Toshiba T200, T200CS User Manual
1.1 Features
The Toshiba T200/T200CS Pen Computer uses extensive Large Scale Integration (LSI), and
Complementary Metal-Oxide Semiconductor (CMOS) technology to provide minimum size
and weight, low power usage and high reliability. These computers include the following:
❑ Microprocessor
The T200/T200CS uses an SL Enhanced Intel 486DX2-40 microprocessor that
operates at 40 MHz and 3.3 volts.
❑ Math co-processor
The T200/T200CS has a math co-processor stored in the i486DX2 microprocessor.
❑ Cache memory
The T200/T200CS has an 8 KB cache memory stored in the i486DX2 microprocessor.
❑ Disk storage
The T200/T200CS has an internal 1.8-inch IDE 80 Megabyte (MB) Hard Disk Drive
(HDD).
❑ Memory
The T200/T200CS comes standard with 4 MB of CMOS RAM. This includes 640
KB of conventional memory and 3,328 KB of extended memory, which can be utilized
as expanded memory compatible with Lotus/Intel/Microsoft Expanded Memory
Specifications (LIM-EMS).
❑ Display screen
The T200 has a 9.5-inch high resolution monochrome Liquid Crystal Display (LCD)
which displays 640x480 pixels with a 16-level gray scale, and an electromagnetic
derivative tablet (transreflective).
The T200CS has a 9.5-inch high resolution Supertwist Nematic (STN) color LCD
which displays 640x480 pixels and 256 colors, and an electromagnetic derivative
tablet.
The T200/T200CS internal display controller supports Video Graphics Array (VGA)
on the internal/external display and Super VGA (SVGA) on the external display.
❑ Batteries
The T200/T200CS has three different batteries: a main battery, a backup battery, and
a Real Time Clock (RTC) battery.
T200/T200CS 1-1
❑ Exp. memory slot
An optional 4, 8, or 16 MB memory card can be installed in the memory slot.
❑ PC card slot (Type II, Type III)
The T200/T200CS has two PC card slots which support Personal Computer Memory
Card International Association (PCMCIA) standard version release 2.0 and MiNC
Toshiba modem card.
❑ FDD port
An optional external 3.5-inch Floppy Disk Drive (FDD) supports 2HD (1.44 Mbytes)
floppy disks and 2DD (720 Kbytes) floppy disks.
❑ Printer port
The T200/T200CS's Centronics-compatible printer interface port can be connected to
the printer through a parallel printer cable.
❑ Serial port
The T200/T200CS has one 9-pin serial interface port.
❑ Ext. keyboard port
The T200/T200CS has an external keyboard interface port for connection with a PS/2compatible keyboard.
❑ Ext. monitor port
The T200/T200CS has an external monitor interface port for connection with an
analog VGA or SVGA display.
❑ 72-pin Expansion port
The T200/T200CS has a 72-pin Expansion port which enables connection of a 72-pin
Expansion connector. The Expansion port allows connection of a PS/2 keyboard,
external monitor, printer, serial I/O and optional 3.5-inch FDD.
❑ Stylus
The T200/T200CS has one cordless stylus (pen), which is used to enter information
into the computer. The stylus does not need batteries.
1-2 T200/T200CS
The T200/T200CS Pen Computer is shown in Figure 1-1. Its system configuration is shown
in Figure 1-2.
Figure 1-1 T200/T200CS Pen Computer
Figure 1-2 T200/T200CS System Unit Configuration
T200/T200CS 1-3
1.2 System Unit Block Diagram
Figure 1-3 is a block diagram of the computer's system unit.
* These port signals also output to the 72-pin Expansion port.
1-4 T200/T200CS
Figure 1-3 Block Diagram
The computer's system board is composed of the following major components:
❑ SL Enhanced i486DX2-40
❑ 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
• Two Serial Input/Output Controllers (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 with 128 bytes of memory is used. Fourteen bytes of memory are
used for the calendar and clock and the remaining 114 bytes for system configuration
data.
OSC (X2) generates 32.768 KHz for RTC.
❑ A Keyboard Controller (KBC)
One 80C42 chip is used. This KBC includes the keyboard interface controller and
controls the external keyboard.
❑ The following memories:
Standard RAM: 4 MB
Cache memory: 8 KB (inside CPU)
BIOS ROM: 128 KB (96 KB are used)
This ROM contains Initial Reliability Test (IRT),
Basic Input/Output System (BIOS), and video BIOS.
Video RAM: 256 KB
Optional memory cards expand memory to a maximum of 20 MB.
VGA display controller (WD90C24A)
❑
This controller controls internal VGA display and external SVGA compatible display.
❑ Clock Generator receives 14.31818 MHz (X3) and generates the following frequen-
cies:
• 20 MHz for the CPU (CPU operates at 40MHz.)
• 14.7477 MHz for the COM
• 24 MHz for the FDC and VFO
• 16 MHz is used for the System Controller GA
• 14.31818 MHz is used for the T9901 (SI)
T200/T200CS 1-5
❑ Gate Arrays
System Controller Gate Array
This gate array has the following functions:
• CPU Controller
• Memory Controller
-DRAM Controller
-Compatible Bus Interface Controller
• SMI Controller
• VL Bus Controller
• Bus Controller
-Compatible Bus Interface Controller
-Compatible Access Controller
-DMA Controller
-I/O Controller
• Address Latch Controller
-32-Bit to 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
• Processing Speed Controller
• Data Bus Change Controller
• Data Latch
PCMCIA Controller Gate Array
This gate array has the following functions:
• Memory Card Controller
-PCMCIA IC Card Controller
-Toshiba Modem Card Controller
1-6 T200/T200CS
SMI Controller Gate Array
This gate array has the following functions:
• Tablet Controller
-Tablet Microprocessor Communication Controller
-SMI Controller
• Others
-Contrast Adjust PWM Controller
T200/T200CS 1-7
1.3 Optional External 3.5-inch Floppy Disk Drive
The computer's optional 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 computer's FDD is shown in Figure 1-4. The specifications for the FDD are provided in
Table 1-1.
Figure 1-4 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 1,474 737
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)
1-8 T200/T200CS
1.4 1.8-inch Hard Disk Drive
The computer’s 80-MB (formatted) Hard Disk Drive (HDD) is a random access non-volatile
storage device. It has a non-removable 1.8-inch magnetic disk and mini-winchester type
magnetic heads.
The HDD is shown in Figure 1-5. Specifications for the HDD are provided in Table 1-2.
Figure 1-5 1.8-Inch HDD
Table 1-2 1.8-Inch HDD Specifications
Item 80 MB
(ZA1094)
Storage capacity (MB)
Formatted 85.0
Number of disks 2
Data heads 3
Data surfaces 3
Tracks per surface 2,750
Sectors per track 20
Bytes per sector 512
Access time (ms)
Track to track 8
Average 18
Maximum 35
Rotation speed (rpm) 3,571
Data transfer rate (bps)
To/from media 2.5M
Interleave 1:1
T200/T200CS 1-9
Recording method 1-7 RLL
1.5 Monochrome LCD
The monochrome LCD is composed of an LCD module, a Fluorescent Lamp (FL), and an FL
inverter board.
1.5.1 Monochrome LCD Module
The computer's monochrome LCD supports 640 x 480 pixels with a video controller and 16
levels of gray. The video controller includes the functions of the VGA and SVGA for external
display.
The LCD receives vertical and horizontal synchronizing signals, 8-bit data signals (4-bit upper
block data signal and 4-bit lower block data signal), and shift clock for data transmission. All
signals are CMOS-level compatible.
The sidelit LCD is shown in Figure 1-6 and its specifications are provided in Table 1-3.
Figure 1-6 Monochrome LCD
Table 1-3 Monochrome LCD Specifications
Item Specifications
Number of dots (dots) 640 x 480
Dot pitch (mm) 0.27 (W) x 0.27 (H)
Display area (mm) 196 (W) x 147.6 (H)
Contrast 10:1 (typically)
FL current (mA) 5.5 (r.m.s.)
FL frequency (KHz) 39
1-10 T200/T200CS
1.5.2 Monochrome LCD Fluorescent Lamp (FL) Inverter Board
The FL inverter board supplies the high-frequency current needed to illuminate the LCD's FL.
The FL inverter board is shown in Figure 1-7 and its specifications are provided in Table 1-4.
Figure 1-7 Monochrome LCD FL Inverter Board
Table 1-4 Monochrome LCD FL Inverter Board Specifications
Item Specifications
Input Voltage (VDC) 5
Power (W) 2.7
Output Voltage (VAC) 1,100 (r.m.s)
Current (mA) 5.5 (r.m.s)
Frequency (KHz) 39
T200/T200CS 1-11
1.6 STN Color LCD
The STN Color Liquid Crystal Display (LCD) contains an LCD module, a Fluorescent Lamp
(FL), and an FL inverter board.
1.6.1 STN Color LCD Module
The computer's STN color LCD supports 640x480 pixels with a video controller. This video
controller includes the functions of VGA and SVGA for external display.
The LCD receives vertical and horizontal synchronizing signals, 16-bit data signal (8-bit upper
block data signal, 8-bit lower block data signal), display enable signal, and shift clock for data
transmission. All signals are CMOS-level compatible.
The STN LCD is shown in Figure 1-8. The LCD specifications are provided in Table 1-5.
Figure 1-8 STN Color LCD
Table 1-5 STN Color LCD Specifications
Item Specifications
Number of Dots (dots) 640x480
Dot pitch (mm) 0.3(W)x0.3(H)
Display area (mm) 195 (W)x147 (H)
Contrast 18:1 (Typically)
FL current (mA) 6.0 (r.m.s.)
FL frequency (KHz) 47
1-12 T200/T200CS
1.6.2 STN Color LCD Fluorescent Lamp (FL) Inverter Board
The FL inverter board supplies high frequency current to light the LCD’s Fluorescent Lamp.
The FL inverter board is shown in Figure 1-9 and its specifications are described in Table 1-6.
Figure 1-9 STN Color LCD FL Inverter Board
Table 1-6 STN Color LCD FL Inverter Board Specifications
Item Specifications
Input Voltage (VDC) 5
Power (W) 4
Output Voltage (VAC) 1,100 (r.m.s.)
Current (mA) 6.0 (r.m.s.)
Frequency (KHz) 47
T200/T200CS 1-13
1.7 Tablet
The tablet is the internal digitizer, which also acts as the interface between the stylus and the
computer.
The tablets are shown in Figures 1-10 and 1-11 and their specifications are provided in Table
1-7.
Figure 1-10 T200 Tablet
Item Specifications
Material Electromagnetic derivative
Voltage (VDC) 5V
Current (mA) 30 (In use)
Resolution (mm) 0.1
Precision (mm) ±0.4
Data transfer (point/sec) 205
1-14 T200/T200CS
Figure 1-11 T200CS Tablet
Table 1-7 Tablet Specifications
23 (In suspend)
5.2 (In sleep)
1.8 Power Supply
The power supply supplies five kinds of voltages to the computer's system board. The
computer's power supply has one microprocessor and it operates at 500 Hz. It contains 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 icon and speaker.
4. Turns the battery charging system on and off and detects a fully charged
battery.
5. Determines if the power can be turned on and off.
6. Provides more accurate detection of a low battery.
7. Calculates the remaining battery capacity.
The power supply output rating is specified in Table 1-8.
Table 1-8 Power Supply Output Rating
DC Regulation Maximum
Use for Name voltage tolerance current Ripple
System logic, FDD, HDD VCC +5 ±5 1,720 100
RS-232C, Flash ROM 12V +12 ±5 120 240
RAM, CPU B3V +3.3 ±5 1243 100
RS-232C -9V -9 15 15 150
(V) (%) (mA) (mV)
T200/T200CS 1-15
1.9 Batteries
The computer has three types of batteries:
❑ Main battery pack
❑ Backup battery
❑ Real Time Clock (RTC) battery
Battery specifications are provided in Table 1-9.
Table 1-9 Battery Specifications
Battery name Material Output voltage Capacity
Main battery pack Lithium-Ion 10.8 V 3,000 mAH
Backup battery Nickel Metal Hydride 3.6 V 120 mAH
RTC battery Lithium-Vanadium 3.0 V 50 mAH
1.9.1 Main Battery
The removable main battery pack is the primary power source when the AC adapter is not
attached. The main battery recharges the backup battery when system power is on. The
backup and main battery maintain the state of the computer system when AutoResume is
enabled. The main battery is shown in Figure 1-12.
1-16 T200/T200CS
Figure 1-12 Main Battery
❏ Battery Indicator
The battery indicator is located on the top cover of the computer. 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 or an AC adapter is attached.
Green The battery is fully charged. (An AC adapter is attached.)
No light The AC adapter is disconnected from the computer or is connected, but
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 and will not begin
charging until a few minutes after the AC adapter is connected.
❏ The AC adapter is not receiving power.
T200/T200CS 1-17
1.9.2 Battery Charging Control
Battery charging is controlled by a power supply microprocessor mounted on the power
supply. The microprocessor turns charging on or off and detects a full charge when the AC
adapter and main battery pack are attached to the computer. The system charges the main
battery pack using quick or trickle charge.
❏ Quick Battery Charge
When the AC adapter is attached, there are two types of charge: quick charge when the
system is powered off and trickle charge when powered on. Table 1-10 gives quick charging
time requirements.
Table 1-10 Time Required For Quick Charges
Charge Charging time
Quick charge About 3 hours
(power off)
Quick charge About 8 hours
(power on)
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.
3. The battery or AC adapter output voltage is abnormal.
4. The charge current is abnormal.
❏ Trickle Battery Charge
When the main battery is fully charged and the AC adapter is attached, the power supply
microprocessor changes quick charge to trickle charge.
1-18 T200/T200CS
1.9.3 Backup Battery
The backup battery maintains data for AutoResume. The power source used to back up
AutoResume 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 10 H
Power Off 10 H
(with AC Adapter or main battery)
Power Off Doesn’t charge
(Without AC Adapter and main battery)
Data preservation period (full charge) 8 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
Time
Charging Time Power On 48 H
Power Off Doesn’t charge
Data preservation period (full charge) 1 month
T200/T200CS 1-19
1.10 Stylus
The stylus is used to enter information into the computer by writing directly onto the screen.
You can write letters or numerals to enter data, draw gestures to enter commands, or tap to
select from menus.
The stylus is shown in Figure 1-13.
Figure 1-13 The Stylus
1-20 T200/T200CS
2.1 Troubleshooting
Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) is causing a malfunction. FRUs covered are:
1. System Board
2. Floppy Disk Drive
3. Hard Disk Drive
4. Display Module
5. Tablet
Diagnostics Disk operations are described in Chapter 3 and detailed replacement procedures
are given in Chapter 4.
The following tools are necessary for troubleshooting:
1. T200/T200CS Diagnostics Disk
2. Phillips-head screwdriver (2 mm)
3. 2DD or 2HD formatted work disk for FDD testing
4. Printer port LED
5. RS-232-C wraparound connector
6. Printer wraparound connector
7. Multimeter
8. Parallel cable (standard equipment)
9. External PS/2-type keyboard
10. Optional external 3.5-inch FDD
T200/T200CS 2-1
2.2 Troubleshooting Flowchart
Use the flowchart in Figure 2-1 as a guide to determine which 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 the pass-
word. If the user has forgotten the password, connect the printer port wraparound
board (F31PRT), then turn the POWER switch on. The computer will skip the password function.
❑ Make sure all optional equipment is disconnected.
2-2 T200/T200CS
T200/T200CS 2-3
Figure 2-1 Troubleshooting Flowchart (1/2)
Figure 2-1 Troubleshooting Flowchart (2/2)
2-4 T200/T200CS
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 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
procedures 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.
5. If an error is detected on the tablet test, perform the tablet troubleshooting procedures in Section 2.9.
T200/T200CS 2-5
2.3 Power Supply Troubleshooting
The power supply controls many functions and components. To determine if the power
supply is functioning properly, start with Procedure 1 and continue as instructed. The procedures described in this section are:
Procedure 1: Power LED Indicator Check
Procedure 2: Battery LED Indicator Check
Procedure 3: PCB Replacement Check
2-6 T200/T200CS
Procedure 1 Power LED Indicator Check
The AC adapter converts AC to DC power and contains a charging circuit for charging the
batteries. The adapter connects to the Power socket connector on the back side of the computer. When the AC adapter is connected and power is off, the AC adapter charges the
batteries.
The Power LED displays whether or not the AC adapter is connected and supplying power.
❑ When the Power LED is green, the AC adapter is connected and supplying power to
the computer.
❑ If the Power LED does not light, the AC adapter is not supplying power to the com-
puter or the AC adapter is not attached to the computer, go to Check 1.
❑ If the Power LED is flashing orange, the AC adapter voltage supply is abnormal or the
power supply is not functioning properly, go to Check 2.
If any of the above indicator conditions are abnormal, make sure the Power LED indicator
lights are not burned out before performing the following checks:
Check 1 Make sure the correct AC adapter cable is firmly plugged into the Power socket
on the back of the computer.
Check 2 If the Power LED flashes orange when the AC adapter is connected, its voltage
output is abnormal. Connect a new AC adapter and turn the computer on again to
verify the indicator condition. If the problem still exists, perform Check 3.
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 persists, perform Check 4.
Check 4 Place the computer in an environment between –20°C and 70°C until at ambient
temperature. Repeat the steps which caused abnormal operation. If the same
problem persists, perform Procedure 3.
T200/T200CS 2-7
Procedure 2 Battery LED Indicator Check
The battery LED indicator shows battery charging status. The LED, identified by a battery
icon on the front of the computer, glows orange when the AC adapter is charging the battery
pack.
❑ If the Battery LED indicator glows green, the AC adapter is connected and the battery
is fully charged.
❑ If the Battery LED indicator glows orange, the AC adapter is connected and the
battery is being charged.
❑ If the Battery LED indicator does not glow, go to Check 1.
Check 1 Make sure the AC adapter cable and AC cord are firmly plugged into the Power
socket and wall outlet. If connected correctly, go to Check 2.
Check 2 Make sure the battery pack is installed correctly. Go to Check 3 if it is.
Check 3 Remove the battery pack and check that the battery terminal is clean and not bent.
❑ If the terminal appears dirty, clean gently with a cotton swab dipped in
alcohol.
❑ If the terminal looks bent or damaged, replace the upper system board.
❑ If the battery terminal is clean and not bent, go to Check 4.
Check 4 Connect a new AC adapter. If the Battery LED indicator still does not glow, go
to Check 5.
Check 5 Install a new battery pack. If the Battery LED indicator still does not glow, go to
Procedure 3.
2-8 T200/T200CS
Procedure 3 PCB Replacement Check
The power supply is mounted on the upper system board. The upper system board may be
damaged. Disassemble the computer following the steps described in Chapter 4, Replacement
Procedures, then perform the following checks.
Check 1 Replace the upper system board with a new one and restart the system. If the
problem still exists, go to Check 2.
Check 2 Replace the lower system board with a new one and restart the system. If the
problem persists, other FRUs may be damaged.
T200/T200CS 2-9
2.4 System Board Troubleshooting
This section describes how to determine if the system board is defective or not functioning
properly. Start with Procedure 1 and continue as instructed. The procedures provided are:
Procedure 1: Message Check
Procedure 2: Printer Port LED Check on Boot Mode
Procedure 3: Printer Port LED Check on Resume Mode
Procedure 4: Diagnostic Test Program Execution Check
Procedure 5: Connection and Replacement Check
2-10 T200/T200CS
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