Acer Extensa 390 Service Guide

4-20Service Guide4.6.8 Disassembling the Top Cover
The touchpad, speakers, audio board are connected to the top cover.  The sections below describe
the removal process of these components.
REMOVING THE HARD DISK DRIVE HEAT SINKPull up to remove the hard disk drive heat sink from the top cover.Figure 4-26Removing the Hard Disk Drive Heat Sink
REMOVING THE AUDIO BOARDPull up to remove the audio board from the top cover.Figure 4-27Removing the Audio Board 

Disassembly and Unit Replacement4-21 REMOVING THE TOUCHPAD1.Remove four screws and lift up the metal plate and touchpad buttons.
2.Unplug the touchpad cable (J1) and remove the touchpad main sensor and connector unit.
REMOVING THE SPEAKERS1.Unlock the speaker by pushing outward on its locks.
2.The flip up the wire that holds the speaker in place and remove the speaker.Figure 4-28Removing the Touchpad and Speakers 

4-22Service Guide4.7 Disassembling the Display
Follow these steps to disassemble the display:
1.Remove the two oval LCD bumpers at the top of the display; use a pointed instrument to
remove the two mylar stickers on the bottom of the display.Figure 4-29Removing the LCD Bumpers
2.Remove four screws on the display bezel.Figure 4-30Removing the Display Bezel ScrewsSTN and TFT LCDs use the same bezel but different panels. 

Disassembly and Unit Replacement4-23 3.Pull out and remove the display bezel by first pulling on the inside of the bezel sides and lower
bezel area.  Then pull up the top bezel area.Figure 4-31Removing the Display Bezel
4.Unplug two connectors and remove the inverter board.Figure 4-32Removing the Inverter Board 

4-24Service Guide5.Remove three screws on the four sides of the display panel (one screw holds and grounds the
LCD cable).  Then tilt the LCD Panel away for the display cover.Figure 4-33Removing the LCD Panel 

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Model Number DefinitionModel Number DefinitionA-1This appendix shows the model number definition of the notebook.
390XX - X X X XBrandT:TI
Keyboard Language Versions:0:Swiss/USG:German
1:US(110V)I:Italian
2:US(220V)J:Japanese
3:US w/o power cordN:Norwegian
4:US K/B w/o power cord(ACLA)R:Russian
5:US(110V for AAB)S:Spanish(220V)
6:US(220V)with CCIB for P.R. ChineseT:Thailand
7:Spanish w/o power cordU:UK(250V)
8:TurkishW:Swedish/Finnish...

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Exploded View DiagramExploded View DiagramThis appendix includes exploded view diagrams of the notebook.
Table B-1Exploded View Diagram ListNo.DescriptionB-1System assemblyB-2CD-ROM Drive assemblyB-3LCD Module assemblyB-4Upper Case assemblyB-5Lower Case assemblyB-6LCD Bezel assembly