Toshiba T4500, T4500 Series, T4600 Series, T4500C, T4600 User Manual

...

1.1 Features

The Toshiba T4500/T4600 Family is one of the lightest and most advanced portable computers available. Utilizing advanced technology and high-speed components, the T4500/T4600 Family offers excellent display legibility, battery operation and IBM PC/AT compatibility. The T4500/ T4600 Family system unit consists of the following features:

❑ Microprocessor

The T4500 and T4500C uses an i486SX-20 microprocessor that operates at 20 MHz, 3.3 Volts. The T4600 and T4600C uses an i486SL-33 microprocessor that operates at 33 MHz,

3.3 Volts.

❑ Cache memory

The T4500/T4600 Family utilizes an 8 KB cache memory stored in either the i486SX or i486SL microprocessor.

❑ Disk storage

The T4500 and T4500C have an internal 80, 120, or 200 Megabyte (MB) Hard Disk Drive (HDD) with an average access time of 19 milliseconds. The T4600 and T4600C have an internal 120, 200, or 320 MB HDD. A 3.5-inch Floppy Disk Drive (FDD) supports 2HD floppy disks (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 Display (LCD) displays 640 x 480 pixels with a 64-level gray scale. The T4500 and T4600 internal display controller supports Video Graphics Adapter (VGA) functions on the internal display device.

❑ TFT color LCD (T4500C/T4600C)

A high-resolution, Thin Film Transistor (TFT) color Liquid Crystal Display (LCD) displays 640 x 480 pixels with 512 colors for both graphics and characters. The T4500C has an 8.4inch TFT color display, and the T4600C has a 9.5-inch TFT color display. The T4500C and T4600C internal display controller supports Video Graphics Adapter (VGA) functions on the internal display devices.

❑ Keyboard

An easy-to-use 82/84-key enhanced keyboard with full-size keys and standard spacing is compatible with IBM standard software.

1-1

❑ Batteries

The T4500/T4600 Family has three different batteries: a main battery, a backup battery, and a Real Time Clock (RTC) battery.

❑ Expansion port

The T4500/T4600 Family has a unique 150-pin expansion port which attaches to a Desk Station IV or Desk Station IV Plus.

❑ Personal Computer Memory Card International Association (PCMCIA) card slot

The T4500 and T4500C each have one PCMCIA slot, and the T4600 and T4600C each have two PCMCIA slots which enable you to install a Toshiba MiNC card modem or other industry standard PCMCIA card.

❑ Parallel port

The T4500/T4500C’s Centronics-compatible parallel interface port serve two purposes. The port can be used to connect 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 has one 6-pin keyboard port on the back that can be connected to an IBM PS/2 keyboard.

❑ Microsoft Ball Point mouse with Quick Port (BPQP) connection

The T4500/T4600 Family has one BPQP port on the right.

❑ RGB port

The T4500/T4600 Family has one 15-pin RGB port on the back that can be connected to an external video display.

❑ Memory card slot

The T4500/T4600 Family has one Toshiba optional memory card slot which enables you to install an optional Toshiba memory card.

1-2

The T4500/T4600 Family Personal Computer 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

1-3

Figure 1-3 T4600/T4600C System Unit Configuration

1-4

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

1-5

The T4500 and T4500C system board shown in Figure 1-4 is composed of the following major components:

❑ An i486SX-20 CPU ❑ Super Integration (SI) T9901, which stores the following components:

●

Two Direct Memory Access Controllers (DMAC): 82C37

●

Two Programmable Interrupt Controllers (PIC): 82C59

●

One Programmable Interval Timer (PIT): 82C54

●

One Floppy Disk Controller (FDC): TC8565

●

One Serial Input/Output Controller (SIO): TC8570

●

One Variable Frequency Oscillator (VFO): TC8568

●

One I/O Controller

●

One Printer Port Controller

●

One Speaker Controller

❑ A Real Time Clock (RTC)

One T9934 chip is used. The T9934 has 128 bytes of memory. Fourteen bytes of memory 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 keyboard 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 KB (inside CPU) BIOS ROM: 128 KB (96 KB are used)

This Read Only Memory (ROM) contains Initial Reliability Test (IRT),

Basic Input/Output System (BIOS), and video BIOS. Video RAM: 512 KB Optional memory cards expand memory to a maximum of 20 MB.

❑ VGA display controller: WD90C26A (144-pin) (3.3 volt operation)

This controller controls internal and external VGA compatible display. It can display the internal and external display at the same time.

1-6

❑ Clock Generator receives 14.31818 MHz (X1) and generates the following frequencies:

●

20 MHz for the CPU

●

14.7456 MHz for the COM

●

24 MHz for the FDC and VFO

●

16 MHz is used for GA

●

14.31818 MHz for WD90C26A (for VGA)

OSC (X3) generates 32.768 KHz for RTC.

❑ Gate Array

System Controller Gate Array

This gate array has the following functions:

●

Memory Controller

- DRAM Controller

- CPU Controller

- Compatible Bus Interface Controller

●

Bus Controller

- Compatible Bus Interface 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 array has the following 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

1-7

IC Card Controller Gate Array

This gate array has the following functions:

●

IC Card Controller

- PCMCIA IC Card Controller

- Toshiba Modem 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

1-8

The T4600 and T4600C system board shown in Figure 1-5 is composed of the following major components:

❑ An i486SL-33 CPU ❑ One Intel 82360SL

This component is super set with the i486SL microprocessor and stores the following CPU peripheral components:

●

Two DMACs 8237 equivalent

●

Two PICs 8259 equivalent

●

Two PITs 8254 equivalent (T4600 and T4600C uses one PIT.)

●

Two SIOs 16450 equivalent (T4600 and T4600C uses one SIO.)

●

One RTC MC146818AF equivalent

●

One EPP (Enhanced Parallel Port) controller

❑ One super integration (SI) T9920

The components include the following:

●

One FDC TC8565 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 Memory (ROM) contains Initial Reliability Test (IRT),

Basic Input/Output System (BIOS), and video BIOS. Video RAM: 512 KB Optional memory cards expand memory to a maximum of 20 MB.

❑ VGA display controller: WD90C26A (144-pin) (3.3 volt operation)

This controller controls internal and external VGA compatible displays. It can display the internal and external displays at the same time.

1-9

❑ Clock Generator receives 14.31818 MHz (X1) and generates the following frequencies:

●

66.6 MHz for the CPU

●

14.7456 MHz for the COM

●

24 MHz for the FDC and VFO

●

16 MHz is used for GA

●

14.31818 MHz for WD90C26A (for VGA)

OSC (X3) generates 32.768 KHz for RTC (inside of the 82360SL).

❑ A Power Supply Controller (PSC): TMP90PH48 ❑ Gate Array

Sub LCD Controller Gate Array

This gate array has the following 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 Controller

●

EEPROM (for security) Controller

- KBC-Security-EEPROM Communication Controller

●

Others

- KBC Communication Controller

- Disable the HDD/FDD/SIO Access Controller

- Suspend/Resume Controller

1-10

1.3 3.5-inch Floppy Disk Drive

The T4500/T4600 Family 3.5-inch Floppy Disk Drive (FDD) is a thin, high-performance reliable drive that supports 720-KB (formatted) 2DD and 1.44-MB (formatted) 2HD 3.5-inch floppy disks.

The T4500/T4600 Family FDD is shown in Figure 1-6. The specifications for the FDD are described 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 Rotation speed (rpm) 300 300 Recording method Modified Frequency Modulation (MFM)

1-11

1.4 2.5-inch Hard Disk Drive

The Hard Disk Drive (HDD) is a random access non-volatile storage device. It has a non-removable 2.5-inch magnetic disk and mini-winchester type magnetic heads.

T4500 and T4500C supports the 80 MB, 120 MB, and 200 MB. T4600 and T4600C supports the 120 MB, 200 MB, and 320 MB.

The T4500/T4600 Family HDD is shown in Figure 1-7. Specifications for the HDD are described in Table 1-2.

Figure 1-7 2.5-inch HDD

Table 1-2 2.5-inch HDD Specifications

80MB 120 MB 200 MB 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

Maximum 40 25 30 36 25 25 Rotation speed (rpm) 3,486 3,600 3,743 3,200 4,000 4,200 Data transfer rate (bps)

To/from media 12 M 17.6 M 18 M 15.3 M 18.9 to 18.7 to

31.6 M 29.6 M Interleave 1:1 1:1 1:1 1:1 1:1 1:1 Recording method 2-7RLL/ 1-7 RLL 2-7 RLL/ 1-7 RLL 1-7 RLL 1-7 RLL

1-7 RLL 1-7 RLL

1-12

1.5 Keyboard

The 82-(USA) or 84-(European) keyboard is 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

1-13

1.6 Sidelit Liquid Crystal Display (T4500 & T4600)

The sidelit Liquid Crystal Display (LCD) is composed of an LCD module, a Fluorescent Lamp (FL), and an FL inverter board.

1.6.1 LCD Module (T4500 & T4600)

The T4500/T4600 sidelit LCD supports 640 x 480 pixels with a High Resolution Graphics Subsystem (HRGS) and 64 levels of gray. The HRGS includes the functions of the 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 CMOSlevel compatible.

The sidelit LCD is shown in Figure 1-9 and its specifications are described in Table 1-3.

Table 1-3 Sidelit LCD Specifications

Item Specifications

Number of Dots (dots) 640 x 480 Dot pitch (mm) 0.30 (W) x 0.30 (H) Display area (mm) 192 (W) x 144 (H) Contrast 17:1 (typically) FL current (mA) 5.0 FL frequency (KHz) 42

1-14

Figure 1-9 Sidelit LCD

1.6.2 Fluorescent Lamp (FL) Inverter Board (T4500 & T4600)

The FL inverter board supplies the high 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

1-15

1.7 TFT Color LCD Display (T4500C & T4600C)

The TFT Color Liquid Crystal Display (LCD) contains an LCD module, a Fluorescent Lamp (FL), and an FL inverter board.

1.7.1 TFT Color LCD Module (T4500C & T4600C)

The T4500C and T4600C TFT color LCD is backlit and supports 640 x 480 pixels with a High Resolution Graphics Subsystem (HRGS) and 512 colors for graphics and characters. This HRGS includes the functions of Video Graphics Array (VGA).

The T4500C’s LCD receives 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.

1-16

Figure 1-10 TFT Color LCD

Table 1-5 TFT Color LCD Specifications

Item T4500C T4600C

Number of Dots (dots) 640 x 480 640 x 480 Dot pitch (mm) 0.267 (W) x 0.27 (H) 0.3 (W) x 0.3 (H) Display area (mm) 171 (W) x 130 (H) 192 (W) x 144 (H) Contrast 60:1 (minimum) 60:1 (minimum) FL current (mA) 5.0 5.0 FL frequency (KHz) 47 47

1.7.2 Fluorescent Lamp (FL) Inverter Board (T4500C & T4600C)

The FL inverter board supplies high frequency current 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

1-17

1.8 Power Supply Board

The power supply board supplies five kinds of voltages to the T4500/T4600 Family system board. The T4500/T4600 Family power supply board has one microprocessor and it operates at 500 KHz (power off) or 20 MHz (power on).

The power supply board performs the following functions:

1. Determines if the AC adapter or battery is connected to the computer.

2. Detects DC output and circuit malfunctions.

3. Controls the LED indicator and speaker.

4. Controls the Battery capacity icon, Power on icon and AC adapter icon on the status indicator 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 Power Supply Board Output Rating

DC Regulation Maximum

Use for Name voltage tolerance current Ripple

(V) (%) (mA) (mV)

System logic, FDD, HDD VCC +5 ±5 2,600 100 RS-232-C, Flash ROM 12V +12 ±5 120 240 Display DSPV +7.5 to +23 – 7W – RAM, CPU B3V +3.3 ±5 755 66 RS-232-C M12V –7 to –12.6 – 10 –

1-18

1.9 Batteries

The T4500/T4600 Family has three types of batteries:

❑ Main battery pack ❑ Backup battery ❑ Real Time Clock (RTC) battery

Specifications for these batteries are listed in Table 1-8.

Table 1-8 Battery Specifications

Main Battery

Backup battery Nickel Metal Hydride 1.2 V 1,100 mAH RTC battery Lithium-Vanadium 3.0 V 50 mAH

Battery name Material Output voltage Capacity

T4500 Nickel Cadmium 9.6 V 2,400 mAH T4500C, Nickel Metal Hydride 9.6 V 3,000mAH

T4600, T4600C

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 AutoResume, and they maintain the information in Hard RAM.

The main battery is shown in Figure 1-11.

Figure 1-11 Main Battery

1-19

Battery Indicator LED

The Battery Indicator LED is located next to the battery pack slot on the front of the T4500/T4600 Family computer and is identified by a battery icon. The indicator shows the status of the removable battery pack, power supply, and AC adapter.

The status of each can be determined by color:

Orange The battery is being charged. (AC adapter is attached.) Green The battery is fully charged. (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 this state, it will begin charging a few minutes after the AC adapter is connected.

Main Battery’s Overload Protective Circuit

The main battery circuit is shown below:

Figure 1-12 Main Battery Circuit (Nickel Cadmium)

1-20

Figure 1-13 Main Battery Circuit (Nickel Metal Hydride)

The T4500/T4600 Family’s main battery has three devices to prevent circuit overload. Table 1-9 shows the overload specifications.

Table 1-9 Circuit Overload Protection Devices for Main Battery

(Nickel Cadmium/Nickel Metal Hydride)

Protection Method Rating/Function

➊ Thermal protector

Electrical rating 12 VDC, 3 A Maximum circuit breaker current 12 VDC/120 A Allowable operating temperature 60° ~ 75°

➋ Thermal fuse

Current rating 10 A Voltage rating 250 V Temperature rating 91° C

➌ Thermal sensor (Monitors the battery’s temperature)

Load resistance 10 kΩ ±1% (at 25° C) Operating temperature limits -50° ~ 100° C

➊ Thermal protector

When the temperature falls outside the operating range of 60° to 75° C, the thermal protector reduces the current by increasing the internal resistance.

➋ 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 not try to replace a battery fuse or try to bypass a fuse. Using a defective battery can permanently damage the system and can cause injury.

➌ Thermal sensor

The thermal sensor monitors the temperature of the battery.

➍ T line

The thermal sensor monitors the temperature of the battery and changes the voltage in the T line accordingly. The power supply microprocessor monitors the voltage changes in the T

1-21

line.

➎ S line

The power supply microprocessor determines the type of battery by whether the S line is connected to the battery circuit. If the S line is connected to the negative line, the power supply microprocessor determines that a Nickel Metal Hydride Battery is installed in the computer. If the S line is not connected, the power supply microprocessor determines that a Nickel Cadmium Battery is installed in the computer.

1.9.2 Battery Charging Control

Battery charging is controlled by a power supply microprocessor that is mounted on the power supply. The microprocessor controls whether the charge is on or off and detects a full charge when the AC adapter and battery are attached to the computer. The system charges the battery using quick charge or trickle 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 to 4 hours (typical: 2 hours) (power on) Nickel Metal Hydride 1.5 to 5 hours (typical: 3 hours)

NOTES 1: The time required for quick charge 2 is affected by the amount of power the

system is consuming. Use of the fluorescent lamp and frequent disk access diverts power and lengthens the charge time.

2: Using quick charge 1, the system CPU automatically stops the charge after two hours regardless of the condition of the battery.

If one of the following occurs, the battery quick-charge process stops.

1. The battery becomes fully charged

2. The AC adapter or battery is removed.

1-22

3. The battery or output voltage is abnormal.

Data preservation period (full charge) 1 month

Trickle Battery Charge

When the main battery is fully charged and the AC adapter is attached, the microprocessor automatically changes quick charge 1 or 2 to trickle charge.

Detection of full charge

A full charge is detected only when the battery is charging at quick charge. A full charge is detected under any of the following conditions:

1. A battery voltage fall is detected.

2. The charging time exceeds the fixed limit.

3. The thermal rise (+DT) exceeds the fixed limit.

4. The battery’s temperature is over 60°C.

1.9.3 Backup Battery

The backup battery maintains data for AutoResume and Hard RAM. The power source 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 On 20 H

Power Off Doesn’t charge

Data preservation period (full charge) 8.0 H

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 1-12 shows the charging time and data preservation period of the RTC battery.

Table 1-12 RTC Battery Charging/Data Preservation Time

Charging Time Power On 24 H

Time

Power Off 24 H

1-23

1-24

2.1 T4500/T4600 Family Troubleshooting

Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the T4500/T4600 Family is causing the computer to malfunction. The FRUs covered are:

❑ System PCB ❑ Floppy Disk Drive ❑ Hard Disk Drive ❑ Keyboard ❑ Display ❑ Status Indicator Panel

The Diagnostics Disk operations are described in Chapter 3, Tests and Diagnostics and detailed disassembly and 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 troubleshooting

6. A printer port LED

7. An RS-232-C wraparound connector

8. A printer wraparound connector

9. A multimeter

10. An external 5.25-inch floppy disk drive (only T4500 and T4500C)

11. An external CRT

2-1

2.2 Troubleshooting Flowchart

Use the flowchart in Figure 2-1 as a guide for determining which troubleshooting procedures to execute. Before going through the flowchart steps, verify the following:

❑ Ask the user 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 drive is empty.

2-2

Is the

AC adapter icon displayed on the Status Indicator Panel when the AC

adapter is con-

nected?

Perform the Power Supply Troubleshooting procedures in Section 2.3.

Does

the Battery LED

glow?

Turn the power switch on while

pressing the spacebar.

the P** mes-

sage displayed on the SUB

error message displayed?

LCD?

Is an

the

"MEMORY TEST

XXXKB" message

displayed?

Perform the Power Supply Troubleshooting procedures in Section 2.3.

Perform the System PCB Troubleshooting procedures in Section 2.4.

Perform the Display Troubleshooting procedures in Section 2.8.

Does

the "MEMORY

TEST XXXKB" message pro-

ceed from 0KB and

640KB?

If the "Password=" message displays,

type the password, then press

Toshiba MS-DOS

being loaded?

Figure 2-1 Troubleshooting Flowchart (1 of 2)

Enter

Perform the System PCB Troubleshooting procedures in Section 2.4.

Perform the Hard Disk Drive Trouble- shooting procedures in Section 2.6.

2-3

Do typed

characters appear

correctly?

Insert the diagnostics disk into the FDD,

then run the diagnostics test program.

Perform the Keyboard Troubleshooting procedures in Section 2.7.

Did

the diagnostics

test program load

properly?

Perform each test.

an error

detected by any of the

diagnostic tests?

The system is normal.

Figure 2-1 Troubleshooting Flowchart (2 of 2)

Perform the Floppy Disk Drive Troubleshooting procedures in Section 2.5.

After confirming which diagnostic test has detected an error, perform the appropriate procedures as outlined below.

If the diagnostics program cannot detect an error, the problem may be intermittent. The Running Test program should be executed several times to isolate the problem.

Check the Log Utilities function to confirm which diagnostic test detected an error(s), then perform the appropriate troubleshooting 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 PCB Troubleshooting procedures 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 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.

2-4

2.3 Power Supply Troubleshooting

The T4500/T4600 Family’s power supply controls many functions and components. To determine if the power supply is functioning properly, start with Procedure 1 and continue with the other procedures as instructed. The procedures described in this section are:

Procedure 1: Power Status Check on the Status Indicator Panel

Procedure 2: Battery LED Indicator Check

Procedure 3: Battery Power Check

Procedure 4: System PCB Replacement Check

Procedure 1 Power Status Check on the Status Indicator Panel

The Status Indicator Panel displays the status of the following power-related items:

❑ AC adapter or 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 error, the error is displayed on the Status Indicator Panel.

Check 1: Read the error status in the battery power indicator area on the Status Indicator Panel.

Table 2-1 Outline of Power Supply Error Status

Status Source of Error

P0* AC Adapter or Desk Station IV error P1* Battery error P2* VCC Output error P3* B3V Output error P4* 12V Output or M12V Output error P5* Power Supply Microcomputer error P6* Power On error P8* Environment

2-5

❑ Adapter (AC Adapter or Desk Station)

Status Meaning

P01 AC Adapter Voltage is over the maximum allowable limit. P02 Desk Station Voltage is over the maximum allowable limit.

❑ Battery

Status Meaning

P10 Charge current is over the maximum allowable limit.

❑ VCC Output

Status Meaning

P20 VCC Voltage is over the maximum allowable limit. P21 VCC Voltage is below the minimum allowable limit. P22 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 Voltage (12V or M12V)

Status Meaning

P40 12V Voltage is over the maximum allowable limit. P41 12V Voltage is below the minimum allowable limit. P42 M12V Voltage is not within the normal range

2-6

❑ Power Supply Microprocessor

Status Meaning

P50 Firmware error. P52 Program error.

❑ Power Supply On/Off Sequence

Status Meaning

P60 VCC and B3V error.

❑ Environment

Status Meaning

P80 Temperature is over 70°C or under –20°C

Check 2: When P02 is displayed, perform the following steps:

1. Make sure the Desk Station IV is firmly connected to the computer’s expansion bus port. If this port is connected correctly, proceed to step 2:

2. Replace the Desk 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, perform the following steps:

1. Make sure the battery pack is correctly installed in the computer. If the battery pack is correctly installed, proceed to step 2:

2. Replace the battery pack with a new one. If the status still exists, go to Procedure 4.

2-7

Check 5: When P80 is displayed, perform the following steps:

1. Move the computer to an area where the temperature is between 20°C and 70°C. If the status still exists, go to Procedure 4.

Check 6: When P20, P21, P22, P30, P31, P32, P33, P40, P41, P42, P50 or P60 is displayed, go

to Procedure 4.

Procedure 2 Battery LED Check

The Battery LED, identified by a battery icon on the front of the T4500/T4600 Family computer, indicates the battery charging status.

❑ If the Battery LED indicator glows green, the AC adapter is connected and the battery is

fully charged.

❑ If the Battery LED indicator glows amber, the AC adapter 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

socket and wall outlet. If these cables are connected correctly, go to Check 2.

Check 2: Connect a new AC adapter. If the Battery LED indicator still does not glow, go to

Check 3.

Check 3: 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 LED indicator still does not glow, go to

Procedure 4.

2-8

Procedure 3 Battery Power Check

The Status Indicator Panel displays the remaining battery power as shown in Table 2-2.

Table 2-2 Battery Power Status

Battery AC adapter Battery Power (Status Indicator Panel)

Not installed – Does not display Installed Not connected Time or percent (selected in Setup program)

Connected Only percent

If the battery power is not displayed as indicated in Table 2-2, go to Check 1.

Check 1: Make sure the AC adapter’s cable and AC cord are firmly plugged into the DC IN 15V

socket and wall outlet. If these cables are connected correctly, go to Check 2.

Check 2: Connect a new AC adapter. If the Status Indicator Panel does not change, go to Check 3.

Check 3: 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 one unit. Power is transferred to the power supply board through the DC IN 15 V plug located on the power supply board. If either the power supply board or the system board is damaged, replace the System PCB.

Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble the T4500/ T4600 Family computer, and then perform the following check:

Check 1: Replace the System PCB with a new one and restart the system. If the problem still

exists, other FRUs may be damaged.

2-9

2.4 System PCB Troubleshooting

This section describes how to determine if the system board is defective or not functioning properly. Start with Procedure 1 and continue with the other procedures as instructed. The procedures described in this section are:

Procedure 1: Message Check

Procedure 2: Printer Port LED Check

Procedure 3: Diagnostic Test Program Execution Check

Procedure 4: System PCB Replacement Check

Procedure 1 Message Check

When the power is turned on, the system performs the Initial Reliability Test (IRT) installed in the BIOS ROM. The IRT tests each IC on the system board and initializes it.

❑ If an error message is shown on the display, perform Check 1. ❑ If there is no error message, go to Procedure 2. ❑ If the Toshiba 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 configuration in the RTC memory configuration is set to the default setting. If error message (b) appears often when the 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 ......

(d) *** Error in CMOS. Bad memory configuration ***

Check system. Then press [F1] key ......

(e) *** Error in CMOS. Bad time function ***

Check system. Then press [F1] key ......

2-10

Check 2: If the following (a) or (b) error message is displayed on the screen, press any key as

the message instructs.

Error message (a) appears when data stored in RAM under the resume function is lost because the battery has become discharged.

Error message (b) appears when the error is detected during a read test of the Hard RAM or the data in the Hard RAM is lost because the battery has become discharged.

If any other message appears, perform Check 3.

(a) WARNING: RESUME FAILURE.

PRESS ANY KEY TO CONTINUE.

(b) WARNING: DATA IN HARD-RAM WAS LOST.

YOU 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 displayed, go to the Hard Disk Drive Troubleshooting procedures in section 2.6.

If error message (23) or (24) is displayed, go to the Floppy Disk Drive Troubleshooting procedures 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

2-11

(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) HDD #0 ERROR (22) HDD #1 ERROR (23) NO FDD ERROR (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 eightdigit 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 PRT (T4500 and T4500C) or LPT1 (T4600 and T4600C).

2-12

Figure 2-2 Printer Port LED

To use the printer port LED, follow these steps:

1. Turn off the computer’s power.

2. Plug the printer port LED into the T4500 and T4500C’s PRT/FDD connector or T4600 and T4600C’s printer connector.

3. Hold down the space bar and turn on the computer’s power.

4. Read the LED status from left to right as you are facing the back of 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 and halts, the IRT test has already completed the KBC test. In this instance, the IRT indicates an error with the system memory test.

2-13

Table 2-3 Printer Port LED Error Status (1 of 2)

zation

Erro r status Test item Messag e

01H Pre-init for warm start test 05H PIT test

06H PIT initialization

07H PIT function test 0AH Fir st 64KB memory test 0BH System memory initialization 0DH Interrupt vector initialization

15H RTC test

16H CMOS RAM test

18H PIC initialization 1FH Display initialization

22H KBC test

25H System memor y test

30H Extended memory test

40H DMA page r egister test

41H DMAC test

42H DMAC initiali

-TIMER CH.2 OUT ERROR PIT ERROR

READ DATA = XXH WRITE DATA = XXH

-MEMORY REFRESH ERROR FIRST 64KB MEMORY ERROR

-RTC ERROR

READ DATA = XXH WRITE DATA = XXH

****Error in CMOS. Bad battery**** ****Error 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

-CRTC ERROR VRAM ERROR

READ DATA = XXXXXXXXH WRITE DATA = XXXXXXXXH

KBC ERROR SYSTEM MEMORY ERROR ADDRESS = XXXXXXXXH

READ DATA = XXXXXXXXH WRITE DATA = XXXXXXXXH

SYSTEM MEMORY PARITY ERROR ADDRESS = XXXX0000H - XXXXFFFFH

EXTENDED MEMORY ERROR ADDRESS = XXXXXXXXH

READ DATA = XXXXXXXXH WRITE DATA = XXXXXXXXH

EXTENDED MEMORY PARITY ERROR ADDRESS = XXXX0000H - XXXXFFFFH

DMA PAGE REGISTER ERROR READ DATA = XXH WRITE DATA = XXH

DMAC #1 ERROR READ DATA = XXXXH WRITE DA = XXXXH

DMAC #2 ERROR READ DATA = XXXXH WRITE DATA = XXXXH

2-14

Table 2-3 Printer Port LED Error Status (2 of 2)

xpansion system

Erro r status Test item Messag e

4AH PIC test

54H Keyboard test 55H KBC initialization

5AH Mouse initialization

60H HDD initialization

65H FDD initialization

70H Printer test 80H RS-232-C test 90H Timer initialization

A0H NDP initialization A6H Expansion I/O ROM FFH E

RO M

PIC #1 ERROR READ DATA = XXH WRITE DATA = XXH

PIC #2 ERROR READ DATA = XXH WRITE DATA = XXH

KEYBOARD ERROR KBC ERROR

-HDC ERROR

HDC #0 ERROR HDC #1 ERROR

NO FDD ERROR FDD ERROR

-TIMER INTERRUPT ERROR RTC UPDATE ERROR

Check 1: If any of the following error codes are displayed, replace the System PCB with a new

one.

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

Check 2: If Error Code 4Ah is displayed, go to the Keyboard Troubleshooting procedures in

Section 2.7.

Check 3: If Error Code 5Ah is displayed, go to the Hard Disk Drive Troubleshooting 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.

2-15

Procedure 3 Diagnostic Test Program Execution Check

Execute the following tests from the Diagnostic Test Menu. Refer to Chapter 3, Tests and Diagnostics, for more information on how to perform these tests.

1. System test

2. Memory test

3. Printer test

4. ASYNC test

If an error is detected during these tests, replace the System PCB with a new one.

Procedure 4 System PCB Replacement Check

The System PCB may be damaged. 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 restored, another FRU is probably defective. The de-

fective unit must be isolated by performing the T4500 series (T4500/C) Diagnostics Program or the T4600 series (T4600/C) Diagnostics Program on the ASP Diagnostics Diskette.

2-16

2.5 Floppy Disk Drive Troubleshooting

This section describes how to determine if the T4500/T4600 Family’s internal 3.5-inch floppy disk drive is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required.

Procedure 1: FDD Head Cleaning Check

Procedure 2: External 5.25-inch FDD Check (T4500 or T4500C only)

Procedure 3: Diagnostic Test Program Check

Procedure 4: Connector Check and Replacement Check

Procedure 1 FDD Head Cleaning Check

FDD head cleaning is one option available in the diagnostic program. Detailed operation is given in Chapter 3, Tests and Diagnostics.

After loading Toshiba MS-DOS, run the diagnostic program and then clean the FDD heads using the cleaning kit. If the FDD still does not function properly, go 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 (T4500 series) computer.

The floppy disk controller on the computer’s system board controls the internal and external FDD. To determine if either the system board or the internal FDD is defective, check the following items:

Check 1 Connect the external 5.25-inch FDD to the PRT/FDD port and make sure it functions

properly. If it does, perform Procedure 4. If it doesn’t, perform Check 2.

NOTE: To use the external 5.25-inch FDD, set the external FDD/PRT option in the SETUP program to FDD A or FDD B.

Check 2 Replace the System PCB with a new one following the steps in Chapter 4, Replace-

ment Procedures.

2-17

Procedure 3 Diagnostic Test Program Execution Check

The floppy disk drive diagnostic test program is stored on the ASP Diagnostics Diskette. After loading Toshiba MS-DOS, run the diagnostic program. Refer to Chapter 3, Tests and Diagnostics, for more information about the diagnostic test procedures.

Floppy disk drive test error codes and their status names are described in Table 2-3. Make sure the floppy disk in the FDD is formatted correctly 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 FDD not drive 80h Time out error (Not ready)

EEh Write buffer error

FFh Data compare error

Check 1: If the following message is displayed, disable the write protect tab on the floppy disk.

If any other message appears, perform Check 2.

Write protected

2-18

Check 2: Make sure the floppy disk is formatted correctly. If it is, go to Procedure 4.

Procedure 4 Connector Check and Replacement Check

The 3.5-inch Floppy Disk Drive is connected to the System PCB by the FDD cable. This cable may be disconnected from the system board or damaged. Disassemble the computer following the steps

described in Chapter 4, Replacement Procedures and 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, Replacement Procedures. If the FDD is still not functioning properly, perform Check 3.

Check 3: Replace the System PCB with a new one following the steps in Chapter 4, Replace-

ment Procedures.

2-19

2.6 Hard Disk Drive Troubleshooting

To determine if the hard disk drive is functioning properly, perform the procedures below starting with Procedure 1. Continue with the other procedures as instructed.

Procedure 1: Partition Check

Procedure 2: Message Check

Procedure 3: Format Check

Procedure 4: Diagnostic Test Program Execution Check

CAUTION: The contents of the hard disk will be erased when the HDD troubleshooting procedures are executed. Transfer the contents of the hard disk to a floppy disk(s) using the Toshiba MS-DOS BACKUP command. Refer to the Toshiba MS-DOS Manual for more information about how to perform hard disk BACKUP procedures.

Procedure 1 Partition Check

Insert the Toshiba MS-DOS system disk 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 partition on Drive C. Then recheck the system. If the problem still exists, go to Procedure 2.

Check 3: If Drive C is listed as active in the FDISK menu, go to Check 4. If Drive C is not

listed as active, return to the FDISK menu and choose the option to set the active partition for Drive C. Then recheck the system. If the problem still exists, go to Procedure 2.

Check 4: Remove the system disk from the FDD and cold boot the computer. If the problem

still exists, go to Procedure 2. Otherwise, the HDD is operating normally.

2-20

Procedure 2 Message Check

When the computer’s HDD does not function properly, some of the following error messages may appear on the display. Start with Check 1 below and perform the other checks as instructed.

Check 1: If any of the following messages appear, perform Check 2. If the following messages

do not appear, perform Check 4:

HDC ERROR

(After 5 seconds this message will disappear.) or

HDD #0 ERROR

(After 5 seconds this message will disappear.) or

HDD #1 ERROR

(After 5 seconds this message will disappear.)

Check 2: If either of the following messages appears, perform Procedure 3. If the following

messages do not appear, perform Check 3.

Insert system disk in drive

Press any key when ready .....

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 appears, perform Check 4.

System transferred

Check 4: The HDD is connected to the system board through an HDD flexible cable. This cable

can become disconnected or damaged. Disassemble the computer as described in Chapter 4, Replacement Procedures. If the HDD is not connected, connect it to the system board and return to Procedure 1. If the HDD is firmly connected to the system board, perform Procedure 3.

HDD PJ5

2-21

System Board

Procedure 3 Format Check

The computer’s HDD is formatted using the low level format program and the MS-DOS FORMAT program. To format the HDD, start with Check 1 below and perform the other steps as required.

Check 1: Using the Toshiba MS-DOS system disk, partition the hard disk using the FDISK

command. Format the hard disk using FORMAT C:/S/U to transfer the system program to the HDD. If the following message 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 T4500/T4600 Family 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 appears on the display, the HDD low level format is complete. 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 information about the HDD test program.

If an error is detected during the HDD test, an error code and status will be displayed; perform Check 1. The error codes and statuses are described in Table 2-4. If an error code is not generated, the HDD is operating properly.

Table 2-5 Hard Disk Drive Error Code and Status

Code Status Code Status

01h Bad command 20h HDC error 02h Bad address mark 40h Seek error 04h Record not found 80h Time-out error 05h HDC not reset AAh Drive not ready 07h Drive not initialized BBh Undefined error 09h DMA boundary error CCh Write fault 0Ah Bad sector error DDh Total time-out error 0Bh Bad track error E0h Status error

2-22

10h ECC error FFh Data compare error

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.

2-23

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 procedures. 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 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 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 disconnected, firmly connect it. Perform Procedure 1 again. If the keyboard is still not functioning properly, perform Check 2.

2-24

Check 2: The keyboard controller on the system board may be damaged. Replace the System

PCB, which contains the system board, with a new one. Refer to Chapter 4, Replace- ment Procedures for more information about how to replace the System PCB.

2.8 Display Troubleshooting

This section describes how to determine if the T4500/T4600 Family’s display is functioning properly. Start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: Brightness and Contrast Control Check

Procedure 2: External CRT Check

Procedure 3: Diagnostic Test Program Execution Check

Procedure 4: Connector Check

Procedure 5: Replacement Check

Procedure 1 Brightness and Contrast Control Check

Brightness and contrast may be changed 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 active display device. Each time you press Fn + F5, the

active display device changes in the following order: LCD; Dual Display (which activates both the LCD and CRT); and CRT.

If the display is still blank, go to Check 2.

Check 2: Pressing Fn + F1 sets the computer in the instant security mode. Once set in this

mode, the display becomes blank and the keyboard is locked to prevent others from gaining access to your computer. To restore the computer from the instant security mode, enter the instant password or turn the power off and back on.

2-25

Check 3: Pressing the Fn + arrow key increases or decreases the brightness of both the color

and monochrome LCD panel and the contrast on the monochrome LCD panel.

Increases the brightness of the LCD panel.

Decreases the brightness of the LCD panel.

Increases the contrast of the LCD panel. This key is effective only on the T4500/T4600 monochrome LCD.

Decreases the contrast of the LCD panel. This key is effective only on the T4500/T4600 monochrome LCD.

Procedure 2 External CRT Check

Connect the external CRT to the computer’s external monitor port, then press Fn + F5. If the external CRT works correctly, the internal LCD display may be damaged. Go to Procedure 4. If the external CRT appears to have 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

2-26

Program. Refer to Chapter 3, Tests and Diagnostics, for details.

Procedure 4 Connector Check

The Display unit has an LCD module, FL unit (T4500 and T4500C), LED board, Display switch, and FL inverter board. The FL unit (T4500C) and FL inverter board are connected by two cables. The LCD module and system board are connected by two signal cables as shown below. Any of these cables 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.

System

PCB

PJ6/PJ43

PJ11 PJ13 (T4500) PJ44 (T4600)

PJ17/PJ45

PJ10

CN2 CN1

FL Inverter board

Status indicator Panel

LCD Unit

System

PCB

Display switch

Figure 2-3 T4500/T4600 Display Connection

FL Unit

PJ6/PJ43

PJ11

PJ13 (T4500C) PJ44 (T4600C)

PJ17/PJ45

PJ10

CN3 CN2 CN1

Status indicator Panel

Display switch

FL Inverter board

LCD Unit

Figure 2-4 T4500C/T4600C Display Connection

2-27

If any of these cables are not connected, firmly reconnect them and repeat Procedures 1 and 2. If the problem still exists, perform Procedure 5.

Procedure 5 Replacement Check

The FL or FL unit, FL inverter board, LCD module, LED board, and System PCB are connected to the display circuits. Any of these components may be damaged. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble the computer, and then perform the following checks:

❑ If the FL or FL unit does not light, perform Check 1. ❑ If characters are not displayed clearly, perform Check 3. ❑ If some screen functions do not operate properly, perform Check 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 one and test the display again. If the problem

still exists, perform Check 6.

Check 4: Replace the display switch with a new one and test the display again. If the problem

still exists, perform Check 5.

Check 5: Replace the LED board with a new one and test the display again. If the problem still

exists, perform Check 6.

Check 6: Replace the display cable with a new one and test the display again. If the problem

still exists, perform Check 7.

2-28

Check 7: The system board may be damaged. Replace the System PCB with a new one and test

the display again.

2.9 Status Indicator Panel Troubleshooting

To determine if the T4500/T4600 Family’s Status Indicator Panel is functioning properly, perform the following procedures. 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 Status Indicator Panel Test in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics, for more information on how to perform 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 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 to the System PCB.

Status Indicator Panel Cable PJ11 System PCB

If this cable is damaged, replace the status indicator panel with a new one. If the cable is disconnected, firmly connect it. Repeat Procedure 1. If the keyboard is still not functioning properly, perform Check 2.

Check 2: The status indicator panel controller on the system board may be damaged. Replace

the System PCB with a new one. Refer to Chapter 4, Replacement Procedures for more information about how to replace the System PCB.

2-29

3.1 The Diagnostic Test

This chapter explains how to use the T4500/T4600 Family computer’s Diagnostic Test program (TESTCE45 for T4500/T4500C, TESTCE46 for T4600/T4600C) to test the functions of the computer’s hardware modules. The Diagnostics Program is stored on the ASP Diagnostics Diskettes, which are updated with every new product release. We encourage you to copy and distribute this diskette within your organization. The Diagnostic Test consists of 17 programs that are grouped into the Service Program Module (DIAGNOSTIC MENU) and the Test Program Module (DIAGNOSTIC TEST).

The DIAGNOSTIC MENU consists of the following eight functions.

DIAGNOSTIC TEST

❑ ❑ HARD DISK FORMAT ❑ HEAD CLEANING (For FDD) ❑ LOG UTILITIES ❑ RUNNING TEST ❑ FDD UTILITIES ❑ SYSTEM CONFIGURATION ❑ SETUP

The DIAGNOSTIC TEST option contains the following nine functional tests:

SYSTEM TEST

❑ ❑ MEMORY TEST ❑ KEYBOARD TEST ❑ DISPLAY TEST ❑ FLOPPY DISK TEST ❑ PRINTER TEST ❑ ASYNC TEST ❑ HARD DISK TEST ❑ REAL TIMER TEST

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/2DD disk for internal 3.5-inch FDD ❑ 5.25-inch 2D disk for external 5.25-inch FDD (T4500/4500C only) ❑ A cleaning kit to clean the floppy disk drive heads (Head Cleaning) ❑ A printer wraparound connector for the printer wraparound test (Printer test) ❑ An RS-232-C wraparound connector for the RS-232-C port wraparound test (Async test)

The following sections detail the tests within the Diagnostic Test function of the DIAGNOSTIC TEST MENU. Refer to Sections 3.16 through 3.22 for detailed information on the remaining seven Service Program Module functions.

3-1

3.2 Executing the Diagnostic Test

➞

Toshiba MS-DOS is required to run the diagnostics program. To start the diagnostics program, follow these steps:

1. Turn on the computer, and allow the computer to boot. Insert the ASP Diagnostics diskette in the computer’s internal floppy disk drive.

2. At the system prompt, change to drive A and type TESTCE45 for T4500/T4500C or TESTCE46 for T4600/T4600C, and press Enter.

NOTE: You cannot run the diagnostics program on a computer that has loaded an expanded memory manager such as EMM386 or Quarterdeck’s QEMM into memory. If you try to run diagnostics with EMM386 loaded, you will get the following message:

Cannot execute in a virtual 8086 mode.

To run the diagnostics 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.SYS file to its original state.

TOSHIBA personal computer T4xxx DIAGNOSTICS version X.XX (c) copyright TOSHIBA Corp. 19XX

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

➞

Enter : Specify Esc : Exit

: Select items

NOTE: To exit the DIAGNOSTIC TEST MENU, press the Esc key. If a test program is in progress, press Ctrl + Break to exit the test program, or press Ctrl + C to stop the test program.

3-2

3. To display the DIAGNOSTIC TEST MENU from the DIAGNOSTICS MENU, set the

➞

highlight bar to 1, and press Enter. The following DIAGNOSTIC TEST MENU will appear:

TOSHIBA personal computer T4X00 DIAGNOSTICS version X.XX (c) copyright TOSHIBA Corp. 19XX DIAGNOSTIC TEST MENU : 1 - SYSTEM TEST 2 - MEMORY TEST 3 - KEYBOARD TEST 4 - DISPLAY TEST 5 - FLOPPY DISK TEST 6 - PRINTER TEST 7 - ASYNC TEST 8 - HARD DISK TEST 9 - REAL TIMER TEST 10 - NDP TEST (T4600/T4600C only) 11 - EXPANSION TEST (T4600/T4600C only) 88 - FDD & HDD ERROR RETRY COUNT SET 99 - EXIT TO DIAGNOSTICS MENU

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

SUB-TEST : XX PASS COUNT: XXXXX ERROR COUNT : XXXXX WRITE DATA: XX READ DATA : XX ADDRESS : XXXXXX STATUS : XXX

SUB-TEST MENU :

01 - ROM checksum 02 - HW status 99 - Exit to DIAGNOSTIC TEST MENU

➞

: Select items Enter : Specify Esc : Exit

T4X00 DIAGNOSTIC TEST VX.XX

[Ctrl]+[Break] ; test end

[Ctrl]+[C] ; key stop

➞

: Select items Enter : Specify Esc : Exit

NOTE: The menu displayed by your computer may be slightly different from the one shown above.

3-3

5. Select the desired subtest number from the subtest menu and press Enter.

The following message will appear:

TEST LOOP : YES ERROR STOP: YES

Use the arrow keys to move the cursor to the desired options and press Enter.

Selecting YES for the TEST LOOP sets the test to run continuously until it is halted by the user. Selecting NO returns the sub-test menu to the main menu after the test is complete.

Selecting Yes for ERROR STOP stops the test program when an 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 and press Enter. Selecting NO for ERROR STOP keeps the test running even if an error is found.

Table 3-1 in Section 3.3 describes the function of each test on the subtest menu, and Table 3-3 in Section 3.13 describes the error codes and error status for each error.

3-4

3.3 Subtest Names

Table 3-1 lists the subtest names for each test program in the DIAGNOSTIC TEST MENU.

Table 3-1 Subtest Names (1 of 2)

No. Test name Subtest # Subtest item

1 SYSTEM 01 ROM checksum

02 H/W status 03 Version check

2 MEMORY 01 RAM constant data

(T4500/T4500C 02 RAM address pattern data only) 03 RAM refresh

04 Protected mode 05 Memory module 06 Backup memory 07 Hard-RAM 08 Cache memory 09 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 05 320*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 LCD/DAC pallet 11 TFT color display 12 Status indicator panel

3-5

Table 3-1 Subtest Names (2 of 2)

No. Test name Subtest # Subtest item

5 FDD 01 Sequential read

02 Sequential read/write 03 Random address/data 04 Write specified address 05 Read specified address

6 PRINTER 01 Ripple pattern

02 Function 03 Wraparound

7 ASYNC 01 Wraparound (board)

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

02 Backup memory 03 Real time carry

10 NDP 01 Co-processor

(T4600/T4600C only)

3-6

3.4 System Test

To execute the System Test, select 1 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. Move the highlight bar to the subtest you want to execute and press Enter.

Subtest 01 ROM checksum

The ROM checksum tests the system board from address F0000h to FFFFFh

(64KB).

Subtest 02 H/W status

This test reads 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 speed

(T4600/T4600C) 17 MHz 33 MHz

(T4500/T4500C) 10 MHz 20 MHz 5 Media type 2DD 2HD 4 FDD type 1.6 MB 2 MB 3 Reserved — — 2 Drive A/B Ext. = A Ext. = B 1 External FDD ON OFF

3-7

0 Internal FDD 2DD 2HD

Subtest 03 Version check

This subtest checks the version level of the following four items:

❑ BIOS ROM ❑ BOOT ROM ❑ KBC version ❑ PS microprocessor version

This subtest compares the current 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

Reference data

3-8

Current data

3.5 Memory Test

To execute the Memory Test, select 2 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. Move the highlight bar to the subtest you want to execute and press Enter.

Subtest 01 RAM Constant Data (Real Mode)

This subtest writes 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 FFFFh, AAAAh, 5555h, and 0000h.

Subtest 02 RAM Address Pattern Data (Real Mode)

This subtest writes address pattern data created by the exclusive-ORing (XORing), to the address segment and address offset 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 read operations, depending on the size of the data.

Subtest 04 Protected Mode

NOTE: The CONFIG.SYS file must be configured without expanded memory manager programs such as EMM386.EXE, EMM386.SYS or QEMM386.SYS. Also, the HIMEM.SYS must be deleted from the CONFIG.SYS file.

This subtest writes constant data and address data to extended memory (maximum address 100000h) then reads new data and compares the result with the original data.

3-9

The constant data is FFh, AAh, 55h, and 00h.

Subtest 05 Memory Module

NOTE: To execute this subtest, an optional memory card must be installed in the computer.

This subtest functions the same as Subtest 04, except it is used for testing an optional memory card. Memory module capacity is 2 , 4, 8, and 16 MB. After selecting Subtest 05, the following message will appear:

Extended memory size (1:2 MB,2:4 MB,3:8 MB,4:16 MB) ?

Select the number that corresponds to the memory card installed in the computer.

Subtest 06 T4500/T4500C Backup Memory

This subtest writes constant data to memory from address C8000h to CFFFFh, then reads new data and compares the result with the original data. The constant data is 0000h, 5555h, AAAAh, and FFFFh.

T4600/T4600C: (No 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 repeatedly to test area ('7000':'Program' size to '7000':=7FFF' (32 KB)) to check the hit-miss ratio (on/off status). One test takes three seconds.

Number of miss hit < Number of hit ➝ OK

Number of miss hit ¯ Number of hit ➝ Fail

Subtest 09 T4500/T4500C PCMCIA Memory (1 MB SPRAM)

NOTE: To execute this test, a PCMCIA memory card must be installed in the computer.

This subtest divides the PCMCIA window (D0000h to DFFFFh) into 64 KB increments. It then executes the subtest by writing constant data to the PCMCIA memory, reads the data, then compares it with the original data.

3-10

T4600/T4600C: (No test item)

3.6 Keyboard Test

To execute the Keyboard Test, select 3 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Keyboard test contains four subtests that test the computer’s keyboard actions. Move the highlight bar to the subtest 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 display character to blink.

KEYBOARD TEST IN PROGRESS 301000

PrtSc : [Alt] + [SysReq] Pause : [Ctrl]+[Break] to test end

3-11

If test is OK, Press [Del] then [Enter] Key

Subtest 02 Pressed Key Code Display

When a key is pressed, the scan code, character code, and keytop name are displayed on the screen in the format shown below. The Ins, Caps Lock, Num Lock, Scroll Lock, Alt, Ctrl, Left Shift, and Right Shift keys are displayed in reverse screen mode when pressed. The scan codes, character codes, and 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 test does not detect an error, it returns to the subtest menu. If it detects an error, the following message appears:

KBD - MOUSE INTERFACE ERROR

[[ HALT OPERATION ]]

1: Test end

3-12

2: Continue 3: Retry

Subtest 04 DCBP Connection Check

NOTE: To execute the DCBP mouse connection check, a ball-point mouse must be connected 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

3-13

2: Continue 3: Retry

3.7 Display Test

To execute the Display Test, select 4 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Display test contains twelve subtests that test the computer’s display in various modes. Move the highlight bar to the subtest you want to execute and press Enter.

Subtest 01 VRAM Read/Write

This subtest writes constant data FFFFh, AAAAh, 5555h, 0000h and address data to video RAM (256KB). This data is then read from the video RAM and compared to the original data.

Subtest 02 Character Attributes (mode 1, 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.

CHARACTER ATTRIBUTES

NEXT LINE SHOWS NORMAL DISPLAY.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

NEXT LINE SHOWS INTENSIFIED DISPLAY.

IIIIIIIIIIIIIIIIIIIIIIIIIIIIII

NEXT LINE SHOWS REVERSE DISPLAY.

RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR

NEXT LINE SHOWS BLINKING DISPLAY

BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

00 08 ; BLACK 01 09 ; BLUE 04 0C ; RED 05 0D ; MAGENTA 02 0A ; GREEN 03 0B ; CYAN 06 0E ; YELLOW 07 0F ; WHITE

3-14

After pressing Enter, 16 colors or 16 gray scales of mode 13h appear in the 320x200 graphics mode as shown below:

320*200 GRAPHICS DISPLAY [ 13 ]

BLACK BLUE GREEN CYAN RED MAGENTA BROWN WHITE GRAY LIGHT BLUE LIGHT GREEN LIGHT CYAN LIGHT RED LIGHT MAGENTA YELLOW INTENSE WHITE

PRESS [ENTER] KEY

Pressing Enter toggles between the two tests.

To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break.

Subtest 03 Character Set

In this subtest, the character set (addressed 00h to FFh) is displayed in the 40*25 character mode as shown below.

To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break.

3-15

Subtest 04 80x25/30 Character Display (mode 12)

80*XX CHARACTER DISPLAY 012345678901234567890123456789012345678901234567890123456789012345678901234567 !”#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklm !”#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmn “#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmno #$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnop $%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopq %&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqr &’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrs ‘()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst ()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstu )*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuv *+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvw +,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwx ,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxy

-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz ./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{ /0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{| 0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{|} 123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{|}~ 23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{|}~•

3456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{|}~•Ç 456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvwxyz{|}~•Çü

PRESS [ENTER] KEY

Pressing Enter toggles between tests. To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break.

Subtest 05 320x200 Graphics Display (mode 4,D)

This subtest displays two color sets for the color display in 320x200 dot graphics mode 4 and D. One example is shown below:

320*200 GRAPHICS DISPLAY COLOR SET X : [X]

GREEN RED YELLOW CYAN MAGENTA WHITE

PRESS [ENTER] KEY

Pressing Enter toggles between tests. To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break.

3-16

PRESS [Enter] KEY

Subtest 06 640x200 Character Display (mode 6, E)

This subtest displays even dots, odd dots, and all dots in the 640x200 dot graphics

640*400 GRAPHICS DISPLAY : [XX]

mode 6 and E as shown below:

EVEN DOTS ODD DOTS ALL DOTS DRIVEN DRIVEN DRIVEN

PRESS [ENTER] KEY

To exit this subtest and return to 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*XXX GRAPHICS DISPLAY : [XX]

EVEN DOTS ODD DOTS ALL DOTS DRIVEN DRIVEN DRIVEN

PRESS [ENTER] KEY

3-17

Pressing Enter changes the size of the displayed image. To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break.

Subtest 08 Display Page

This subtest confirms that the pages can be changed in order from Pages 0 through 7 in 40*25 character mode.

DISPLAY PAGE 0

0000000000000000000000000000000000000000

0 0

0000000000000000000000000000000000000000

Upon completion of this test, press Ctrl + Break to exit this subtest and return to the DISPLAY TEST menu.

Subtest 09 H Pattern Display/Border Color

This subtest displays 2000 H characters on the entire screen, as shown below.

HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

Pressing Enter displays the following message:

Setting the color CRT (1:yes/2:no)

If an external CRT display is connected to the computer, choose 1 to display the following message:

[Border color test (7 times press [Enter] key]

Press Enter to execute the border color test. To exit this subtest and return to the

3-18

DISPLAY TEST menu, press Ctrl + Break.

Subtest 10 LCD/DAC Pallet

This subtest checks the icon of sub LCD (Arrow, Caps Lock, Scroll Lock and Num Lock) by key operation.

[ Caps/Arrow/Num/Scroll LED test ]

(1) Press [ Caps Lock ] key !...Caps (on/off) (2) Press [ Fn + F10 ] key !...Arrow (on/off) (3) Press [ Fn + F11 ] key !...Num (on/off) (4) Press [ Fn + F12 ] key !...Scroll (on/off)

PRESS [Enter] KEY

After pressing Enter, the subtest writes '2Ah' and '15h' data to 6 bits of 256x3 (RGB). This data is then read and compared to the original data. The following messages will be displayed.

[ DAC 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 display 256 shades of red, green and blue.

Press Enter to change the display. Press Ctrl + Break to exit.

Subtest 12 Status Indicator Panel (Sub LCD)

This subtest turns the status indicator panel icons on and off.

[SUB LCD display]

SUB LCD ALL ON

PRESS [Enter]key

Press Enter to turn the status indicator panel icon on or off. To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break.

3-19

3.8 Floppy Disk Test

CAUTION: Before running the floppy disk test, prepare a formatted work disk. Remove the Diagnostics Diskette and insert the work disk into the FDD. The contents of the floppy

disk will be erased.

To execute the Floppy Disk Test, select 5 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Floppy Disk test contains five subtests that test the computer’s internal floppy disk drive. The following messages will appear after selecting the Floppy Disk Test from the DIAGNOSTIC TEST MENU. Answer each question with an appropriate response to execute the test.

1. Select the test drive number of the floppy disk drive to be tested and press Enter.

Test drive number select (1:FDD#1,2:FDD#2,0:FDD1&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 subtest you want to execute and press Enter. The following message will appear during the floppy disk test.

FLOPPY DISK XXXXXXX

T4X00 DIAGNOSTIC TEST VX.XX [Ctrl]+[Break} ; test end [Ctrl]+[C] ; key stop

SUB-TEST : XX PASS COUNT: XXXXX ERROR COUNT: XXXXX WRITE DATA: XX READ DATA : XX ADDRESS : XXXXXX STATUS : XXX

The first three digits in the ADDRESS number indicate which cylinder is being tested. The fourth digit indicates the head, and the last two digits indicate the sector being tested.

The first digit in the STATUS number indicates the drive being tested and the last two

3-20

digits indicate the error status code as explained in Table 3-3 in Section 3.14.

Subtest 01 Sequential Read

This subtest performs a Cyclic Redundancy Check (CRC), that continuously reads all the tracks on a floppy disk. The following tracks are read according to the media type in the floppy disk drive:

❑ Double-sided, double-density (2D): Tracks 0 to 39.

❑ Double-sided, double-density, double-track (2DD) and double-sided,

high-density, double-track (2HD): Tracks 0 to 79.

The start 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 random data to random addresses on all tracks defined in subtest

01. The data is then read and compared to the original data.

Subtest 04 Write Specified Address

This subtest writes specified data to a specified track, head, and address.

Subtest 05 Read Specified Address

3-21

This subtest reads data from a specified track, head, and address.

3.9 Printer Test

To execute the Printer Test, select 6 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Printer Test contains three subtests that test the output of the printer connected to the computer.

NOTE: An IBM-compatible printer must be connected to the system to execute this test. Make sure the setup option External FDD/PRT is set to Printer.

The following message will appear when the printer test is selected:

channel#1 = XXXXh

channel#2 = XXXXh

channel#3 = XXXXh Select the channel number (1-3) ?

The printer I/O port address is specified by the XXXXh number. The computer supports three printer channels. Select the printer channel number, and press Enter to execute the selected subtest.

Subtest 01 Ripple Pattern

!”#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklm

This subtest prints characters for codes 20h through 7Eh line-by-line while shifting

!”#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmn “#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmno

one character to the left at the beginning of each new line.

#$%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnop $%&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopq %&’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqr &’()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrs ‘()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst ()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstu )*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuv *+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘abcdefghijklmnopqrstuvw

3-22

Subtest 02 Function

This subtest is for IBM-compatible printers, and tests the following functions:

❑ Normal print

❑ Double-width print

❑ Compressed print

❑ Emphasized print

❑ Double-strike print

❑ All characters print

PRINTER TEST

1. THIS LINES SHOWS NORMAL PRINT.

The subtests print the various print types shown below:

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. 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’s printer port. The wiring diagram for the printer wraparound connector (34M741986G01)can be found in Appendix G.

3-23

This subtest checks the output and bidirectional modes of the data control and status lines through the printer wraparound connector.

3.10 Async Test

To execute the Async Test, select 7 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The async test contains six subtests that test the computer's asynchronous communication functions. Move the highlight bar to the subtest you want to execute and press Enter.

Subtests 01 through 04 require the following data format:

Method: Asynchronous Speed: 9600BPS Data: 8 bits and one parity bit (EVEN) Data pattern: 20h to 7Eh

The following message will appear 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 connected to the RS-232-C port. The wiring diagram for the RS-232-C wraparound connector can be fournd in Appendix G.

This subtest checks the data send/receive function through the wraparound connector.

Subtest 02 Board (#1) <=> Board (#2) (T4500/T4500C only)

NOTE: To execute this subtest, an RS-232-C cable (9-pin to 9-pin) must be connected to Boards 1 and 2. The wiring diagram for the RS-232-C direct cable wiring diagram can be found in Appendix G.

3-24

This subtest checks the data send/receive function through the RS-232-C direct cable.

Subtest 03 Point to Point (Send)

NOTE: To execute this subtest, two machines must be connected with an RS-232-C direct cable. One machine should be set as “send” (Subtest 03) and the other set as “receive” (Subtest 04). The wiring diagram for the RS-232-C direct cable can be found in Appendix G.

This subtest sends 20h through 7Eh data to the receive side, then receives the sent data and compares it to the original data.

Subtest 04 Point to Point (Receive)

This subtest, used 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 Slot” to “Others” in

the SETUP program.

This subtest sends data from the RS-232-C port to the built-in modem. The same data is then sent from the modem to the RS-232-C port and compared to the original data.

When you select the channel number of the serial port and press Enter, the following message appears:

Baud rate select (1: 300BPS, 2: 1200BPS, 3: 2400BPS) ?

3-25

Select the baud rate for the serial port and press Enter to execute this subtest.

Subtest 06 Interrupt Test

This subtest checks the Interrupt Request Level of IRQ 4, 3 and 5 from the send side.

3.11 Hard Disk Test

To execute the Hard Disk Test, select 8 from the DIAGNOSTIC TEST MENU. Press Enter, and follow the directions displayed on the screen. The hard disk test contains 10 subtests that test the computer's hard disk drive functions. The following messages appear after selecting the hard disk test from the DIAGNOSTIC TEST MENU. Answer each of the questions with an appropriate response to execute the test:

CAUTION: The contents of the hard disk will be erased when Subtest 02, 03, 04, 05, 06, 08, 09, or 10 is executed. This test should only 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 test from the DIAGNOSTIC TEST MENU, the following message will appear:

Test drive number select (1:HDD#1,2:HDD#2,0:HDD1&2) ?

2. Select the hard disk drive 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 the hard disk controller detects an error. Select 1 or 2 and press Enter. The following message will appear:

Data compare error dump (1:no,2:yes) ?

4. This message is used to select the error dump operation when a data compare error is

3-26

detected. Select 1 or 2 and press Enter. The following message will appear:

Detail status display (1:no,2:yes) ?

5. This message is used to select whether or not the HDD status is displayed on the screen.

The HDD status is described in Section 3.15. Select 1 or 2 and press Enter.

6. The Hard Disk Test message will appear after you respond to the Detail Status prompt.

Select the number of the subtest you want to execute and press Enter. The following message will appear during each subtest.

HARD DISK TEST XXXXXXX

SUB-TEST : XX PASS COUNT : XXXXX ERROR COUNT : XXXXX WRITE DATA : XX READ DATA : XX ADDRESS : XXXXXX STATUS : XXX

The first three digits of the ADDRESS indicate which cylinder is being tested, the fourth digit indicates the head, 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 maximum track and reads the tracks on the HDD sequentially back to Track 0.

Subtest 02 Address Uniqueness

This subtest writes unique address data to each sector of the HDD track-by-track. The data written to each sector is then read and compared with the original data. There are three ways the HDD can be read:

❑ Forward sequential ❑ Reverse sequential ❑ Random

Subtest 03 Random Address/Data

This subtest writes random data to random addresses on the HDD cylinder, head and sector. This data is then read and compared to the original data.

3-27

Subtest 04 Cross Talk & Peak Shift

This subtest writes eight types of worst pattern data (shown below) to a cylinder, then reads the data while moving from cylinder to cylinder.

Worst pattern data: B5ADADh, 4A5252h, EB6DB6h, 149249h, 63B63Bh, 9C49C4h, 2DB6DBh, D24924h.

Subtest 05 Write /Read/Compare (CE)

This subtest writes B5ADADh worst pattern 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 checks the Error Check and Correction (ECC) circuit functions of the specified cylinder and head on the HDD.

Subtest 09 Sequential Write

3-28

This subtest writes specified 2-byte data to all of the cylinders on the HDD.

Subtest 10 W-R-C Specified Address

This subtest writes data to a specified cylinder and head on the HDD, then reads the data and compares it to the original data.

3.12 Real Timer Test

To execute the Real Timer Test, select 9 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The real timer test contains three subtests that test the computer’s real timer functions. Move the highlight bar to the subtest you want to execute 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. 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 the date. To exit, press Ctrl +

Break.

Subtest 02 Backup Memory

This subtest performs the following backup memory check:

❑ Writes 1-bit of “on” data to address 01h through 80h

3-29

❑ Writes 1-bit of “off” data to address FEh through 7Fh ❑ Writes the data pattern AAh through 55h to the RTC 50-byte memory

(address 0Eh to 3Fh)

Then the subtest reads and 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:

3-30

Current date : 12-31-1988 Current time : 23:59:58

PRESS [Enter] KEY TO 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:

3-31

❑ Control word ❑ Status word ❑ Bus ❑ Addition ❑ Multiplication

To exit, press Ctrl + Break.

3.14 Error Code and Error Status Names

Table 3-3 lists the error codes and error status names for the Diagnostic Tests.

Table 3-3 Error Codes and Error Status Names (1 of 2)

Device name Error code Error status name

(COMMON) FF Data Compare Error SYSTEM 01 ROM Checksum 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 06 Media Removed 08 DMA Overrun Error 09 DMA Boundary Error 10 CRC Error 20 FDC Error 40 Seek Error 60 FDD Not Drive Error 80 Time Out Error

3-32

EE Write Buffer Error

PRINTER 01 Time Out

08 Fault 10 Select Line 20 Out Of Paper 40 Power Off 80 Busy Line

Table 3-3 Error Codes and Error Status Names (2 of 2)

Device name Error code Error status name

ASYNC 01 DSR On Time Out

02 CTS On Time Out 04 RX-READY Time Out 08 TX-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 HDC Error 40 Seek Error 80 Time Out Error AA Drive Not Ready BB Undefined Error

3-33

CC Write Fault

E0 Status Error NDP 01 No CO-PROCESSOR (T4600/T4600C 02 Control Word Error only) 03 Status Word Error

04 Bus Error

05 Addition Error

06 Multiplication Error

3.15 Hard Disk Test Detail Status

When an error occurs in the hard disk test, the following message is displayed:

HDC status = XXXXXXXX

Detailed information about the hard disk test error is displayed on the screen by an eight-digit number. The first four digits represent the hard disk controller (HDC) error status number and the last four digits are not used.

The hard disk controller 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” ---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 are not settled over a track.

(Drive seek “1” ---The hard disk drive heads are settled over a track. complete)

3 DRQ “0” ---Drive is not ready for data transfer.

3-34

(Data request) “1” ---Drive is ready for data transfer.

2 CORR “0” ---Other

(Corrected data) “1” ---Correctable data error is corrected.

1 IDX “0” ---Other

(Index) “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

3-35

(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 couldn't find Track 0 during a recalibrate command. 0 —— Not used.

3.16 Hard Disk Format

The hard disk format function performs a low level (physical ) format of the hard disk and executes the following track formats and check:

1. All Track FORMAT

2. Good Track FORMAT

3. Bad Track FORMAT

4. Bad Track CHECK

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 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 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

80 MB 120 MB 200 MB 340 MB

Items (CP2084) (MK1422FCV) (CP2124) (MK2124FC) (MK2224FC) (MK2326FC)

Sector sequences 1 1 1 1 1 1 Cylinders 0~548 0~987 0~761 0~933 0~683 0~968 Heads 0~7 0~9 0~7 0~15 0~15 0~13 Sectors 1~38 1~17 1~39 1~17 1~38 1~49 Sector length (bps) 512 512 512 512 512 512

3-36

T4500/T4500C ... 80, 120, 200 MB T4600/T4600C ... 120, 200, 320 MB

2. Good Track FORMAT This option formats a specified cylinder and track as a good track. If a good track is

formatted as a bad track, use this option to change the track to a good track.

3. Bad Track FORMAT This option formats a specified cylinder and track as a bad track. If a bad track is

detected, use this option to label it as a bad track.

4. Bad Track CHECK This option searches the hard disk for bad tracks by reading data to all the tracks on the

hard disk. A list of bad tracks is displayed when the program is complete. If an error other than a bad track is detected, the program is automatically terminated.

3.16.2 Operations

Select Test 2 (Hard Disk Format) from the DIAGNOSTIC MENU and press Enter. The following messages display:

DIAGNOSTICS - HARD DISK FORMAT : VX.XX

1 - All track FORMAT 2 - Good track FORMAT 3 - Bad track FORMAT 4 - Bad track CHECK 9 - Go to Test MENU

Press [NUMBER] key

1. All Track FORMAT Pressing 1 selects All track FORMAT, which lets you format the entire disk.

3-37

[All track FORMAT]

Drive : #1 = HDD #2 = Non Cylinder : XXXX Head : XX Sector : XX

<<< Model name = >>>

The following selections appear at the bottom of the screen in succession:

Drive number select (1:#1,2:#2) ?

Select a drive number and press Enter. The following message will appear:

Interleave number (1/1 ~ 8) ?

Select an interleave number, 1 ~ 8 and press Enter. Pressing only Enter selects 1.

Unlock format select (1:no/2:yes)

Select whether the disk has an unlock format.

NOTE: This option appears only when an HDD manufactured by JVC is installed. For JVC HDDs, which are the only disks 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 same as executing all track format described below.

[ WARNING : Current DISK data will be

completely destroyed ]

Press Bad cylinder number (dddd)] key ? Press Bad head number (dd)] key ?

Enter the cylinder and head number in the format above in decimal notation. Repeat for each bad track you want to format.

After entering the bad tracks, press Enter to execute the format.

3-38

All Track Format

All tracks are formatted as good tracks except those registered as bad tracks (described above) or those identified as bad tracks in track verification described below.

Track Verification

A check is made of all tracks and if an ECC error, ECC-correctable-data error or recordnot-found error is detected at a track, that track is formatted as a bad track automatically.

2. Good Track FORMAT

If a good track has been erroneously formatted as a bad track, you can use this subtest to reformat the track as a good track. To format a track as a good track, enter the number for the drive, interleave, cylinder 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) ? 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 list of bad tracks. The test is terminated 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 tracks will be displayed in the format shown below.

3-39

[[cylinder, head = 0123 03]]

Press Enter to return to the Hard Disk Format menu.

CAUTION: After the HDD has been formatted, execute the Toshiba MS-DOS FDISK command, to partition the HDD. Next, execute the Toshiba MS-DOS FORMAT command. Refer to the Toshiba MS-DOS manual for 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 operations. 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 CLEANING : VX.XX

Mount cleaning disk(s) on drive(s).

Press any key when ready.

3-40

2. Remove the Diagnostics Disk from the FDD, then insert the cleaning disk and press

Enter.

3. When the cleaning start message appears, the FDD head cleaning has begun.

4. The display automatically returns to the DIAGNOSTIC MENU when the program is completed.

3.18 Log Utilities

3.18.1 Function Description

This function logs error information generated while a test is in progress and stores the results in RAM. This function can store data on a floppy disk or output the data to a printer. If the 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 DIAGNOSTIC MENU logs error information into

RAM or onto a floppy disk. The 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 PROTECTED 00 FDD 01 0000 180 00001 00 00 FDD - TIME OUT ERROR

3-41

Address

Error status

Pass count HDC status

Subtest number Read data Test name Write data 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.

3-42

❑ The 3 key returns to the Diagnostic Menu. ❑ The 4 key erases all error log information in RAM. ❑ The 5 key outputs the error log information to a printer. ❑ The 6 key reads the log information from a floppy disk. ❑ The 7 key writes the 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. However, it is not added to the error count.

3.19 Running Test

NOTE: The running test executes key diagnostic tests covering the complete system. It can be used to verify reported, undetected, or intermittent problems. We recommend that the running test be allowed to run several passes during the initial diagnosis. We also recommend 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 05)

6. Real timer test (Subtest 02)

7. Printer test (Subtest 03)

8. Async test (Subtest 01)

The system automatically detects the number of floppy disk drives connected to the computer for the FDD test.

3.19.2 Operations

CAUTION: Do not forget to load a work disk in the FDD. If a work disk is not loaded, an error will be generated during the FDD testing.

1. Remove the diagnostics disk from the floppy disk drive and insert the work disk.

3-43

2. Select 6 from the Diagnostic Menu and press Enter, the following message will be displayed:

Printer wraparound test (Y/N) ?

Selecting Y (yes) executes the printer wraparound test. A 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

3-44

execute this test.

4. Select Y or N and press Enter. The following message will be appear :

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.

3.20 Floppy Disk Drive Utilities

3.20.1 Function Description

This function formats the FDD, copies the floppy disk and displays the dump list for both the FDD and HDD. Note that the T4600/T4600C does not support an external FDD. Therefore, all references to an external FDD (3.5-inch or 5.25-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, double-track, 96/135 TPI, MFM mode, 512 bytes, 9 sectors/track.

●

2HD: Double-sided, high-density, double-track, 96/135 TPI, MFM mode, 512 bytes, 18 sectors/track.

❑ COPY

This program copies data from a source floppy disk to a target floppy disk.

❑ DUMP

This program displays the contents of the floppy disk (both 3.5-inch and 5.25-inch) and the designated sectors of the hard disk on the display.

3-45

3.20.2 Operations

Selecting 7 from the DIAGNOSTIC MENU and pressing Enter, displays the following message:

[ FDD UTILITIES ]

1 - FORMAT 2 - COPY 3 - DUMP 9 - EXIT TO DIAGNOSTICS MENU

❑ FORMAT Program

1. Selecting FORMAT displays the following message:

DIAGNOSTICS - FLOPPY DISK FORMAT : VX.XX

Drive number select (1:A, 2:B) ?

2. Select a drive number to display the following message:

Type select (0:2DD-2D,1:2D1-2D,2:2D-2HD,3:2HD-2HD) ?

3. Select a media/drive 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, head = XXX X]]

After the floppy disk is formatted, the following message will appear:

Format complete

Another format (1:Yes/2:No) ?

5. Selecting 1, displays the message from Step 3 above. Selecting 2 returns the test

program to the DIAGNOSTIC MENU.

3-46

❑ COPY Program

1. When COPY is selected, the following message appears:

FLOPPY DISK FORMAT & COPY : VX.XX Type select (0:2DD-2DD,1:2D-2D,2:2D-2HD,3:2HD-2HD) ?

2. Selecting a media/drive type number will display a message similar to the one below:

Insert source disk into drive A: Press any key when ready.

3. Remove the Diagnostics Disk from the FDD, insert the source disk and press any key.

The following message will appear, indicating the program has started.

[ FDD TYPE ] : TRACK = XXX [ FDD TYPE ] : HEAD = X [ FDD TYPE ] : SECTOR = XX

Copy start

[[ track,head = XXX X ]]

4. Remove 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, select 1 and the message from Step 1 will be displayed again.

Entering 2 returns the test program to the DIAGNOSTIC MENU.

❑ DUMP Program

1. When DUMP is selected, the following message appears:

DIAGNOSTICS-HARD DISK & FLOPPY DISK DUMP : VX.XX Drive type select (1:FDD, 2:HDD) ?

2. Select a format type number. If 2 is selected, the display will go to the step (5).

3-47

Toshiba T4500, T4500 Series, T4600 Series, T4500C, T4600 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual