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.
>>>>> USE FONT <<<<<
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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

System can charge?
Sheet Battery charge problem
N
10/30
Y
Change battery unit
BATT2 > 12V?
N
Y
Check Battery unit
N
Y
Check
PL512,PF1,PD1,PL501
D/BAT_T2 < 3.3V?
N
Y
Check PR14,PR16,R76
D/BAT_T2 > 0.77V?
N
Y
Check PC30,Temperature
CHARGE_B = high?
N
Y
Check U16
Battery level > 95%
N
Y
OK
System can charge?
Battery charge problem
N
9/30
Y
Change battery unit
BATT1 > 12V?
N
Y
Check Battery unit
N
Y
Check
PL512,PF1,PD1,PL501
D/BAT_T1 < 3.3V?
N
Y
Check PR4,PR5,R77
D/BAT_T1 > 0.77V?
N
Y
Check PC8,Temperature
CHARGE_A = high?
N
Y
Check RP26,U16
Battery level > 95%
N
Y
OK
9. Battery charge problem 10. Sheet Battery charge problem
Check
PD505,PR507,PQ504,
PQ505,PF504,PQ507,
PQ2,PU506
Check
PJ501,PF502,PL503
VMAIN 19V?
VMAIN 19V?
Check
PJ1,PF503,PL504
Check
PD505,PR507,PQ504,
PQ505,PF504,PQ507,
PQ2,PU505

11. Clock problem
12. MEMORY problem
Clock problem
N
11/30
Y
X503 14.318MHz OK?
N
Y
HCLK0 66MHz OK?
N
Y
N
Y
N
Y
N
Y
Check X503,R47,C61,C60
U507 47pin = 2.5V?
N
Y
Check L503,C62,C57,C513
Check U508Check R534,R581,U508
Check
U508,R531,R532,R533
BIOS ROM
MEMORY (128M)
12/30
Reomove U3
System detect 64MB?
Y
N
Check
U3,U4,U5,U6,U510
MEMORY (64M)
Check
U503,U504,U505,
U506,U510
Check
U503,U504,U505,
U506,U510
SDRAMCLK0 = 100MHz?
SDRAMCLK1 = 100MHz?
SDRAMCLK2 = 100MHz?
SDRAMCLK3 = 100MHz?
Check
R542,R540,R538,R545,
R543
PCICLK_F = 33MHz?
PCLK1394 = 33MHz?
PCLKCARD = 33MHz?
PCLKLAN = 33MHz?
PCLKVGA = 33MHz?
48MHz_USB = 48MHz?
48MHz_USBHUB = 48MHz?
U508
1,6,14,19,27,30,36pin
= 3.3V?
Check L38,L10,L13,C59,C58,C75,
C70,C65,C63,C72,C69,C71,
C66,C513,C62,C57,C79,C73,C84

14. HDD problem
13. BIOS problem
BIOS ROM
Y
N
13/30
Check signal shortage
Y
N
Check BIOSCS#
Check BIOS ROM
Motor works?
HDD
Y
N
14/30
Check HDD,HDD FPC
HDD_PWR# = low?
J6 41,42pin = 5V?
Check U510
Check U510
IDE_RST# = low?
Y
NN
N
Y
Y
Remove CDROM FFC
Still have error?
Y
N
Check
R246,Q32,Q30,R223,C222,
L31,C252,C229
Check HDD,HDD
FPC,J6,RP505,RP506,RP507,
RP508,RP509,RP510,RP511,
R553,Q31,R172,Q29,R186,
R202,R190,U510
Check FFC,
CDROM USB PCB
SA0-SA18 Works?
(High level > 3.0V)
D0-D7 Works?
(High level 5V)

16. CRT problem
15. LCD problem
LCD
15/30
Backlight ON?
CRT can display?
Check U507
Check U507
FPVDDEN = high?
+12V_LCD = 12V?
+12V = 12V?
Check U507,J2
Check U507
Check U507
FPVDDEN = high?
VPP problem
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
N
LCD can display?
CRT
Y
N
16/30
Detect CRT?
RGB correct?
Check U507
Y
Y
Y
N
N
N
LCD problem
Check
D5,D7,J501,J503,Q3,Q4,
R7,R8,L4,L5
HSYNC(J1 13pin)
VSYNC(J1 14PIN)
OK?
Check
U507,RP2,CP1,J501,J503,
RP501,CP501,FA502
Check
J501,J503,Q1,Q2,L506,
FA502,U507
+3V_LCD = 3.3V?
+5V_LCD = 5V?
Check
D8,R248,R43,C38,Q6,R33,Q7,
R38,C33,Q5,R23,Q4,C26,Q3
Check
R22,D9,R9,C20,Q1,Q2,R10

18. Touch pad problem17. Keyboard problem
Keyboard is OK?
Keyboard
Y
N
17/30
Change Keyboard
Lock key LED OK?
Y
N
Check J4,U16
Check J1,Quick Key FPC
Quick Key OK?
Y
N
Touch pad clean?
Touch pad
Y
N
18/30
Clean up
Change Touch pad
OK? Y
N
Check Touch pad
Check FFC between touch
pad and M/B
Check
L19,L20,L23,C171,
CP2,R161,R162
Check
U12,R2,R3,R4,J501,J503

19. Audio problem
Int Speaker works?
Audio
N
19/30
Y
Head phone works? N
Y
SPK_OFF = low? N
Y
Check U510
Int Mic works?
N
Y
Ext Mic works?
Y
N
Check L42,L41,C277,MIC1
U25 1,9pin = 3.3V N
Y
VA = 5V? N
Y
Check R230,C267,C268
Check L509
X3 = 24.576MHz? N
Y
Check U25
Check
X3,R222,C240,C260
Check
Speaker,R211,R221,C244,
R216,R205,J9
Check
J10,L515,L516,C570,C582,
U24,C243,C237,VR501,L520,
L514,C632,R609,Q34,R231,
Q35,R622,Q504,U25
Check
J11,L517,L29,C600,C599,
C562,R618,R623

22. IR problem
21. PCMCIA problem
20. Modem problem
OK?
Modem
N
20/30
Y
Change MODEM unit
Change MODEM unit
MODEM cable OK?
N
Y
Check MODEM cable
MDC/LAN PCB OK?
N
Y
Check MDC/LAN PCB
Sound OK ?
N
Y
AUDIO
System
supply CARDVCC?
PCMCIA
Y
N
21/30
Check U23
Detect card type?
Check J504,U22
Y
N
IR
22/30
IR works?
N
Y
Check D/D PCB
U2 6pin = 3V?
N
Y
Check R506,C504,C6
Change D/D PCB
Check
U2,R514,R515,C9,J501,
J503,R102,U15
Check
RP35,RP36,RP37,R206,
R583,R227,J504
Check
J506,C191,R597,R575,
C553,C549,R578,C546,
R573,R572

24. USB1 problem
23. LAN problem
LAN Detect?
LAN
N
23/30
Y
AVDD = 5V?
Check L21,C166,C163,D21
Y
N
J3 1pin = 5V?
USB1
N
24/30
Y
Check L3,C3,C4,C8,F501
N
Y
Check R502,R503
USBPD0+,USBPD0- OK?
N
Y
Check L7,C501,C505
J8 1pin = 5V?
USB2
N
Y
Check L523,C616
N
Y
Check R602,R603
USBPD1+,USBPD1- OK?
N
Y
USB HUB problem
USB_OC#1 3.3V?
USB_OC#0 3.3V?
Check L524,L43,
C617,C618
Check
U510,R557,R558,R158,
R159,C539,C540
Check
J3,J4,F2,F3,F4,F5,J7,R187,
R188,R192,R193,U21,C212,
C206,R189,R194,R178,R179
Check
U20,L22,OSC1,R166,R165,
R156,U18,R178,R505,R191,
R183,R181,L24

27. IEEE1394 problem
26. USB HUB problem
25. USB2 problem
J509 1pin = 5V?
USB3
N
25/30
YCheck L513,C568,C585,
F504
N
Y
Check R608,R621
USBPD2+,USBPD2- OK?
N
Y
Check L510,C581,C575
J501 1pin = 5V?
USB4
N
Y
Check L2,C502,C1,F1
N
Y
Check R1,R2
USBPD3+,USBPD3- OK?
N
Y
Check L1,C2,C3
USB HUB problem
USB HUB problem
+3V_USBHUB = 3.3V?
USB HUB
N
Y
Check JS502
N
Y
Check U510
USBP1+,USBP1- OK?
26/30
IEEE1394
N
27/30
Y
N
Y
Check L505,L25
IEEE1394 Device
detect ?
PHYVDD = 3V?
PHYAVDD = 3V?
Check
R215,R218,R219,R210,R208,
C242,C230,C235,R217,R214,
R207,R209,J508
Check
U19,U511,R69,R65,R548,
R561,R562,R517,C529,
R180,X2,C168,C167,R121,
R124,R530,R131
USB_OC#3 3.3V?USB_OC#2 3.3V?
Check
R555,R556,R567,R568,
R601,R595,R589,U519

30. PDC Adapter problem
29. FDD problem
28. CDROM problem
CDROM
28/30
CD Works? Y
N
Check CDROM drive
Change CDROM drive
Y
N
Check FFC, CD USB PCB
CD_PWR# = low?
Check U510
CD Works?
Y
N
N
Y
FDD works?
FDD
Y
N
29/30
Change FDD
Check FDD unit
USB
OK?
PDC Adapter
N
Y
Change PDC Adapter unit
Check PDC Adapter unit
30/30
USB
Change CDROM FFC Bç
CD USB PCB
Check
J510 41,42,43pin
= 5V?
Check
U520,U521,U522,RP509,
RP507,RP505,RP506,
RP508,RP510,RP511
Check
L522,Q505,C611,C607,
C608,R637,Q506,R243