Panasonic CF-72X3UUBDM - Toughbook 72 - Pentium 4-M 1.8... User manual

- 1 -
ORDER NO. CPD0010001C0
CF-72
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-72 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-72 Z
LCD type
3: for 13.3" TFT Color
HDD type / RAM size
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
B: CD-ROM drive
C: CD-ROM drive / SuperDisk drive
CPU type
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

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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.
• 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 : CD 790+25, -15 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. Specifications ....................................................................................................................... 1-1, 1-2
2. Name 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 ........................................................................................................... 4-1~4-15
4.1. Basic Procedures ................................................................................................................ 4-1
4.2. Power-On Self Test (Boot Check) ........................................................................................ 4-2
4.3. List of Error Codes .............................................................................................................. 4-3, 4-4
4.4. Diagnosis Map..................................................................................................................... 4-5~4-13
5. Diagnostic Test ..................................................................................................................... 5-1~5-15
5.1. Diagnostic Test Procedure .......................................................................................................... 5-1~5-9
5.2. Error Message ............................................................................................................................ 5-10~5-15
6. Disassembly/Reassembly ................................................................................................... 6-1~6-8
6.1. Removing the Battery Pack ........................................................................................................ 6-1
6.2. Removing the HDD Unit ............................................................................................................. 6-1
6.3. Removing the Palmrest Unit, the PAD PCB and the Touch Pad ................................................ 6-1
6.4. Removing the RAM Card ............................................................................................................ 6-2
6.5. Removing the Keyboard ............................................................................................................. 6-2
6.6. Removing the LCD Section and the Center Cover ..................................................................... 6-3
6.7. Removing the LCD Section and the LED PCB .......................................................................... 6-4
6.8. Removing the PCB Case Unit .................................................................................................... 6-4
6.9. Removing the Bottom Case Unit and the Handle Unit ............................................................... 6-4
6.10. Removing the CD-ROM Drive .................................................................................................. 6-4
6.11. Removing the Main PCB .......................................................................................................... 6-5
6.12. Removing the Fan and the Fan Heat Angle ............................................................................. 6-5
6.13. Removing the Sub PCB ............................................................................................................ 6-6
6.14. Removing the LID PCB............................................................................................................. 6-6
6.15. Removing the Bus Shutter Unit and the Card Shutter Unit ...................................................... 6-6
6.16. Removing the PCMCIA CN (PC Card Slot) and RTC Battery ................................................. 6-6
6.17. Removing the LCD Unit and the Inverter PCB ......................................................................... 6-7
6.18. Removing the LCD Lock and the LCD Lock Spring ................................................................. 6-8
6.19. Setting the Dip SW (SW1) ........................................................................................................ 6-8
7. Wiring Connection Diagram ................................................................................................ 7-1
8. Exploded Views .................................................................................................................... 8-1~8-5
9. Replacement Parts List ....................................................................................................... 9-1~9-15
9.1. CF-72 .......................................................................................................................................... 9-1~9-13
9.2. CD-ROM Drive CF-VCD711 ....................................................................................................... 9-14
9.3. SupperDisk Drive CF-VFS712W ................................................................................................ 9-15

1 - 1
1. Specifications
Model No. CF-72N3FxZxx
CPU Mobile Pentium® III Processor
700 MHz featuring Intel®
SpeedStepTM Technology
L1 Cache Memory: 32 KB
L2 (Second) Cache Memory: 256 KB
Memory (Expandable to) 128 MB (384 MB Max. )
Video Memory 8 MB
LCD Type 13.3 type (TFT)
Displayed Colors*1256/65536/16M colors (640 x 480 dots/800 x 600 dots/1024x768 dots)
Hard Disk Drive 20 GB *2
Operating System Microsoft®Windows®98 Second Edition (for CF-72xxxxxEX)
Microsoft®Windows®2000 (for CF-72xxxxxDx)
Microsoft®Windows®NT (for CF-72xxxxxCx)
Main Specifications
*
1
A 16M color display is achieved by using the dithering function.
*
2
1GB = 10
9
bytes
This page provides the specifications for the basic model CF-72N3FxZxx. The model number will change depending on the
configuration of the unit, such as, CPU speed, memory size, HDD size and Operating System.
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 size and hard disk drive (HDD) size:
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.

1 - 2
Keyboard 87 keys
SuperDisk Drive 720 KB /1.44 MB /120 MB (for CF 72xxxCxxx)
CD-ROM Drive 24X speed (Max.)
PC Card Slots Two Type I or Type II , or one Type III
Slots Allowable current 3.3 V : 400 mA , 5 V : 400 mA ,
(total for two slots)
RAM Module Slot*1144-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*2Miniature jack, 3.5 DIA
Interface Headphone Jack Miniature jack, 3.5 DIA
Impedance 32 Ω, Output Power 4 mW x 2
Infrared Communication Port IrDA 1.1 compliant, 4 Mbps data transmission speed*3
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
Pointing Device Touch Pad
Speaker Speaker (built in) x 4
Utility Programs Setup Utility, DMI Viewer, Panasonic Hand Writing*4
Sound HRTF 3D positional audio support 16-bit stereo, WAVE and MIDI playback
Battery Pack Li-ion 10.8 V , 3.0 Ah
Operating Time*5Approx. 1.0 hours - 6.0*6hours
Battery Charging Time*5Power On Approx. 4.0 hours
Power Off Approx. 3.0 hours
Clock Battery Coin type lithium battery 3.0 V
AC Adaptor*
8
Input 100 V - 240 V AC, 50 Hz /60 Hz Output 15.6 V DC, 3.85 A
Power Consumption*
9
Approx. 40W *
9
/ Approx. 65 W (maximum when recharging in the ON state)
In use Temperature 5 ˚C to 35 ˚C *10 { 41 ˚F to 95 ˚F}
Environment 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)
Physical Dimensions (W X H X D) 297 mm X 44.5 mm X 265.6 mm {11.7 " X1.8 " X 10.5 "} (including the carrying handle)
Weight Approx. 2.9 kg {Approx. 6.4 lb .} (including the carrying handle)
Other Specifications
*
1
Only a RAM card designed for PC100 can be added.
*
2
Use only a monaural condenser microphone.
*
3
Separate communications software is necessary.
Windows NT: The infrared data communications can not be used at 4 Mbps data transfer speed.
*
4
Only Windows 98
*
5
Varies depending on the usage conditions, CPU speed, etc.
*
6
When using the Second Battery Pack
*
7
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.
*
8
Approx. 1.5 W when the battery pack is fully charged (or not being charged) and the computer is off.
Approx. 3.0 W when the [Wake up from LAN] has been enabled (models with both an internal modem and internal LAN port).
*
9
Rated power consumption.
*
10
Consecutive disk access of the SuperDisk Drive Pack between 30˚C and 35˚C {86 ˚F and 95 ˚F} for 15 minutes or more may damage the
data on the disk.
<Model with both an internal modem and internal LAN port>
Interface Internal LAN IEEE 802.3 10Base-T
IEEE 802.3u 100Base-TX

2 - 1
2. Names and Functions of Parts
Function Keys
LED Indicators
Before using the computer for
the first time, carefully read the
[Limited Use License Agree-
ment]. If you agree to the con-
ditions, remove the seal.
Security Lock
To adjust the volume
*
, select the on the task bar, then
[Volume Control].
*
You may also use the function keys to perform this operation
Fn + F5 or F6
Speaker on/off : Fn + F4
Speakers
Use this connector to connect headphones or am-
plifier-equipped speakers. Audio output from the
internal speaker is disabled when headphones or
external speakers are connected.
Headphone Jack
Microphone Jack
Use only a monaural condenser microphone.
Using an input source other than a monaural con-
denser microphone may not allow audio to be input
or may damage the equipment.
The illustrations shown may differ from the actual physical appearances.
PC Card Slots
Internal Modem
Multimedia Pocket
Carrying Handle
Multimedia Pocket Release Latch
For enhanced portability and
in-the-field efficiency.
LED Indicators
A cable can be connected to prevent
theft of your computer. For more
information, read the manual that
comes with the cable.
LOCK
Power Switch
LCD
Caps Lock
Numeric key (NumLk)
Scroll lock (ScrLk)
Hard disk status
Multimedia pocket device status
Power status of the multimedia pocket
Main battery pack status
Power status
MP
MP
RELEASE
Touch Pad

2 - 2
These holes allow heat to exit.
CAUTION
Do not block or place the computer in a
location that may prevent proper ventila-
tion.
External Display Port
DC-IN Jack
USB Ports
Ventilation Hole
RAM Module Slot
Expansion Bus Connector
Battery Pack
Infrared Communication Port
External Keyboard/Mouse Port
Parallel Port
Serial Port

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 LED board, a PAD board and a LID board.
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 power supply used by the Main board is generated on the Main board based on the voltage from the AC adapter.
Power is supplied to the AC adapter and battery pack in that order when the RTC power is off or is in
suspend mode. When neither power supply can be accessed, power is supplied from the clock battery
(RTC battery).
Block Diagrams
Power Supply Configuration Diagram
Power Supply System Description On mode Suspend
mode
Off/Hiber
nation
VC system (VC5, VC3, VC25, VC18,
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
10.8V
3000mAh
VA3
AC ADAPTOR 15.6V
VC1
VB3
VC3
VD12
DC/DC
CONVERTER
OUTPUT 5V
VOLTAGE
DETECTOR
BATTERY
CHARGER
AC IN*
DC/DC
CONVERTER
OUTPUT
1.6V /1.35V
DC/DC
CONVERTER
OUTPUT 3.3V
IC44
SYSPW
AC ON*
OVERVOL
VOLTAGE
REGULATOR
OUTPUT12V
VC5
VOLTAGE
DETECTOR
VOLTAGE
DETECTOR
VOLTAGE
DETECTOR
SUSB*
SUSB*
SUSB*
SUSC*
OVERVOL
VM1
ACVOK
VA5
AC15
OVERVOL
OVERVOL
VOLTAGE
REGULATOR
OUTPUT 1.5V
IC53
IC53
IC52
IC56
VD12ON
IC54
IC24 VGA_CORE
VOLTAGE
REGULATOR
OUTPUT 2.5V
VOLTAGE
REGULATOR
OUTPUT 2.5V
IC55
VCT
VC25
VB5
SUSC*

3 - 2
Mobile
MobileMobile
Mobile
Pentium
PentiumPentium
Pentium
int
intint
int l
lll
e
ee
e
Port Replicator
Port ReplicatorPort Replicator
Port Replicator
Serial, Parallel,
VGA, PS/2, USB,
MIC, HP, LAN
BIOS
BIOSBIOS
BIOS
FlashROM
512KB
Super I/O
Super I/OSuper I/O
Super I/O
PC97338
NS
64bit Host Bus
32bit PCI Bus
16/8bit ISA/EIO Bus
IrDA(FIR)
KBC
KBCKBC
KBC
Int. KB
Touch Pad
PS/2 Port
EC
ECEC
EC
(PMC)
(PMC)(PMC)
(PMC)
Li-Ion
Battery Pack
Serial
Parallel
3.3V
3.3V
1.5V GTL
PCI ISA
Bridge
PIIX4M
PIIX4MPIIX4M
PIIX4M
INTEL
IDE
Interface
USB
Interface
HDD
20GB2.5inch
CD-ROM
X24max
Secondary
USB x2
DEVICES
Primary
SuperDISK
(
120MB
)
440BX
440BX440BX
440BX
INTEL
Host PCI
Bridge
DRAM
Interface
Extension Memory
Extension MemoryExtension Memory
Extension Memory
)
))
)(SDRAM
(SDRAM(SDRAM
(SDRAM
~~~~128MB
128MB128MB
128MB
Main Memory
Main MemoryMain Memory
Main Memory)
))
) SDRAM
SDRAMSDRAM
SDRAM*
**
*
128MB
128MB128MB
128MB
LCD
13.3”
CRT Rage Mobility M
Rage Mobility MRage Mobility M
Rage Mobility M,
,,
,
ATI
ATIATI
ATI
VRAM
8.0MB
VGA
VGAVGA
VGA
AGP Bus
SOUND
SOUNDSOUND
SOUND
ES1988
ESS
ESSESS
ESS
Headphone
Ext. MIC
Speaker
X 4
AMP
AMPAMP
AMP
PCMCIA
PCMCIAPCMCIA
PCMCIA
478II
RICOH
RICOHRICOH
RICOH
TYPE II(SLOT A)
TYPE II(SLOT B)
SD/SC Slot
Selector
Touch
Screen
Super I/O
Super I/OSuper I/O
Super I/O
PC97338
NS
CDPD/ARDIS/BellSouth
CDPD/ARDIS/BellSouthCDPD/ARDIS/BellSouth
CDPD/ARDIS/BellSouth
/GSM
/GSM/GSM
/GSM
Bluetoot h
BluetoothBluetoot h
Bluetooth
Wireless Module
Mini-PCI TypeIII
Modem
ModemModem
Modem
Modem/LAN
Modem/LANModem/LAN
Modem/LAN
Selector
Mini-PCI TypeIII
LAN
LANLAN
LAN
IEEE802.11b
IEEE802.11bIEEE802.11b
IEEE802.11b
Right side
Reverse side
IIIIII
III
System Configuration Diagram

3 - 3
3.2 System Memory Map

3 - 4
I/O Address Map (CF-72)
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 cloc
k
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
)
x0338 - x033F Infrared PnP Serial Port
(
*PNP0510
)
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
)
x03F6 - x03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
x03F6 - x03F6 Primar
y
IDE controller
(
dual fifo
)
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 Lucent Win Modem
x1800 - x18FF ESS Alle
g
ro PCI Audio
(
WDM
)
x2000 - x20FF RAGE MOBILITY AGP
(
En
g
lish
)
x2000 - x2FFF Intel 82443BX Pentium
(
r
)
II Processor to AGP controlle
r
xFC20 - xFC3F Intel 82371AB/EB PCI to USB Universal Host Controller
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
lFlow 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
The following is a list of the messages that BIOS can display. Most of them occur during POST. Some of them display informa-tion
about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, such as the way
it has been configured. Following the list are explanations of the messages and remedies for reported problems.
If your system displays one of except the messages marked below with an asterisk (*), write down the message and contact
Panasonic Technical Support. If your system fails after you make changes in the Setup menus, reset the computer, enter Setup and
install Setup defaults or correct the error.
0200 Failure Fixed Disk
Fixed disk in not working or not configured properly. Check to see if fixed disk is attached properly. Run Setup. Find out
if the fixed-disk type is correctly identified.
0210 Stuck key
Stuck key on keyboard.
0211 Keyboard error
Keyboard not working.
0212 Keyboard Controller Failed
Keyboard controller failed test. May require replacing keyboard controller.
0213 Keyboard locked - Unlock key switch
Unlock the system to proceed.
0230 System RAM Failed at offset : nnnn
System RAM failed at offset nnnn of in the 64k block at which the error was detected.
0231 Shadow RAM Failed at offset :
nnnn
Shadow RAM failed at offset nnnn of the 64k block at which the error was detected.
0232 Extended RAM Failed at offset :
nnnn
Extended memory not working or not configured properly at offset nnn n.
0250 System battery is dead - Replace and run SETUP
The CMOS clock battery indicator shows the battery is dead. Replace the battery and run Setup to reconfigure the system.
*0251 System CMOS checksum bad - Default configuration used
System CMOS has been corrupted or modified incorrectly, perhaps by an application program that changes data
stored in CMOS. The BIOS installed Default SETUP Values. If you do not want these values, enter Setup and enter your
own values. If the error persists, check the system battery or contact Panasonic Technical Support.
0260 System timer error
The timer test failed. Requires repair of system board.
0270 Real time clock error
Real-time clock fails BIOS test. May require board repair.
*0280 Previous boot incomplete - Default configuration used
Previous POST did not complete successfully. POST loads default values and offers to run Setup. If the failure was caused
by incorrect values and they are not corrected, the next boot will likely fail. On systems with control of wait states, improper
Setup settings can also terminate POST and cause this error on the next boot. Run Setup and verify that the wait-state
configuration is correct. This error is cleared the next time the system is booted.
0281 Memory Size found by POST differed from EISA CMOS
Memory size found by POST differed from EISA CMOS.
02B0 Diskette drive A error
02B1 Diskette drive B error
Drive A: or B: is present but fails the BIOS POST diskette tests. Check to see that the drive is defined with the proper
diskette type in Setup and that the diskette drive is attached correctly.
02B2 Incorrect Drive A type - run SETUP
Type of floppy drive A: not correctly identified in Setup.
02B3 Incorrect Drive B type - run SETUP
Type of floppy drive B: not correctly identified in Setup.

4 - 4
02D0 System cache error - Cache disabled
Contact Panasonic Technical Support.
02F0: CPU ID:
CPU socket number for Multi-Processor error.
02F4: EISA CMOS not writable
ServerBIOS2 test error: Cannot write to EISA CMOS.
02F5: DMA Test Failed
ServerBIOS2 test error: Cannot write to extended DMA (Direct Memory Access) registers.
02F6: Software NMI Failed
ServerBIOS2 test error: Cannot generate software NMI (Non-Maskable Interrupt).
02F7: Fail - Safe Timer NMI Failed
ServerBIOS2 test error: Fail-Safe Timer takes too long.
device address Conflict
Address conflict for specified
devic e.
Allocation Error for:
device
Run ISA or EISA Configuration Utility to resolve resource conflict for the specified devic e.
Failing Bits :
nnnn
The hex number nnnn is a map of the bits at the RAM address which failed the memory test. Each 1 (one) in the map
indicates a failed bit. See error 230,231 or 232 for offset address of the failure in System, Extended or Shadow memory.
Invalid System Configuration Data
Problem with NVRAM (CMOS) data.
I/O device IRQ conflict
I/O device IRQ conflict error.
Operating System not found
Operating system cannot be located on either drive A: or drive C:. Enter Setup and see if fixed disk and drive A: are properly
identified.
Parity Check 1
nnnn
Parity error found in the system bus. BIOS attempts to locate the address and display it on the screen. If it cannot locate the
address, it displays ????. Parity is a method for checking errors in binary data. A parity error indicates that some data has
been corrupted.
Parity Check 2
nnnn
Parity error found in the I/O bus. BIOS attempts to locate the address and display it on the screen. If it cannot locate the
address, it displays ????.
Press <F1> to resume, <F2> to Setup
Displayed after any recoverable error message. Press <F1> to start the boot process or <F2> to enter a Setup and change the
settings. Write down and follow the information shown on the screen.

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.
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.
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
C5454 is 3.3V
If lower than 3V
Go to No. 1-6
IC58
NO Go to No. 1-5
R260
SW801
2
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
IC3
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 IC10 17
IC2
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 IC33
IC35
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 IC36-1
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 IC3
IC2
8-1
8Expansion card ROM
checksum error
Expansion card
Replace the expansion card.
Does operation return to
normal?
YES
Main PCBNO
8-2
Main PCB IC39-1
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
IC3
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 IC3
X2
12-4

4 - 7
4.4.3. LCD DIANOSIS
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
15 PCI failur Go to No. 15-2
Does the system return to
normal if the expansion card
is removed?
YES
Main PCBNO IC2
15-1
Expansion card
Replace the expansion card.
Does operation return to
normal?
YES
Main PCBNO IC2
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 IC3
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 IC2
IC10 17
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
CN903
IC49
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
IC4
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
IC4
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 CN903
IC49
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 IC31
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 IC31
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 IC31
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 IC31
7
6 Go to No. 7
Is the keyboard properly
connected?
YES
Keyboard was
not connected
properly
NO
6-1
Keyboard failure