Acer Travelmate 4520 Service Guide

							Chapter 331
2.Pull the PC Card dummy card out of its slot.  
Removing the Battery Pack 
1.Turn the unit over with the base facing upward.  
2.Slide the battery lock to the unlock position.
3.Slide and hold the battery release latch, then remove the battery pack from its bay. 
Acer TM 4520 SG.book  Page 31  Friday, June 22, 2007  5:43 PM 
						

							32Chapter 3
Removing the Lower Case Cover  
1.Remove the screws securing the lower case cover. 
2.Pry the lower case cover from the main unit, then remove it.
Removing the Memory Modules      
1.Push out the latches on both sides of the exterior DIMM slot (DM1). 
StepTy p e QuantityColorTo r q u e
1M2 x L8 BZN+NYLOK1Black1.6 kgf-cm +/-15%
M2 x L4 BZN4Black1.6 kgf-cm +/-15%
Acer TM 4520 SG.book  Page 32  Friday, June 22, 2007  5:43 PM 
						

							Chapter 333
2.Remove the memory module from its slot.
3.Repeat steps 1 and 2 to remove the second memory module.
Removing the WLAN Board         
1.Peel off the end of the bar code tape securing the WLAN antennas.
2.Disconnect the antennas from the WLAN board, then move them away from the board. 
Acer TM 4520 SG.book  Page 33  Friday, June 22, 2007  5:43 PM 
						

							34Chapter 3
3.Remove the screws securing the WLAN board. 
4.Remove the WLAN board from its slot (MINIC1).
Removing and Dismantling the HDD Assembly   
1.Use the clear plastic tab and the black mylar tape to disconnect the HDD assembly from its connector 
(SATA). 
StepTy p e QuantityColorTo r q u e
3M2 x L4 BZN+NYLOK2 Silver1.6 kgf-cm +/-15%
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							Chapter 335
2.Remove the HDD assembly from the main unit. 
3.Remove the HDD rubber enclosure from the assembly. 
4.Remove the screws on the HDD module shielding. 
StepTy p e QuantityColorTo r q u e
4M3 x L42 Silver3 kgf-cm +/-15%
Acer TM 4520 SG.book  Page 35  Friday, June 22, 2007  5:43 PM 
						

							36Chapter 3
5.Remove the shielding from the HDD module. 
Removing and Dismantling the ODD Assembly   
1.Remove the screw securing the ODD assembly to the main unit.
2.Use a plastic flat screwdriver to push the ODD assembly out of the main unit.
StepTy p e QuantityColorTo r q u e
1M2.5 x L81Black3 kgf-cm +/-15%
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							Chapter 337
3.Pull the ODD assembly out of its bay.
4.Remove the screws securing the ODD bracket. 
5.Detach the ODD bracket from the module.
StepTy p e QuantityColorTo r q u e
4M3 x L42 Silver3 kgf-cm +/-15%
Acer TM 4520 SG.book  Page 37  Friday, June 22, 2007  5:43 PM 
						

							38Chapter 3
Removing the Processor Cooling Fan          
1.Disconnect the fan cable from its system board connector (FAN1). 
2.Remove the screws securing the cooling fan.
3.Peel off the aluminum tape on the top edge of the cooling fan. 
StepTy p e QuantityColorTo r q u e
2M2 x L4 BZN+NYLOK2Black1.6 kgf-cm +/-15%
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							Chapter 339
4.Remove the cooling fan from the main unit. 
Removing the Heat Sink      
1.Remove the screws securing the heat sink. 
2.Carefully pull the heat sink from the unit base, then remove it from the system board.
StepTy p e QuantityColorTo r q u e
1M2 x L2.5 BZN+NYLOK5 Silver1.6 kgf-cm +/-15%
Acer TM 4520 SG.book  Page 39  Friday, June 22, 2007  5:43 PM 
						

							40Chapter 3
Removing the Processor      
1.Use a flat screwdriver to turn the processor socket lock to the counter-clockwise to the unlock position 
(note the unlock icon).
Torque value:  3 kgf-cm +/-15%
2.Hold the processor by its edges and remove it from its socket (U52).
IMPORTANT:  When installing a processor, note the golden arrow on the corner to make sure the processor is 
properly oriented over the socket. Refer to the figure above. 
Acer TM 4520 SG.book  Page 40  Friday, June 22, 2007  5:43 PM