1 Hardware Overview
1.12 Power Supply
1.12 Power Supply
The power supply supplies many different voltages to the system board and performs the
following functions:
1.
Checks power input to determine:
Whether the AC adaptor is connected to the computer.
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Whether the battery pack is installed and supplying power.
2.
Checks power supply’s internal controls:
Battery pack charging: start, stop and voltage supplied to the battery pack.
Power supply system: Power supplied from a DC power source (AC adaptor).
Faulty power supply: Executes forced shutdown if needed.
Logic: Power supply to various circuits
Charging current to PWM control IC for battery pack charging
3.
Controls the following aspects of the logic system
Power supply to gate arrays
Power on/off
4.
Indicates the following:
DC IN (sets LED to orange or blue)
Battery icon (sets LED to orange or blue)
Faulty power supply by low battery
5.
Interface for the following:
BIOS via EC/KBC
Function mode of power supply
6.
Detects the following:
Input voltage to logic system
Input voltage, overvoltage and input/output to battery pack
Battery pack’s internal temperature
Input voltage to DC power supply (output from AC adaptor)
The power supply output rating is specified in Table 1-11.
1-32
Satellite A40 Maintenance Manual (960-458)
Summary of Contents for Satellite A40 Series
Page 10: ...x Satellite A40 Maintenance Manual 960 458 ...
Page 11: ...Chapter 1 Hardware Overview ...
Page 12: ...1 Hardware Overview 1 ii Satellite A40 Maintenance Manual 960 458 ...
Page 51: ...Chapter 2 Troubleshooting Procedures ...
Page 52: ...2 Troubleshooting Procedures 2 ii Satellite A40 Maintenance Manual 960 458 ...
Page 56: ...2 Troubleshooting Procedures 2 vi Satellite A40 Maintenance Manual 960 458 ...
Page 118: ...Chapter 3 Tests and Diagnostics ...
Page 119: ...3 Tests and Diagnostics 3 ii Satellite A40 Maintenance Manual 960 458 ...
Page 204: ...Chapter 4 Replacement Procedures ...
Page 205: ...4 Replacement Procedures 4 ii Satellite A40 Maintenance Manual 960 458 ...
Page 358: ...Appendices ...
Page 359: ...Appendices App ii Satellite A40 Maintenance Manual 960 458 ...
Page 365: ...Appendices App viii Satellite A40 Maintenance Manual 960 458 ...
Page 371: ...Appendices Appendix A Handling the LCD Module A 6 Satellite A40 Maintenance Manual 960 458 ...
Page 411: ...Appendices Appendix E Key Layout E 4 Satellite A40 Maintenance Manual 960 458 ...
Page 413: ...Appendices Appendix F Wiring Diagrams F 2 Satellite A40 Maintenance Manual 960 458 ...
Page 415: ...Appendices Appendix G BIOS Rewrite Procedures G 2 Satellite A40 Maintenance Manual 960 458 ...
Page 417: ...Appendices Appendix H EC KBC Rewrite Procedures H 2 Satellite A40 Maintenance Manual 960 458 ...
Page 419: ...Appendices Appendix I Reliability I 2 Satellite A40 Maintenance Manual 960 458 ...