Acer Aspire 7740 Service Guide

							Chapter 345
3.Detach the black cable from connector 1 and the white cable from connector 2 on the WLAN card.
4.Remove the one screw (F) on the WLAN card and detach the card. 
Size (Quantity)ColorTo r q u ePart No.
M2 x L4 (1) Silver 1.6 kgf-cm 86.9A552.4R0 
						

							46Chapter 3
5.Remove the wireless LAN card. 
Removing the DIMM Module
1.See “Removing the Battery Pack” on page 40.
2.See “Removing the Back Cover” on page 42.
3.Push out the latches on both sides of the DIMM socket to release the DIMM.  
						

							Chapter 347
4.Remove the DIMM module(s).  
						

							48Chapter 3
Main Unit Disassembly Process
Main Unit Disassembly Flowchart
ItemScrewColorPart No.
A M2.5 x L6 Black 86.00E12.536
B M2.5 x L10 Black 86.00F84.73A
C M2.5 x L4 Black 86.00H59.734
D M2.5 x L3.5 Silver 86.9A563.3R5
F M2 x L4 Silver 86.9A552.4R0
G M2 x L3 Silver 86.9A522.3R0
MAIN UNIT
MAIN UNIT DISASSEMBLY
HEATSINK
MODULE
CPUSCREW x 7
MIDDLE COVER
C x 3
KEYBOARD
LCD MODULE
A x 2 , B x 4
MAIN
BOARD G x 2UPPER CASE
A x 1 6 , C x 2
TOUCHPAD
BASEBOARD
F x 2
TOUCHPAD
MODULE
MODEM
CARD F x 2F x 2 , D x 1BLUETOOTH
BOARDUSB
BOARD C x 1
LEFT
SPEAKER F x 2
MICROPHONE
RIGHT
SPEAKER C x 2 
						

							Chapter 349
Removing the Heatsink Module
NOTE: There are two version of heatsink module. For this section, we are going to use the Discrete model. 
The UMA version looks like the picture below:
1.See “Removing the Battery Pack” on page 40.
2.See “Removing the Back Cover” on page 42.
3.Disconnect the heatsink connector from its connector on the main board.  
						

							50Chapter 3
4.Loosen the seven screws securing the heatsink module in the order shown.
5.Carefully lift up the heatsink module.  
						

							Chapter 351
Removing the CPU 
1.See “Removing the Battery Pack” on page 40.
2.See “Removing the Back Cover” on page 42.
3.See “Removing the Heatsink Module” on page 49.
4.Using a flat screwdriver, turn the CPU socket latch counter-clockwise to release the CPU. 
5.Lift up carefully to remove the CPU.  
						

							52Chapter 3
NOTE: When installing the CPU, make sure to install the CPU with Pin 1 at the corner as shown.  
						

							Chapter 353
Removing the Middle Cover
1.See “Removing the Battery Pack” on page 40.
2.Remove the three screws (C) on the back cover. 
3.Carefully pry loose the middle cover and remove it from the system.   
Removing the Keyboard
1.See “Removing the Battery Pack” on page 40.
2.See “Removing the Middle Cover” on page 53.
Size (Quantity)ColorTo r q u ePart No.
M2.5 x L4 (3) Black 3.0 kgf-cm 86.00H59.734 
						

							54Chapter 3
3.Release the keyboard from the latches and turn it over on the palmrest area.