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Toshiba A105 S4064 Maintenance Manual - Page 157

Before You Begin

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4.1 General 4 Replacement Procedures Before You Begin Before you begin to disassembly the computer, keep in mind the precautions and advice in this section. Always begin disassembly by removing the AC adapter and battery pack. Remove the optional parts and accessories as well. The procedures for removing the batteries will be explained later. Disassemble the computer only when an abnormality has occurred. Use only the recommended tools. To run and store the computer, be sure to prepare a working environment that is free from: ? Dust and contaminants ? Static electricity ? Extremely high or low temperatures and extremely high humidity Run the diagnostic tests explained in Chapter 2 of this manual to identify the FRU that has probably caused the system failure. Perform only the required machine operations. Use only the disassembly and reinstallation procedures described in this manual. Place the removed components in a safe place away from the computer so that they are not damaged or get in the way of you doing your work. Normally, a number of screws need to be removed or replaced during disassembling. Place the removed screws in a safe place so that you can easily find the right screws for the right components. When assembling the computer, use the specified screws to fasten the parts to the specified locations. See the appropriate explanations and figures for screw sizes. To avoid personal injury, use care to handle components that have sharp edges or corners. After you have replaced a FRU, check that the FRU works correctly to ensure normal computer operation. Satellite A100/A105 / TECRA A7 Maintenance Manual 4-5

Section	Page
Toshiba Personal Computer Satellite A100/A105 TECRA A7 (PSAA8/PSAA9) (PTA70/PTA71) (PSAAx) Maintenance Manual	1
Table of Contents	7
Chapter 1 Hardware Overview	15
1.1 Features	19
1.2 System Unit Components	27
1.3 2.5-inch HDD	33
1.4 DVD-ROM Drive	34
1.5 CD-RW/DVD-ROM Drive	35
1.6 DVD Super Multi (+-R Double Layer)	36
1.7 Power Supply	37
1.8 Batteries	38
Chapter 2 Troubleshooting	40
2.1 Outline	44
2.2 Basic Flowchart	45
2.3 Power Supply	49
2.4 System Board	52
2.5 2.5-inch HDD	55
2.6 Keyboard	60
2.7 Display	61
2.8 ODD (Optical Disk Drive)	63
2.9 LAN	65
2.10 SD/MS/MS pro/MMC/XD Card(Optional)	66
2.11 Finger Print(Optional)	67
2.12 3D Sensor	68
2.13 Parallel Port(Optional)	69
2.14 Audio Test	70
2.15 IEEE 1394 Test	71
2.16 Cooling Module	72
Chapter 3 Diagnostic Programs	73
3.1 General	77
3.2 Quick Start	79
3.3 Options	99
3.4 Subtests	109
3.5 System Test	112
3.6 Memory Test	116
3.7 Storage	122
3.8 Video	126
3.9 Communication (COMM)	135
3.10 Peripheral	137
3.11 Error Codes and description	139
3.12 Quick Test Item List	145
Chapter 4 Replacement Procedures	146
4.1 General	153
4.2 HDD	175
4.3 Speaker Cover and Keyboard	178
4.4 Bluetooth Card	180
4.5 Wireless LAN Card	182
4.6 ODD Bay Module	184
4.7 Display Assembly	187
4.8 Top Cover	189
4.9 CPU Cooling Module and Fan	192
4.10 VGA Board (for VGA Board Model)	197
4.11 CPU	199
4.12 USB Board, Finger Print Board and Print Board	202
4.13 System Board, MIC cable, AC-IN cable	204
4.14 Display Mask	206
4.15 FL Inverter Board	208
4.16 LCD Modules	210
4.17 Speakers	213
4.18 Switch Cover and Switch Board	214
4.19 Touch Pad and Button Board	218
Appendices	222
Appendix A Handling the LCD Module	230
Appendix B Board Layout	235
Appendix C Pin Assignments	239
Appendix D Keyboard Scan/Character Codes	269
Appendix E Key Layout	277
Appendix F BIOS Rewrite Procedures	291
Appendix G EC/KBC Rewrite Procedures	292

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4.1 General

4 Replacement Procedures

Satellite A100/A105 / TECRA A7

Maintenance Manual

4-5

Before You Begin

Before you begin to disassembly the computer, keep in mind the precautions and advice in this

section. Always begin disassembly by removing the AC adapter and battery pack. Remove the

optional parts and accessories as well. The procedures for removing the batteries will be explained

later.

Disassemble the computer only when an abnormality has occurred.

Use only the recommended tools.

To run and store the computer, be sure to prepare a working environment that is free from:

Dust and contaminants

Static electricity

Extremely high or low temperatures and extremely high humidity

Run the diagnostic tests explained in Chapter 2 of this manual to identify the FRU that has probably

caused the system failure.

Perform only the required machine operations. Use only the disassembly and reinstallation

procedures described in this manual.

Place the removed components in a safe place away from the computer so that they are not

damaged or get in the way of you doing your work.

Normally, a number of screws need to be removed or replaced during disassembling. Place the

removed screws in a safe place so that you can easily find the right screws for the right components.

When assembling the computer, use the specified screws to fasten the parts to the specified

locations. See the appropriate explanations and figures for screw sizes.

To avoid personal injury, use care to handle components that have sharp edges or corners.

After you have replaced a FRU, check that the FRU works correctly to ensure normal computer

operation.