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Toshiba A105 S4064 Maintenance Manual - Page 158

Disassembly Procedures, or removed by simply inserting them or pulling them out.

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4 Replacement Procedures Disassembly Procedures The cable connectors come in these two basic types: ? Pressure plate connectors ? Normal pin connectors 4.1 General To remove a pressure plate connector, pull up the tabs on either side of the connector's plastic pressure plate and gently pull the cable out of the connector. To reconnect the cable to the pressure plate's connector, raise the pressure plate up to a satisfactory height and slide the cable into the connector. Secure the cable in the correct position by pressing down the sides of the pressure plate so that the plate is flush with the sides of the connector. Grasp and pull the cable gently to check that the cable is connected firmly. If the cable comes off the connector, reinsert the cable by raising the pressure plate up to a satisfactory height. Normal pin connectors are used for all the other types of cables. These connectors can be installed or removed by simply inserting them or pulling them out. Assembly Procedures You have to reassemble the computer after you have disassembled the computer and fixed the component that caused the problem. When reassembling the computer, keep the following general guidelines in mind: ? Take your time to carry out the suggested instructions completely. Hurried reassembly can often cause problems. ? Check that all the cable and connectors are fastened securely. ? Before securing the FRUs or other parts, check that the cables are not caught by the screws or FRUs. ? Check that all the latches are closed securely. ? Check that all the required screws are used to secure the FRUs. Using wrong screws can damage the threads or heads of the screws or does not ensure that the FRUs are secure. After installing a FRU, make sure that the FRU and computer work normally. 4-6 Satellite A100/A105 / TECRA A7 Maintenance Manual

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 Replacement Procedures

4.1 General

4-6

Satellite A100/A105 / TECRA A7

Maintenance Manual

Disassembly Procedures

The cable connectors come in these two basic types:

Pressure plate connectors

Normal pin connectors

To remove a pressure plate connector, pull up the tabs on either side of the connector's plastic

pressure plate and gently pull the cable out of the connector. To reconnect the cable to the pressure

plate's connector, raise the pressure plate up to a satisfactory height and slide the cable into the

connector. Secure the cable in the correct position by pressing down the sides of the pressure plate

so that the plate is flush with the sides of the connector. Grasp and pull the cable gently to check

that the cable is connected firmly. If the cable comes off the connector, reinsert the cable by raising

the pressure plate up to a satisfactory height.

Normal pin connectors are used for all the other types of cables. These connectors can be installed

or removed by simply inserting them or pulling them out.

Assembly Procedures

You have to reassemble the computer after you have disassembled the computer and fixed the

component that caused the problem.

When reassembling the computer, keep the following general guidelines in mind:

Take your time to carry out the suggested instructions completely. Hurried reassembly can

often cause problems.

Check that all the cable and connectors are fastened securely.

Before securing the FRUs or other parts, check that the cables are not caught by the screws

or FRUs.

Check that all the latches are closed securely.

Check that all the required screws are used to secure the FRUs. Using wrong screws can

damage the threads or heads of the screws or does not ensure that the FRUs are secure.

After installing a FRU, make sure that the FRU and computer work normally.