Panasonic Toughbook CF-48 Series User manual

- 1 -
ORDER NO. CPD0010002C0
CF-48
Notebook Computer
© 2000 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.
Model Number Reference
This is the Service Manual for
the following areas.
M ...for U.S.A. and Canada
E ...for U.K.
G ...for Germany
F ...for France
S ...for Sweden
T ...for Italy
P ...for Spain
The models in the CF-48 series are numbered in accordance with the types of the CPU, LCD
and HDD etc. featured by the product.
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain
warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity
should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in
this service information by anyone else could result in serious injury or death.
Model No.CF-48 A
LCD type
3: for 13.3" TFT Color
4: for 14.1" TFT Color
HDD type / RAM size
A: 10 GB / 64 MB
F: 20 GB / 128 MB
Area
M: for U.S.A. and Canada
E: for U.K.
G: for Germany
F: for France
S: for Sweden
T: for Italy
Drive
A: FloppyDisk drive / CD-ROM drive
B: FloppyDisk drive / DVD-ROM drive
CPU type
M: for Intel Mobile Pentium III
Processor 600 MHz
N: for Intel Mobile Pentium III
Processor 700 MHz


Operating System
C: Microsoft Windows NT
D: Microsoft Windows 2000
E: Microsoft Windows 98





- 2 -
WARNINGS
For U.K.
FOR YOUR SAFETY PLEASE READ THE FOLLOWING TEXT CAREFULLY
This appliance is supplied with a moulded three pin mains plug for your safety and convenience.
A 3 amp fuse is fitted in this plug.
Should the fuse need to be replaced please ensure that the replacement fuse has a rating of 3
amps and that it is approved by ASTA or BSI to BS 1362.
Check for the ASTA mark or the BSI mark on the body of the fuse.
If the plug contains a removable fuse cover you must ensure that it is refitted when the fuse is
replaced.
If you lose the fuse cover the plug must not be used until a replacement cover is obtained.
A replacement fuse cover can be purchased from your local Panasonic Dealer.
IF THE FITTED MOULDED PLUG IS UNSUITABLE FOR THE SOCKET OUTLET IN YOUR
HOME THEN THE FUSE SHOULD BE REMOVED AND THE PLUG CUT OFF AND DISPOSED
OF SAFELY.
THERE IS A DANGER OF SEVERE ELECTRICAL SHOCK IF THE CUT OFF PLUG IS INSERTED
INTO ANY 13 AMP SOCKET.
If a new plug is to be fitted please observe the wiring code as shown below.
If in any doubt please consult a qualified electrician.
Important
The wires in this mains lead are coloured in accordance with the following code:
Blue: Neutral
Brown: Live
As the colours of the wires in the mains lead of this apparatus may not correspond with the
coloured markings identifying the terminals in your plug, proceed as follows:
The wire which is coloured Blue must be connected to the terminal which is marked with
the letter N or coloured BLACK.
The wire which is coloured Brown must be connected to the terminal which is marked
with the letter L or coloured RED.
Under no circumstances should either of these wires be connected to the earth terminal of the
three pin plug, marked with the letter E or the Earth Symbol .
The mains plug on this equipment must be used to disconnect the mains power.
Please ensure that a socket outlet is available near the equipment and shall be easily
accessible.
How to replace the fuse
Open the fuse compartment with a screw
driver and replace the fuse.
Warnings
This equipment is not designed for connection to an IT power system.
(An IT system is a system having no direct connections between live parts and Earth; the exposed
conducive parts of the electrical installation are earthed.
An IT system is not permitted where the computer is directly connected to public supply systems in the
U.K.)
Disconnect the mains plug from the supply socket when the computer is not in use.
This equipment is produced to BS800/1983.
A S A

- 3 -
LASER SAFETY INFORMATION
For U.S.A.
Class 1 LASER-Product
This product is certified to comply with DHHS Rules 21 CFR Subchapter J.
This product complies with European Standard EN60825 (or IEC Publication 825)
For all areas
This equipment is classified as a class 1 level LASER product and there is no hazardous LASER radiation.
Caution:
(1) Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
(2) The drive is designed to be incorporated into a computer-based system or unit which has an enclosing cover.
It should never be used as a stand alone drive.
Danger:
The serviceman should not remove the cover of drive unit and should not service because the drive unit is a non-
serviceable part.
Please check DANGER label on PD-drive unit.
• Unplug the AC power cord to the equipment before opening the top cover of the drive.
• When the power switch it on, do not place your eyes close to the front panel door to look into the interior of the unit.
LASER Specification
Class 1 level LASER Product
Wave Length: DVD 658±8 nm
CD 775~815 nm
Laser safety information is appropriate only when drive with laser is installed.
• CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the equipment manufacture.
Discard used batteries according to the manufacturer's instructions.
Vorsicht!
Explosionsgefahr bei unsachgemäßem Austausch der Batterie. Ersatz nur durch denselben order einen vom
Hersteller empfohlenen ähnlichen Typ. Entsorgung gebrauchter Batterien nach Angaben des Herstellers.
LITHIUMBATTERIES
ATTENTION: IL Y A DANGER D'EXPLOSION S' IL Y A REMPLACEMENT INCORRECT DE LA PILE.
REMPLACER UNIQUEMENT AVEC UNE PILE DU MÈME TYPE OU D'UN TYPE RECOMMANDÉ PAR LE
CONSTRUCTEUR. METTRE AU RÉBUT LES PILES USAGÉES CONFORMÉMENT AUX INSTRUCTIONS DU
FABRICANT.
PILE AU LITHIUM
LITHIUM BATTERY

- 4 -
CONTENTS
1. Specificayions .......................................................................................................... 1-1~1-2
2. Names and Functions of Parts ............................................................................... 2-1, 2-2
3. Technical Information .............................................................................................. 3-1~3-4
3.1 System Overview .................................................................................................................. 3-1, 3-2
3.2 System Memory Map ............................................................................................................ 3-3
3.3 I/O Address Map ...................................................................................................................3-4
4. Diagnosis Procedure ............................................................................................... 4-1~4-12
4.1 Basic Procedures .................................................................................................................. 4-1
4.2 Power On Self Test ................................................................................................................4-2
4.3 List of Error Codes ................................................................................................................ 4-3, 4-4
4.4 Diagnosis Map ...................................................................................................................... 4-5~4-12
5. Diagnosis Test .......................................................................................................... 5-1~5-16
5.1 Diagnostic Test Procedure .................................................................................................... 5-1~5-10
5.2 Error Message ...................................................................................................................... 5-11~5-16
6. Disassembly/Reassembly ....................................................................................... 6-1~
6.1 Removing the Battery Park ................................................................................................... 6-1
6.2 Removing the HDD Unit ........................................................................................................ 6-1
6.3 Removing the RAM Cord and the RTC Battery ..................................................................... 6-2
6.4 Removing the MINI-PCI Modem Card................................................................................... 6-2
6.5 Removing the CD-ROM Drive ............................................................................................... 6-2
6.6 Removing the Center Cover.................................................................................................. 6-3
6.7 Removing the Keyboard ........................................................................................................ 6-3
6.8 Removing the Top Shild Plate ............................................................................................... 6-4
6.9 Removing the LCD Unit ........................................................................................................ 6-4
6.10 Removing the SuperDisk Drive or the FloppyDisk Drive ....................................................... 6-4
6.11 Removing the Top Cabinet and Sub PCB Angle ...................................................................6-5
6.12 Removing the IF PCB ........................................................................................................... 6-5
6.13 Removing the LED PCB, MAIN PCB, VGA/CPU Heat Sink, Fan,
I/O Plate and COM PCB ....................................................................................................... 6-6
6.14 Removing the LCD ................................................................................................................ 6-7
6.15 Removing the PAD PCB ........................................................................................................ 6-8
6.16 Removing the Speaker .......................................................................................................... 6-8
6.17 Removing the IC Card Cover and the Port Replicator Cover ................................................6-9
6.18 Removing the HDD ............................................................................................................... 6-9
6.19 Removing the FDD................................................................................................................ 6-9
6.20 Removing the CD-ROM Drive or the DVD-ROM Drive ..........................................................6-9
7. Wiring Connection Diagram ................................................................................... 7-1
8. Exploded Views ........................................................................................................ 8-1~8-4
9. Replacement Parts List ........................................................................................... 9-1~9-12

1 - 1
1. Specifications
Main Specifications
*
1
A 16 M color display is achieved by using the dithering function.
*
2
1GB = 10
9
bytes
This page provides the specifications for the model CF-48xxxxAxx. The model number will change depending
on the configuration of the unit, such as, CPU speed, memory size, HDD size, Operating System, LCD type, and
whether a CD-ROM drive, a SuperDisk drive, a DVD-ROM drive, or a LAN card is included or not.
To check the model number:
Check the bottom of the computer or the box the computer came in at the time of purchase.
To check CPU speed:
Use DMI Viewer in [Start] - [Programs] - [Panasonic] - [DMI Viewer].
To check memory and the Hard Disk Drive (HDD) size:
Access the HDD’s “Properties” to check its capacity.
1. Run the Setup Utility.
2. The memory size is confirmed in [System Memory] of the [Main] menu. The hard disk drive size is confirmed in
[Primary Master] of the [Main] menu.
Model No.
CPU
Memory (Expandable to)
Video Memory
LCD Type
Displayed Colors*
1
Hard Disk Drive
Operating System
CF-48xxxxAxx
Mobile Pentium® III Processor
600 MHz featuring Intel® SpeedStepTM Technology (CF-48Mxxxxxx)
700 MHz featuring Intel® SpeedStepTM Technology (CF-48Nxxxxxx)
L1 Cache Memory: 32 KB
L2 (Second) Cache Memory: 256 KB
64
128MB (384 MB Max.) (for CF-48xxFxxxx)
14.1" type (TFT) (for CF-48x4xxxxx)
20 GB*2(for CF-48xxFxxxx)
MB (320 MB Max.) (for CF-48xxAxxxx)
8 MB
13.3 type (TFT) (for CF-48x3xxxxx)
256/65536/16M colors (640 x 480 dots/800 x 600 dots/1024x768 dots)
10 GB*2(for CF-48xxAxxxx)
Microsoft
Microsoft® Windows® 2000 (CF-48xxxxxDx)
Microsoft® Windows NT®(CF-48xxxxxCx)
®Windows®98 Second Edition (for CF-48xxxxxEx)

1 - 2
*
1
Only a RAM card designed for PC100 can be added.
*
2
Use only a monaural condenser microphone.
*
3
Varies depending on the usage conditions.
*
5
The AC adaptor is compatible with power sources up to 240 V AC adaptor.
This computer is supplied with a 125 V AC compatible AC cord.
*
6
Approx. 1.5 W when the battery pack is fully charged (or not being charged) and the computer is OFF.
Approx. 3.5 W when the [Wake up from LAN] has been enabled (Model with both an internal modem and an internal LAN port).
*
7
Rated power consumption.
*
8
Consecutive disk access of the SuperDisk drive between 30˚C and 35˚C {86 ˚F and 95 ˚F} for 15 minutes or more may damage the da ta on
the disk.
<Model with both an internal modem and internal LAN port>
Keyboard
Floppy Disk Drive
CD-ROM Drive
DVD-ROM Drive
Slots
Interface
Pointing Device
Speaker
Utility Programs
Sound
Battery Pack
Battery
Clock Battery
AC adaptor*
5
Power Consumption*
6
Environment
Physical Dimensions (W X H X D)
Weight
87 keys for European market
88 keys for US market
720 KB/1.44 MB (two-mode)
for CF-48xxxBxxx
for CF-48xxxAxxx
PC Card Slots Two Type I or Type II, or one Type III
Allowable current 3.3 V: 400 mA, 5 V: 400 mA
(total for two slots)
RAM Module Slot*
1
144-pin, 3.3-V, SO-DIMM, SDRAM, PC100 Compliant
Parallel Port Dsub 25-pin female
External Display Port Mini Dsub 15-pin female
Serial Port Dsub 9-pin male
Microphone Jack*
2
Miniature jack, 3.5 DIA
Headphone Jack Miniature jack, 3.5 DIA
Impedance 32 W , Output Power 4 mW x 2
External Keyboard/Mouse Port Mini DIN 6-pin female
Expansion Bus Connector Dedicated 100-pin female
USB Port 4-pin x 2
Internal Modem Data: 56 kbps(V.90 & K56flex) FAX:14.4 kbps
Touch Pad
Stereo Speaker (built in)
Setup Utility, DMI Viewer
HRTF 3D positional audio support 16-bit stereo, WAVE and MIDI playback
Li-ion 11.1 V, 5.4 Ah
Operating Time*
3
Approx. 2.0 hours - 5.0 hours
Charging Time*
3
Power On Approx. 5.5 hours
Power Off Approx. 3.0 hours
Coin type lithium battery 3.0 V
Input 100 V - 240 V AC, 50 Hz/60 Hz Output 15.6 V DC, 3.85 A
Approx. 45 W*
7
/ Approx. 70 W (maximum when recharging in the ON state)
In use Temperature 5 ˚C to 35 ˚C*
8
{41 ˚F to 95 ˚F}
Humidity 30% to 80% RH (No condensation)
Not in use Temperature -20 ˚C to 60 ˚C {-4 ˚F to 140 ˚F}
Humidity 30% to 90% RH (No condensation)
307 mm X 45 mm X 260 mm {12.1 " X1.8 " X 10.2 "}
Approx. 3.4 kg {Approx. 7.4 lb.}
Other Specifications
Internal LAN IEEE 802.3 10Base-T
IEEE 802.3u 100Base-TX
Interface

2 - 1
2. Names and Functions of Parts
For information on the key combi-
nations available.
Before using the computer for the first time,
carefully read the [Limited Use License
Agreement]. If you agree to the conditions,
remove the seal.
A Kensington cable can be con-
nected to prevent theft of your
computer. For more informa-
tion, please read the manual that
comes with the cable.
To adjust the volume
*2
, select the on the task
bar, then [Volume Control].
*2
You may also use the function keys to perform this operation
(Fn + F5 or F6 ).
Speaker on/off : Fn + F4
Power status
Battery pack status
Use this connector to connect
headphones or amplifier-equipped
speakers. Audio output from the
internal speaker is disabled when
headphones or external speakers
are connected.
Use only a monaural condenser microphone.
Using an input source other than a monaural
condenser microphone may not allow audio to
be input or may damage the equipment.
The illustrations shown may differ from the actual physical appearances.
or
Caps Lock
Numeric key (NumLk)
Scroll lock (ScrLk)
CD-ROM/DVD-ROM status
Floppy disk/SuperDisk status
Hard disk status
Power status
LOCK
or
*1
SuperDisk
TM
and SuperDisk logo are trademarks of
Imation Corp.
Speakers
LED Indicators
Security Lock
Function Keys
LCD
Floppy Disk Drive
SuperDisk
TM
Drive
*1
Power Switch
Headphone Jack
Microphone Jack
CD-ROM Drive
PC Card Slots
LED Indicators
Touch Pad
DVD-ROM Drive

2 - 2
These holes allow heat to exit.
CAUTION
Do not block or place the computer in a loca-
tion that may prevent proper ventilation.
External Display Port
Parallel Port
External Keyboard/Mouse Port
USB Port
Serial Port
Ventilation Hole
RAM Module Slot
Expansion Bus Connector
Internal Modem
or
Internal Modem & LAN Port
Battery Pack
DC-IN Jack
This cover is not to be opened by anyone
except authorized service personnel.
CAUTION

3 - 1
3.Technical Information
3.1 System Overview
3.1.1 System Configuration
The main system is made up of a Main board, a SUB board, a Jack board, a LED board, a IF s itch board,
a PAD board and a COM board.
The po er circuit has voltage for individual 1.6V/2.5V/3.3V/5V/12V.
It also supports both mixed-voltage LSIs at 3.3V/5V and single-voltage LSIs at 3.3V.
The CPU operates at 1.6V, 1.35V(core)/2.5V; the main memory at 3.3V; the core logic at 3.3V/5V; and the
other main chips at 3.3V.
3.1.2 Power Supply System
The po er supply used by the Main board is generated on the Main board based on the voltage from the AC adapter.
Po er is supplied to the AC adapter and battery pack in that order hen the RTC po er is off or is in
suspend mode. When neither po er supply can be accessed, po er is supplied from the clock battery
(RTC battery).
Bloc Diagrams
Power Supply Configuration Diagram
Power Supply System Description On mode Suspend
mode Off/Hiber nation
VC system (VC5, VC3, VC25, VC16, VC15) CPU and logic power supply ON OFF OFF
VB system (VB5, VB3) Logic power supply ON ON OFF
VA system (VA3) PMC power supply ON ON ON
VPP system (VPP) 12V power supply, for the card slot ON OFF OFF
Table 1: Description of Power Supply Systems
Li-Ion BATTERY
11.1V
5400mAh
AC ADAPTOR 15.6V
BATTERY
CHARGER
DC/DC
CONVERTER
OUTPUT 5V
VOLTAGE
DETECTOR
AC IN*
DC/DC
CONVERTER
OUTPUT
1.6V /1.35V
DC/DC
CONVERTER
OUTPUT 3.3V
IC44
AC ON
OVERVOL
VOLTAGE
DETECTOR
VOLTAGE
REGULATOR
OUTPUT12V
VOLTAGE
DETECTOR
VOLTAGE
DETECTOR
SUSB*
SUSB*
SUSB
SUSC*
OVERVOL
ACVOK
OVERVOL
OVERVOL
VOLTAGE
REGULATOR
OUTPUT 1.5V
IC58
IC58
IC57
SUSB
IC43
VD12ON
IC46
IC16
VA3
VC1
VB3
VC3
VD12
SYSPW
VC5
VM1
VB5
AC15
VCT
VGA_CORE
VOLTAGE
REGULATOR
OUTPUT 2.5V
Q70
Q62
Q72

3 - 2
int
intint l
ll
e
ee
443BX
443BX443BX
Extension Memory
Extension MemoryExtension Memory
Extension Memory
(SDRAM)
(SDRAM)(SDRAM)
(SDRAM)
256MB
256MB256MB
256MB
PCI ISA
Bridge
PIIX4M
PIIX4MPIIX4M
PIIX4M
INTEL
IDE
Interface
USB
Interface
HDD
20/10GB
2.5 inch
CD-ROM
DRIVE
X24max
Primary
USB
DEVICES
Secondary
PCMCIA
PCMCIAPCMCIA
PCMCIA
RB5C478
RICOH
RICOHRICOH
RICOH
BIOS
BIOSBIOS
BIOS
FlashROM
512KB
SOUND
SOUNDSOUND
SOUND
ES1988 ESS
KBC
KBCKBC
KBC Embedded
EmbeddedEmbedded
Embedded
Controller
ControllerController
Controller
32bit PCI Bus
16/8bit ISA/EIO Bus
MODEM
MODEMMODEM
MODEM
or
oror
or
COMBO
COMBOCOMBO
COMBO
Ext. MIC
Speaker
Int. KB
Flat PAD
PS/2 Port
Li-Ion
Battery Pack
TYPE II(SLOT A)
TYPE II(SLOT B)
Super I/O
Super I/OSuper I/O
Super I/O
PC97338
NS
FDD
Serial
Parallel
Main Memory(SDRAM)
Main Memory(SDRAM)Main Memory(SDRAM)
Main Memory(SDRAM)!
!!
! 64M/128MB
64M/128MB64M/128MB
64M/128MB
1.5V (GTL)
3.3V
3.3V
RJ11
Connecter
MiniPCI
64bit Host Bus
Super
Disk
Drive
Headphone
LCD
14.1”/13.3”
CRT
Rage Mobility M1
Rage Mobility M1Rage Mobility M1
Rage Mobility M1
ATI
ATIATI
ATI
VRAM
8.0MB
VGA
VGAVGA
VGA AGP Bus
Portreplicator
or
RJ45
Connecter
Mobile Pentium III
w
ww
w
wi
iii
it
tt
t
th
hh
h
h
Intel
®
SpeedSt ep
TM
Technology
int l
e
~
16/8bit ISA/EIO Bus
Host PCI
Bridge
443BX
INTEL
DRAM
Interface
II
System Configuration Diagram

3 - 3
3.2 System Memory Map

3 - 4
I/O Address Map (CF-48)
Address Function IC No
,
x0000 - x000F Direct memor
y
access controller
x0010 - x0018 Motherboard resources
x001F - x001F Motherboard resources
x0020 - x0021 Pro
g
rammable interrupt controller
x0022 - x0022 Motherboard resources
x0024 - x0025 Motherboard resources
x0028 - x0029 Motherboard resources
x002C - x002D Motherboard resources
x0030 - x0031 Motherboard resources
x0034 - x0035 Motherboard resources
x0038 - x0039 Motherboard resources
x003C - x003D Motherboard resources
x0040 - x0043 S
y
stem time
r
x0050 - x0052 Motherboard resources
x0060 - x0060 Standard 101/102-Ke
y
or Microsoft Natural Ke
y
board
x0061 - x0061 S
y
stem speaker
x0062 - x0062 Motherboard resources
x0064 - x0064 Standard 101/102-Ke
y
or Microsoft Natural Ke
y
board
x0066 - x0066 Motherboard resources
x0070 - x0071 S
y
stem CMOS/real time clock
x0072 - x0077 Motherboard resources
x0080 - x0080 Motherboard resources
x0081 - x008F Direct memor
y
access controller
x0090 - x009F Motherboard resources
x00A0 - x00A1 Pro
g
rammable interrupt controller
x00A4 - x00A5 Motherboard resources
x00A8 - x00A9 Motherboard resources
x00AC - x00AD Motherboard resources
x00B0 - x00BD Motherboard resources
x00C0 - x00DF Direct memor
y
access controller
x00F0 - x00FF Numeric data processor
x0170 - x0177 Intel 82371AB/EB PCI Bus Master IDE Controller
x0170 - x0177 Secondar
y
IDE controller
(
dual fifo
)
x01B0 - x01B1 Motherboard resources
x01F0 - x01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
x01F0 - x01F7 Primar
y
IDE controller
(
dual fifo
)
x0376 - x0376 Intel 82371AB/EB PCI Bus Master IDE Controller
x0376 - x0376 Secondar
y
IDE controller
(
dual fifo
)
x0378 - x037F ECP Printer Port
(
LPT1
)
x0398 - x0399 Motherboard resources
x03B0 - x03BB RAGE MOBILITY AGP
(
En
g
lish
)
x03C0 - x03DF RAGE MOBILITY AGP
(
En
g
lish
)
x03F0 - x03F5 Standard Flopp
y
Disk Controller
x03F6 - x03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
x03F6 - x03F6 Primar
y
IDE controller
(
dual fifo
)
x03F7 - x03F7 Standard Flopp
y
Disk Controller
x03F8 - x03FF Communications Port
(
COM1
)
x04D0 - x04D1 Motherboard resources
x0778 - x077F ECP Printer Port
(
LPT1
)
x0CF8 - x0CFF PCI bus
x1000 - x103F Motherboard resources
x1040 - x104F Motherboard resources
x1050 - x1057 Primar
y
IDE controller
(
dual fifo
)
x1050 - x105F Intel 82371AB/EB PCI Bus Master IDE Controller
x1058 - x105F Secondar
y
IDE controller
(
dual fifo
)
x1060 - x1067 Lucent Win Modem
x1400 - x14FF ESS Alle
g
ro PCI Audio
(
WDM
)
x1800 - x18FF Lucent Win Modem
x2000 - x20FF RAGE MOBILITY AGP
(
En
g
lish
)
x2000 - x2FFF Intel 82443BX Pentium
(
r
)
II Processor to AGP controlle
r
xFE00 - xFE01 Motherboard resources

4 - 1
4. Diagnosis Procedure
4.1. Basic Procedures
The basic procedures for diagnosis, disassembly, and test of defective parts of a set to be repaired are summarized below. For
details, refer to relevant pages in the Service Manual.
ll
ll
l Flow Chart
Power On Self Test
OCCURRENCE OF
TROUBLE
Automatic diagnosis takes
place when the power switch
is set to ON.
Power sw is set to ON.
POST NORMAL
FINISH POST ERROR
OCCURRENCE
DEFECTIVE PARTS
SORTING
SELF-DIAGNOSIS TEST (IF REQUIRED)
Conduct a self diagnosis test when
it is necessary for conduct
trouble diagnosis.
TROUBLESHOOTING
Defective parts are sorted by
referring to symptoms.
SELF-DIAGNOSIS TEST
After repair, conduct a self-
diagnosis test and make sure that the
repaired set operates properly.
DISASSEMBLY PROCEDURE
Replace defective parts.
REPAIR WORK
INSPECTION
TEST FAILED
TEST OK
END OF
REPAIR WORK

4 - 2
4.2. Power-On Self Test (Boot Check)
4.2.1. Outline of POST
The set has a boot check function called POST (Power-On Self Test) in it. The condition of the main body is diagnosed by checking
beep sound or error code.
lStart .............Test begins automatically when power switch is set to ON.
lNormal finish .....After memory checking, a beep sound is issued once and the set is placed into automatic stop.
Note: If no error occurs, nothing is displayed. (No display of OK, etc.)
4.2.2. Error Diagnosis by Checking Beep Signal Sound
The beep sound is as follows:
= long sound (about 0.4 sec.), = short sound (about 0.2 sec.), Length between sounds is about 0.1 sec.
lTable of errors classified by beep sounds
(1 (long sound) -2-3-4)
(Length of bar shows length of sound.)
Diagnosis Beep signal sound Error message
1(long sound)-2 BIOS ROM error
BIOS ROM error
RAM error
Keyboard controller error
RAM error
RAM error
RAM error
1-2-2-3
1-3-1-1
1-3-1-3
1-3-4-1
1-3-4-3
1-4-1-1
BIOS ROM error2-1-2-3
Occurrence of unexpected offering2-2-3-1
Main board
(Note) A beep sound is also issued in case of other I/O trouble.

4 - 3
4.3. List of Error Codes

4 - 4

4 - 5
4.4. Diagnosis Map
4.4.1. MAIN UNIT DIAGNOSIS (1/2)
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No. Symptom Troubleshooting
procedures
Source of
problem Component
No.
Result
1No power is sent to the
unit.
(when using AC)
YES Go to No. 1-6
NO Go to No. 1-2
Is voltage pin 4 of Q70 lower
than 1V?
YES
If voltage pin 3 of
D24 is 15V
Q70
NO
R415
Q69
If lower than 15V D24
1-4
Is voltage pin 4 of Q62 lower
than 1V?
YES
If voltage pin 3 of
D24 is 15V
Q62
NO
Q61
If lower than 15V D28, D29
D30, D31
1-5
1-1 Is 15V applied to pins 5-8 of
Q74? (Whichever one)?
YES Go to No. 1-5
NO Go to No. 1-3
1-2 Is 15V applied to pins 1 of
Q74?
YES Go to No. 1-4
If lower than 1 D26
NO
If resistance
across L93
terminals is not
lower than 1
L211-3 Is 15V applied to pins 1 of
Q70?
No power is sent to the
unit, (When using the
Battery Pack)
Power cuts off during
operation.
YES
If voltage is 0V
during the power
switch is set to
ON, go to No. 1-7
Final Means
Is 8~12V applied to pins 5~8
of Q62? (Whichever one)
Main PCB IC58
YES
If they show
soldered
completely
R389, R390
R403, R404
1-7
1-8
Check soldered parts of
R389, 390, 403 and R404.
NO
2-1
IC58YES
1-6
Before setting the power
switch to ON, check voltage
on either side of R260. Is
Voltage 3.3V?
If not 0V
NO
If voltage of C454
is 3.3V
If lower than 3V
Go to No. 1-6
IC58
NO Go to No. 1-5
R260
SW801
2
4.4.2 MAIN UNIT DIAGNOSIS (2/2)
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
Component
Source of
problem
No. Symptom Troubleshooting
procedures
No.
Result
1 YES Go to No. 1-2
1-1 Are there system files in the
device selected?
When a device is selected
for “Boot Up Drive”, the
system boots from a
different device.
NO Improper setting
YES
Device for which
the problem
occurred
1-2
Does the unit operate
normally after replacing the
problem device.
(HDD)
IC13
(FDD/SDD)
IC13
IC23
NO Main PCB

4 - 6
Component
Source of
problem
No. Symptom Troubleshooting
procedures
No.
Result
Main PCB
IC13
X2
RTC battery
2
2-1 Replace the Main PCB.
Date or Time cannot be
input.
Date and Time does not
change properly.
Date and Time are not
displayed.
Main PCB IC5 12
IC3
33-1 Replace the Main PCB.
Memory count is too large
or too small.
YES
NO
Software setting
Go to No. 4-2
YES
NO
Speakers
Go to No. 4-3
44-1
4-2
Check software setting.
Replace the Speakers.
Does operation return to
normal?
Main PCB IC30
IC33
4-3 Replace the Main PCB.
No Sound
Volume does not work.
12
NO
11
ConfigurationCheck configuration.
5-1
5Default configuration in
use
Main PCB IC136-1
6 Interrupt controller failure
Main PCB7-17 Timer failure
Go to No. 8-2
Does the system return to
normal if the expansion card
is removed?
YES
Main PCBNO IC13
IC3
8-1
8Expansion card RAM
checksum error
Expansion card
Replace the expansion card.
Does operation return to
normal?
YES
Main PCBNO
8-2
Main PCB IC139-1
9 Real Time Clock failure
Error during
SETUP
Battery
Main PCB
Does resetting through
SETUP correct the problem?
Replace the battery.
Does operation return to
normal?
YES
YES
NO
RTC battery
IC13
10-1
10-2
10 Dead RTC Battery
Go to No. 10-2NO
ConfigurationCheck configuration.11-1Configuration error
Go to No. 12-2
Were the correct settings
selected during SETUP?
YES
Go to No. 12-4
12-1
CMOS Checksum error
FDD
Replace the FDD.
Does operation return to
normal?
YES
Go to No. 12-3NO
12-2
HDD
Replace the HDD.
Does operation return to
normal?
YES
Go to No. 12-4NO
12-3
Error during
SETUP
Does resetting through
SETUP correct the problem?
YES
Main PCBNO IC13
X2
12-4

4 - 7
15 PCI failur Go to No. 15-2
Does the system return to
normal if the expansion card
is removed?
YES
Main PCBNO IC3
15-1
Expansion card
Replace the expansion card.
Does operation return to
normal?
YES
Main PCBNO IC3
15-2
Component
Source of
problem
No. Symptom Troubleshooting
procedures
No.
Result
13 Does resetting the date/time
in SETUP correct the
problem?
13-1
Real time Clock is not
updating
Error during
SETUP
YES
Main PCBNO IC13
14 Replace the expansion RAM
card.
Does operation return to
normal? (Go to “NO”if not
connected.)
14-1
Memory size/data error Expansion RAM
card
YES
Main PCBNO IC3
IC5 12
4.4.3 LCD DIANOSIS
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
Component
Source of
problem
No. Symptom Troubleshooting
procedures
No.
Result
1YES Brigntness
adjustment
1-1
Does the LCD display
properly after brightness
level is adjusted?
No picture appears on the
screen.
Brigntness
adjustment
2
2-1
Does the LCD display
properly after brightness
level is adjusted?
Display is too dark or too
bright.
LCD
Go to No. 3-2
3
3-1
Replace the LCD.
Does operation return to
normal.
Part of the screen does
not display properly.
Display quality poor.
(Fuzzy or slanted, etc.)
NO
YES
NO
Go to No. 1-2
Go to No. 2-2
CN16
IC52
LCD
2-2
Replace the LCD.
Does operation return to
normal?
2-3
Replace the Main PCB.
Does operation return to
normal?
YES
NO
YES
NO
Main PCB
LCD cable
IC14
YES
NO
Inverter PCB
Go to No. 4-2
4
4-1
Replace the Inverter PCB.
Does operation returnt o
normal?
Backlight does not turn on. YES
NO
Main PCB
LCD cable
IC14
3-2
Replace the Main PCB.
Does operation return to
normal?
YES
NO
Go to No. 2-3
Main PCBYES
NO LCD cable
YES LCD
1-2
Replace the LCD.
Does operation return to
normal?
1-3
Replace the Main PCB.
Does operation return to
normal?
NO Go to No. 1-3
Inverter cable
Go to No. 4-3
4-2
Replace the Inverter cable.
Does operation return to
normal?
YES
NO
Backlight
Main PCB CN16
IC52
4-3
Replace the backlight.
Does operation return to
normal?
YES
NO

4 - 8
4.4.4 KEYBOARD, MOUSE or TOUCH PAD DIAGNOSIS
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
NO
No. Symptom Troubleshooting
procedures
Source of
problem
No.
Result
1
Keyboard1-1 Keyboard is broken.
Key top cannot be
pressed.
Key top does not spring
back after pressing.
2
2-1
Replace the keyboard and
see if inputting from the
keyboard function normally?
None of the keys function.
Certain keys do not
function.
Component
YES
NO
Keyboard
Main PCB
3 3-1 Does the screen mode
correspond to the key entry
mode?
Input character is
displayed as grabage.
YES Go to No. 3-2
4Mouse does not function.
Inputs from the mouse are
not accepted properly.
5Touch pad not function.
Input from the track ball
are not accepted properly.
4-1
Replace the mouse.
Does operation return to
normal?
YES
NO
Mouse
Main PCB IC26
5-1
Replace the touch pad.
Does operation return to
normal?
YES Touch Pad
Go to No. 5-2
5-2
Replace the touch pad FPC.
Does operation return to
normal?
YES
NO
Touch Pad FPC
Main PCB IC26
3-2
Is the keyboard setting in the
operating system correct?
NO Operating
mistake
3-3
Replace the keyboard and
see if inputting from the
keyboard functions normally.
YES
NO
Keyboard
Main PCB IC26
YES Go to No. 3-3
NO Software setting
KeyboardYES
Replace the keyboard.
Does operation return to
normal?
Keyboard interface failure
7-1 Main PCBNO IC26
7
6Go to No. 7
Is the keyboard properly
connected?
YES
Keyboard was
not connected
properly
NO
6-1
Keyboard failure