Toshiba Tl000LE Manual de usuario

1.1 GENERAL

The Toshiba

Tl000LE

is one

the lightest portable computers available offering high

technology,highspeed,excellentlegibility,IBM

PC/XTcompatibility,andbatteryoperation.

The

Tl000LE

is so small it defines a new class

portables called notebook computers.

The

Tl000LE

uses the MS-DOS version 3.30 operating system and contains a powerful

80C86-2 microprocessorwith a 16-bitdata width on the data bus line. The standardrandom

access memory (RAM) capacity is I-Mbyte with the ability to insert

1-,2-,4-

8-Mbyte

memory cards; thus, the system can have up to 9 Mbytes

RAM.

The TlOooLE system unit consists

the following features:

• System board/memory board

• 3.5-inch floppy disk drive (FDD) that supports two memory formats:

1.44-Mbyte double-sided, high-density, double-track (2HD)

720-Kbyte double-sided, double-density, double-track (2DD)

• 2.5-inch hard disk drive (HDD) with 20-Mbyte capacity

• IBM enhanced keyboard compatibility

• Sidelit liquid crystal display (LCD)

• Power supply system consisting

an AC adapter and batteries

TheLCD supports640x400pixelswithcolor/graphicsadapter(CGA) compatibilityandtwo

color attribute combinations.

Connecting ports for optional equipment are provided on the rear panel

the system. A

parallel port, serial port, and expansion bus connector are all provided for.

Figure

1-1

TlOOOLE

system unit

1-3

1.2 SYSTEM UNIT

Figure 1-2 shows the T1000LE's system block diagram.

Optional

CPU

Intelligent

RAM

r--

80C86-2

power

supply

1/2/4/8MB

OSC

Standard

500KHz

RAM

I---

1MB

(+5,+12,-9,-22V)

Speaker

OSC

I---

Memory

and

bus

19.09MHz

controller

G.A.

(SlECP3-GA)

KBC

80C49

2.5"

HDD

r-1

LCD

I/O

controller

CG-ROM

.A.

128KB

Backup

(SlEI01-GA)

RAM

16KB

V-RAM

OSC

32KB

17.5MHz

OSC

RTC

PRT/FDD J

32.7KHz

BIOS

ROM

-1

3.5"

FDD

48KB

'---

PIT

-1

VFO

FDC

OSC

DMAC

24MHz

PIC

UART

-1

COMMS

Expansion

OSC

bus

connector

14.75MHz

Figure 1-2 Block Diagram

1-4

The system board in the

TlOOOLE

is composed

the following major components:

• Central processing unit: CPU (80C86-2)

The CPU is a 16-bit microprocessor operating at 9.54MHz

4.77MHz clock speed.

• Super integration: SI (T9776)

The SI stores the following components:

Direct Memory Access controller:

Programmable interrupt controller:

Programmable interval timer:

Floppy disk controller:

Universal asynchronousreceiver

and transmitter:

• Variable frequency oscillator: VFO (TC8568)

The VFO chip is used for FDD control logic.

• Real time clock: RTC (TC8521)

DMAC (TMP82C37

PIC (TMP82C59A)

PIT (TMP82C53)

FDC (TC8565)

SIO (TC8570)

The RTC has memory in the chip which keeps the date, time,

and system configuration with an RTC battery.

• Keyboard controller: KBC (TMP80C49)

• Memories:

Standard RAM:

Backup RAM:

BIOS ROM:

Video RAM:

CGROM:

• Gate arrays:

I Mbyte

Kbytes

48 Kbytes

32 Kbytes

128 Kbytes

Memory and bus controller gate array:

I/O controller gate array: SIECP3-GA (184-pin)

lEIOI-GA

(184-pin)

1-5

1-6

• Oscillators: OSC

32.768KHz OSC

(Xl)

is used for the RTC.

19.0909lMHz

OSC (X2) is used for the CPU.

l4.7456MHz OSC (X3) is used for the SIO.

24MHz OSC (X4) is used for the VFO.

l7.5MHz

OSC (X5) is used for the LCD.

500KHz OSC

(X50l)

is used for the CPU

the intelligent power supply.

The

location

these OSCs are shown in Appendix A.

1.3 3.5-INCH FLOPPY DISK

DRIVE

The 3.5-inch floppy disk drive (FDD) is a high perionnance, reliable, and thin drive that

supports 720-Kbyte (fonnatted) 2DD and 1.44-Mbyte(fonnatted) 3.5-inchfloppy diskettes.

The FDD is shown in Figure 1-3 and its specifications are described in Table 1-1.

Figure 1-3 3.5-inch FDD

Table

1-1

3.5-inch FDD specifications

Item

Specifications

2-Mbyte

mode

1-Mbyte

mode

Storage

capacity

(Kbyte)

Unformatted

2,000

1,000

Formatted

1,440

720

Number

heads

2 2

Number

cylinders

80 80

Access

time

(ms)

Track

track

3 3

Average

181

Head

settling

time

15 15

Rotation

speed

(rpm)

360

Data

transfer

rate

(Kbps)

500

300

Recording

method

MFM

(modified

frequency

modulation)

Recording

track

density

(bpi)

135

Recording

density

(bpi)

17,430

8720

1-7

1.4 2.S-INCH HARD DISK

DRIVE

The 20-Mbyte (formatted) hard disk drive (HDD) is a random access storage device. It is

equipped with a non-removal 2.5-inch magnetic disk and mini-Winchester type magnetic

heads.

The HDD is shown in Figure 1-4 and its specifications are described in Table 1-2.

Figure 1-4 2.5-inch HDD

Table 1-2 2.5-inch HDD specifications

Item

JDE2825P

CP2024

Storage

capacity

(Mbytes)

Formatted

21.4

Number

disks

1 1

Data

surfaces

2 2

Data

heads

2 2

Track

per

surface

581

653

Track

density

(tpi)

1,465

1,700

Sectors

per

track

Access

time

(ms)

Track

track

8 5

Average

25 25

Maximum

Rotation

speed

(rpm)

3,109

3,433

Data

transfer

rate

(bps)

To/from

media

Interleave

1:1

Recording

method

2-7

RLL

code

(Run

length

limited)

Recording

density

(ID) I

(bpi)

39,665

34,816

1-8

1.5 KEYBOARD

The 82- (USA)

84- (European) keyboard is mounted on the systemunit. The keyboard is

connected to the keyboard controller on the system board through a 20-pin flat cable. The

keyboard is shown in Figure 1-5.

Optional keyboard configurations are illustrated in Appendix

Figure 1-5 Keyboard

1-9

1.6 SIDELIT LIQUID CRYSTAL

DISPLAY

The

sidelit liquid crystal display (LCD) is

composed

LCD

module, fluorescent lamp

(FL),

and

inverter.

The

sidelit

LCD

is illuminated

from

the side. Thus, you

can

read

its

cleardisplay

even

poorly litconditions. Itreceives vertical

and

horizontal synchronizing

signals, 8-bit

data

signals (4-bit upperdata signal, 4-bit

lower

data

signal), and shiftclock

for

data

transmission. All signals are TTL-level compatible.

The

specifications are described

Table

1-3.

The

sidelit

LCD

has

two

color

attribute combinations

and

the display quality

can

be adjusted

the contrast

and

brightness controls.

A high frequency

current

is supplied

the

inverter to illuminated the FL.

The

sidelit

LCD

shown

in Figure 1-6.

Figure 1-6 Sidelit

LCD

Table

1-3 Sidelit

LCD

specifications

Item

Specifications

Number

dots

(dots)

640

400

Dot

dimension

(rnm)

0.27(W)

0.27(H)

Dot

pitch

(rnm)

0.30(W)

0.30(H)

Display

area

(rnm)

202.0(W)

128.0(H)

Contrast

1 : 4

(Min.

)

current

(rnA)

7.0

7.8

frequency

(KHz)

1-10

2.1

GENERAL

The problem isolation procedures described in Part 2 are used to isolate defective field

replaceable units (FRUs). The FRUs covered are:

Power supply unit

2. System board

FDD

HDD

Keyboard

Display

Test program operations are described in Part 3 and detailed replacement procedures are

described in Part

The following items are necessary for implementing the problem isolation procedures:

T1000LE Diagnostics Disk

2. Phillips head screwdriver

Work disk (for FDD testing)

4. Cleaning disk kit (for FDD testing)

5. Printer port LED

RS-232-C, printer wraparound connectors

7. Multimeter

The problem isolation flowchart described in Section 2.2 can be used to determine which

isolation procedures are necessary to isolate a

TlOOOLE

problem.

2-3

2-4

2.2 PROBLEM ISOLATION

FLOWCHART

TheflowchartinFigure2-1 isusedasaguidefor determiningwhichFRUisdefective. Please

confIrm the following before performing the flowchart procedures.

Disconnect all optional equipment.

Remove any disk in the FDD.

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