Panasonic Toughbook CF-28 Series User manual

ORDER NO.CPD0102001C0
Notebook Computer
© 2001 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-28 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-28 Z
LCD type
C: for 13.3" TFT Color
with Touch Screen
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
P: for Spain
Drive
A: Floppy Disk drive
CPU type
M: for Intel®Mobile Pentium®III
Processor 600 MHz
Operating System
C: Microsoft®Windows NT®
D: Microsoft®Windows®2000
E: Microsoft®Windows®98
CF-28
When this product is repaired, the Access Key is necessary
to release security of electrical and mechanical.
Ask the customer to provide the Access Key with this product.

- 2 -

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 : 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
- 3 -

Contents
1. Specifications.......................................................
2. Name and Functions of Parts..........................
3. Technical information........................................
3.1. System Overview.............................................
3.2. System Memory Map.......................................
3.3. I/O Address Map..............................................
4. Diagnosis Procedure..........................................
4.1. Basic Procedures.............................................
4.2. Power-On Self Test (Boot Check)....................
4.3. List of Error Codes...........................................
4.4. Diagnosis Map..................................................
5. Diagnostic Test....................................................
5.1. Diagnostic Test Procedure...............................
5.2. Error Message..................................................
6. Disassembly/Reassembly.................................
6.1. Removing the Battery Pack..............................
6.2. Removing the HDD Unit...................................
6.3. Removing the Unit
from inside the Multimedia Pocket..................
6.4. Removing the Keyboard.................................
6.5. Removing the Display Unit...............................
6.6. Removing the RAM Card.................................
6.7. Removing the Lower Casing
and the Handle............................................
6.8. Removing the I/O Board.................................
6.9. Removing the Modem Board......................
6.10.Removing the MP Connection Unit..................
6.11.Removing the Main PCB.................................
6.12.Removing the Touch Pad Unit......................
6.13.Removing the PCMCIA CN
(PC Card Slot)..............................................
6.14.Removing RTC Battery....................................
6.15.Removing the INVERTER,
the Touch Screen PCB
and TS13 PCB.................................................
6.16.Removing the LCD
and the Touch Screen.....................................
7. Wiring Connection Diagram.............................
8. Exploded Views.................................................
9. Replacement Parts List...................................
1-1, 1-2
2-1, 2-2
3-1~3-4
3-1, 3-2
3-3
3-4
4-1~4-12
4-1
4-2
4-3, 4-4
4-5~4-12
5-1~5-15
5-1~5-9
5-10~5-15
6-1~6-5
6-1
6-1
6-2
6-2
6-3
6-3
6-3
6-4
6-4
6-4
6-4
6-5
6-5
6-5
6-6
6-6
7-1
8-1~8-6
9-1~9-10
- 4 -

This page provides the specifications for the basic model CF-28xxxxZxx. 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:
1Run the Setup Utility.
2The 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. Specifications
*1A 16M color display is achieved by using the dithering function.
*21GB = 109bytes
Main Specifications
Model No.
CPU
Memory (Expandable to)
Video Memory
LCD Type
Displayed Colors*1
External Display
Hard Disk Drive
Operating System
Mobile Pentium®Processor
600 *5? featuring Intel®SpeedStep™ Technology
L1 Cache Memory: 32 %+
L2 (Second) Cache Memory: 256 %+
128 *+ (384 *+ Max. )
4 *+
13.3 type (TFT)
256/65536/16M colors (640 x 480 dots/800 x 600 dots/1024x768 dots)
256/65536/16M colors (640 x 480 dots/800 x 600 dots/1024x768 dots)
20 @+*2
Microsoft®Windows NT®(for CF-28MCFAZCx)
Microsoft®Windows®2000 (for CF-28MCFAZDx)
Microsoft®Windows®98 Second Edition ( FAT32 File System ) (for CF-28MCFAZEx)
CF-28MCFAZxx
1 - 1

720 %+/1.44 *+
PC Card Slots Two Type or Type , or one Type 
Allowable current 3.3 V: 400 /, 5 V: 400 /
(total for two slots)
RAM Module Slot*1144-pin, 3.3-8, 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
Headphone Jack Miniature jack, 3.5 DIA
Impedance 32 , Output Power 4 A 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 80-pin female
USB Port 4-pin
Internal Modem Data: 56 "# (V.90 & K56flex) FAX:14.4 "#
Touch Pad, Touchscreen (Anti-Reflection, Finger and stylus (included) touch capable)
Monaural Microphone (built in)
Monaural Speaker (built in)
Setup Utility, DMIViewer, Panasonic Hand Writing*4
16 #, 44.1 "5? PCM/FM Sound
Li-ion 11.1 8, 5.4 /
Operating Time*5Approx. 3.5 hours - 5.2 hours
Charging Time*5Power On Approx. 5.5 hours
Power Off Approx. 3.0 hours
Coin type lithium battery 3.0 8
Input 100 8- 240 8AC, 50 5?/60 5? Output 15.6 8DC, 3.85 /
Approx. 40 A*8/ Approx.60 A(maximum when recharging in the ON state)
In use Temperature 5 B& to 35 B& {41 B! to 95 B!}
Humidity 30Cto 80C65 (No condensation)
Not in use Temperature -20 B& to 60 B& {-4 B! to 140 B!}
Humidity 30Cto 90C65 (No condensation)
302  X 63.5  (at the rear)/65.5 (at the front) X 275 
{11.9 "X2.5/2.6 "X 10.8 "} (including the carrying handle, excluding protrusion)
Approx.4.1 " {Approx. 9.0 #.} (including the carrying handle)
Other Specifications
*1Only a RAM card designed for PC100 can be added.
*=Use only a monaural condenser microphone.
*DSeparate communications software is necessary.
Windows NT:The infrared data communications can not be used at 4 *# data transfer speed.
*EOnly Windows 98
*FVaries depending on the usage conditions, CPU speed, etc.
*GThe AC adaptor is compatible with power sources up to 240 8AC adaptor.
This computer is supplied with a 125 8AC compatible AC cord.
*1Approx.1.5 Awhen the battery pack is fully charged (or not being charged) and the computer is off.
*Rated power consumption.
Keyboard
Floppy Disk Drive
Slots
Interface
Pointing Device
Internal Microphone
Speaker
Utility Programs
Sound
Battery Battery Pack
Clock Battery
AC Adaptor*6
Power Consumption*7
Environment
Physical Dimensions (W X H X D)
Weight
87 keys for US market. 88 keys for European market.
1 - 2

2. Names and Functions of Parts

LED Indicators
LCD
Touch Pad
!"#
$#
Function Keys
Internal Microphone
#
'
DC-IN Jack
Infrared Communication Port
PC Card Slots
Internal Modem
+,
-.
/0 ,
$
Power Switch
Access Lock
LED Indicators
!#22

Carrying Handle
&"
3""3"
4"4"
*"$
5"
6$
+"
(
Security Lock
/##$
 !
,
#
LOCK
7$*, 
"#,-8&0
*9"

Fn + F5  F6 
Fn + F4
Speaker
Multimedia Pocket (Floppy Disk Drive)
:
2 - 1

USB Port
Parallel Port
Serial Port
External Display Port
Expansion Bus Connector
3/
/G(/
7

Microphone Jack
3

3
/


G
@ A
@A
*3

J
External Keyboard/Mouse Port
Hard Disk Drive
Headphone Jack
Battery Pack
MP Release Lever
65##
#:
Attaching the strap
2 - 2

3.Technical Information
3.1. System Overview
3.1.1 System Configuration
The main system is made up of a Main board, a RJ board, an IR board, a Battery board and a TS13 board.
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
-+&.-/-
0-+&&&-+&+&.
%/'


Li-Ion BATTERY
11.1V
5400mAh
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
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
VD12ON
VGA_CORE
VOLTAGE
REGULATOR
OUTPUT 2.5V
VOLTAGE
REGULATOR
OUTPUT 2.5V
VCT
VC25
VB5
SUSC*
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

3 - 1

PR-HeadPhone
PR-Mic.
PR-CRT
PR-USB
PR-PS/2
(
KB& Mouse
)
PR-Parallel
PR-Serial A
PR-Serial B
AUX sound
MM
MMoo oobb bbii iill llee ee
PP
PPee eenn nntt ttii iiuu uumm mm
ii
iinn nntt tt ll
ll
ee
ee
Port Re
p
licator-CN
BIOS
FlashROM
512KB
Super I/O
PC97338
NS
64bit Host Bus
FD
KBC
Int. KB
Tou ch P a d
PS/2 Port
EC
(PMC)
Li-Ion
Battery Pack
PR-Serial
Parallel
1
6
/
8b
i
t
I
S
A/EI
O
B
us
32bit PCI Bus
1.5V GTL
PCI ISA
Brid
g
e
PIIX4M
INTEL
IDE
Interface
USB
Interface
HDD
20GB2.5inch
Primary
443BX
INTEL
Host PCI
Bridge
DRAM
Interface
Extension Memory
SDRAM
2
56
MB
Main Memory SDRAM
64MB/128MB
LCD
12.1Ó
13.3Ó
CRT
LynxEM4
SMI
VRAM
4.0MB
VGA AGP Bus
SOUND
ES1988
ESS
Ext. MIC
S
p
eaker
AMP
PCMCIA
478II
RICOH
Tou ch
Screen
Super I/O
PC97338
NS
Mini-PCI TypeIII
(Slot B)
PCMCIA
475
RICOH
CD-ROM X24max
Su
p
erDISK
(
120MB
)
Secondary
DVD-ROM X4max
Int. MIC
Mini-PCI TypeIII
(Slot A)
Modem
Serial
GPS
or Serial D
Wireless Modem
or Serial C
IrDA
Analog-SW
Head
p
hone
RJ11
TYPE-II (SLOT A)
TYPE-II (SLOT B) TYPE-II (SLOT C)
SW
Telephony (Mono-out / Phone)
Tester
Selector
Selector G/A
Configuration I/F
System Congiguration Diagram
3 - 2

3.2. System Memory Map
3 - 3

3.3. I/O Address Map
Address Function IC No.
x0000 - x000F Direct memory access controller
x0010 - x0018 Motherboard resources
x001F - x001F Motherboard resources
x0020 - x0021 Programmable interrupt controller
x0022 - x0022 Motherboard resources
x0024 - x0025 Motherboard resources
x0028 - x0029 Motherboard resources
x002C - x002D Motherboard resources
x002E - x002F Motherboard resources
x0030 - x0031 Motherboard resources
x0034 - x0035 Motherboard resources
x0038 - x0039 Motherboard resources
x003C - x003D Motherboard resources
x0040 - x0043 System timer
x0050 - x0052 Motherboard resources
x0060 - x0060 Standard 101/102-Key or Microsoft Natural Keyboard
x0061 - x0061 System speaker
x0062 - x0062 Motherboard resources
x0064 - x0064 Standard 101/102-Key or Microsoft Natural Keyboard
x0066 - x0066 Motherboard resources
x0070 - x0071 System CMOS/real time clock
x0072 - x0077 Motherboard resources
x0080 - x0080 Motherboard resources
x0081 - x008F Direct memory access controller
x0090 - x009F Motherboard resources
x00A0 - x00A1 Programmable interrupt controller
x00A4 - x00A5 Motherboard resources
x00A8 - x00A9 Motherboard resources
x00AC - x00AD Motherboard resources
x00B0 - x00BD Motherboard resources
x00C0 - x00DF Direct memory access controller
x00F0 - x00FF Numeric data processor
x01B0 - x01B1 Motherboard resources
x01F0 - x01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
x01F0 - x01F7 Primary IDE controller (dual fifo)
x02F8 - x02FF MP3930V-W(C) Modem
x0338 - x033F Infrared PnP Serial Port (*PNP0510)
x0378 - x037F ECP Printer Port (LPT1)
x0398 - x0399 Motherboard resources
x03B0 - x03BB Silicon Motion LynxEM
x03C0 - x03DF Silicon Motion LynxEM
x03F0 - x03F5 Standard Floppy Disk Controller
x03F6 - x03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
x03F6 - x03F6 Primary IDE controller (dual fifo)
x03F7 - x03F7 Standard Floppy 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 Primary IDE controller (dual fifo)
x1050 - x105F Intel 82371AB/EB PCI Bus Master IDE Controller
x1060 - x1067 MP3930 MiniPCI Modem Enumerator
x1400 - x14FF ESS Allegro PCI Audio (WDM)
xFC20 - xFC3F Intel 82371AB/EB PCI to USB Universal Host Controller
xFE00 - xFE01 Motherboard resources
3 - 4

4. Diagnosis Procedure
4.1. Basic Procedure
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

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


4 - 1

4.2. Power-On SelfTest (Boot Check)
4.2.1 Outline of POST
 !" #
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$%
$&'!$ (#
&
)!*+# )!*,#-*.

!.!#","/"+#
!-#
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.!#", 1' 3 
1' 3 
3%
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3%
3%
3%
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."/"+"/
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1' 3 ,".","/
4,","/".

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4.2.2 Error Diagnosis by Checking Beep Signal Sound
4 - 2

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
information 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 nnnn.
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 SETUPValues.If you do not want these values, enter Setup and enter your own
values. If the error persists, check the system battery or contact PanasonicTechnical 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.
02D0 System cache error - Cache disabled
Contact Panasonic Technical Support.
4 - 3

02F0: CPU ID:
CPU socket number for Multi-Processor error.
02F4: EISA CMOS not writable
ServerBIOS2 test error: Cannot write to EISA CMOS.
02F5: DMATest 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 - SafeTimer NMI Failed
ServerBIOS2 test error: Fail-Safe Timer takes too long.
device address Conflict
Address conflict for specified
device.
Allocation Error for: device
Run ISA or EISA Configuration Utility to resolve resource conflict for the specified device.
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 - 4

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
1 No power is sent to the
unit. YES Go to No. 1-5 NO Go to No. 1-2
Is voltage pin 4 of Q53 lower
than 1V?
YES
NO If lower than 15V D19, D20
D21, D22
1-2
1-1 Is 15V applied to pins 5-8 of
Q53? (Whichever one)?
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 8~11.4V applied to pins
1~3 of Q50? (Whichever one)
Main PCB IC74
YES
If they show
soldered
completely
R355, R356
R365, R367
1-4
1-5
Check soldered parts of
R355, 356, 365 and R367. NO
2-1
IC74YES
1-3
Before setting the power
switch to ON, check voltage
on either side of R372. Is
Voltage 3.3V? If not 0V
NO If voltage of
C404 is 3.3V
If lower than 3V
Go to No. 1-3
IC74
NO Go to No. 1-2
R372
POWER SW
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)
IC43
(FDD/SDD)
IC43
IC47
NO Main PCB
IC20
Main PCB IC43 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 IC35~IC41
IC80~IC83
IC33
33-1 Replace the Main PCB.
Memory count is too large
or too small.
AC Adapter
4 - 5

Component
Source of
problem
No. Symptom Troubleshooting
procedures
No.
Result
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 IC50
IC51
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 IC436-1
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 IC43
IC33
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 IC439-1
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
IC43
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 IC43
X2
12-4
15 PCI failur Go to No. 15-2
Does the system return to
normal if the expansion card
is removed?
YES
Main PCBNO
15-1
Expansion card
Replace the expansion card.
Does operation return to
normal?
YES
Main PCBNO
15-2
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
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
IC43
IC33
IC33
IC33
IC35~IC41
IC80~IC83
4 - 6

4.4.3 LCD DIAGNOSIS
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
22-1 Does the LCD display
properly after brightness
level is adjusted?
Display is too dark or too
bright.
LCD
Go to No. 3-2
33-1 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
CN9
IC20
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
IC6
YES
NO
Inverter PCB
Go to No. 4-2
44-1 Replace the Inverter PCB.
Does operation returnt o
normal?
Backlight does not turn on. YES
NO
Main PCB
LCD cable
IC6
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 CN9
IC20
4-3 Replace the backlight. Does operation return to
normal?
YES
NO
4 - 7

4.4.4 KEYBOARD, MOUSE orTOUCH 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.
22-1 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 IC79
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 IC79
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 IC79
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 IC79 7
6Go to No. 7
Is the keyboard properly
connected?
YES Keyboard was
not connected
properly
NO
6-1
Keyboard failure
4 - 8