Acer Aspire 4315 Service Guide

							Chapter 351
4.Remove the lower cover from the lower case. 
Removing the DIMM 
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Lower Cover” on page 50.
3.Push out the latches on both sides of the DIMM socket to release the DIMM. 
4.Remove the DIMM module.  
						

							52Chapter 3
Removing the WLAN Board Module
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Lower Cover” on page 50.
3.Disconnect the antenna cable from the WLAN board, then move the antenna away from the board. 
4.Remove the two screws (A) on the WLAN board to release the WLAN board.   
5.Detach the WLAN board from the WLAN socket. 
NOTE:  When attaching the antennas back to the WLAN board, make sure the cable is routed properly. 
StepSize (Quantity)ColorTo r q u e
1~2 M2 x L4 (2) Black 1.6 kgf-cm 
						

							Chapter 353
Removing the Hard Disk Drive Module 
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Lower Cover” on page 50.
3.Remove the screw (A) securing the HDD assembly to the unit.    
4.Pull the HDD module out by pulling on the mylar attached to it (1), gently slide-out the HDD module from 
its bay (2). 
NOTE:  To prevent damage to device, avoid pressing down on it or placing heavy objects on top of it. 
5.Remove the two screws (B) on the HDD bracket.  
StepSize (Quantity)ColorTo r q u e
1 M2 x L4 (1) Silver 1.6 kgf-cm
StepSize (Quantity)ColorTo r q u e
1~2 M3 x L4 (2) Silver 3.0 kgf-cm 
						

							54Chapter 3
6.Remove the hard disk drive. 
Removing the Optical Drive Module
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Lower Cover” on page 50.
3.Remove the screw (C) on the bottom side of the unit, as shown. 
4.Using the flat-blade screwdriver, press the end of the module forward, then slide out the optical drive 
module from the main unit.   
StepSize (Quantity)ColorTo r q u e
1 M2 x L6 (1) Black 2.0 kgf-cm 
						

							Chapter 355
5.Remove the two screws (E) securing the optical bracket and remove the locker bracket from the optical 
disk drive module.   
StepSize (Quantity)ColorTo r q u e
1-2 M2 x L2.5 (2) Silver 1.6 kgf-cm 
						

							56Chapter 3
Main Unit Disassembly Process
Main Unit Disassembly Flowchart 
						

							Chapter 357
Removing the CPU Heatsink Module
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Lower Cover” on page 50.
3.Detach the heatsink cable from the mainboard.
4.Loosen the four spring-loaded screws on the heatsink in the order shown.  Screw List
Screw SizePart No.
A M2 x L4 86.00F24.724
C M2 x L6 86.00F58.726
D M2 x L8 86.00D75.220
F M2.5 X L8 86.00E34.738
I N/A 86.00E92.724 
						

							58Chapter 3
5.Remove the heatsink module.
Removing the CPU 
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Lower Cover” on page 50.
3.See “Removing the CPU Heatsink Module” on page 57.
4.Using a flat-blade 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.  
						

							Chapter 359
Removing the Keyboard
1.See “Removing the Battery Pack” on page 49.
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.    
						

							60Chapter 3
Removing the Middle Cover
1.See “Removing the Battery Pack” on page 49.
2.See “Removing the Keyboard” on page 59.
3.Open the LCD screen all the way to facilitate the easy removal of the middle cover. 
4.Carefully insert the flat-blade 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 remove 
the cover.