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Toshiba P25 manual Removing the system board screws and cables

Models: P25

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4 Replacement Procedures

4.20 System Board

7.Remove the three M2.5⋅6 screws securing the system board to the computer chassis.

8.Detach the following five cables from the system board:

•Right-side speaker cable

•Direct play LED FPC cable

•CIR FFC cable

•Direct play button FFC

•Audio board FFC cable

Fig 4-35: Removing the system board screws and cables

4-60	Satellite P20 Series Maintenance Manual

Image 176

Toshiba P25 manual Removing the system board screws and cables

Contents

Toshiba Corporation Trademarks CopyrightDisclaimer Safety Precautions PrefaceSatellite P20-25 Series Maintenance Manual Conventions AcronymsSatellite P20-25 Series Maintenance Manual Table of Contents Tests and Diagnostics Replacement Procedures CPU HDDAppendices Hardware Overview Hardware Overview Chapter Contents Hardware Overview Features Features Hardware OverviewHardware Overview Features Features Hardware Overview Hardware Overview Features System Unit System Unit Hardware OverviewHardware Overview System Unit AUX 2.5-inch Hard Disk Drive Hardware Overview Removable Drives1 3.5-inch Floppy Disk Drive Removable DrivesRemovable Drives Hardware Overview DVD-R/-RW Drive Read speedsDVD-ROM Drive Matsushita SR-8177 256 Kbytes Max Toshiba SD-C2612DVD Multi-Drive Combo Drive CD-RWPower Supply Hardware Overview Power SupplyPower Supply Hardware Overview LB2Hardware Overview Batteries Main BatteryBatteries Satellite P20-25 Series Maintenance Manual RTC battery Status TimeBatteries Hardware Overview Chapter Troubleshooting Procedures Troubleshooting Procedures Chapter Contents Figures TablesTroubleshooting Introduction Troubleshooting Introduction Troubleshooting ProceduresTroubleshooting Flowchart Troubleshooting Procedures Troubleshooting FlowchartTroubleshooting Flowchart Troubleshooting Procedures Troubleshooting flowchart 1/2Troubleshooting flowchart 2/2 Troubleshooting Flowchart Troubleshooting Procedures Troubleshooting Procedures Troubleshooting Flowchart Power Supply Troubleshooting Power Supply Troubleshooting Troubleshooting ProceduresTroubleshooting Procedures Power Supply Troubleshooting Procedure 1 Power Status CheckBattery LED Battery State LED colors DefinitionProcedure 2 Adaptor / battery replacement AC-IN LEDBattery Procedure 3 Power supply connection checkProcedure 4 Diagnostic check Procedure 5 Replacement checkDisplay Troubleshooting Troubleshooting Procedures Display TroubleshootingProcedure 2 Diagnostic check Display Troubleshooting Troubleshooting ProceduresProcedure 1 External display check Procedure 3 Connector and replacement check FDD Troubleshooting FDD Troubleshooting Troubleshooting ProceduresProcedure 3 Connector check and replacement check Troubleshooting Procedures FDD TroubleshootingProcedure 1 FDD head cleaning check Keyboard Troubleshooting Keyboard Troubleshooting Troubleshooting ProceduresTroubleshooting Procedures Keyboard Troubleshooting Procedure 1 External keyboard checkExternal USB Devices Troubleshooting External USB device troubleshooting processProcedure 1 External device and connection check Procedure 2 Replace system boardTV-Out Failure Troubleshooting TV-Out Failure Troubleshooting Troubleshooting ProceduresProcedure 2 TV set check Troubleshooting Procedures TV-Out Failure TroubleshootingProcedure 1 TV connection check Printer Port Troubleshooting Printer Port Troubleshooting Troubleshooting ProceduresTroubleshooting Procedures Printer Port Troubleshooting Procedure 1 Diagnostic checkProcedure 2 Printer port loopback check Procedure 3 Replace system boardTouchPad Troubleshooting Touch Pad Troubleshooting Troubleshooting ProceduresProcedure 2 TouchPad replacement check Troubleshooting Procedures TouchPad TroubleshootingProcedure 1 TouchPad connection check Speaker Troubleshooting Speaker Troubleshooting Troubleshooting ProceduresTroubleshooting Procedures Speaker Troubleshooting Procedure 1 Audio source testProcedure 2 Earphone test Procedure 3 Connection checkOptical Drive Troubleshooting Optical Drive Troubleshooting Troubleshooting ProceduresTroubleshooting Procedures Optical Drive Troubleshooting Procedure 1 Audio CD checkProcedure 2 Drive cleaning check ProcedureProcedure 5 Connection check and replacement check Modem Troubleshooting Troubleshooting Procedures Modem TroubleshootingModem Troubleshooting Troubleshooting Procedures Procedure 1 Telephone line connection checkProcedure 2 Modem card connection check Procedure 3 Modem replacement checkPcmcia Troubleshooting Troubleshooting Procedures Pcmcia TroubleshootingProcedure 2 Pcmcia socket replacement check Pcmcia Troubleshooting Troubleshooting ProceduresProcedure 1 Sycard test Ieee 1394 Troubleshooting Troubleshooting Procedures Ieee 1394 TroubleshootingProcedure 3 Connection and replacement check Ieee 1394 Troubleshooting Troubleshooting ProceduresProcedure 1 Ieee 1394 device check Wireless LAN Troubleshooting Troubleshooting Procedures Wireless LAN TroubleshootingWireless LAN Troubleshooting Troubleshooting Procedures Procedure 2 Connector and replacement checkBluetooth Troubleshooting Troubleshooting Procedures Bluetooth TroubleshootingBluetooth Troubleshooting Troubleshooting Procedures Troubleshooting Procedures Bluetooth Troubleshooting Chapter Tests and Diagnostics Tests and Diagnostics Contents Tests and Diagnostics Diagnostic Test Diagnostic Test Tests and DiagnosticsExecuting the Diagnostic Test Tests and Diagnostics Executing the Diagnostic TestExecuting the Diagnostic Test3. Tests and Diagnostics Tests and Diagnostics Executing the Diagnostic Test Executing the Diagnostic Test Tests and Diagnostics Config Check Test Tests and Diagnostics Config Check TestDMI Check Test Tests and Diagnostics DMI Check TestTests and Diagnostics PIO Loopback Test PIO Loopback TestIeee 1394 Test Tests and Diagnostics Ieee 1394 TestTests and Diagnostics Speaker Audio Test Speaker Audio TestFan ON/OFF Test Tests and Diagnostics Fan ON/OFF TestMain Battery Charge Test Tests and Diagnostics Main Battery Change TestFDD Test Tests and Diagnostics FDD TestTests and Diagnostics CD-ROM Test CD-ROM TestKeyboard Test Tests and Diagnostics Keyboard TestTests and Diagnostics Keyboard Test Keyboard Test Tests and Diagnostics Tests and Diagnostics Mouse Pad Test Mouse Pad TestMouse Pad Test Tests and Diagnostics LCD Pixels Mode Test Tests and Diagnostics LCD Pixels Mode TestLid Switch Test Lid Switch Test Tests and DiagnosticsTests and Diagnostics HDD R/W Test HDD R/W TestHDD R/W Test Tests and Diagnostics Tests and Diagnostics LAN Test LAN TestLAN Test Tests and Diagnostics Tests and Diagnostics RTC Test RTC TestCD Control Button Test Tests and Diagnostics CD Control Button TestTests and Diagnostics RTC Test Chapter Replacement Procedures Replacement Procedures General Replacement Procedures General Replacement Procedures GeneralReplacement Procedures General Safety Precautions Before You Begin Disassembly Procedures Assembly ProceduresTools and Equipment Battery Battery Replacement ProceduresRemoving the Battery Pack Removing the battery packReplacement Procedures Battery Installing the Battery PackPC Card Replacement Procedures PC CardRemoving a PC Card Pressing the eject buttonReplacement Procedures PC Card Removing the PC CardInstalling the PC Card Replacement Procedures Removable modules Removable modulesRemovable modules Replacement Procedures Removing the Main ModuleUnlock the main module bay lock Removing the main moduleInstalling the Main Module Engage the main module bay latch lockOptical Drive Replacement Procedures Optical DriveDisassembling the Optical Drive Removing the bracket screwsReplacement Procedures Optical Drive Reassembling the Optical Drive Replacement Procedures TV Tuner TV TunerDisassembling the TV Tuner Remove seven M2⋅8 screws securing the TV tuner caseSecure the lid of the TV tuner case with seven M2⋅8 screws TV Tuner Replacement ProceduresReassembling the TV Tuner Replacement Procedures Removable HDD Removable HDDDisassembling the Removable HDD Opening the removable HDD containerRemovable HDD Replacement Procedures Removing the HDD case screwsReplacement Procedures Removable HDD Reassembling the Removable HDD Replacement Procedures Removable FDD Removable FDDDisassembling the Removable FDD Removing the FDD bracket screwsRemovable FDD Replacement Procedures Reassembling the Removable FDDWireless LAN Unit Replacement Procedures Wireless LAN UnitRemoving the Wireless LAN Unit Lift off the wireless LAN compartment coverWireless LAN Unit Replacement Procedures 11 Removing the wireless LAN unitInstalling the Wireless LAN Unit Expansion Memory Replacement Procedures Expansion MemoryRemoving the Expansion Memory 12 Removing the expansion memory coverReplacement Procedures Expansion Memory 13 Removing the expansion memoryInstalling the Expansion Memory Modem / Bluetooth Unit Replacement Procedures Modem / Bluetooth UnitRemoving the Modem / Bluetooth Unit 14 Removing the modem / Bluetooth unit coverModem / Bluetooth Unit Replacement Procedures 15 Removing the modem / Bluetooth unit screwsInstalling the Modem / Bluetooth Unit 12 CPU Replacement Procedures 12 CPURemoving the CPU 16 Removing the CPU compartment coverReplacement Procedures 12 CPU 17 Removing the heat sink18 Removing the CPU Installing the CPU 13 HDD Replacement Procedures 13 HDD19 Removing the HDD unit cover screws Replacement Procedures 13 HDDRemoving the HDD 21 Removing the aluminum HDD shielding and connector 20 Removing the HDD unit case screwsInstalling the HDD Keyboard Replacement Procedures KeyboardRemoving the Keyboard Open the display panel23 Removing keyboard cable and keyboard Replacement Procedures KeyboardRemove two M2.5⋅3 silver screws securing the keyboard Installing the Keyboard TOP Cover Replacement Procedures Top CoverRemoving the Top Cover Remove the keyboard, HDD and main moduleReplacement Procedures TOP Cover 25 Removing the screws from the computer undersideInstalling the Top Cover Replacement Procedures Function Key Board Function Key BoardRemoving the Function Key Board Remove the keyboard, HDD, main module and top coverFunction Key Board Replacement Procedures Installing the Function Key BoardLED / Power Button Board Replacement Procedures LED / Power Button BoardRemoving the LED / Power Button Board 27 Removing the LED/power button boardLED / Power Button Board Replacement Procedures Installing the LED / Power Button BoardReplacement Procedures TouchPad TouchPadRemoving the TouchPad 28 Removing the TouchPad button boardTouchPad Replacement Procedures Installing the TouchPadDisplay Assembly Replacement Procedures Display AssemblyRemoving the Display Assembly 29 Removing the wireless LAN compartment cover31 Removing the hinge cover Display Assembly Replacement Procedures30 Removing the wireless LAN compartment cover Replacement Procedures Display Assembly Installing the Display Assembly Removing the System Board Replacement Procedures System BoardSystem Board System Board Replacement Procedures Remove the four hexagonal port screws34 Removing the hexagonal port screws Remove the low I/O cover35 Removing the system board screws and cables Installing the System Board Seat the system board and secure with three M2.5⋅6 screwsReplacement Procedures Direct Play Button Board 36 Removing the Direct Play cover assemblyDirect Play Button Board Removing the Direct Play Button BoardDirect Play Button Board Replacement Procedures Installing the Direct Play Button BoardReplacement Procedures CIR Board CIR BoardRemoving the CIR Board 37 Removing the CIR boardCIR Board Replacement Procedures Installing the CIR BoardReplacement Procedures Direct play LED board Direct play LED boardRemoving the Direct Play LED Board 38 Removing the direct play LED boardSecure the direct play LED FPC to the system board Direct play LED board Replacement ProceduresInstalling the Direct Play LED Board Replacement Procedures Audio Board Audio BoardRemoving the Audio Board 39 Removing the audio board screwsAudio Board Replacement Procedures Installing the Audio BoardReplacement Procedures Speakers SpeakersRemoving the Speakers 40 Removing the speaker screws41 Removing the speakers Speakers Replacement ProceduresRemove two M2.5⋅4 screws securing each speaker Installing the Speakers Fan Set Replacement Procedures Fan SetRemoving the Fan Set 42 Removing the inner chassis fan screwsReplacement Procedures Fan Set 43 Removing the outer chassis fan screwsInstalling the Fan Set Replacement Procedures Display Mask Display MaskRemoving the Display Mask 44 Removing the display mask screwsDisplay Mask Replacement Procedures Installing the Display MaskReplacement Procedures FL Inverter Board FL Inverter BoardRemoving the FL Inverter Board 45 Removing the FL inverter boardFL Inverter Board Replacement Procedures Installing the FL Inverter BoardReplacement Procedures LCD Module LCD ModuleRemoving the LCD Module 46 Removing the LCD modulePull out LCD cable from LCD connector 47 Removing the LCD cableInstalling the LCD Module Secure LCD cable with one M2.5⋅4 screwAppendices Appendices Appendix Contents Figure B.1 System Board FRDSY* Bottom View Table D-7 App-vi Precautions for handling the LCD module Appendix a Handling the LCD ModuleCRT Satellite P20-25 Series Maintenance Manual Satellite P20-25 Series Maintenance Manual Satellite P20-25 Series Maintenance Manual Satellite P20-25 Series Maintenance Manual Appendix B Board Layout System Board FRDSY* Bottom ViewSystem Board FRDSY* Top View Figure B-2 System board FRDSY* layout TopTable B-1 System board ICs and connectors top and bottom Mark Number NameTable B-2 System board ICs and connectors top and bottom PCN1System Board JP24/JP26 Sodimm I/F 144-pin Table C-1 Sodimm I/F pin assignments 144-pin 1/4Table C-1 Sodimm I/F pin assignments 144-pin 2/4 Table C-1 Sodimm I/F pin assignments 144-pin 3/4 Table C-1 Sodimm I/F pin assignments 144-pin 4/4 JP1 LCD I/F 40-pin Table C-2 LCD I/F pin assignments 40-pinJP15 RGB I/F 15-pin Table C-3 RGB I/F pin assignments 15-pinJP34 HDD I/F 44-pin Table C-4 HDD I/F pin assignments 44-pinJP28 Main Module I/F 60-pin Table C-5 CD-ROM I/F pin assignments 50-pinJP29 Second Module I/F 60-pin JP14 Parallel I/F 25-pin Table C-6 Parallel I/F pin assignments 25-pinJP21 PC Card I/F 150-pin Table C-7 PC Card I/F pin assignments 154-pin 1/3Table C-7 PC Card I/F pin assignments 154-pin 2/3 S2 IORD#Table C-7 PC Card I/F pin assignments 154-pin 3/3 JP27 Mini PCI I/F 124-pin Table C-8 Mini PCI I/F pin assignments 124-pin 1/2Table C-8 Mini PCI I/F pin assignments 124-pin1/2 Microphone 6-pin AC Adaptor Connector 3-pin---Find Power Team10 JP22, JP23, JP25 Fan I/F 3-pin Headphone Connector 6-pin Table C-12 Headphone Connector pin assignments 6-pinSatellite P20-25 Series Maintenance Manual Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes set 1 and set 2 1/4Table D-1 Scan codes set 1 and set 2 2/4 Table D-1 Scan codes set 1 and set 2 3/4 ALT RTable D-1 Scan codes set 1 and set 2 4/4 Table D-2 Scan codes with left Shift key Table D-3 Scan codes in Numlock mode Table D-4 Scan codes with Fn keyTable D-5 Scan codes in overlay mode Table D-6 No.124 key scan codeTable D-7 No.126 key scan code United States US Keyboard United Kingdom UK KeyboardSpanish SP Keyboard Japanese JA KeyboardKorean KO Keyboard Figure E-3 KO keyboardSatellite P20 Series Maintenance Manual Appendix F Series Screw Torque List Table F-1 Series Screw Torque ListMDC to MB User KEY FPC Bluetooth to MB UP Hinge Cover Satellite P20-25 Series Maintenance Manual Appendix G Reliability Table G-1 MtbfSatellite P20 Series Maintenance Manual