enter KEY Subtest 03 PS 2 Mouse Connection Check NOTE To execute the PS 2 mouse connection check a PS 2 mouse must be connected to the PS 2 mouse port This subtest checks whether a PS 2 mouse is connected or not If this...

Page 66: ...ball point mouse must be con nected to the Ball point Quick Port BPQP This subtest checks whether a ball point mouse is connected or not If this test does not detect an error it returns to the subtest menu If it detects an error the following message appears KBD DCBP INTERFACE ERROR HALT OPERATION 1 Test end ...

Page 67: ... 13h This subtest displays the following character attribute modes normal intensified reverse and blinking as shown in the display below The character attribute modes display the foreground color 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 display below appears on the screen when this subtest is executed...

Page 68: ... in the 40 25 character mode as shown below Pressing Enter toggles between the two tests To exit this subtest and return to the DISPLAY TEST menu press Ctrl Break To exit this subtest and return 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 INT...

Page 69: ...BCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxy 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 23456789 ABC...

Page 70: ... the DISPLAY TEST menu press Ctrl Break Subtest 07 640x350 400 480 Character Display mode 10 74 12 This subtest displays even dots odd dots and all dots in the 640 350 640 400 and 640x480 dot graphics mode 10 12 as shown below 640 400 GRAPHICS DISPLAY XX EVEN DOTS ODD DOTS ALL DOTS DRIVEN DRIVEN DRIVEN PRESS ENTER KEY 640 XXX GRAPHICS DISPLAY XX EVEN DOTS ODD DOTS ALL DOTS DRIVEN DRIVEN DRIVEN PRE...

Page 71: ...HHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHH...

Page 72: ...AC pallet W R CMP test about 5 seconds Processor latch test Processor latch test 1 256 times 2 endless To exit press Ctrl Break Then press Enter Subtest 11 TFT color display This subtest displays seven screens The first shows many colors at once the next three display 64 shades of red green and blue successively and the last three dis play 256 shades of red green and blue Press Enter to change the...

Page 73: ...2 2 Select the media type of the floppy disk in the test drive 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 you want the test to start on and press Enter Simply pressing Enter sets the start track to zero Test start track Enter 0 dd 00 79 4 The floppy disk test menu will appear after you select the start track number Select the number of the s...

Page 74: ...art track is specified when the FDD test is started from the Diagnostic 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 The data is then read and compared to the original data Subtest 03 Random Address Data This Subtest writes r...

Page 75: ...channels Select the printer channel number and press Enter to execute the selected 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 _ abcdefghijklm 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmn 0123456789 ABCDEFGHIJKLMNOPQR...

Page 76: ...d NOTE To execute this subtest a printer wraparound connector must be connected to the computer s printer port The wiring diagram for the printer wraparound connector 34M741986G01 can be found in Appendix G PRINTER TEST 1 THIS LINES SHOWS NORMAL PRINT 2 THIS LINE SHOWS DOUBLE WIDTH PRINT 3 THIS LINE SHOWS COMPRESSED PRINT 4 THIS LINE SHOWS EMPHASIZED PRINT 5 THIS LINE SHOWS DOUBLE STRIKE PRINT 6 A...

Page 77: ...pear at the bottom of the screen when Subtests 01 03 04 and 05 are selected Channel 1 XXXXh Channel 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 serial port channel number and press Enter to start the subtest Subtest 01 Wraparound board NOTE To execute this subtest an RS 232 C wraparound connector 34M741621G01 must be...

Page 78: ...ed with Subtest 03 described above receives the data from the send side then sends the received data Subtest 05 Card Modem Loopback 2400BPS NOTES 1 To execute this subtest a 2400 bps card modem must be installed 2 You do not have to turn on power to the modem at the Setup option When you select this subtest the modem is powered on automatically 3 To execute this subtest you need to set the PCMCIA ...

Page 79: ...nly be executed after all other possibilities have been explored Before running the test transfer the contents of the hard disk to a backup system After the hard disk test is completed execute the Toshiba MS DOS FDISK command which will set the partition Then execute the Toshiba MS DOS FORMAT command Refer to the Toshiba MS DOS manual for details on all DOS commands 1 When you select the hard disk...

Page 80: ... and the last two digits indicate the sector The first digit of the STATUS number indicates the drive being tested and the last two digits indicate the error status code as explained in Table 3 3 in Section 3 14 Subtest 01 Sequential Read This subtest is a sequential reading of all the tracks on the HDD starting at Track 0 When all the tracks on the HDD have been read the test starts at the maximu...

Page 81: ...attern data to the CE cylinder on the HDD then reads the data from the CE cylinder and compares it with the original data Subtest 06 Write Specified Address This subtest writes specified data to a specified cylinder and head on the HDD Subtest 07 Read Specified Address This subtest reads data which has been written to a specified cylinder and head on the HDD Subtest 08 ECC Circuit This subtest che...

Page 82: ...te and press Enter Subtest 01 Real Time A new date and time can be input during this subtest To execute the real time subtest follow these steps 1 Select Subtest 01 and the following message will appear Current date XX XX XXXX Current time XX XX XX Enter new date 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 Th...

Page 83: ...compares this data with the original data To exit press Ctrl Break Subtest 03 Real Time Carry CAUTION When this subtest is executed the current date and time are erased This subtest checks the real time clock increments making sure the date and time are displayed in the following format Current date 01 01 1989 Current time 00 00 37 Pressing Enter displays the following ...

Page 84: ...O EXIT TEST Press Ctrl Break to exit 3 13 Co Processor Test NOTE Only the T4600 series has a built in co processor therefore only the T4600 Series can execute the co processor test Subtest 01 Co Processor Test This test checks the following functions of the co processor ...

Page 85: ...hecksum Error MEMORY 01 Parity Error 02 Protected Mode Not Change 14 Memory Read Write Error 1B H RAM Mapping Error 1C H RAM Read Write Error 29 No PCMCIA Card 2A PCMCIA Card Different 2B PCMCIA Mapping Error 2C PCMCIA Read Write Error DD Cache Memory Error KEYBOARD 03 Mouse Interface Error 04 DCBP Interface Error FDD 01 Bad Command 02 Address Mark Not Found 03 Write Protected 04 Record Not Found ...

Page 86: ... BUFFER Full Time Out 10 Parity Error 20 Framing Error 40 Overrun Error 80 Line Status Error 88 Modem Status Error 33 No Carrier Card Modem 34 Error Card Modem 36 No Dial Tone 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 09 DMA Boundary Error 0A Bad Sector 0B Bad Track Error 10 ECC Error 11 ECC Recover Enable 20 H...

Page 87: ...ler error status is composed of 2 bytes The first byte displays the contents of the HDC status register in hexadecimal form and the second byte displays the HDC error register The contents of the HDC status register and error register are described in Tables 3 4 and 3 5 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 Har...

Page 88: ...ex 1 Index is sensed 0 ERR 0 Other Error 1 The previous command was terminated with some error Table 3 5 Error Register Contents Bit Name Description 7 BBK1 0 Other Bad block mark 1 A bad block mark is detected 6 UNC 0 There is no uncorrectable data error Uncorrectable 1 Uncorrectable data error has been detected 5 Not used 4 IDNF 0 Other ...

Page 89: ...Before executing the function 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 about using the BACKUP command 3 16 1 Function Description 1 All Track FORMAT This option performs a low level format of all the tracks on the hard disk as shown in Table 3 6 below NOTE Before executing the all t...

Page 90: ...gram is complete If an error other than a bad track is detected the program is automatically terminated 3 16 2 Operations CAUTION The contents of the hard disk will be erased when this program is executed Before executing the function 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 about u...

Page 91: ...with unlock formats you must select 2 yes If 1 is selected with a JVC disk an error will be generated The system defaults to 1 and this message does not appear when other disks are installed Bad Track Register The bad track register prompt will appear as shown below Enter the cylinder and head numbers of bad tracks and press Enter Note that if there are no bad tracks pressing Enter alone is the sa...

Page 92: ... and head as indicated in the screen prompts shown below 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 3 Bad Track FORMAT To format a track as a bad track enter the number for the drive interleave cylinder and head as indicated in the screen prompt shown below Drive number select 1 1 2 2 Interl...

Page 93: ...r more information about using these commands 3 17 FDD Head Cleaning 3 17 1 Function Description This function cleans the heads in the FDD by executing a series of head load seek and read opera tions A cleaning kit is necessary to perform this function 3 17 2 Operations 1 Selecting Test 4 from the DIAGNOSTIC MENU and pressing Enter displays the following messages DIAGNOSTICS FLOPPY DISK HEAD CLEAN...

Page 94: ...e power switch is turned off the error information will be lost The error information is displayed in the following order 1 Error count CNT 2 Test name TS NAME 3 Subtest number TS NAME 4 Pass count PASS 5 Error status STS 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 Selecting 5 and pressing Enter in the...

Page 95: ...ta Error count Error status name 1 Next 2 Prev 3 Exit 4 Clear 5 Print 6 FD Log Read 7 FD Log Write 2 The error information displayed on the screen can be manipulated by the following number keys The 1 key scrolls the display to the next page The 2 key scrolls the display to the previous page ...

Page 96: ... several passes during the initial diagnosis We also recom mend several passes of the test as a final check or burn in to ensure no other malfunction exists 3 19 1 Function Description This function automatically executes the following tests in sequence 1 System test Subtest 01 2 Memory test Subtest 01 02 04 06 and 07 3 Display test Subtest 01 to 08 4 FDD test Subtest 02 5 HDD test Subtest 01 and ...

Page 97: ... printer wraparound connector must be connected to the printer port on the back of the computer to properly execute this test 3 Select Y or N and press Enter The following message will appear Serial A wraparound test Y N Selecting Y yes executes the Async wraparound test An RS 232 C wraparound connector must be connected to the serial port on the back of the computer to properly ...

Page 98: ...5 inch relate to the T4500 T4500C Computer FORMAT NOTE This program is only for testing a floppy disk drive This option is different from the Toshiba MS DOS FORMAT command This program can format a external 5 25 inch T4500 T4500C or internal 3 5 inch floppy disk in the following formats 2D Double sided double density 48 67 5 TPI MFM mode 512 bytes 9 sectors track 2DD Double sided double density do...

Page 99: ...e type number and press Enter A message similar to the one below will be displayed Warning Disk data will be destroyed Insert work disk into drive A Press any key when ready 4 Remove the Diagnostics Disk from the FDD insert a 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 h...

Page 100: ...the source disk from the FDD insert a formatted work disk and press any key The track head XXX X message will appear and start copying to the target disk When the amount of data is too large to be copied in one operation the message from Step 2 is displayed again After the floppy disk has been copied the following message will appear Copy complete Another copy 1 Yes 2 No 5 To copy another disk sel...

Page 101: ...lay the following message Format type select 0 2DD 1 2D 2 2HD 4 Select a media type number and the following message will appear Insert source disk into drive A Press any key when ready 5 Insert a source disk and press any key and the following message will appear ...

Page 102: ...rmation for the T4500 T4600 Family computer BIOS ROM version Boot ROM version KBC version Base memory size The number of floppy disk drives The number of ASYNC ports The number of hard disk drives The number of printer ports Extended Memory Size PS Micom Version Battery 3 21 2 Operations Selecting 8 from the DIAGNOSTIC MENU and pressing Enter displays the following system configuration SYSTEM CONF...

Page 103: ...0C s current system setup information as listed below System setup information for the T4600 T4600C is listed on the next page 1 Memory Total Base Extended Memory Hard RAM Shadow BIOS ROM 2 Display Display Adapter LCD Display Mode Display Color T4500C only LCD Gray Scale Level T4500 only 3 Battery Battery Save Mode Battery Display Manual Setting of Battery Level 4 Hard Disk 5 COM PCMCIA FDD PRT Se...

Page 104: ...Total Base Extended Memory Hard RAM Shadow BIOS ROM 2 Display Display Adapter LCD Display Mode Display Colors T4600C only LCD gray Scale Level T4600 only Power On Display 3 PCMCIA COM PRT PC Card Slot 1 PC Card Slot 2 Serial Port Parallel Port External FDD when connected to a Desk Station Printer Port Type when connected to a Desk Station 4 Hard Disk 5 Battery Battery Save Mode Battery Display Man...

Page 105: ... internal hard disk drive is installed If you would like to use an external 5 25 inch floppy disk drive attached to the parallel port T4500 or T4500C only the External FDD PRT option must be configured as either FDD A or FDD B If FDD A is selected the computer automatically configures the external FDD as drive A and the internal 3 5 inch FDD as drive B T4500 T4500C SETUP BIOS Version x xx MEMORY C...

Page 106: ...irm that the new values are correct To change any option s go to the next item Manual Reset 3 If the new values are correct press End to record the new values in configuration memory 4 Go to Step 5 of the next item Manual Reset Manual Reset Follow these steps to change any option s manually NOTE The cursor which is bar shaped indicates which option is presently selected 1 Use the arrow keys to mov...

Page 107: ...uter Base This field displays the amount of memory installed and is automatically calculated by the computer You cannot change this value If you set Hard RAM this value changes automat ically Extended Memory This field displays the amount of extended memory the computer has available You cannot change this value Hard RAM This field displays the amount of extended memory assigned to Hard RAM When y...

Page 108: ... Color T4500C T4600C only This option which appears in SETUP and is available through the use of hot keys lets you switch among 180K colors 24K colors and 512K colors on the T4500C or T4600C It does not appear on the T4500 or T4600 Refer to Hot keys under the OTHERS section later in this chapter for more information on hot key operation The LCD display color options are 180K colors Displays color ...

Page 109: ...battery power Full Power Selects a preset set of battery save parameters suitable for Economy Power either Full Power Economy Power or Low Power operation Low Power Selecting this option displays a sub window of the Battery Save Options like the ones shown below The options in the sub window cannot be changed and are for informational purposes only BATTERY SAVE OPTIONS Economy Power Full Power Pro...

Page 110: ...U Sleep Mode This option is used to enable and disable the CPU sleep function Enable Enables sleep mode Disable Disables sleep mode Display Auto Off This option is used to disable or set the duration of the display automatic power off function This function turns off the computer sidelight if you make no entry for the set period of time Always OFF can be used only on the T4500 or T4600 Disable Dis...

Page 111: ...y of the battery by percentage of full charge This is the default setting Time Shows the capacity of the battery by remaining operating time 4 Hard Disk This option enables or disables the hard disk drive xxMB The T4500 Series can use an 80 or 120 MB HDD while the T4600 Series can use a 120 200 or 320 MB HDD The disk s capacity is automatically displayed but cannot be changed except to No drive No...

Page 112: ...wing options COM Port Two COM levels for the card modem can be selected COM1 IRQ4 3F8H or COM2 IRQ3 2F8H If you set this level to the same as that of the serial port the serial port setting automatically changes to Not Used Power This option allows you to turn the expansion cards on or off Howev er this option does not appear if you do not install the card or set the PCMCIA Slot or PC Card Slot 1 ...

Page 113: ...he PRT FDD port to either output only or bi directional For the T4500 Series it is effective only when the External PRT FDD option is set to Printer If either FDD A or FDD B is selected this setting is ignored and the mode is automatically set to bi directional When the T4600 Series is connected to a Desk Station the Printer Port Type setting is independent of the External FDD setting since there ...

Page 114: ...he Enable Enables the CPU cache This is the default setting Disable Disables the CPU cache Speaker Volume This option sets software use of the system speaker Setting this option to off disables the self test alarm All other system alarms are unaffected This option also appears in the Hot Key The default is High Off Disables software use of the system speaker High Enables and sets the level of the ...

Page 115: ...play panel is closed Disable Disables the system automatic power off when the display panel is closed Hotkeys This option enables and disables the hotkeys Enable Enables the hotkeys This is the default setting Disable Disables the hotkeys NOTE The following hotkeys are enabled only in Toshiba MS DOS or Windows 3 x operat ing system environment If the computer is running in a system or environment ...

Page 116: ... RTC Battery 8 Monochrome LCD Display T4500 T4600 9 TFT Color LCD Display T4500C T4600C 10 System PCB 11 Display Mask Before You Begin Look over the procedures in this section before you begin disassembling the T4500 T4600 Family computer Familiarize yourself with the disassembly and reassembly steps Begin each procedure by removing the AC adapter and the battery pack as instructed in Section 4 2 ...

Page 117: ...RU you have fixed or replaced NOTE The illustrations in this chapter are based on the appearance of the T4500C except where otherwise noted Disassembly Procedures The T4500 T4600 Family computer has two basic types of cable connectors Pressure Plate Connectors Normal Pin Connectors To disconnect a Pressure Plate connector pull the pressure plate s side tabs straight out toward the cable and slide ...

Page 118: ...can either damage the threads on the screw or the head of the screw And may prevent proper seating of an FRU After installing an FRU in the computer confirm that the FRU and the computer are functioning properly Tools and Equipment The use of Electrostatic Discharge ESD equipment is very important for your safety and the safety of those around you Proper use of these devices will increase the succ...

Page 119: ...attery latch until it clicks The battery will pop out slightly 4 Firmly grasp the battery pack and pull it out Figure 4 1 Removing the Battery Pack Installing the Battery Pack NOTE The battery pack is designed to fit into the computer in only one way To install the T4500 T4600 Family computer battery pack follow the steps below and refer to Figure 4 1 1 Gently slide the battery pack into the batte...

Page 120: ...al cables connected to it 2 Remove the battery pack as described in Section 4 2 3 Open the cover to the expansion memory slot Figure 4 2 4 Grasp the plastic tab and pull it so the card comes partially out of the computer Figure 4 2 Figure 4 2 Opening the Optional Memory Card Cover 5 Grasp the optional memory card and pull it completely out Figure 4 3 Figure 4 3 Removing the Optional Memory Card CA...

Page 121: ... insert and an arrow pointing toward the connecting edge Turn the memory card so that it is facing up and carefully insert the connecting edge arrow first into the slot Gently push the card until it firmly connects Figure 4 4 Figure 4 4 Installing the Optional Memory Card 2 Close the expansion memory cover Figure 4 2 3 Install the battery pack as described in Section 4 2 NOTE The T4500 T4600 Famil...

Page 122: ...fully disengage the two latches on the sides of the cover to remove it Figure 4 5 4 Open the display Figure 4 5 Removing the Outer Plastic PCMCIA Cover NOTE If a PCMCIA card s is installed go to Step 5 If a card s is not installed go to Step 9 The remaining figures in this section refer specifically to the T4600 C and are slightly different from how the T4500 C will appear which supports only one ...

Page 123: ...computer or assemble the slot follow the steps below and refer to Figures 4 5 through 4 7 1 To access the PCMCIA card slot 1 follow Steps 1 through 7 in the above section on remov ing the optional PCMCIA card 2 To install a PCMCIA card in slot 1 carefully insert the card making sure the card is right side up and the contact surface is inserted first If necessary replace the optional metal retainin...

Page 124: ...d to it 2 Remove the battery pack optional memory card and optional PCMCIA card s as described in sections 4 2 4 3 and 4 4 3 Remove the two M2 5x6 silver screws securing the top cover at the back corners of the computer Figure 4 8 4 Pull open the port cover on the back of the computer and take out the protective plastic bar seated above the ports Figure 4 8 5 Remove the two M2 5x4 silver screws th...

Page 125: ...the function key identifier strip 10 Remove the screw cover and the M2 5x6 silver screw 11 Unsnap the latches securing the top cover to the base assembly Start by pressing on the front of the top cover just in front of the space bar and rotate the keyboard s front edge toward you to release the front latches Figure 4 9 12 Continue around the rim of the top cover until all latches are released then...

Page 126: ... at the front of the battery slot Figure 4 9 4 Turn the computer back over and open the display Lay the display back fully Put a book or small box behind the display to support it 5 Secure the one M2 5x6 silver screw and replace the screw cover below the function key identifier strip Figure 4 9 6 Replace the function key identifier strip 7 Secure the two M2 5x4 silver screws above the PS 2 mouse a...

Page 127: ...ect the AC adapter power cord and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card and top cover as described in Sections 4 2 through 4 5 3 Carefully lift up the keyboard to expose the keyboard connector 4 Disconnect the keyboard cable from pressure plate connector on the system board Figure 4 10 Figure 4 10 Removing the Keyboard ...

Page 128: ... connector on the system board Figure 4 10 2 Seat the keyboard in the computer Note that a fold is built into the keyboard cable Do not try to bend the cable at any other point when you install the keyboard Figure 4 9 Figure 4 11 Seating the Keyboard 3 Install the top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 5 through 4 2 ...

Page 129: ...ct the AC adapter power cord and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover and keyboard as described in Sections 4 2 through 4 6 3 Disconnect the status indicator panel cable from PJ11 on the system board CAUTION The status indicator panel cable is delicate so be extremely careful not to damage it when disconnecting it 4 Lift ...

Page 130: ...r panel cable to PJ11 on the computer and lay the panel into a recession in the protective metal plate CAUTION The status indicator panel cable is delicate so be extremely careful not to damage it when connecting it Figure 4 13 Replacing the Status Indicator Panel 2 Install the keyboard top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 6 through 4 2 Ba...

Page 131: ...rd and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover key board and status indicator panel as described in Sections 4 2 through 4 7 3 Remove the two M2x3 black screws securing the protective metal plate to the FDD two M2 5x6 screws securing the plate to the HDD and the eight M2 5x6 screws and one M2 5x10 screw along the plate s rim...

Page 132: ...ged easily 5 Remove the one M2 5x6 screw securing the ball point mouse connector Figure 4 15 6 Lift out the ball point mouse connector 7 Lift out the speaker 8 Disconnect the FDD flexible cable from PJ4 on the system board Figure 4 15 9 Disconnect the HDD flexible cable from PJ5 on the system board Figure 4 15 Figure 4 15 Removing the HDD ...

Page 133: ...d M2x4 screws securing the bracket to the HDD and slip off the bracket Figure 4 16 Figure 4 16 Removing the HDD Bracket and Speaker Ball point Connector Installing the Hard Disk Drive To install the computer s hard disk drive follow the steps below and refer to Figures 4 14 through 4 17 1 Secure the bracket with the four flat head M2x4 screws Figure 4 16 2 Connect the flexible cable to the HDD Fig...

Page 134: ...nnect the HDD flexible cable to PJ5 on the system board Connect the FDD flexible cable to PJ4 on the system board Figure 4 15 6 Replace the M2 5x6 screw securing the ball point mouse connector Figure 4 15 7 Reseat the protective metal plate making sure the holes for screws match corresponding holes on the computer and the ground cables are routed above the plate Figure 4 14 8 Replace the two M2x3 ...

Page 135: ...ct the FL inverter cable as described in Section 4 8 shown in Figure 4 14 3 Disconnect the two display cables and one FL inverter cable Figure 4 18 4 Remove the tape securing the display disable switch cable and disconnect it from the system board Figure 4 18 5 Remove the four M2 5x6 silver screws behind the status indicator panel securing the ground cables Figure 4 18 6 Remove the four M2 5x6 sil...

Page 136: ...and will not be pinched by the top cover or other components Figures 4 19 and 4 20 3 Connect and route the FL inverter cable and the two display cables to their respective connectors on the system PCB Figure 4 19 Figure 4 19 Routing the Display Cables 4 Reseat the protective metal plate making sure the holes for screws match corresponding holes on the computer and the ground cables are routed abov...

Page 137: ...onnector PJ10 on the system board and secure it in place with tape Figure 4 20 Figure 4 20 Connecting the Display Disable Switch Cable 7 Install the top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 5 through 4 2 ...

Page 138: ...PCMCIA card top cover key board status indicator panel HDD and display assembly as described in sections 4 2 through 4 9 3 Remove two M2 5x6 silver screws from the bottom cover and one M2 5x6 silver screw securing the system PCB Figure 4 21 4 Disconnect the FDD cable at the system PCB Figure 4 21 5 Lift the system PCB out of the computer s case Figure 4 21 Figure 4 21 Removing the System PCB NOTE ...

Page 139: ...the system PCB 3 Install the Display assembly HDD status indicator panel keyboard top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 9 through 4 2 WARNING System PCB units must not be disassembled Protective seals have been placed on the units to discourage users from taking them apart If a seal is removed the word VOID appears on the system PCB under t...

Page 140: ...rd and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover key board status indicator panel and HDD as described in sections 4 2 through 4 8 3 Make sure the FDD cable is disconnected from its pressure plate connector on the system PCB then grasp the FDD on both sides and gently lift up and pull the drive toward the front of the computer...

Page 141: ... s floppy disk drive follow the steps below and refer to Figures 4 23 and 4 24 1 Place the FDD bracket on the FDD and secure it with the two M2x3 black screws Figure 4 24 2 Place the FDD in the computer Figure 4 23 3 Install the display assembly HDD status indicator panel keyboard top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 9 through 4 2 ...

Page 142: ...ional PCMCIA card top cover key board status indicator panel HDD and display assembly as described in sections 4 2 through 4 9 3 Disconnect the backup battery cable and RTC battery cable from their connectors on the system PCB Before removing the batteries note the location of each battery and how their cables are routed Also note the location of the tape securing the backup battery to the protect...

Page 143: ...ery in its rounded cavity on the protective metal plate Figure 4 26 Figure 4 26 Connecting the Backup Battery 2 Connect the RTC battery cable to its connector then fold the cable in a loop so it lies flat against the system board to prevent it from being pinched when you replace the protective metal plate Double sided adhesive tape is applied to the underside of the RTC battery Stick the taped sid...

Page 144: ...ions from the top corners of the display to expose two screws securing the display mask Figure 4 28 4 Remove the two M2 5x4 screws T4500 T4600 or two M2 5x6 screws T4500C T4600C that were covered by the cushions Figure 4 28 5 Carefully insert your fingers between the mask and the LCD panel and pry open the latches Start with the two center latches across the bottom of the display mask Then unlatch...

Page 145: ... of the mask three latches on each side and the bottom two in the center two on the larger support and one on the small support 4 Do a quick check to be sure the mask is seated securely around the display 5 Secure the cover with two M2 5x4 screws T4500 T4600 or two M2 5x6 screws T4500C T4600C at the top corners 6 Attach the two rubber cushions at each top corner to cover the screws 7 Install the t...

Page 146: ...nnected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly and display mask as described in Sections 4 2 4 3 4 4 4 5 4 9 and 4 13 3 Remove the three M2 5x6 screws securing the FL inverter board 4 Carefully rotate the FL inverter board out from right to left and disconnect the FL inverter cable from CN1 and the four FL cables from CN2 CN3 CN4 and CN...

Page 147: ... 2 Secure the FL inverter cable with tape Figure 30 3 Route the cables so they are not pinched by the FL inverter board display hinge or other component Figure 4 28 4 Replace the FL inverter board and secure it with three M2 5x6 screws Figure 4 29 Figure 4 30 Replacing the T4500C FL Inverter Board 5 Install the display mask display assembly top cover optional PCMCIA card optional memory card and b...

Page 148: ...cord and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly display mask and FL inverter board as described in Sections 4 2 4 3 4 4 4 5 4 9 4 13 and 4 14 3 Remove one M2 5x6 screw securing the ground cable to the LCD cover Figure 4 31 4 Remove four M2 5x6 screws securing the TFT color LCD module to the LCD cover Figure...

Page 149: ...ing the T4500C 8 4 inchTFT Color LCD module To install the T4500C s 8 4 inch TFT color LCD display follow the steps below and refer to Figures 4 31 and 4 33 1 Connect the two display cables to CN1 and CN2 on the LCD module and route the cables so they are not pinched by the FL unit or other component Figure 4 33 2 Secure the ground cable with one M2 5x6 screw Figure 4 33 T4500C Display Cable Routi...

Page 150: ...play and then secure it with four M2 5x6 screws Figure 4 31 4 Install the FL inverter board display mask display assembly top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 14 4 13 4 9 4 5 4 4 4 3 4 2 ...

Page 151: ...r cord and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly display mask FL inverter board and TFT color LCD module as described in Sections 4 2 4 3 4 4 4 5 4 9 4 13 4 14 and 4 15 3 Lay the TFT color LCD module face down and use needle nose pliers to unbend the five latches holding the front and back frames together ...

Page 152: ...rn over the panel 7 Use a slender object such as tweezers to push through the four holes on the unit and un snap the latches to free the LCD panel from the back frame Figure 4 36 8 Lift off the back frame and turn over the FL unit so it faces up Figure 4 36 Figure 4 36 Releasing the FL Unit with the LCD Panel from the Back Frame M2x3 silver screws ...

Page 153: ...4 34 through 4 37 1 Place the FL unit on the LCD panel and press down at the corners to snap it into place Figure 4 37 2 Put the FL unit with LCD panel in the back frame and press on the sides to secure the snaps Figure 4 36 3 Secure the four M2x4 screws Figure 4 35 4 Place the assembly in the front frame and carefully bend the five latches back into place Figure 4 34 5 Install the TFT color LCD m...

Page 154: ...e display cover 5 Gently lift the FL inverter board and disconnect the FL inverter cable from CN1 and lift out the FL inverter board Figure 4 38 Removing the T4600C FL Inverter Board Installing the T4600C FL Inverter Board To install the T4600C s FL inverter board follow the steps below and refer to Figure 4 38 1 Connect the FL inverter cable to CN1 and the FL cables to CN2 and CN3 on the FL inver...

Page 155: ...ter disconnect the AC adapter power cord and all external cables connected to it 2 Remove the battery pack top cover and display mask as described in Sections 4 2 4 5 and 4 13 3 Remove the four M2 5x10 screws and two M2 5x6 screws securing the LCD module to the display cover 4 Disconnect the FL cables from CN2 and CN3 and turn over the LCD module Figure 4 39 Removing the T4600C s TFT Color LCD LCD...

Page 156: ... on the TFT color LCD module and rotate the module into place Figure 4 40 2 Connect the two FL cables to CN2 and CN3 on the FL inverter board Figure 4 39 3 Align the 9 5 inch TFT color LCD and secure it with two M2 5x6 screws Then secure the four 2 5x10 screws Figure 4 39 CAUTION If you re replacing the LCD cable or the LCD module DO NOT forget to secure the ground cable near the left side display...

Page 157: ... connected to it 2 Remove the battery pack top cover display mask and TFT color LCD as described in Sections 4 2 4 5 4 13 and 4 18 3 Place the FL unit face down and remove the four M2 5x6 silver screws 4 Lift the FL unit out of the frame Figure 4 41 Removing the T4600C s FL Unit lnstalling the T4600C s FL Unit To install the T4600C s FL unit follow the steps below and refer to Figure 4 41 1 Replac...

Page 158: ... adapter power cord and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly and display mask as described in Sections 4 2 4 3 4 4 4 5 4 9 and 4 13 3 Remove the two M2 5x4 screws securing the FL inverter board 4 Disconnect the FL inverter cable and FL cable from CN1 and CN2 on the FL inverter board Figure 4 42 Removing t...

Page 159: ...so they will not be pinched by the display cover or any other component Figure 4 43 3 Make sure the FL cable is secured with tape as indicated in Figure 4 43 Figure 4 43 Seating the FL Inverter Board and Routing the Cables 4 Insert the grounding tabs in the M2 5x4 screws then secure the FL inverter board to the display cover Figure 4 43 5 Install the display mask display assembly top cover optiona...

Page 160: ...urn off the power to the computer disconnect the AC adapter power cord and all external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly and display mask as described in Sections 4 2 4 3 4 4 4 5 4 9 and 4 13 3 Remove the one M2 5x4 screw securing the ground cable 4 Remove the four M2 5x4 screws from each corner of the LCD module ...

Page 161: ...4 46 6 Disconnect the two display cables from CN1 and CN2 on the LCD module Figure 4 45 Figure 4 45 Removing the LCD Module ...

Page 162: ...e module in the cover and route the cables so they will not be pinched by the dis play panel or other component and secure them with tape Figure 4 46 Figure 4 46 Routing the Display Cables 3 Secure the panel with four M2 5x4 screws Figure 4 44 4 Secure the ground cable with one M2 5x4 screw Figure 4 46 5 Install the display mask display assembly top cover optional PCMCIA card optional memory card ...

Page 163: ...external cables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly display mask FL inverter and LCD module as described in Sections 4 2 4 3 4 4 4 5 4 9 4 13 4 20 and 4 21 3 Peel off the tape from the lamp cover then remove three M1 5x3 brass flat head screws securing the cover and slide the cover to the right to remove it 4 Remove the flu...

Page 164: ...he cover with the corresponding holes in the display assembly cover 2 Secure the plastic cover with the three M1 5x3 brass flat head screws 3 Secure the FL cable to the LCD module with tape as shown in Figure 4 47 4 Install the LCD module FL inverter display mask display assembly top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 21 4 20 4 13 4 9 4 5 4 ...

Page 165: ...ables connected to it 2 Remove the battery pack optional memory card optional PCMCIA card top cover display assembly display mask FL inverter and LCD or TFT module as described in Sections 4 2 4 3 4 4 4 5 4 9 4 13 and 4 14 through 4 16 T4500C or 4 17 and 4 18 T4600C or 4 20 and 4 21 T4500 T4600 3 To remove the gray FL inverter signal cable remove two M2 5x4 screws T4500 T4600 or two M2 5x6 screws ...

Page 166: ...6 screw T4500C T4600C securing the ground cable Figure 4 49 6 Remove the display hinge and lift off the display cable Figure 4 49 Figure 4 49 Removing the Display Cables 7 To remove the display sensor switch remove the one M2x8 silver screw securing the cable to the hinge Figure 4 50 Figure 4 50 Removing the Display Sensor Switch T4500 T4600 M2 5x4screw T4500C T4600C M2 5x6 screw ...

Page 167: ...isplay hinge and secure the hinge with two M2 5x6 screws Figure 4 49 CAUTION Be careful to route the cables so they will not be pinched when you install the display panel Figure 4 51 Figure 4 51 Routing the Display Cables 3 Secure the ground cable with one M2 5x4 brass screw T4500 T4600 or one M2 5x6 screw T4500C T4600C Figure 4 49 4 Install the LCD or TFT module FL inverter display mask display a...

Page 168: ... through 4 8 3 Lift out the butterfly spring round spring winged latch and latch cover Figure 4 52 Removing the Battery Release Latch Installing the Battery Release Latch To install the battery release latch follow the steps below and refer to Figure 4 52 1 Install the winged latch 2 Install the butterfly spring on the spindle making sure one wing of the spring fits into the winged latch and the o...

Page 169: ...4 54 ...

Page 170: ...d ule 1 When installing the display module in the display cover be sure to seat it so that it is properly aligned and maximum visibility of the display is maintained 2 Be careful to align the holes at the four corners of the display module with the correspond ing holes in the display cover before securing the module with screws Do not force the module into place because stress can affect its perfo...

Page 171: ...end a CRT cleaning agent Apply the agent to a cloth and then wipe the panel s surface Do not apply cleaner directly to the panel 4 If water or other liquid is left on the panel s surface for a long period it can change the screen s tint or stain it Be sure to quickly wipe off any liquid 5 Glass is used in the panel so be careful not to drop it or let it strike a hard object which could cause break...

Page 172: ...re to wear a wrist or ankle ground when handling the module 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 the liquid crystals to freeze lose their elasticity or otherwise suffer damage ...

Page 173: ...module Disassembly can cause malfunctions 10 If you transport the module do not use packing material that contains epoxy resin amine or silicon glue alcohol or oxime These materials can release gas that can damage the panel s polarization ...

Page 174: ...B 1 B B I APPENDIX B System PCB Layout B 1 T4500 T4500C System Board Figure B 1 T4500 T4500C System PCB FSH4S1 Front A G D E H B B B B B B F J C K ...

Page 175: ...B 2 B G K N O R P Q C S I D H F T C A M E J Figure B 2 T4500 T4500C System PCB FSH4S1 Back L ...

Page 176: ... ICs and Connectors on the System PCB Back Callout Number Description A IC 2 System Controller Gate Array B IC 11 BIOS ROM C IC 15 IC 36 Clock Generator D IC 25 to IC 27 Serial Interface Driver E IC 30 KeyboardController F IC 32 ICCNT Gate Array G IC 37 to IC 40 Video RAM H IC 46 CRTInterfaceController I IC 49 Speaker Driver J PJ 1 MemoryCardConnector K PJ 2 RTCBatteryConnector L PJ 4 FDD Connecto...

Page 177: ...B 4 B 2 T4600 T4600C System Board Figure B 3 T4600 T4600C System PCB FSH1S1 Front ...

Page 178: ...B 5 Figure B 4 T4600 T4600C System PCB FSH1S1 Back ...

Page 179: ...600 T4600C ICs and Connectors on the System PCB Back Callout Number Description A IC 13 SuperIntegrationT9920 B IC 10 BIOS ROM C IC 44 Clock Generator D IC 21 22 25 Serial Interface Driver E IC 27 KeyboardController F IC 29 ICCNT Gate Array G IC 45 to IC 48 Video RAM H IC 35 CRTInterfaceController I PJ 1 MemoryCardConnector J PJ 2 RTCBatteryConnector K PJ 4 FDD Connector L PJ 5 HDD DCBP SpeakerCon...

Page 180: ...O 16 MA04 111 O 60 MA07 111 O 17 VCC 61 MA09 111 O 18 MA06 111 O 62 GND 19 MA08 111 O 63 GND 20 MA10 111 O 64 GND 21 GND 65 RAS1 001 O 22 RAS0 001 O 66 CAS2 011 O 23 CAS0 011 O 67 GND 24 CAS1 011 O 68 CAS3 011 O 25 VCC 69 RAS3 001 O 26 GND 70 MEMWE 011 O 27 B3V 71 DRAMST1 100 I O 28 DRMST2 100 I O 72 DRAMST3 100 I O 29 DRMST4 100 I O 73 GND 30 DRMST6 100 I O 74 DRAMST5 100 I O 31 CAS0 011 O 75 DRA...

Page 181: ...O 18 MA06 111 O 62 MA11 101 O 19 MA08 111 O 63 GND 20 MA10 101 O 64 GND 21 MA12 101 65 RAS4 001 O 22 RAS3 001 O 66 CAS32 001 O 23 CAS30 001 O 67 GND 24 CAS31 001 O 68 CAS33 001 O 25 VCC 69 RAS4 001 O 26 RAS3 001 70 MEMWEC 001 O 27 B3V 71 DRAMST1 100 I O 28 DRMST2 100 I O 72 DRAMST3 100 I O 29 DRMST4 100 I O 73 GND 30 DRMST6 100 I O 74 DRAMST5 100 I O 31 CAS00 001 O 75 DRAMST7 100 I O 32 CAS01 001 ...

Page 182: ...4 FDD Int Connector Pin Assignments 26 pin Pin Signal I O Pin Signal I O 01 ISSEL 000 I 14 GND 02 GND 15 IDIRC 000 O 03 IRDAT 000 I 16 ILOWD 000 O 04 GND 17 IMON 000 O 05 IWPR 000 I 18 IHMED 000 I 06 GND 19 IRDY 000 I 07 ITRO 000 I 20 VCC 08 GND 21 DSKCHG 000 I 09 IWEN 000 O 22 VCC 10 GND 23 IDSL 000 O 11 IWDAT 000 O 24 VCC 12 GND 25 IINDEX 000 I 13 ISTEP 000 O 26 VCC ...

Page 183: ... 12 SD9 102 I O 37 HDDCS2 000 O 13 GND 38 IIRDY 100 I 14 SD04 102 I O 39 SA02 100 O 15 GND 40 IIO16 000 O T4500 T4500C HDIO16 000 O T4600 T4600C 16 SD10 102 I O 41 IRQ14 100 I 17 GND 42 SA00 100 O 18 SD03 102 I O 43 IOWR 000 O 19 GND 44 HDDCS1 000 O 20 SD11 102 I O 45 VCC 21 GND 46 DRVSL 000 O 22 SD02 102 I O 47 BATR 100 23 GND 48 BATG 100 24 SD12 102 I O 49 SPOUT1 100 25 VCC 50 SPOUT0 100 C 5 PJ6...

Page 184: ... T4500 T4500C PSSTA 000 I T4600 T4600C 04 PSAD1 100 I O 29 VCC 05 CPCNF 100 I 30 PSREQ 000 I 06 PSAD2 100 I O 31 VCC 07 BEEP 000 O 32 BATG 100 08 PSAD3 100 I O 33 VCC 09 PCLR 000 O 34 BATR 100 10 PSAD4 100 I O 35 GND 11 LOBAT 100 I 36 ENB3V 000 O 12 PSAD5 100 I O 37 GND 13 SUBBAT I 38 GND 14 PSAD6 100 I O 39 B3V 15 GND 40 EN3V 000 16 PSAD7 100 I O 41 B3V 17 DSPV O 42 ENVCC 000 18 PSRW0 000 O 43 M1...

Page 185: ... 11 LSEG06 000 O 04 LCOM1 100 O 12 LSEG05 000 O 05 LSEG12 100 O 13 LSEG04 000 O 06 LSEG11 100 O 14 LSEG03 000 O 07 LSEG10 100 O 15 LSEG02 000 O 08 LSEG09 100 O 16 LSEG01 000 O C 10 PJ12 KB I F Connector 19 Pin Table C 11 KB I F Connector Pin Assignments 19 pin Pin Signal I O Pin Signal I O 01 KBOT00 000 O 11 KBOT03 000 O 02 KBRT6 100 I 12 KBOT04 000 O 03 KBRT0 100 I 13 KBOT05 000 O 04 KBRT2 100 I ...

Page 186: ... 102 O 13 GND 04 GND 05 FR 102 O 06 GND 07 UD0 102 O 08 UD1 102 O 09 GND 10 UD2 102 O C 12 PJ17 T4500 T4500C PJ44 T4600 T4600C LCD Connector 15 Pin Table C 13 LCD Connector Pin Assignments 15 pin Pin Signal I O Pin Signal I O 01 CNTRST 100 O 09 GND 02 GND 10 GND 03 UD3 102 O 11 XCLK 102 O 04 GND I 12 LP 102 O 05 PNEL0 100 I 13 GND 06 LD3 102 O 14 LD0 102 O 07 GND 15 FP 102 O 08 LD1 102 O ...

Page 187: ...SEDT 100 I O 25 SD1 000 I 06 PDB03 100 I O 26 BUSY 100 I O 07 MOUSECK 100 I O 27 RD1 000 O 08 PDB07 100 I O 28 SLIN 000 I O 09 EKBDAT 100 I O 29 RI1 100 O 10 PDB02 100 I O 30 PE 100 I O 11 EKBCLK 100 I O 31 RTS1 100 I 12 PDB06 100 I O 32 ERROR 000 I O 13 GND 33 VCC 14 PDB01 100 I O 34 SELECT 100 I O 15 GND 35 VCC 16 PDB05 100 I O 36 CTS1 100 O 17 GND 37 VCC 18 PDB00 100 I O 38 DTR1 100 I 19 GND 39...

Page 188: ...ND 40 SA19 101 I O 11 RVCC 41 SD00 101 I O 12 RGND 42 SD01 101 I O 13 CPCNF 100 I 43 SD02 101 I O 14 MDMSL 001 O 44 SD03 101 I O 15 COMCCK 101 O 45 GND 16 MIRQ 001 I 46 SD04 101 I O 17 SPKTON 001 I 47 SD05 101 I O 18 GND 48 SD06 101 I O 19 SA00 101 I O 49 SD07 101 I O 20 SA01 101 I O 50 SMEW 001 O 21 SA02 101 I O 51 SMER 001 O 22 SA03 101 I O 52 GND 23 SA04 101 I O 53 IOWR 001 I O 24 SA05 101 I O ...

Page 189: ...O 79 GND 124 PDB00 110 I O 80 SD13 101 I O 125 PDB01 110 I O 81 SD14 101 I O 126 PDB02 110 I O 82 IRQ6 101 I 127 PDB03 110 I O 83 SD15 101 I O 128 PDB04 110 I O 84 LA22 101 I O 129 PDB05 110 I O 85 LA23 101 I O 130 PDB06 110 I O 86 DRQ2 101 I 131 PDB07 110 I O 87 LA21 101 I O 132 ACK 000 I O 88 LA19 101 I O 133 BUSY 100 I O 89 LA20 101 I O 134 PE 100 I O 90 DACK6 001 O 135 SELCT 100 I O 91 GND 136...

Page 190: ... 11 RVCC 41 SD00 101 I O 12 RGND 42 SD01 101 I O 13 CPCNF 100 I 43 SD02 101 I O 14 MDMSL 001 O 44 SD03 101 I O 15 COMCCK 101 O 45 GND 16 MIRQ 001 I 46 SD04 101 I O 17 SPKTON 001 I 47 SD05 101 I O 18 GND 48 SD06 101 I O 19 SA00 101 I O 49 SD07 101 I O 20 SA01 101 I O 50 SMEW 001 O 21 SA02 101 I O 51 SMER 001 O 22 SA03 101 I O 52 GND 23 SA04 101 I O 53 IOWR 001 I O 24 SA05 101 I O 54 IORD 001 I O 25...

Page 191: ...D 124 EPDB00 100 I O 80 SD13 101 I O 125 EPDB01 100 I O 81 SD14 101 I O 126 EPDB02 100 I O 82 IRQ6 101 I 127 EPDB03 100 I O 83 SD15 101 I O 128 EPDB04 100 I O 84 LA22 101 I O 129 EPDB05 100 I O 85 LA23 101 I O 130 EPDB06 100 I O 86 DRQ2 101 I 131 EPDB07 100 I O 87 LA21 101 I O 132 EACK 000 I O 88 LA19 101 I O 133 EBUSY 100 I O 89 LA20 101 I O 134 EPE 100 I O 90 DACK6 001 O 135 ESELCT 100 I O 91 GN...

Page 192: ...08 100 O 46 CADA17 100 O 13 CADA13 100 O 47 CADA18 100 O 14 CADA14 100 O 48 CADA19 100 O 15 WEA 000 O 49 CADA20 100 O 16 BSYA 000 I 50 CADA21 100 O 17 MCVCCA 51 MCVCCA 18 MCVP1A 52 MCVP2A 19 CADA16 100 O 53 CADA22 100 O 20 CADA15 100 O 54 CADA23 100 O 21 CADA12 100 O 55 CADA24 100 O 22 CADA07 100 O 56 CADA25 100 O 23 CADA06 100 O 57 N C 24 CADA05 100 O 58 CRSTA 100 O 25 CADA04 100 O 59 WAITA 000 I...

Page 193: ...O 12 CADB08 100 O 46 CADB17 100 O 13 CADB13 100 O 47 CADB18 100 O 14 CADB14 100 O 48 CADB19 100 O 15 WEB 000 O 49 CADB20 100 O 16 BSYB 000 I 50 CADB21 100 O 17 MCVCCB 51 MCVCCB 18 MCVP1B 52 MCVP2B 19 CADB16 100 O 53 CADB22 100 O 20 CADB15 100 O 54 CADB23 100 O 21 CADB12 100 O 55 CADB24 100 O 22 CADB07 100 O 56 CADB25 100 O 23 CADB06 100 O 57 N C 24 CADB05 100 O 58 CRSTB 100 O 25 CADB04 100 O 59 WB...

Page 194: ...ments 6 pin Pin Signal I O Pin Signal I O 01 MOUSDT 101 I O 04 VCC 02 N C 05 MOUSCK 101 I O 03 GND 06 N C C 19 PJ2 FSHBP1 Serial I F Connector 9 Pin Table C 21 Serial I F Connector Pin Assignments 9 pin Pin Signal I O Pin Signal I O 01 DCD1 100 I 06 DSR1 100 I 02 RD1 000 I 07 RTS1 111 O 03 SD1 011 O 08 CTS1 100 I 04 DTR1 111 O 09 RI1 100 I 05 GND C 20 PJ4 FSHBP1 External Keyboard I F Connector 6 P...

Page 195: ...I O 20 GND 08 PDB06 I O 21 GND 09 PDB07 I O 22 GND 10 ACK I 23 GND 11 BUSY I 24 GND 12 PE I 25 GND 13 SELCT O C 22 PJ1 PRT FDD Connector for External FDD 25 Pin T4500 T4500C only Table C 24 PRT FDD Connector Pin Assignments for External FDD 25 pin Pin Signal I O Pin Signal I O 01 RDY I 15 LOWD O 02 INDX I 15 SSEL O 03 TRO I 16 DIRC O 04 WPR I 17 STEP O 05 RDAT I 18 GND 06 DKCH I 19 GND 07 N C 20 G...

Page 196: ...D 1 APPENDIX D ASCII Character Codes Table D 1 ASCII Character Codes ...

Page 197: ..._ 0C 8C 4E F0 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 ...

Page 198: ...3 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 75 1 8...

Page 199: ...odel 6 Refer to Table D 6 scan codes with Ctrl key 7 Refer to Table D 7 scan codes with Alt key Cap No Keytop Code Set 1 Code Set 2 Note Make Break Make Break 112 F1 3B 3B 05 F0 05 113 F2 3C BC 06 F0 06 114 F3 3D BD 04 F0 04 115 F4 3E BE 0C F0 0C 116 F5 3F BF 03 F0 03 117 F6 40 C0 0B F0 0B 118 F7 41 C1 83 F0 83 119 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 ...

Page 200: ... 12 E0 75 E0 F0 75 E0 12 84 E0 AA E0 50 E0 D0 E0 2A E0 F0 12 E0 72 E0 F0 72 E0 12 85 PgUp E0 AA E0 49 E0 C9 E0 2A E0 F0 12 E0 7D E0 F0 7D E0 12 86 PgDn E0 AA E0 51 E0 D1 E0 2A E0 F0 12 E0 7A E0 F0 7A E0 12 89 E0 AA E0 4D E0 CD E0 2A E0 F0 12 E0 74 E0 F0 74 E0 12 Cap No Keytop Code Set 1 Code Set 2 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 E0 53...

Page 201: ... 6C 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 Keytop Shift Code Set 1 Code Set 2 Make Break Make Break Prt Sc Comm...

Page 202: ...500 T4600 keyboard has contrast icons on the left and right arrow keys The color T4500C T4600C does not have a contrast control Also the F6 key has a video mode icon and is used to display normal or reverse video on the monochrome T4500 T4600 computers F 1 United States USA Keyboard Figure F 1 USA Keyboard F 2 United Kingdom UK Keyboard Figure F 2 UK Keyboard ...

Page 203: ...F 2 F 3 German GR Keyboard Figure F 3 German Keyboard F 4 French FR Keyboard Figure F 4 French Keyboard ...

Page 204: ...F 3 F 5 Spanish SP Keyboard Figure F 5 Spanish Keyboard F 6 Italian IT Keyboard Figure F 6 Italian Keyboard ...

Page 205: ...F 4 F 7 Scandinavian SC Keyboard Figure F 7 Scandinavian Keyboard F 8 Swiss German SL Keyboard Figure F 8 Swiss German Keyboard ...

Page 206: ...F 5 F 9 Canadian Specialized Keyboard Figure F 9 Canadian Keyboard F 10 Keycap Number Keyboard Figure F 10 Keycap Number Keyboard ...

Page 207: ...7 SLIN 2 PD0 11 BUSY Figure G 1 Printer Wraparound Connecter G 2 RS 232 C Wraparound Connector 3 TD 2 RD 7 RTS 8 CTS 1 CD 4 DTR 6 DSR 9 RI Figure G 2 RS 232 C Wraparound Connecter G 3 RS 232 C 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 232 C Direct Cable 9 pin to 9 pin ...

Page 208: ...G 2 G 4 RS 232 C 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 232 C Direct Cable 9 pin to 25 pin ...

Page 209: ...ns the Password Deletion Disk will not be distributed to Service Providers You must obtain the current password from the computer s owner to service the machine If the owner forgets the password contact your Toshiba representative for further action UPDATE ...

Page 210: ...ures below to start the BIOS rewrite program 1 Set the system to Boot Mode 2 Turn off the power to the computer 3 Remove any PCMCIA card s and all external cables except AC adapter 4 Turn on the power while holding down the F12 key keep holding down the key until the system speaker sounds a beep 5 When the BIOS update message is displayed insert the BIOS rewrite disk into the FDD Press the Enter k...

Page 211: ...able Unit HDC Hard Disk Controller HDD Hard Disk Drive IRT Initial Reliability Test KBC Keyboard Controller LCD Liquid Crystal Display LED Light Emitting Diode PCB Printed Circuit Board PCMCIA Personal Computer Memory Card International Association PIC Programmable Interrupt Controller PIT Programmable Interrupt Timer PSC Poser Supply Controller ROM Read Only Memory RTC Real Time Clock SIO One Ser...

Page 212: ...agram is for reference only Please see Chapter 4 Replacement Procedures for proper disassembly and reassembly instructions FL inverter Display cover LCD Module Display mask System PCB with Power supply Bottom cover Battery pack Floppy disk drive Hard disk drive Keyboard ...

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