Sharp PC-AX40 User manual

PERSONAL COMPUTER
MODEL PC-AX40
CHAPTER 1. OUTLINE......................................................................................1
CHAPTER 2. SPECIFICATIONS.......................................................................2
CHAPTER 3. TROUBLE SHOOTING................................................................5
CHAPTER 4. BLOCK DIAGRAM.....................................................................19
CHAPTER 5. CIRCUIT DIAGRAM AND PARTS LAYOUT .............................20
CONTENTS
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SERVICE MANUAL

Caution about Battery
Caution : Danger of explosion if battery is incorrectly replaced. Replace only with the
same or equivalent type recommended by the manufacturer. Discard used batteries
according to the manufacturer’s instructions.
Attention : Il y a danger d’explosion s’il y a remplacement incorrect de la batterie.
Remplacer uniquement avec une batterie du même type ou d’un type recommandé par
le constructeur. Mettre au rébut les batteries usagées conformément aux instructions du
fabricant.
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CHAPTER 1. OUTLINE
1. GENERAL DESCRIPTION
This Service Manual covers the changes made to the base models.
Read the following Service Manuals in conjunction with this Manual.
•PC-AX10 SERVICE MANUAL (CODE:00ZPCAX10SM-E)
•PC-AX20 SERVICE MANUAL (CODE:00ZPCAX20SM-E)
•PC-AX40 PARTS GUIDE (CODE:00ZPCAX40PG-E)
MAJOR MODIFICATIONS
Classification Item (Current model: PC-AX20) PC-AX40 Remarks
Destination Suffix A, E, G, H, I A, E, G, I, K
Circuit CPU Mobile Pentium III Processor
SpeedStep BGA2 600 MHz Mobile Pentium III Processor SpeedStep BGA2 700 MHz
LAN controller REALTEK: RTL8139BL REALTEK:RTL8139CL
USB Hub controller TI: TUSB2043 TI:TUSB2036
3.3 V/5V DC/DC TOYOTA:SB3053P MAXIM:MAX1632
1.5 V DC/DC TOYOTA: SB3032P MAXIM:MAX1711
IEEE1394 controller – µPD72872
Battery cell
(number of cells) Matsushita 1400 mAh square cell x 4 Matsushita 1800 mAh cylindrical cell x 8
Sheet battery
related-circuit Yes Abolished
Mechanism FAN Axial flow FAN Centrifugal FAN
Keyboard Light purple White, Korean version added
Touchpad Light purple Gray
Touchpad button Light purple Silver-painted
QSB button Light purple Silver-painted
VGA cap Gray Shape changed (slide type),
sliver-painted
Standard battery cabinet 4 square batteries 8 cylindrical batteries
Bottom CAB sheet battery
door Sliding Fixed cover (Support sheet battery is abolished)
Mail receive button Only for destination A For all destinations
HDD 12 GB (MK1214GAP) 20 GB (MHM2200AT)
Packaging and
labels Modem FCC label No Added to products destined for A/U
COA label Win Me destined for G only Win Me for all destinations

CHAPTER 2. SPECIFICATIONS
1. SPECIFICATIONS
Parts Specifications
CPU Mobile Pentium III 700MHz featuring Intel SpeedStep Technology
Secondary cache 256KB (Integrated with CPU)
ROM Including system BIOS and VGA BIOS
RAM System SDRAM 64MB (expandable to 192MB)
Video 4MB
Display Panel Active Matrix (TFT) color LCD
Video controller ATI Mobility-M
Keyboard IBM compatible keyboard
Pointing device Glide pad (touch-sensitive control pad with 2 buttons )
Drive Hard disk IDE interface
Floppy disk (external) 3.5", 1.44MB/720KB
CD-ROM (external) 24x speed (option)
PC card slot Type II x 1 (PCMCIA 2.1 compliant) CardBus compliant
Audio system Monaural microphone, monaural speaker, sound system compliant with AC97 audio
I/O ports Audio Audio output jack ( stereo, S/PDIF compliant), external microphone jack
Video External monitor port
Others Two USB ports, two mini USB ports (for floppy disk drive unit), IEEE 1394 port
Infrared IR port (IrDA:115Kbps/4Mbps, SHARP ASK:9600bps)
Modem Data: 56Kbps (receive), 33.6Kbps (send), Fax: 14.4Kbps
LAN 100Mbps operation
Power AC adapter 100-240V, 50-60 Hz
Battery Rechargeable lithium ion battery
Battery life Approximately 3 hours (standard battery only)
Approximately 3.5 hours (high capacity battery pack (CE-BL10) only)
*battery life varies depending on usage
Battery charging time
*Charging time varies
depending on usage
Standard battery Turned off/hibernation: about 3 hours
Turned on: about 7.5 hours
High capacity battery pack Turned off/hibernation: about 3.5 hours
Turned on: about 8.5 hours
Dimensions Computer 10.55" wide x 9.44" deep x 0.96" (min.)/1.48" (max.) high
(268mm x 242mm x 24.4mm (min.)/38mm (max.))
Floppy disk drive unit 4.37" wide x 5.31" deep x 0.81" high
(111mm x 135mm x 20.5mm)
Weights Computer About 3.97 lb (1.8 kg)
Floppy Disk Drive Unit About 0.57 lb (260 g)
Operating Temperature 50°F to 95°F (10 °C to 35 °C)
environment Humidity 20% to 80% (non-condensation)
Options
High Capacity Battery Pack CE-BL10
External CD-ROM Drive CE-CD03
AC Adapter CE-J03V (may not be available in some countries)

2. DIFFERENCES BY DESTINATION
Model Name PC-AX40
Model Name
(Sharp internal name) A3PCAX40E A3PCAX40A A3PCAX40G A3PCAX40I A3PCAX40K
Version code E A G I K
Destination countries SRSSC (Malasia)
SEA (Austria) SRH (Hong Kong), SCA (Australia),
SBI (India)
SEEG (Germany) SEIS (Italy) SEI (Korea)
Main Sepcifications
CPU Pentium III 700MHz
L2 Cache 256KB On Die
Memory 64MB SDRAM(Max.192MB)
LCD 12.1" XGA TFT
HDD 20GB
FDD External (USB I/F)
CD-ROM drive Optional
Modem N/A
LAN 100Base-TX/10Base-T
IEEE1394 Yes
PC card slot Type II x 1 (CardBus)
Keyboard US English German Italian Korean
Pointing devise Glide pad
Mail Check button Yes
IR ASK + IrDA (4Mbps)
OS Windows Me (English) Windows Me (German) Windows Me (Italian) Windows Me (Korean)
Badge/Label
Badge on the LCD
cabinet "SHARP" logo
Seal on the FDD "SHARP" logo
Microsoft COA label Yes
Intel Inside label Pentium III
OS/Software
HDI version U/A/H/E U/A/H/E G I K
Windows Me English German Italian Korean
IE5.5 English German Italian Korean
Adobe Acrobat Reader English German Italian None
FaxTalk English German Italian None
Photo Suite III English German Italian English
StudioDV None
SpeedStep utility English German Italian Korean
QSB utility English German Italian English
Automatic E-mail
Receiver English
RealPlayer/Jukebox None
Voquette English None
VirtualCD None
McAfee VirusScan English None
Default Wallpaper SHARP ver.

Accessories
AC cable None US UK Germany None
AC adapter Yes
Modem cable None Yes (US) Yes (A-tick) Yes (UK) Yes Yes
LAN cable with core Yes None Yes None
Core for LAN None Yes None Yes
FDD Yes
FDD Cable Yes
WinMe First Step
Guide English German Italian Korean
Recovery CD U/A/H/E ver. G ver. I ver. K ver.
BootFD Yes
Warranty None US warranty set None UK warranty None
Operation manual English German None
Re-install manual English German None
Unpacking list English German None
Welcome sheet None
Regulations
EMI CE FCC15 A-tick CE Korean EMC
Safety CB, PSB, TUV UL 3rd CB, NSW TUV
PTT FCC68 ACA CTR21 Korean PTT

CHAPTER 3. TROUBLE SHOOTING
1. Trouble shooting
2. Device problem
3. Power source abnormal
4. Power on problem
5. Power line problem
6. 3.3V/5V problem
7. VTT problem
8. VCC_CORE problem
9. Battery charge problem
10. Sheet Battery charge problem
11. Clock problem
30. PDC Adapter problem
29. FDD problem
28. CDROM problem
27. IEEE1394 problem
26. USB HUB problem
25. USB2 problem
24. USB1 problem
23. LAN problem
22. IR problem
21. PCMCIA problem
20. Modem problem
19. Audio problem
18. Touch pad problem
17. Keyboard problem
16. CRT problem
15. LCD problem
14. HDD problem
13. BIOS problem
12. MEMORY problem
Power on
System work?
Charge problem
Device problem
BIOSCS# OK?
Device problem 2
POWEROK = H?
Check R90,R570,U14,U16
X504 32.768kHz OK?
VCC_RTC >2.6V
Check U510
every Clock OK?
Clock problem
Check U509,U510
Start
Y
N
Y
N
N
Y
Y
N
Y
N
N
Y
Y
N
1/30
Power LED light?
Power source abnormal
Y
N
1. Trouble shooting
Check D16,D18,D20,
C160,R125,C152
Check X504,R554,
C528,C538
PCIRST# OK?
RSTDRV OK?

2. Device problem
3. Power source abnormal
Device problem 1
End
Device problem 2
End
BIOS ROM
MEMORY
HDD
CRT
LCD
PCMCIA
Keyboard
Touch pad
FDD
IR
Audio
Modem
USB1,2
Internal Battery Charge
External Battery Charge
Battery Gauge
LAN
System Freeze
2/30
IEEE1394
USB3,4
USB HUB
3/30
With AC adapter
Power source abnormal
N
Insert AC adapter
System power on?
Battery Voltage > 12V?
VMAIN > 11V
BATT1 > 12V?
Battery Dead
PU504 ON?
Check PL502
Power ON problem
Power ON problem
Y
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
Check
PU504,PR21,PR24,PQ1,PC23
PR515,PR31,PR30,PR35
Check PF503,PL504,
PLPC517,PC518506
Check AC adapter,PF1,
PD2,PL512,PC1,PC501,
PR1,PC2,PD1,PL501,
PC502,PC503,PC504
VMAIN 19V
Remove AC adapter
Insert Battery
Remove battery
Insert AC adapter

4. Power on problem
5. Power line problem
H8_VDDA = 5V?
Power ON problem
N
4/30
Check SW1,R504,C505
Y
U10 2pin = LOW?
Check
X1,R115,C151,C155
Check
SW501,R571,C76,U10
Check
U501,U512,D17,C161
Power line problem
Y
Y
Y
N
N
N
Power line problem
5/30
Y
N
VTT problem
+3V = 3.3V?
Y
N
3.3V/5V/12V problem
Y
N
VCC_CORE problem
System problem
VTT = 1.5V?
or
VCC_CORE 1.35V?
VCC_CORE 1.6V?
MCU clock OK?
(U16 2,3pin)
U16 7pin becomes
low by Power SW

6. 3.3V/5V problem
7. VTT problem 8. VCC_CORE problem
3.3V/5V/12V problem
6/30
+3V OK?
N
Y
Change D/D Board
N
Y
+3V_P OK?
N
Y
N
Y
Check +3V power line
+5V_P OK?
Change D/D Board
Check +5V power line
+5V OK?
VTT problem
7/30
VTT-GND Shortage?
Check VTT power line
Y
N
VCC_CORE problem
8/30
Check U16,D14,R84
Check
PR23,PR24,D14,R84
N
Y
N
Y
N
Y
Check
PU507,PU506,PU504,PU503,
PR24,PR23,C516,PC20,
PC517,PC522,PC520,PC521
and VCC_CORE power line
Check
PU504,PU503,PU506,
PU507PR14,PL503,
PR22,PL3,PR24,PR23
VCC_CORE-GND
Shortage?
PU2 2pin is
always low?
(or 1.35V)
just after P_ON
VCC_CORE 1.6V
Check PU502,PL502,
PR505,PL505,PU505
Check D/D board,
+5V_P power line
PU1,PL2,PQ501,
PR501,L508,PL510
Check +12V power line
PU501,PD3
Check D/D board,
+3V_P power line
U502,PQ502
PU502,PL3,PR508,
PL507,PL509