Acer Aspire 4920 Service Guide

Chapter 361
Main Unit Disassembly Process
Main Unit Disassembly Flowchart
MAIN UNIT
KEYBOARD
MAIN UNIT DISASSEMBLY
LCD MODULE
Fx4
UPPER CASE
Ax3, Cx11
TOUCHPAD BRACKET
ASSEMBLY
Ax2
CPU HEATSINK
MODULE
Screwx3
LAUNCH
BOARD BRACKET
TOUCHPAD BOARD
CPU
SPEAKERS
Ax4
Ax2
MAINBOARD
Ax1
BLUETOOTH BOARD
USB BOARD
Ax2
MODEM BOARD
RTC BATTERY
MIDDLE COVER
POWER
BOARDAx3MEDIA
BOARD
LAUNCH
BOARDAx3
LOWER CASE
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62Chapter 3
Removing the CPU Heatsink Module
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the Lower Cover” on page 55.
3.Detach the heatsink cable from the mainboard.
4.Loosen the four spring-loaded screws on the heatsink in the order shown. 
5.Remove the heatsink module. Screw List
ScrewPart No.
A M2 x L4 86.00F24.724
C M2 x L6 86.00F58.726
F M2.5 X L8 86.00E34.738
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Chapter 363
Removing the CPU 
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the Lower Cover” on page 55.
3.See “Removing the CPU Heatsink Module” on page 62.
4.Using a flat screwdriver, turn the CPU socket latch to the unlock position by aligning the latch to the unlock 
symbol, then remove the CPU.
NOTE: When installing the CPU, make sure to install the CPU with PIN 1 at the corner as shown. 
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64Chapter 3
Removing the Keyboard
1.See “Removing the Battery Pack” on page 53.
2.Press the plastic flat-blade screwdriver to the notches, shown below, to disengage the keyboard from the 
main unit. 
3.Carefully pry up and out the keyboard and turn it over. 
4.Disconnect the keyboard cable from the mainboard to remove the keyboard.   
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Chapter 365
Removing the Middle Cover
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the Keyboard” on page 64.
3.Open the LCD screen all the way to facilitate the easy removal of the middle cover. 
4.Carefully insert the flat screwdriver between the middle cover and lower case and gently pry up the middle 
cover. 
5.Continue prying the middle cover until the full length of the cover releases from the main unit, then turn it 
over.  
6.Using a plastic flat-blade screwdriver, pry open the...

66Chapter 3
7.Detach the power board cable from the power board, then remove the middle cover. 
Removing the Power Board
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the Keyboard” on page 64.
3.See “Removing the Middle Cover” on page 65.
4.Detach the mylar tape from the launch board. 
5.Remove the three screws (A) from the power board. 
StepSize (Quantity)ColorTo r q u e
1~3 M2 x L4 (3) Black 1.6 kgf-cm
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Chapter 367
6.Remove the power board.
 
Removing the Media Board
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the Keyboard” on page 64.
3.See “Removing the Middle Cover” on page 65.
4.See “Removing the Power Board” on page 66.
5.Insert a flat-blade screwdriver between the media board cover and middle cover and pry up the gently. 
6.Remove the media board cover from the middle cover. 
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68Chapter 3
7.Detach the mylar tape from the media board.
8.Carefully insert the flat-blade screwdriver under the side of the media board cover and gently pry up the 
board until it releases from the cover. 
9.Remove the media board.
Removing the LCD Module
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the Lower Cover” on page 55.
3.See “Removing the Keyboard” on page 64.
4.See “Removing the Middle Cover” on page 65.
5.Disconnect the microphone cable from the mainboard....

Chapter 369
6.Disconnect the LCD coaxial cable from the mainboard.
7.Pull out the antenna cables as shown. 
8.Turn the system over and remove the two screws (F) from the base of the unit. 
StepSize (Quantity)ColorTo r q u e
1~2 M2.5 x L8 (2) Black 4.0 kgf-cm
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70Chapter 3
9.Remove the two screws (F) from the left and right hinge of the LCD module. 
10.Carefully remove the LCD module from the base unit. 
NOTE: Make sure the cables are routed well before connecting the cables back to the unit.
Separating the Upper Case from the Lower Case
1.See “Removing the Battery Pack” on page 53.
2.See “Removing the SD Dummy Card” on page 54.
3.See “Removing the Express Dummy Card” on page 54.
4.See “Removing the Lower Cover” on page 55.
5.See “Removing the DIMM” on page...