Toshiba Tl000LE User manual

1.1 GENERAL
The Toshiba Tl000LE is one of the lightest portable computers available offering high
technology,highspeed,excellentlegibility,IBM
PC/XTcompatibility,andbatteryoperation.
The
Tl000LE is so small it defines a new class of 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- or 8-Mbyte
memory cards; thus, the system can have up to 9 Mbytes
of RAM.
The TlOooLE system unit consists
of 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 of an AC adapter and batteries
TheLCD supports640x400pixelswithcolor/graphicsadapter(CGA) compatibilityandtwo
color attribute combinations.
Connecting ports for optional equipment are provided on the rear panel of 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
DC IN
RAM r--
80C86-2 power supply
<
1/2/4/8MB
OSC
Standard
500KHz
RAM
I---
DC
1MB
(+5,+12,-9,-22V)
Speaker
OSC
I---
Memory and bus
W
19.09MHz
controller G.A.
~
(SlECP3-GA) KBC
80C49
2.5" HDD
r-1
LCD
I
I/O controller
-
CG-ROM
G .A.
128KB
Backup (SlEI01-GA)
~
RAM
16KB V-RAM
OSC
32KB
17.5MHz
OSC
RTC
PRT/FDD J
32.7KHz
BIOS ROM
SI
-1
3.5"
FDD
48KB
'---
PIT
-1 VFO
t-
FDC OSC
DMAC
24MHz
PIC
UART
-1
COMMS
I
Expansion
OSC
bus connector 14.75MHz
Figure 1-2 Block Diagram
1-4

The system board in the TlOOOLE is composed of the following major components:
• Central processing unit: CPU (80C86-2)
The CPU is a 16-bit microprocessor operating at 9.54MHz
or 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
A)
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
16 Kbytes
48 Kbytes
32 Kbytes
128 Kbytes
Memory and bus controller gate array:
I/O controller gate array: SIECP3-GA (184-pin)
S 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 of the intelligent power supply.
The location of 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 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
Rotation speed
(rpm)
360
360
Data transfer rate
(Kbps)
500
300
Recording method MFM (modified
frequency
modulation)
Recording track density
(bpi)
135
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
21.4
Number of 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
36
33
Access time
(ms)
Track to track
8 5
Average
25 25
Maximum
45 40
Rotation speed
(rpm) 3,109 3,433
Data transfer rate
(bps)
To/from media
10 M 10 M
Interleave
1:1 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) or 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 E.
Figure 1-5 Keyboard
1-9

1.6 SIDELIT LIQUID CRYSTAL
DISPLAY
The sidelit liquid crystal display (LCD) is composed of an LCD module, fluorescent lamp
(FL),
and FL inverter. The sidelit LCD is illuminated from the side. Thus, you can read its
cleardisplay
even in 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
in
Table 1-3.
The sidelit LCD has two color attribute combinations and the display quality can be adjusted
by the contrast and brightness controls.
A high frequency current is supplied by the FL inverter to illuminated the FL.
The sidelit LCD is shown in Figure 1-6.
Figure 1-6 Sidelit
LCD
Table 1-3 Sidelit LCD specifications
Item Specifications
Number of dots
(dots)
640
x 400
Dot dimension
(rnm)
0.27(W)
x 0.27(H)
Dot pitch
(rnm)
0.30(W)
x 0.30(H)
Display area
(rnm)
202.0(W)
x 128.0(H)
Contrast 1 : 4 (Min. )
FL current
(rnA)
7.0
- 7.8
FL frequency (KHz)
25
- 45
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:
1.
Power supply unit
2. System board
3.
FDD
4. HDD
5.
Keyboard
6.
Display
Test program operations are described in Part 3 and detailed replacement procedures are
described in Part
4.
The following items are necessary for implementing the problem isolation procedures:
1. T1000LE Diagnostics Disk
2. Phillips head screwdriver
3. Work disk (for FDD testing)
4. Cleaning disk kit (for FDD testing)
5. Printer port LED
6. 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.
1. Disconnect all optional equipment.
2. Remove any disk in the FDD.

(STjT)
I
'It'
!IInsert the MS-DOS system !
disk into the FDD.
lTurn the POWER switch on.1
I Wait 5
seconds
or more. J
Does the power
indicator No ~erform power supply
corne
on when the power is ~roblem isolation
turned on?
procedure in part
2.3.
Yes
Yes ~erform system board
Does error message problem isolation
displayed?
procedures in part
2 .4.
No
Does the "MEMORY TEST No Perform display
XXXXKB"
message problem isolation
displayed?
procedures
in part
2 . 8 .
Yes
Does the
"MEMORY TEST No
Perform system board
XXXXKB" message proceed
problem isolation
from 16KB to 640KB? procedure
in, part
2.4.
Yes
Is the MS-DOS being
No Perform FDD problem
loaded?
isolation procedure
in part 2.5.
Yes
No
Perform keyboard
Can you type
any
problem isolation
character correctly? procedures
in part
2.7.
Yes
,
1
Figure 2-1 Problem isolation flowchart
2-5

1
Insert the diagnostics
disk into the FDD, then
type A>T1000LE and
press Enter.
Perform the each test. I
Is an error detected in
the diagnostics program?
No
System is normal.
( END)
After confirming
which diagnostic
Yes test detected an
error. Perform the
relevant problem
isolation procedures
as indicated next
page.
Figure 2-1 Problem isolation flowchart (continued)
If the diagnostics programcannotdetect any errors, it may be an intermittent problem. The
running test should be executed several times to isolate the problem.
After confirming which diagnostic test detected an error, perform the relevant problem
isolation procedures as indicated on the following pages.
1. If an error is detected on the system test, memory test, display test, ASYNC test,
printer test,
or real timer test, perform the system board isolation procedures in
Section 2.4.
2. If an erroris detected on the keyboard test, perform the keyboard problem isolation
procedures in Section 2.7.
3.
If an error is detected on the floppy disk test, perform the FDD problem isolation
procedures in Section 2.5.
4.
If an error is detected on the hard disk test, perform the HDD problemisolation
procedures in Section 2.6.
2-6

2.3 POWER SUPPLY PROBLEM
ISOLATION PROCEDURES
This section describes how to determine if the power supply is defective. Start with
PROCEDURE I and continue with the other procedures as instructed. The procedures
described in this section are:
PROCEDURE 1:
Indicator Check
PROCEDURE 2: Connector, Cable, and Power Switch Check
PROCEDURE 3: Replacement Check
2-7

2-8
PROCEDURE 1
Indicator Check
Theindicatorlabeled
"DC IN"lightsred if poweris suppliedfrom the AC adapterwhenyou
connectthe AC adaptertothe Tl000LEanda walloutlet.
If the AC adapter'soutputvoltage
is abnonnal, this indicator blinks red
or does not glow.
(1) If the DC IN indicator blinks red or does not glow before the power is turned on to
the system, see Check
1.
(2) If the DC IN indicator blinks red or does not glow after the poweris turned on to the
system, see Check 2. Also, check the power output circuits to the system.
Check 1
Check 2
Unplug the AC adapter from the wall outlet and system. Reconnect the AC
adapter to the system and wall outlet, then restart the system.
If the problem
still exists, perfonn Check
2.
Checkthe AC adaptervoltage suppliedto the systemusing the multimeter. If
itis notnonnal (DC +12V), the ACadaptermay bedamaged. Replaceit with
anewACadapter.
If theproblemstillexists, perfonnPROCEDURE 2. Also,
check the battery charge circuits.
Theindicator labeled"Battery" lights orange (while the AC adapteris charging the battery)
or lights green (when the battery pack is fully charged) if power is supplied from the AC
adapterwhenyouconnectthe batterypackto the system.
If onlythebatterypackisconnected
to the system, this indicatorlights green (the battery pack is in use)
or lights red (the battery
is low), and
if this indicator blinks red, the battery pack is completely discharged.
(1) If the battery indicator blinks or does not glow when you connect the AC adapter to
the system, see Check
3.
(2) If the battery indicator blinks ordoes not glow when you disconnect the AC adapter
to the system, see Check
6. Also, check the power output circuits to the system.
Check 3
Check 4
Check 5
Check that the battery pack is correctly connected to the system.
If the
problem still exists, perfonn Check 4.
Connect the AC adapter to the system and wait 30 minutes or
so. If the
problem still exists, perfonn Check 5.
Replacethe batterypack with aknown good battery pack.
If the problem still
exists, perfonn PROCEDURE
2. Also, check the battery charge circuits.

Check 6
Check 7
Check that the battery pack is correctly connected to the system.
If the
problem still exists, perfonn Check 7.
Replace the battery pack with a known good one.
If the problem still exists,
perfonn PROCEDURE 2.
2-9

PROCEDURE 2
Connector, Cable,
and Power Switch Check
Thebatterypackisconnecteddirectlyto thepowersupplyboardandan optionalbatterycable
isconnectedtothe systemboardthrough thepowersupply boardonthe back
of thetopcover.
The sub battery and powerswitch cable are connected directly to the system board. Any
of
these cables may be disconnected or damaged. Disassemble the systemunitto checking the
cables. Disassembly procedures are described in Part 4.
Check 1
Check 2
Check 3
2-10
Checkthat the following cables are correctly connected to the system board,
power supply board, and LED board.
LED board PJ601 <--------> System board
PJ602 <--------> PS board
PJ603 <--------> System board
PS board PJ802 <-------- >System board
PJ805 <--------> DC jack
Power switch --------> System board
PJ503
PJ803
PJ505
PJ502
PJ702
PJ501
If any of these cables are disconnected, connectthem andrestart the system.
If the problem still exists, perform Check 2.
Recheck the above cables using the multimeter.
If any of the cables look
damaged, replace them and restart the system.
If the problem still exists,
perform Check
3.
Check the power switch contact using the multimeter. If the power switch
contactis bad,replace thepowerswitchwithanewoneandrestartthe system.
If the problem still exists, perform PROCEDURE 3.

PROCEDURE 3
Replacement Check
In this system unit, the power board, DC-IN board, LED board, and system board are
connectedwith the powersupplycircuits, and the LED board is connectedwith the indicator
circuits. Any
of these boards may be damaged. Perform Checks 1 through 4 to check the
voltages and/or replace them. Replacement procedures are described in Part 4.
Check 1
Check 2
Check 3
Check 4
Replace the DC-IN board with a new one and restart the system.
If the
problem still exists, perform Check
2.
Replacethepowerboardwith anewoneandrestartthe system. If theproblem
still exists, perform Check 3.
ReplacetheLED boardwith anewoneand- restartthe system.
If theproblem
still exists, perform Check 4.
Replace the system board with a new one.
If the problem still exists, other
units may be damaged. Continue troubleshooting the system unit.
2-11

2.4 SYSTEM BOARD PROBLEM
ISOLATION PROCEDURES
This section describes how to detennine if the system board is defective. Start with
PROCEDURE 1 and continue with the other procedures as instructed. The procedures
described in this section are:
PROCEDURE 1: Message and Beep Sound Check
PROCEDURE 2:
Printer Port LED Check
PROCEDURE 3:
Test Program Check
2-12

PROCEDUREl
Message and Beep Sound Check
After the power is turned on, the system performs the initial reliability test (IRT) which is a
program stored in BIOS ROMonthe system board. TheIRTtests and initializes each IC on
the system board.
If an error message appears on the screen, perform Check 1, and if nothing is displayed on
the screen, perform PROCEDURE
2.
Check 1
Check 2
If the following error message appears on the screen, press any key. This
program confirms the current system configuration and the configuration
stored to RTC memory.
If they are different, the following message will
appear. You can easily set the current configuration in the RTC memory by
pressing any key.
If another error message appears, perform Check 2.
***SYSTEM CONFIGURATION ERROR***
A checksum error occurred in the configuration RAM.
Press any key for default set ....
If thefollowing messageappears, pressanykey. Atthistimetheresumeddata
will be erased.
If another error message appears, perform Check 3.
WARNING: RESUME FAILURE.
PRESS ANY KEY TO CONTINUE.
2-13

Check 3
2-14
The IRT program tests the system board. If an error occurs in the IRT
program, the error message appears on the screen and beep sounds are
generated. If the following errormessagesdo notappearandthebeep sounds
are not heard, perform PROCEDURE
3. (The boldface messages shown
below are visible on the screen. The normal messages do not appear on the
screen and only beep sounds are generated.)
V-RAM TEST ERROR BEEP (1 LONG and 2 SHORT)
KEYBOARD ERROR
RESUME ERROR
BEEP (1 SHORT)
If an errorfor storing dataoccurs in the resume mode, the following message
will appear.
WARNING RESUME FAILURE
PRESS
ANY KEY TO CONTINUE
XXXX MEMORY ERROR
DISK CONTROLLER FAILURE
DISK 0 FAILURE
FDD ERROR
HARD RAM TEST BEEP (1 SHORT)
If an error occurs during the read test, the following message will appear.
WARNING: DATA IN HARD RAM WAS LOST
YOU MUST FORMAT HARD RAM BEFORE USE
PRESS
ANY KEY TO CONTINUE