Toshiba T3300SL Maintenance Manual

Chapter 1 Hardware Overview

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Contents

1.1 T3300SL Features .............................................................................................................1-5

1.2 The System Unit Block Diagram ....................................................................................... 1-8

1.3 3.5-inch Floppy Disk Drive............................................................................................. 1-11

1.4 2.5-inch Hard Disk Drive ................................................................................................ 1-12

1.5 Keyboard ........................................................................................................................ 1-13

1.6 Sidelit Liquid Crystal Display ......................................................................................... 1-14

1.6.1 LCD Module........................................................................................................ 1-14

1.6.2 FL Inverter Board................................................................................................ 1-15

1.7 Power Supply Board........................................................................................................ 1-16

Tables

Table 1-1 3.5-inch FDD specifications ................................................................................... 1-11

Table 1-2 2.5-inch HDD specifications ..................................................................................1-12

Table 1-3 Sidelit LCD specifications ..................................................................................... 1-14

Table 1-4 FL inverter board specifications............................................................................. 1-15

Table 1-5 Power supply board output rating........................................................................... 1-16

Figures

Figure 1-1 T3300SL personal computer ..................................................................................... 1-7

Figure 1-2 System unit configuration ........................................................................................1-7

Figure 1-3 Block diagram .......................................................................................................... 1-8

Figure 1-4 3.5-inch FDD.......................................................................................................... 1-11

Figure 1-5 2.5-inch HDD ......................................................................................................... 1-12

Figure 1-6 Keyboard................................................................................................................ 1-13

Figure 1-7 Sidelit LCD ............................................................................................................ 1-14

Figure 1-8 Power supply board ................................................................................................ 1-16

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1.1 T3300SL Features

The Toshiba T3300SL is one of the lightest and most advanced portable computers available. Utilizing advanced technology and high speed components, the T3300SL offers excellent display legibility, battery operation, and IBM PC/AT compatibility.

The T3300SL system unit consists of the following features:

❑ An 80386SL-25 32-bit microprocessor, operating at 25MHz, 12.5MHz or 6.25MHz. ❑ Standard Random Access Memory (RAM) capacity is 2MB. Optional 2, 4, 6 or 16MB

expansion cards can be installed, thus expanding RAM memory to a maximum of 18MB.

❑ An optional 80387SX-25 Numeric Data Processor (NDP) can be installed in the built-in

socket located on the bottom of the T3300SL.

❑ A high resolution, fully adjustable Liquid Crystal Display (LCD) is composed of 640

horizontal and 480 vertical pixels and displays 25 lines of standard text 80 characters wide. The LCD displays 32 levels of gray (at a resolution of 320 x 200) and supports the High Resolution Graphics Subsystem (HRGS), including VGA functions.

❑ The 3.5-inch internal Floppy Disk Drive (FDD) supports both 1.44MB Double-sided, High-

density, Double-track (2HD) and 720KB Double-sided, Double-density, Double-track (2DD) floppy disk.

❑ The integrated 2.5-inch 80 or 120MB Hard Disk Drive (HDD) provides nonvolatile storage

for software and data.

❑ An 82/84-key keyboard has full-sized keys, a numeric keypad overlay, cursor, and page

control. The keyboard supports software that uses the industry standard 101/102-key keyboard.

❑ The universal auto-sensing AC adapter supplies power to operate the T3300SL and recharge

its batteries. It can operate from a range of 100 to 240 volts. Optional power cords support various countries’ AC outlet configurations.

❑ A PS/2 mouse connector is located on the right side of the T3300SL. ❑ A Personal Computer Memory Card International Association (PCMCIA) standard release

2.0 slot allows you to install a Toshiba card modem or an industry standard card in the T3300SL.

❑ Serial devices can be connected to the T3300SL’s standard 9-pin RS-232-C serial port.

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❑ One selectable Centronics-compatible parallel port allows the T3300SL to interface with

optional parallel devices.

❑ The Toshiba AutoResume feature stores the T3300SL’s data in backup RAM when the

power is turned off.

❑ The Real Time Clock (RTC) IC chip and battery continuously update the date and time and

keep the system configuration even when the T3300SL power is off.

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The T3300SL Personal Computer is shown in Figure 1-1. Its system configuration is shown in Figure 1-2.

Figure 1-1 T3300SL personal computer

HDD

Sub Battery

PJ21

PJ5

PJ10

Keyboard LCD

PJ15

Display

Switch

PJ12

AC Adapter

Power Supply

Board

PJ9

PJ2

PJ19

PJ4

PJ13

PJ11

LED

Battery Pack

RTC Battery

PS/2 Mouse

FDD

Figure 1-2 System unit configuration

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1.2 The System Unit Block Diagram

Figure 1-3 is a block diagram of T3300SL system unit.

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Figure 1-3 Block diagram

The T3300SL system board diagrammed in Figure 1-3 is composed of the following major components:

❑ 80386SL-25 CPU ❑ Socket for an optional 80387SX-25 Numeric Data Processor (NDP) ❑ 82360SL ISA peripheral I/O chip contains the following components:

Two Direct Memory Access Controllers (DMACs): 82C37A Two Programmable Interrupt Controllers (PICs): 82C59A Two Programmable Interval Timers (PITs): 82C54

(T3300SL uses one PIT)

Two Serial Input/Ouput Controllers (SIOs): 16C450

(T3300SL uses one SIO)

One Real Time Clock (RTC): 146818AF

❑ Super Integration (SI), T9920, which stores the following components:

One Floppy Disk Controller (FDC): TC8565 One Variable Frequency Oscillator (VFO): TC8568

❑ Keyboard Controller (KBC): M37452M4 ❑ Power Supply Controller (PSC): U47C660 ❑ Memory:

Standard RAM: 2MB BIOS ROM: 128KB (96KB are used)

BIOS ROM contains the Initial Reliability Test (IRT), the system’s

Basic Input/Output System (BIOS), and the video BIOS. Video RAM: 256KB Cache memory: 64KB Optional memory cards can expand the memory to a maximum of 18MB.

❑ IC card controller gate array: GA-ICCNT (144-pin) ❑ Refresh controller gate array: GA-REFCNT (44-pin) ❑ VGA display controller (WD90C21): PVGA1F (132-pin)

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❑ The following Oscillators (OSCs):

50.0MHz OSC (X1) and 16.0MHz OSC (X2) are used for the CPU.

14.7456MHz OSC (X3) is used for the COM.

14.31818MHz OSC (X4) is used for the KBC. 24MHz OSC (X5) is used for the FDC and VFO.

32.768KHz OSC (X6) is used for the RTC.

44.9MHz OSC (X7), 28.322MHz OSC (X8), and 25.175MHz OSC (X9) are used for the

video.

See Appendix A for the locations of the oscillators on the system board.

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1.3 3.5-inch Floppy Disk Drive

Recording method Modified Frequency M odulation (M FM)

The T3300SL 3.5-inch Floppy Disk Drive (FDD) is a thin, high performance, reliable drive that supports 720KB (formatted ) 2DD and 1.44MB (formatted) 3.5-inch floppy diskettes.

The T3300SL FDD is shown in Figure 1-4. Specifications for the FDD are described in Table 1-1.

Figure 1-4 3.5-inch FDD

Table 1-1 3.5-inch FDD specifications

Item 2-Mbyte mode 1-Mbyte mode

Storage capacity (Kbyte) Unformatted Formatted Number of heads 2 2 Number of cylinders 80 80 Access time (ms) Track to track Average Head settling time Recording track density (tpi) 135 135 Data transfer rate (Kbps) 500 250 Rotation speed (rpm) 300 300

2,000 1,440

3 94 15

1,000

720

3 94 15

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1.4 2.5-inch Hard Disk Drive

Recording metho

-7 RLL

The 80MB or 120MB (formatted) Hard Disk Drive (HDD) is a random access, nonvolatile storage device. It is equipped with a non-removal 2.5-inch magnetic disk and mini-Winchester type magnetic heads.

The T3300SL HDD is shown in Figure 1-5. Specifications for the HDD are described in Table 1-2.

Figure 1-5 2.5-inch HDD

Table 1-2 2.5-inch HDD specifications

It em

Sto rage capacity Formatted (MB)

Num ber of disks 2 2 2 Data heads 4 4 4 Data surfaces 4 4 4 Tr acks per surface 7 91(+ 2) 97 7 934 Sectors per track 35(+1) 43 (+3) 55(+1) Bytes per sector 512 512 512 Access time (ms)

Track to track Average Maximum

Rotation speed (r pm) 3,118 3,200 3,200 Data transfer rate (MB/S)

To/from media Interleave 1:1 1:1 1:1

d 1

JDE2085M MK2024FC MK 2124FC

85 .68 86.0 130.1

9 2 5 4 7

5.0M 5.0M 6.5M

80MB 120 MB

5 19 40

5 1 7 3 6

* Run Length Limited

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1.5 Keyboard

The 82-key (USA) or 84-key (European) keyboard is mounted on the 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 1-6.

See Appendix E for optional keyboard configurations.

Figure 1-6 Keyboard

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1.6 Sidelit Liquid Crystal Display

FL frequency (KHz) 35 to 43

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

1.6.1 LCD Module

The T3300SL sidelit LCD supports 640x480 pixels with the High Resolution Graphics Subsystem (HRGS) and a 32 levels of gray (at a resolution of 320 x 200). 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, 4-bit lower data signal), and shift clock for data transmission from the PVGA1F Video Controller. All signals are CMOS-level compatible.

The sidelit LCD is shown in Figure 1-7. Specifications for the LCD are described in Table 1-3.

Figure 1-7 Sidelit LCD

Table 1-3 Sidelit LCD specifications

Item Specifications

Numbe r of dots (dots) 640 x 480 Dot dimension (mm) 0.24(W) x 0.24 (H) Dot pitch (mm) 0.27 (W) x 0.27 (H) Display are a (mm) 196.0 (W) x 147.06 (H) Contrast 15:1 (typ.) FL c urrent (mA) 4.0 to 6.0

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1.6.2 FL Inverter Board

Bounds of current (mA) 2.5 - 5.5

The FL inverter board supplies the high frequency current needed to illuminate the LCD’s fluorescent lamp.

The specifications for the FL inverter board are described in Table 1-4.

Table 1-4 FL inverter board specifications

Ite m Specifications

Input Voltage (VDC) 11- 26

Power (W) 2.8 (Max.)

Output

Voltage Current Frequency

(VAC) 1100 (r.m.s.)

(mA) 5.5 (r.m.s.)

(KHz) 44

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1.7 Power Supply Board

Side lit LCD (DSPV) +12 to +18.9 200

The power supply board supplies five voltages to the system board. The power supply board has one microprocessor which operates at 500KHz.

The power supply board contains the following functions:

❑ Determines if the AC adapter or battery is connected to the computer. ❑ Detects DC output and circuit malfunctions. ❑ Controls the LED indicator panel and speaker. ❑ Turns the battery charging system on and off and detects a fully charged battery. ❑ Determines if the power can be turned on and off. ❑ Provides more accurate detection of a low battery. ❑ Calculates the remaining battery capacity.

The power supply board is shown in Figure 1-8 and the output ratings are specified in Table 1-5.

Figure 1-8 Power supply board

Table 1-5 Power supply board output rating

Item

System logic, FDD, HDC, HDD (VCC) +5 ±5 2,600 Backup RAM (R AMV) +4.7 ±5 950 RS-232-C (VDD) +12 ±5 75 RS-232-C (VEE) -9 ±15 60

voltage

(V)

Regulation

Tolerance

(%)

Maximum

Current

(mA)

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Chapter 2 Troubleshooting Procedures

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Contents

2.1 T3300SL Troubleshooting ...................................................................................................2-5

2.2 Troubleshooting Flowchart ..................................................................................................2-6

2.3 Power Supply Board Troubleshooting Procedures ...............................................................2-8

Procedure 1 AC Adapter Check ...................................................................................2-8

Procedure 2 Battery Indicator Function Check ............................................................ 2-9

Procedure 3 Power Supply Board Connection Check................................................. 2-10

2.4 System Board Troubleshooting Procedures ........................................................................ 2-12

Procedure 1 Message Check ...................................................................................... 2-12

Procedure 2 Printer Port LED Check ......................................................................... 2-15

Procedure 3 Diagnostic Test Program Execution Check ............................................ 2-19

2.5 Floppy Disk Drive Troubleshooting Procedures ................................................................. 2-20

Procedure 1 FDD Head Cleaning Check .................................................................... 2-20

Procedure 2 Internal and External FDD Check .......................................................... 2-20

Procedure 3 Diagnostic Test Program Execution Check ............................................ 2-21

Procedure 4 Connector Check and Replacement Check............................................. 2-22

2.6 Hard Disk Drive Troubleshooting Procedures.................................................................... 2-23

Procedure 1 Partition Check ...................................................................................... 2-23

Procedure 2 Message Check ...................................................................................... 2-24

Procedure 3 Format Check ........................................................................................2-25

Procedure 4 Diagnostic Test Program Execution Check ............................................ 2-26

2.7 Keyboard Troubleshooting Procedures ..............................................................................2-27

Procedure 1 Diagnostic Test Program Execution Check ............................................ 2-27

Procedure 2 Connector and Replacement Check ........................................................ 2-27

2.8 Display Troubleshooting Procedures .................................................................................2-28

Procedure 1 Brightness and Contrast Volume Check................................................. 2-28

Procedure 2 External CRT Check .............................................................................. 2-28

Procedure 3 Diagnostic Test Program Execution Check ............................................ 2-28

Procedure 4 Connector Check .................................................................................... 2-29

Procedure 5 Replacement Check ...............................................................................2-29

Tables

Table 2-1 Power supply error statuses ...................................................................................... 2-9

Table 2-2 Printer port LED error codes .................................................................................. 2-17

Table 2-3 Floppy disk drive error codes and statuses .............................................................2-21

Table 2-4 Hard disk drive error codes and statuses ................................................................. 2-26

Figures

Figure 2-1 Troubleshooting flowchart .......................................................................................2-6

Figure 2-2 Printer port LED..................................................................................................... 2-15

Figure 2-3 Reading the printer port LED .................................................................................2-15

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2.1 T3300SL Troubleshooting

This chapter describes how to determine if a Field Replaceable Unit (FRU) in the T3300SL is causing the computer to malfunction. The FRUs covered are:

❑ Power supply board ❑ System board ❑ Floppy Disk Drive ❑ Hard Disk Drive ❑ Keyboard ❑ Display

The following tools are necessary for implementing the T3300SL troubleshooting procedures.

❑ T3300SL Diagnostics Disk ❑ Phillips head screwdriver (2mm) ❑ Toshiba MS-DOS system disk ❑ 2DD or 2HD formatted work disk for the floppy disk drive testing ❑ Cleaning disk kit for the floppy disk drive troubleshooting ❑ Printer port LED ❑ RS-232-C wraparound connector ❑ Printer wraparound connector ❑ Multimeter ❑ External 5.25-inch floppy disk drive ❑ External CRT

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2.2 Troubleshooting Flowchart

Use the flowchart in Figure 2-1 as a guide to determine which FRU troubleshooting procedures to execute. Before performing the flowchart steps, verify the following:

❑ Verify with the customer that Toshiba MS-DOS is loaded on the computer. Other

non-Toshiba operating systems will cause the computer to malfunction.

❑ Make sure all optional equipment is disconnected from the computer. ❑ Make sure the floppy disk drive is empty.

NOTE: If you forget the password and cannot start up the computer, connect the printer port wraparound board (F31PRT), then turn the POWER switch on. The computer will override the password function by erasing the current password.

START

Insert the Toshiba MS-DOS

diskette into the FDD.

Turn the Power Switch ON

and wait 5 Seconds.

Does the

POWER INDICATOR

illuminate?

YES

Is an

Error Message

displayed?

Is the

MEMORY TEST XXXXKB

message displayed

YES

Does the

MEMORY TEST XXXKB

message proceed from

0KB to 640KB?

YES

Perform Power Supply Board Troubleshooting Procedures in Section 2.3.

Perform System Board Troubleshooting Procedures in Section 2.4.

Perform Display Troubleshooting Procedures in Section 2.8.

Perform System Board Troubleshooting Procedures in Section 2.4.

Figure 2-1 Troubleshooting flowchart

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YES

If the Password = prompt is

displayed, type in the user password

and press Enter.

Is Toshiba

MS-DOS being

loaded?

YES

Insert the ASP Diagnostics

diskette into the FDD, type

A:TESTCE33, and press ENTER.

Do typed

characters appear

correctly?

YES

Connect wraparound connectors.

Execute the Running Test

several times.

Is an error

detected by the

Running Test

System is normal.

YES

Perform Floppy Disk Drive Troubleshooting Procedures in Section 2.5.

Perform Keyboard Troubleshooting Procedures in Section 2.7.

After confirming which test has detected an error, perform the appropriate troubleshooting procedures.

END

Figure 2-1 Troubleshooting flowchart (continued)

If the Diagnostic Program does not detect any errors, the problem may be an intermittent one. Execute the Running Test program several times to isolate the problem.

After confirming which diagnostic test detected an error by checking the Log Utilities function, 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 board troubleshooting procedures in Section 2.4.

2. If an error is detected on the keyboard test, perform the keyboard troubleshooting proce-

dures in Section 2.7.

3. If an error is detected on the floppy disk test, perform the floppy disk drive troubleshooting

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.

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2.3 Power Supply Board Troubleshooting Procedures

The T3300SL’s power supply board controls many functions and components in the T3300SL. To determine if the power supply board is functioning properly, start with Procedure 1 and continue with the other procedures as instructed.

Procedure 1: AC Adapter Check Procedure 2: Battery Indicator Function Check Procedure 3: Power Supply Board Connection Check

Procedure 1 AC Adapter Check

The T3300SL’s AC adapter converts AC power to DC power and contains a charging circuit which charges T3300SL’s batteries. The adapter connects to the DC IN 18V connector on the back of the computer. When the AC adapter is connected and the T3300SL and the power is turned off, the AC adapter charges the batteries.

The indicator panel displays the charge status of the battery pack and whether or not the AC adapter is connected and supplying power. The indicator labeled Battery glows amber when the AC adapter is charging the battery pack.

If the Battery indicator does not light, the AC adapter is not supplying power to the T3300SL or the computer is turned off.

When the Battery indicator is red, the AC adapter is connected and supplying power to the T3300SL.

If the indicator is flashing red, the AC adapter’s voltage supply is abnormal or the power supply is not functioning properly.

If any of the above indicator conditions are abnormal, make sure the LED indicator lights are not burned out before performing the following checks.

Check 1 Make sure the AC adapter’s cable is firmly plugged into the DC IN 18V connector on

the back of the computer.

Check 2 If the Battery indicator is flashing red, its voltage output is abnormal. Connect a new

AC adapter and turn the T3300SL on again to verify the indicator condition.

Check 3 The battery pack may be malfunctioning. Replace the battery pack with a new one

and turn the computer on again. If the problem still exists, perform Procedure 2.

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Procedure 2 Battery Indicator Function Check

Fh Under c urrent of charging current

When a power supply problem occurs, the Battery indicator shows the 4-bit status by blinking at various speeds corresponding to the type of problem.

The battery indicator lights for two seconds at first, and then blinks on for one second (indicating a binary 1) or a half second (indicating a binary 0) at half-second intervals from bit 0 to bit 3 sequentially.

For example, the following timing chart shows the error status 5h (0101). Read the timing chart from right to left to determine the correct hexadecimal value.

Bit 0 Bit 1 Bit 2 Bit 3

1 0 1 0

Battery

OFF

2s 1s 0.5s 1s 0.5s

0.5s 0.5s 0.5s

➝

Time

The power supply error statuses and their meanings are described in Table 2-1. When the Battery indicator blinks at random, the AC adapter or charging circuit may be damaged.

In this case, replace the AC adapter with a new one.

Table 2-1 Power supply error statuses

Status Meaning

1h Over voltage of AC adapter output voltage (more than +18V±5%) 2h Abnormal temperature in the s ystem (les s than -20°C or more than 70°C) 3h Abnormal charging (The system cannot stop charging.) 4h Over current of charging current 5h Abnormal charging voltage 6h Abnormal battery voltage 7h Abnormal VCC (+5) voltage 8h Abnormal RAMV (+5V for DRAM) voltage 9h VEE (-9V) is shorted

Ah VDD (+12V) is shorted

Bh DSPV (+ 12V to +18V for FL) is shorted Ch Desk Station IV was turned off before the T3300SL

Dh Battery terminal is shorted

Eh Under voltage of AC adapter output voltage (less than +18V±5%)

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After investigating the Battery indicator, start with Check 1 below. Check 1 If the Battery indicator displays error status 1h, 4h, 5h, Eh, or Fh, replace the AC

adapter with a new one. If the same problem still appears, perform Procedure 3.

Check 2 If the Battery indicator displays error status 6h or Dh, replace the battery pack with a

new one. If the same problem still appears, perform Procedure 3.

Check 3 If the Battery indicator displays error status Ch, remove the T3300SL from the Desk

Station IV. Turn the T3300SL on. It should operate normally.

Check 4 If the Battery indicator displays error status 2h, place the T3300SL in an environ-

ment between -20°C and 70°C until the T3300SL is at the ambient temperature. Repeat the steps which caused the T3300SL to operate abnormally. If the same problem still appears, perform Procedure 3.

Check 5 If the Battery indicator displays error status 3h, 7h, 8h, 9h, Ah, or Bh, perform

Procedure 3.

Procedure 3 Power Supply Board Connection Check

The power supply board is connected to other components by various cables. These cable connectors can become disconnected from the power supply board, thus causing the T3300SL to malfunction. To check these connections, it is necessary to disassemble the T3300SL. Refer to Chapter 4, Replacement Procedures, for more information about how to disassemble the T3300SL. Then perform Check 1.

Check 1 The following cable connections connect the power supply board to other components.

Make sure these connections are secure and that none of the cable are pinched or damaged.

Sub battery

PJ4 Battery PJ2 PJ5 System board terminal PJ3

PJ1

AC adapter socket board

If any of these connections are loose, firmly secure them. Replace any broken or damaged cables. Execute the procedures that were causing the T3300SL to malfunction. If the computer still does not function properly, perform Check 2.

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Check 2 The Battery indicator status lets you know when a unit should be replaced. Refer to

3 2h, 3h, 7h, 8h, 9h, Ah, Bh Power supply board

the following table.

Condition Battery Indicator Replacement Unit

1 1h, 4h, 5h, Eh, Fh AC adapter 2 6h, Dh Battery pack

If condition 1 or 2 remains after replacement of the indicated unit, then replace the power supply board.

If condition 3 remains after replacing the power supply board, then replace the system board.

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2.4 System Board Troubleshooting Procedures

To determine if the system board is defective or not functioning properly, perform the following procedures beginning with Procedure 1 and continuing with the other procedures as instructed.

Procedure 1: Message Check Procedure 2: Printer Port LED Check Procedure 3: Diagnostic Test Program Execution 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 displayed, perform Check 1. If not, go to Procedure 2. If MS-DOS is properly loaded, go to Procedure 3.

Check 1 If the following error message is displayed on the screen for one second, the external

FDD is not connected, even though the external FDD/PRT option in the SETUP program is set to FDD A. Set the external FDD/PRT option to FDD B or PRT, or connect the external FDD and restart the system. If any other error message appears, perform Check 2.

*** FDD A is not installed ***

Check 2 If one of the following error messages is displayed on the screen, press any 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 one or the data is lost.

If you press any 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 3.

(a) *** Error in CMOS. Bad HDD type ***