Apple Technical ProceduresPowerBook 100Section 6 – International Take-Aparto CONTENTS 6.3 Introduction 6.3 Things to Remember 6.3 Materials Required 6.4 Daughterboard 6.6 Motherboard 6.8 Top Cover and Cable Cover 6.10 Display Bezel 6.12 LCD (Display) IMPORTANT U.S. and international service strategies for PowerBook computers differ. U.S. domestic service providers should not use the information in this section; instead refer to Section 2, Take-Apart. Note Detailed instructions for underlined steps are located in Section 2, Take-Apart and elsewhere in this section. o INTRODUCTION Be sure to read the "Things to Remember" section prior to beginning Take-Apart. This section contains important information necessary to preventing damage to the PowerBook 100.Things to • Prior to removing or replacing modules within the Remember PowerBook 100, unplug the AC adapter, remove the main battery, remove the backup batteries, and move the storage switch to the off position.CAUTION Use the Macintosh Shut Down command to shut down the PowerBook 100 before beginning Take-Apart. Otherwise, all RAM contents will be lost.• When you are unwrapping, installing, or replacing modules, observe the appropriate ESD precautions. The PowerBook 100 makes extensive use of low-power complementary metal oxide semiconductor (CMOS) devices. These devices are very susceptible to damage from electrostatic discharge (ESD). Take preventive measures to avoid ESD damage. For complete information on ESD prevention and workstation setup, refer to You Oughta Know.• Avoid excessive handling of the bottom cover and display housing and, if possible, wash your hands prior to working with these items. The interior of the bottom cover and display housing have a special coating inside to reduce electromagnetic interference emanating from the computer. Skin oils can damage this coating.Materials Required #2 Phillips screwdriver #1 Phillips screwdriver #0 Phillips screwdriver Flat-blade screwdriver Needlenose pliers Grounded workstation pad Grounding wriststrapo DaughterBoardRemove 1. Remove the backup batteries. 2. Remove the main battery.3. Remove the display assembly.4. Remove the keyboard. 5. Figure 6-1. Locate daughterboard connectors J318 and J319, which join the daughterboard and motherboard. Grip the daughterboard near these connectors and lift it off the motherboard. To disconnect J318, you may need to gently rock the connector from end to end as you lift.Replace Figure 6-1. Position the daughterboard so that its connectors J318 and J319 mate with motherboard connectors J18 and J19. Gently push down on the daughterboard until the connectors fully join.Figure 6-1 Removing the Daughterboardo MOTHERBOARDRemove 1. Remove the backup batteries. 2. Remove the backup batteries door. 3. Remove the main battery.4. Remove the display assembly.5. Remove the keyboard.6. Remove the palm rest cover.7. Remove the trackball assembly.8. Remove the hard disk assembly.9. If the motherboard carries a RAM expansion board, remove the RAM expansion board as described in Section 5, Additional Procedures.10. Remove the modem shield. If the motherboard carries an internal modem board, remove the internal modem. Section 5, Additional Procedures, describes how to remove the modem and modem shield.11. Remove the daughterboard.12. Figure 6-2. Using a #1 Phillips screwdriver, remove the five screws that hold the motherboard in place.13. Figure 6-2. Lift the motherboard near the hard disk drive connector J8 and slide the board toward you and out of the bottom cover.Replace Figure 6-2. Place the back edge of the motherboard (the side with the external connectors) into the bottom cover, about one inch away from the back panel. Slide the motherboard toward the back panel until you can lower the front edge of the board into the bottom cover. Notice that the motherboard screw near the backup batteries door does not have a washer.Figure 6-2 Removing the Motherboardo TOP COVER AND CABLE COVERRemove 1. Remove the display assembly.2. Lay the display assembly flat on its back, so the display screen faces up.3. Figure 6-3. Using a #2 Phillips screwdriver, remove the four mounting screws that join the top cover and display.4. Figure 6-3. Lift off the two clutch plates.5. Figure 6-3. Slide off the two clutch covers. You may need to lift the top cover before the clutch cover will slide freely.6. Figure 6-3. Pry back the speaker locking tabs and lift out the speaker.7. Figure 6-3. Locate the cable cover locking tabs and release the tabs by squeezing the outside of the cable cover near the tabs.8. To free the top cover, slip the interconnect cable and speaker through the top cover.Replace When you replace the four #2 Phillips screws, thread all four screws half way; then tighten all four screws. It is easier to start the screws into the threads when none of the screws is tight. Position the speaker so that the soldered wire terminals are closest to the cable cover.Figure 6-3 Removing the Top Cover and Cable Covero DISPLAY BEZELRemove 1. Remove the display assembly.2. Remove the top cover and cable cover.3. Remove the brightness and contrast knobs.4. Figure 6-4A. Using a small flat-blade screwdriver, pry out the two rubber plugs that conceal the display bezel screws.5. Figure 6-4A. Using a #0 Phillips screwdriver, remove the two display bezel screws.6. Figure 6-4A. On each side of the display, use a small flat-blade screwdriver to pry the display bezel away from the metal clutch assembly. Pry until the locking tab closest to the clutch assembly releases.7. Figure 6-4A. Using your thumb and index finger, pull the display bezel toward you until the side locking tabs disengage.8. Lift off the bezel.Replace 1. Figure 6-4B. Locking tabs on all sides of the bezel mate with tabs on the display housing. Lay the bezel flat in the unlocked position. In the unlocked position, the top of the bezel should rest just below the top of the display housing. The seam between the bezel and the housing should be tight and uniform. 2. Slide the bezel toward the top of the display housing until the bezel snaps into place. Verify that the seam is uniform on all sides. If the bottom center locking tab is not seated, push down on the bezel until the locking tab snaps into position. 3. If the bezel screws are difficult to install, push the bottom of the bezel near the screw hole until the bezel screw hole aligns properly. While holding the bezel in position, install the screw.Figure 6-4 Removing and Replacing the Display Bezelo LCD (DISPLAY)Remove 1. Remove the display assembly.2. Remove the top cover and cable cover.3. Remove the brightness and contrast knobs.4. Remove the display bezel.5. Figure 6-5A. Remove the #1 Phillips screw that holds the display shield in place (this screw is one of the two screws that holds the inverter board in place). Lift off the display shield. 6. Figure 6-5A. Remove the remaining #1 Phillips screw that holds the inverter board in place.7. Figure 6-5A. Remove the #1 Phillips screw that holds the interconnect board in place.8. Figure 6-5A. Remove the four #1 Phillips screws that hold the display in place.9. Figure 6-5B. Move the interconnect cable and speaker away from the display. Gently rotate the display forward so that it rests face-down on the ESD mat. The interconnect board, the inverter board, and the related cables will rotate forward with the display, so move the assembly gently to avoid stressing any of these components.10. Figure 6-5B. Pull the brightness/contrast flex cable out of the connector on the interconnect board.11. Figure 6-5B. Pull the display flex cable out of the connector on the interconnect board.12. Rotate the inverter board toward you, unlatch the cable connector on the end of the two-wire display lamp cable, and disconnect the display lamp cable connector from the inverter board. WARNING Do not try to disconnect the lamp cable before removing the inverter board. To free the lamp cable, you must release a locking tab on the inverter board connector. Figure 6-5 Removing the LCD DisplayReplace Carefully press the display lamp wires into the channels in the display housing. Notice that the blue insulator on the interconnect-board end of the brightness/contrast cable should face the surface of the interconnect board.¬ @ ˇ ˇˇˇˇ @