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Sharp PC-AX40 Service Manual

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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
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.
SERVICE MANUAL
PERSONAL COMPUTER
MODEL
CONTENTS
SHARP CORPORATION
PC-AX40
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

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Summary of Contents for Sharp PC-AX40

  • Page 1: Table Of Contents

    SERVICE MANUAL PERSONAL COMPUTER PC-AX40 MODEL CONTENTS 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 Parts marked with "...
  • Page 2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->...

  • Page 3: Chapter 1. Outline

    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...

  • Page 4: Chapter 2. Specifications

    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 100Mbps operation Power AC adapter...
  • Page 5 2. DIFFERENCES BY DESTINATION Model Name PC-AX40 Model Name A3PCAX40E A3PCAX40A A3PCAX40G A3PCAX40I A3PCAX40K (Sharp internal name) Version code Destination countries SRSSC (Malasia) SRH (Hong Kong), SEEG (Germany) SEIS (Italy) SEI (Korea) SEA (Austria) SCA (Australia), SBI (India) Main Sepcifications...
  • Page 6 Accessories AC cable None Germany None AC adapter Modem cable None Yes (US) Yes (A-tick) Yes (UK) LAN cable with core None None Core for LAN None None FDD Cable WinMe First Step English German Italian Korean Guide Recovery CD U/A/H/E ver.

  • Page 7: Chapter 3. Trouble Shooting

    CHAPTER 3. TROUBLE SHOOTING 1. Trouble shooting 1. Trouble shooting Start 2. Device problem 3. Power source abnormal 4. Power on problem System work? Device problem 5. Power line problem 6. 3.3V/5V problem Charge problem 7. VTT problem 8. VCC_CORE problem Power on 9.
  • Page 8 2. Device problem Device problem 1 Device problem 2 BIOS ROM 3. Power source abnormal PCMCIA Power source abnormal MEMORY Keyboard Touch pad With AC adapter Insert AC adapter Audio Modem System power on? Remove battery Insert AC adapter USB1,2 Remove AC adapter Insert Battery USB3,4...
  • Page 9 4. Power on problem Power ON problem H8_VDDA = 5V? U16 7pin becomes low by Power SW Check SW1,R504,C505 U10 2pin = LOW? MCU clock OK? Check (U16 2,3pin) SW501,R571,C76,U10 Power line problem Check Check U501,U512,D17,C161 X1,R115,C151,C155 4/30 5. Power line problem Power line problem +3V = 3.3V? 3.3V/5V/12V problem...
  • Page 10 6. 3.3V/5V problem 3.3V/5V/12V problem +3V OK? Change D/D Board +5V OK? Check +12V power line PU501,PD3 +3V_P OK? Change D/D Board Check D/D board, +3V_P power line U502,PQ502 +5V_P OK? PU502,PL3,PR508, PL507,PL509 Check D/D board, Check +3V power line +5V_P power line PU1,PL2,PQ501, PR501,L508,PL510...
  • Page 11 9. Battery charge problem 10. Sheet Battery charge problem Sheet Battery charge problem Battery charge problem Battery level > 95% Battery level > 95% Change battery unit Change battery unit System can charge? System can charge? Check Battery unit Check Battery unit BATT1 >...
  • Page 12 11. Clock problem Clock problem 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 X503 14.318MHz OK? Check X503,R47,C61,C60 HCLK0 66MHz OK? U507 47pin = 2.5V? 48MHz_USB = 48MHz? 48MHz_USBHUB = 48MHz? Check L503,C62,C57,C513 Check R534,R581,U508 Check U508 PCICLK_F = 33MHz? PCLK1394 = 33MHz? PCLKCARD = 33MHz? PCLKLAN = 33MHz?
  • Page 13 13. BIOS problem BIOS ROM SA0-SA18 Works? (High level > 3.0V) Check signal shortage D0-D7 Works? (High level Check BIOSCS# Check BIOS ROM 13/30 14. HDD problem Remove CDROM FFC Still have error? Check FFC, CDROM USB PCB Motor works? J6 41,42pin = 5V? Check HDD,HDD FPC IDE_RST# = low?
  • Page 14 15. LCD problem CRT can display? Check U507 Backlight ON? Check U507 +3V_LCD = 3.3V? +5V_LCD = 5V? FPVDDEN = high? Check U507 +12V_LCD = 12V? Check D8,R248,R43,C38,Q6,R33,Q7, Check U507,J2 R38,C33,Q5,R23,Q4,C26,Q3 +12V = 12V? VPP problem FPVDDEN = high? 16. CRT problem Check R22,D9,R9,C20,Q1,Q2,R10 Check U507...
  • Page 15 17. Keyboard problem 18. Touch pad problem Keyboard Touch pad Touch pad clean? Keyboard is OK? Change Keyboard Clean up Change Touch pad Lock key LED OK? Check U12,R2,R3,R4,J501,J503 Quick Key OK? Check Touch pad Check J1,Quick Key FPC Check FFC between touch pad and M/B Check J4,U16 17/30...
  • Page 16 19. Audio problem Audio Int Speaker works? Head phone works? Check Int Mic works? J10,L515,L516,C570,C582, U24,C243,C237,VR501,L520, L514,C632,R609,Q34,R231, Q35,R622,Q504,U25 Ext Mic works? SPK_OFF = low? Check U510 Check L42,L41,C277,MIC1 Check Speaker,R211,R221,C244, Check R216,R205,J9 J11,L517,L29,C600,C599, C562,R618,R623 U25 1,9pin = 3.3V Check L509 VA = 5V? Check R230,C267,C268 X3 = 24.576MHz?
  • Page 17 20. Modem problem 21. PCMCIA problem Modem PCMCIA System Change MODEM unit supply CARDVCC? Check U23 Change MODEM unit Detect card type? MODEM cable OK? Check RP35,RP36,RP37,R206, Check MODEM cable R583,R227,J504 Check J504,U22 MDC/LAN PCB OK? 21/30 Check MDC/LAN PCB Sound OK ? Check J506,C191,R597,R575,...
  • Page 18 23. LAN problem LAN Detect? Check J3,J4,F2,F3,F4,F5,J7,R187, R188,R192,R193,U21,C212, C206,R189,R194,R178,R179 AVDD = 5V? Check L21,C166,C163,D21 Check U20,L22,OSC1,R166,R165, R156,U18,R178,R505,R191, R183,R181,L24 23/30 24. USB1 problem USB2 USB1 J3 1pin = 5V? J8 1pin = 5V? Check L3,C3,C4,C8,F501 Check L523,C616 USB_OC#0 3.3V? USB_OC#1 3.3V? Check R502,R503 Check R602,R603 USBPD0+,USBPD0- OK?
  • Page 19 25. USB2 problem USB3 USB4 J509 1pin = 5V? J501 1pin = 5V? Check L513,C568,C585, Check L2,C502,C1,F1 F504 USB_OC#2 3.3V? USB_OC#3 3.3V? Check R608,R621 Check R1,R2 USBPD2+,USBPD2- OK? USBPD3+,USBPD3- OK? Check L510,C581,C575 Check L1,C2,C3 25/30 USB HUB problem USB HUB problem 26.
  • Page 20 28. CDROM problem 29. FDD problem CDROM Change CDROM drive Change FDD CD Works? Check CDROM drive FDD works? Change CDROM FFC Bç CD USB PCB Check FDD unit CD Works? 29/30 Check FFC, CD USB PCB Check J510 41,42,43pin = 5V? Check U520,U521,U522,RP509,...
  • Page 55 © COPYRIGHT 2001 BY SHARP CORPORATION All rights reserved. Printed in Japan. No part of this publication may be reproduced, stored in a retrieval system, or transmitted. In any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.