Texas Instruments 51X c

cCaution: If the notebook is powered up with the LCD bezel removed,

you can be exposed to high voltages which could result in shock and

equipment damage. Ensure that the batteries and AC adapter are re-

moved from the notebook when working on the LCD/Display assembly.

1. Use a narrow piece of plastic or pointed tweezers to apply light

pressure to one edge of the lower screw covers. The lower screw

covers will bow outward and can be removed.

2. Remove the rubber upper screw covers using a pair of tweezers.

3. Remove the six screws that secure the bezel to the display assembly (a

small Phillips-head screwdriver is recommended for removing the two

screws at the top of the bezel).

4. Pull on the inside edges of the bezel; remove bezel and lay aside for

later reinstallation.

5. Peel back the EMI shield along the right side of the display to expose

the Inverter Board and the Contrast Board.

6. Disconnect the connectors at the top and bottom of the Inverte r Bo ard

and/or Contrast Board.

7. Use the small Phillips-head screwdriver to remove the two screws

holding the Inverter Board or Contrast Board; remove the Board

Assembly.

8. Reinstallation of the Inverter or Contrast Board is the reverse of Steps

1 through 7 above.

6.5.10 Removing/Replacing the Touchpad Assembly

To remove and replace the Touchpad Assembly, perform the following

procedure:

1. Remove the Upper Case Assembly as described in Paragraph 6.5.4.

2. Turn the Upper Case Assembly over and remove the four screws that

secure a metal shield to the plastics.

3. Lift the plastic frame that rests on top of the touchpad.

4. Unplug the flex cable from the connector on the touchpad. Note that

the board connector is a LIF (Low insertion force) type; the cable is

held in place by friction.

5. Slide the board assembly to the right and remove from the unit.

6. Replacement of the Touchpad Board Assembly is essentially the

reverse of Steps 1 through 5 above.

6-14 Field Service

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