Toshiba T-Series T3100e User manual

File No. 960-010
1.1 GENERAL
Toshiba Personal Computer T3100e is a compact and light-
weight portable personal computer. The T3100e is a high-
performance system with special features. The CPU is the
80286-12 16-bit microprocessor. The standard memory has a
capacity of 1 Mbyte. The hard disk drive (HDD) has a
capacity of 20 Mbytes. The floppy disk drive (FDD) can
support 2DD (720 Kbytes) and 2HD (1.44 Mbytes) floppy disks.
The universal auto-sensing power supply is used for world-
wide usage.
The T3100e system unit consists of the following functional
modules;
System board/Memory board
3.5-inch floppy disk drive
3.5-inch hard disk drive
Plasma display
Keyboard
Power supply unit
Figure 1-1 T3100e personal computer
1-1

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Hard
Disk
Drive
and
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Floppy
Disk
Drive
A-B-PRT
Switch
Optional
Memory 0
..........
Monochrome
Display
orl~----------~
Standard Color
Display
PJ 15
PJ12
PJ6, 11
PJ8,9
S1
IS101,102
or
Printer
PJ 13
External
Floppy
Disk Drive
PJ2,10
System board
Memory board
Two Serial
Devices
_._._.-._._._.-._._._.-.,
............
Option
Card
• 000 OJ,:
0
0 00'
System Unit
PJ2
PJ3,4 ..................
PJ5 I +-: IBM PC compatible 0
card (8-Bit)
..................
PJ14
Cooling Fan
PJ7
PJ1
PJ6
PJ3
L._._._._._._._._._._._._._._._._._._.
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File No.
960-010
The key features of the system unit are:
o A system board and memory board connected by 2 flat
cables.
o An internal 3.5-inch FDD supporting two media types:
2HD (double-side, high-density, double-track)
2DD (double-side, double-density, double-track)
The 2HD and 2DD floppy disks can be formatted with 1.44
Mbytes and 720 Kbytes of storage capacity,
respectively.
o A 20-Mbyte 3.5-inch HDD (hard disk drive) .
o An
internal 82-key keyboard. For most applications it
can be used exactly like a standard typewriter
keyboard.
o An internal 640 x 400 pixel plasma display.
o A universal auto-sensing power supply that can be used
world-wide provides +5 VDC, +12 VDC, -5 VDC and -12 VDC
power to all the components in the system unit,
including the option cards. For the plasma display, the
power supply provides the regulated +205 and +5 VDC
power. The power supply's ventilation fans are driven
by +12 VDC.
o A
lithium battery that keeps the date and time even
when the system unit power is off.
o A parallel printer (or floppy disk drive),
Red/Green/Blue (RGB) direct drive Cathode Ray Tube
(CRT) display, and two SERIAL device connectors,
located on the system unit's rear panel and right side.
The parallel printer connector can be used to connect
an external FDD unit by changing the A-B-PRT switch.
1-3

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File No. 960-010
System board and memory board are composed of the following
components:
System board
o Central processing unit: CPU (80286-12)
The CPU is a 16-bit microprocessor operated at 12 MHz
clock speed.
o Numeric data processor socket for the 80287-12
(optional) .
o
Real time clock: RTC (MC146818)
The RTC continuously keeps the date and time powered by
lithium battery.
o Serial input output: SIO (TC8570)
The SIO controls the RS232C port.
o Variable frequency oscillator: VFO (MB4108A)
The VFO chip is used for FDD control logic.
o Two super integration: SI (JC810, M5M82C800)
SI (JC810) includes the FDC (TC8565), SIO (TC8570), and
PIT (82C54). SI (M5M82C800) includes the two DMACs
(82C37), two PICs (82C59) and one PIT (82C54).
o Gate arrays:
The following gate arrays are used in the system board.
See the T3100e GATE ARRAY SPECIFICATION MANUAL for more
information.
o DMA controller gate array
o MAP controller gate array
o Bus controller gate array
o PLC controller gate array
1-5
DMA3-GA (100 pin)
MAP3-GA (100 pin)
BUS-GA (100 pin)
PLC-GA (100 pin)

File No. 960-010
Memory board
o Keyboard controller: KBC (8742 or 8042)
o Memory
Random access memory : RAM 1 Mbyte
Read only memory : ROM 64 Kbytes (system BIOS)
o Gate array
The following gate array is used in the memory board.
See the T3100e GATE ARRAY SPECIFICATION MANUAL for more
information.
EMS controller gate array : EMS2-GA (100 pin)
1-6

File No. 960-010
1.4 3.5-INCH FLOPPY DISK DRIVE
The 3.5-inch internal FDD is a high performance, reliable
and thin drive that supports 720-Kbyte (formatted) 2DD and
1.44-Mbyte (formatted) 2HD 3.5-inch floppy disks.
The FDD is shown in figure 1-5 and its specifications are
described in table 1-1.
Figure 1-4 3.5-inch FDD
Table 1-1 3.5-inch FDD specifications
Item Specifications
2-Mbvte mode 1-Mbvte mode
Storage Capacity (Kbytes)
Unformatted 2,000 1,000
Formatted 1 440 720
No. of Heads 2 2
No.
of Cylinders
80 80
Access
Time (ms)
1
Track Access 3 3
Average 94 94
Head Settlinq Time 15 15
Recording Density
17434
8717
(bi t per inch)
(MAX)
Data Transfer Rate
500
250
(Kbytes per second)
Rotational
Speed 300 300
(revolutions per
minute)
Recording Method
MFM
(Modified
Frequency
Modulation)
1-7

File No. 960-010
1.5 3.5-INCH HARD DISK DRIVE
The 20-Mbyte (formatted) HDD is a random access type storage
device. It is equipped with non-removable 3.5-inch magnetic
disks and mini-winchester type magnetic heads. The HDD has
three jumper straps which are located on the hard disk
controller (HDC) board.
The HDD is shown in figure 1-5 and its specifications are
described in table 1-2. The jumper straps status are shown
in table 1-3.
Figure 1-5 3.5-inch HDD
1-8

File No. 960-010
Table 1-2 3.5-inch HDD specifications
Item Specifications
20-Mbyte 40-Mbyte
Storage Capacity :
Formatted (Mbytes) 21.4
Number of Disks 1
Data Surfaces 2
Data Heads
2
Tracks per Surface 636
Track Density (tpi)
1,150
Track Capacity :
Formatted (bytes)
16,896
Sectors per Track : (bps)
Physical Sectors
User Sectors
Access Time (ms)
Track to Track
Average
Maximum
Rotation Speed (rpm)
Data Transfer Rate (bps)
To/From Media
To/From Buffer
Start Time (s)
34
33
8
27
50
3,575
1. 25
4
I (0-3575RPM): Typical 5
I Maximum 10
I (0 RPM-READY): Typical 7
I Maximum 15
I Stop Time (s) Typical 5
I Maximum 10
M
M
I Interleave CP3022 3
42.8
1
2
2
1, 047
1, 400
20,480
41
40
8
25
50
3,557
1.5
M
4.5 M
5
10
7
15
5
10
1 1 : 1
1
1 ____________________________ ~C~P~3~0~2~4~~1~~~ ____________ __
IRecording Method 2-7 RLL code
1 ________________________________ L- __ ~(~R~u~n~L~e~n~g~t~h~L~i~m~l~·t~e~d~) ____ _
IRecording Density (ID) (bpi) 21, 594 I 30,871
Table
1-3 HDD jumper
strap status
20-Mbyte
(CP3022 )
20-Mbyte
(CP3024) or 40-Mbyte
I Signal I
Status
ISignall
Status
I E5 I
Short
HSP
Open
I E6 I
Open
C/D Short
I E7 I
Short
DHP
Open
ACT Short
1-9

File No.
960-010
1 . 6 KEYBOARD
The 82-key keyboard is mounted on the system unit. The 82
keys consist of 54 standard keys, 10 function keys, 17
control keys, and Fn key.
The keyboard is a key matrix with one of the 82 keys at each
vertex.
The keyboard is connected to the keyboard controller on the
memory board through a 22-pin flat cable. The keyboard
layout is shown in figure 1-6.
Replace key No.3, 4, 40, 41
Figure 1-6 Keyboard
1-10

File No. 960-010
1 . 7 PLASMA DISPLAY
The plasma display is composed of a display panel and driver
circuits. It receives vertical and horizontal synchronizing
signals, four bit data signals, and shift clock for data
transmission. All signals are TTL level compatible. The
specifications are described in table 1-4. The plasma
display is shown in figure 1-7.
Figure 1-7 Plasma display
Table 1-4 Plasma display specifications
Item
Specifications
No.
of Dots (dots) 640 x400
Dot
Dimension (mm) o. 16 (W)
x 0.24
(H)
Dot Pitch (mm}
0.33 (W) x 0.36
(H)
DisPlav Area (mm)
192
(W)
x 144
(H)
Contrast
more than
1:11 (approx. 1:13)
Color
Neon-Oranqe
Power Requirement
Anode Logic
(E1 ) 5
+/-0.5 V
10 rnA
(min. )
400
rnA (max. )
Cathode
Driver (E2)
205 +/-5 V
3 rnA
(min. ) 160 rnA (max. )
Cathode Logic
(E3) 5 +/-0.5 V
1 rnA
(min. ) 60 rnA
(max.)
Power Consumption
(watts)
35
Mean Time Between
Failure
(MTBF)
(hours)
30.000
1-11

File No. 960-010
1 .8 POWER SUPPLY UNIT
The universal auto-sensing power supply can be used world-
wide and supplies +5, -5, +12, -12 and +205 VDC to the
system.
The power supply unit is housed in the system unit and it
supplies the regulated power to:
1) System board
2) Memory board
3) 3.5-inch floppy disk drive
4) 3.5-inch hard disk drive
5) Plasma display
6) Option boards
7) Cooling fans
The above 2) through 4), 6) and one of cooling fans receive
the power via the system board.
The power supply unit includes an input line filter, line
fuse, cooling fan, power conversion circuitry and
connectors.
Input ratings are:
85 to 138 VAC or 170 to 276 VAC, less than 130 W (when input
rating is 115 VAC, 60 Hz) .
The power supply unit is shown in figure 1-8 and the output
ratings are specified in table 1-5.
Figure 1-8 Power supply unit
1-12

File No. 960-010
Table 1-5 Power supply unit output rating
Function DC
Max. Requration
voltaae current tolerance
SYstem Board
+5 V
5.6 A
+/-
5%
System Board
&
Coolina Fan +12 V
1.1
A
+/-
5%
System Board -5 V
300 rnA
+/-
5%
System Board
-12 V
300
rnA
+/-
5%
Plasma
Displav +5 V 60 rnA
+/-
10%
Plasma
Displav
+205 V
105 rnA
+/-
5V
1-13

File No. 960-010
1-14

File No. 960-010
2.1 GENERAL
The problem isolation procedures described in part 2 are
used to isolate defective FRUs (field replaceable units) .
The FRUs covered are:
1. Power supply unit
2. System board
3. FDD
4. HDD
5. Keyboard
6. Plasma display
Detailed replacement procedures instructions are described
in part 4 and test and diagnostics program operations are
described in part 3.
The following items are necessary for implementing the
problem isolation procedures.
1. T3100e diagnostics disk
2. Phillips head screwdriver
3. Blade head screwdriver
4. Tweezers
5. 2DD and 2HD formatted work disk (for FDD testing)
6. Cleaning disk kit (for FDD testing)
7. Multimeter
8. Printer port LED
The problem isolation flowchart described in section 2.2 can
be used to determine which isolation procedures are
necessary to isolate a T3100e problem.
2.2 PROBLEM ISOLATION FLOWCHART
The flowchart in figure 2-1 is used as a guide for
determining which FRU is defective. Please confirm the
followings before performing the flowchart procedures.
1. No disk is in the FDD.
2. All optional equipments are disconnected.
3. MS-DOS has been installed in drive C before a
trouble happens.
2-1

File No.
960-010
START
Turn the POWER switch on.
Wait 5 seconds or more.
Does the Power indicator
come on when the power is
turned on?
Yes
~ An error massage displayed 2
No
,j
~Does the "MEMORY TEST
XXXXKB" message display
?
Yes
/
Does the
"MEMORY TEST
XXXXKB"
message proceed
from 64KB to
1024KB ?
Yes
<IS the
C>
display on the
screen ?
~yes
No Perform power suppl
problem isolation
procedure in part
2.3.
Yes Perform system/
memory board proble
isolation procedures
in part
2 . 4 .
No Perform display
problem isolation
procedures
in part
2.8.
No
Perform system/
memory board problem
isolation procedures
in part
2.4.
No ....
Perform HDD problem
isolation procedures
in part
2. 6.
Figure 2-1 Problem Isolation Flowchart
2-2

Insert the diagnostics
isk into the FDD, then
File No. 960-010
ress the Ctrl + Alt and Del.
Is test and diagnostics
program being loaded ?
see PART 3
Yes
Is an error detected
when the diagnostics
disk ro ram is run?
No
No
erform FDD problem
isolation procedures
in section 2.5.
fter confirming
Yes hich diagnostics
~------~~est detected an
rror, perform the
elevant problem
isolation proce-
ures, as indicat-
d below.
Figure 2-1 Problem isolation flowchart (continued)
1. If an error is detected on the system test, memory
test, display test, or real timer test, perform the
system board isolation procedures in section 2.4.
2. If an error is detected on the hard disk test, perform
the HDD problem isolation procedures in section 2.6.
3. If an error is detected on the keyboard test, perform
the keyboard problem isolation procedures in section
2.7.
4. If an error is detected on the floppy disk test,
perform the FDD problem isolation procedures in section
2.5.
2-3

File No. 960-010
2.3 POWER SUPPLY UNIT PROBLEM ISOLATION PROCEDURES
WARNING: Dangerous high voltage is supplied to the power
supply unit. Pay enough attention on handling. It takes
few minutes after power off to discharge the electricity.
This section describes how to determine whether or not the
power supply unit is defective. Start with PROCEDURE 1 and
continue with other procedures as instructed. The
procedures described in this section are:
PROCEDURE 1: Power Indicator Check
PROCEDURE 2:
Connector Check
PROCEDURE 3:
Output Voltage Check
PROCEDURE 4:
Power Supply Unit Replacement
2-4

File No.
960-010
PROCEDURE 1
Power Indicator Check
1. Turn on the power.
2. If the power indicator lights, go to PROCEDURE 3.
If the indicator does not light, check the AC power
cord connection. One end of the AC power cord should be
inserted the standard AC wall outlet and the other end
should be connected to the AC IN jack on the back of
the system unit.
If OK, replace the AC power cord.
After replacing the AC power cord, if the indicator
lights, the original cord was probably defective. If
the indicator still doesn't light, go to PROCEDURE 2.
2-5

File No.
960-010
PROCEDURE 2
Connector Check
1. Turn off the power, then unplug the AC power cord.
2.
Remove the top cover. (Refer to section 4.8.)
3. Remove the power supply unit.
(Refer to section 4.9.)
4. If the power supply connector (PJ7) on the system board
is connected properly, go to PROCEDURE 3. If it is not
connected properly, reconnect it.
2-6