Texas Instruments 51X 6.5.5 , 6.5.6

4. Using a plastic stick, unlock the ZIF connector located near th e

Touchpad and remove the cable from the connector. Also, remove the

2-connector speaker cable from the Main Board Connector.

5. Remove the cable cover below the display by lifting upward on the

front edge of the cover.

6. Disconnect three cables (two to the LCD and one to the LCD/Switch

Board).

7. Rotate the notebook so that the rear of the unit is facing you; open the

rear door assembly.

8. Several recesses are located just above the rear connectors. Use a

small flat-blade screwdriver to dise ngage the snaps associated with

the right and left recesses.

9. Lift and push the Display Assembly forward to disengage it from the

Base Assembly.

10. Replacement of th e Top Case Assembly is the reverse of Steps 1

through 9 above.

6.5.5 Removing/Replacing the Floppy Disk

Assembly

To remove/replace the Floppy Disk Assembly, perform the following

procedure:

1. Remove the Keyboard Assembly and Heat Sink Assembly as described

in Paragraphs 6.5.2 and 6.5.3.

2. Remove the Top Case Assembly as described in Paragraph 6.5.4.

3. Unlock the ZIF connector (using a plastic stick) and remove the Floppy

to Main interface cable from the connector on the Mai n Board.

4. Remove the power supply shield.

5. Remove the screws securing the Floppy Disk Assembly to the Main

Board and remove the Floppy Assembly from the notebook.

6. Remove the front and rear brackets from the Floppy Disk Drive.

7. Reassembly is the reverse of Steps 1 through 6 above.

6.5.6 Removing/Replacing the Hard Drive

The procedure for removing and replacing the Hard Drive assembly is as

follows:

1. Power down the notebook, remove the battery packs, and disconnect

the AC Adapter, if installed.

2. Disconnect any peripheral device interface cables from the external

interface connectors and remove any installed PCMCIA options.

Field Service 6-11

Contents

Main Page Contents Preface 1 General Description 2 Installation 3 Operating Instructions 4 Theory of Operation 5 Troubleshooting Procedures 6 Field Service ASelf Test Error Messages BPC-Doctor Diagnostics Preface Introduction Intended Audience Contents Other Manuals About the System Ordering Parts and Supplies 1 General Description 1.1 1.2 Model 510 Model 515 1.3 Configuration P/N Suffix Configuration P/N Suffix 1.4 Page Figure 1-2 Extensa 51x Series Features 1-4 General Description 1.4.1 1.4.2 1.4.3 n 1.4.3.1 Controls and Indicators ^ 1.4.4 1.4.5 Status LEDs 1.4.6 1.5 1.6 Subassemblies 1.6.1 1.6.2 1.7 Specifications Table 1-3 Extensa 51x Notebook Features Specifications Model 510 Model 515 General Description 1-13 * Weight specifications do not include AC Adapter 1.8 2 Installation 2.1 2.2 n 2.3 c n 2.3.1 Page 2.3.2 2.3.3 2.4 c 2.5 2.5.1 2.5.2 2.5.3 c 2.5.4 2.5.5 2.5.6 2.5.7 2.6 c 2.7 2.8 2.9 2.10 3 Operating Instructions n 3.1 3.2 3.2.1 3.2.2 Status LEDs 3.2.3 3.2.4 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 3.3.8 n 4 Theory of Operation 4.1 4.2 4.2.1 MAIN BOARD Figure 4-1 Notebook Functional Block Diagram 4-2 Theory of Operation 4.2.2 4.2.3 4.2.3.1 External VGA Drive Capability c 4.2.4 c 4.2.5 4.2.6 4.2.7 Page Table 4-4 Primary Battery Pack Specifications Function Specifications 4-8 Theory of Operation 5 Troubleshooting Procedures 5.1 5.2 SEE PARAGRAPH 5.3.3 Figure 5-1 Troubleshooting Flowchart 5-2 Troubleshooting 5.3 5.3.1 (EG. a lamp) to verify that voltage is present. If the voltage is OK, try replacing the AC Adapter 5-4 Troubleshooting MAIN BOARD n 5.3.3 5.3.4 5.3.5 5.3.5.1 Interactive Tests Page 5.3.5.3 Creating a Bootable Floppy Diskette n 5.3.5.4 Running PC-Doctor Page 6 Field Service c 6.1 6.2 6.2.1 c 6.2.2 6.2.3 6.2.4 6.3 c 6.4 and Assemblies 6.4.1 Page 6.4.2 Table 6-2 Base Assembly, Field-Replaceable Units (FRUs) FRU Description Page CRU Description c 6.5 c Replacement Procedures 6.5.1 Pack 6.5.2 n c 6.5.3 6.5.4 6.5.5 Assembly 6.5.6 Hard Drive Cover HDD Release Latches 6.5.7 6.5.8 6.5.9 or Contrast Board c 6.5.10 6.5.11 Control Board 6.5.12 Supply Board Assembly 6.5.13 6.5.14 Page A Self Test Error Messages A.1 Error Messages A-1 Error Message Corrective Action Table A-2 POST Checkpoint List A-2 Error Messages Error Messages A-3 A-4 Error Messages Page B PC-Doctor Diagnostics B.1 B.2 B.3 B.4 B.4.1 B.4.2 n B.4.3 B.4.4 B.4.5 B.5 B.6