Acer Extensa 660 Maintenance Manual

							Field Service    6-17
6.5.7 Removing/Replacing the Heat Sink Assembly
The procedure for removing and replacing the Heat Sink Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the four screws securing the Heat Sink Assembly to the Main Board 
and carefully lift the Heat Sink Assembly from the base assembly.
5.Replacement is the reverse of Steps 1 through 4.
Figure 6-11  Removing/Replacing the Heat Sink Assembly
Keyboard AssemblyHeat Sink
Assembly 
						

							6-18   Field Service 
6.5.8 Removing/Replacing the CPU PWB Assembly
The procedure for removing and replacing the CPU PWB Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
Caution: Avoid touching the CPU as the CPU pins bend easily.
5.Carefully remove the CPU PWB exercising caution not to damage the CPU 
pins.
6.Replace using the reverse of Steps 1 through 5. (Note: When installing a 
replacement CPU PWB assembly, add thermal grease to the bottom of the 
Heat Sink Assembly where it comes in contact with the CPU).
Figure 6-12  Removing/Replacing the CPU PWB Assembly
CPU PWB
Assembly
Heat Sink
Assembly
Keyboard
Assembly
Main PWB
Assembly 
						

							Field Service    6-19
6.5.9 Removing/Replacing the Display Assembly
The procedure for removing and replacing the Display Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove four screws from the face of the LCD cover and pull the covers apart 
starting at the top of the Display (refer to Figure 6-13).
4.Remove the single screw holding the FPC Cable and gently remove the cable 
connector (CN1) from the LCD Transfer Board.
5.Remove five screws (3 on left hinge and 2 on the right hinge) and remove the 
Cover -Display Assembly from the Base Assembly.
6.Replacement is the reverse of Steps 1 through 5.
Figure 6-13  Removing/Replacing the Display Assembly 
						

							6-20   Field Service 
6.5.10 Removing/Replacing the Top Cover Assembly
The procedure for removing and replacing the Top Cover Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Turn the unit over and remove five recessed screws from the bottom of the 
base assembly. Also remove two screws from the primary battery 
compartment and two screws from the Hard Disk Drive compartment.
7.Turn the assembly to normal position and unsnap the base cover from the 
top cover by pulling gently up along both sides and along the front until the 
top cover unsnaps from the base cover assembly.
8.Unplug the cable connectors from the top cover PWB assemblies (LED Board, 
Glidepad, and speakers) and remove the top cover assembly.
9.Reassembly is the reverse of Steps 1 through 8.  Note: Ensure that the Close 
Cover Switch cap is installed before reassembling the Top Cover Assembly.
Figure 6-14  Removing/Replacing the Top Cover Assembly
Top Cover
Assembly
Heat Sink
Assembly Keyboard
Assembly
Bottom
Case
Assembly 
						

							Field Service    6-21
6.5.11 Removing/Replacing the LED PWB Assembly
The procedure for removing and replacing the LED PWB Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7.Remove two screws and remove the LED PWB from the Top Cover Assembly.
8.Reassembly is the reverse of Steps 1 through 7.
Figure 6-15  Removing/Replacing the LED PWB Assembly
Top Cover
Assembly
LED Board
Assembly 
						

							6-22   Field Service 
6.5.12 Removing/Replacing the Glidepad Assembly
The procedure for removing and replacing the Glidepad Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7.Turn the top cover over and locate the Glidepad PWB; disconnect cable 
connectors CN21 and CN22 from the Main PWB assembly.
8.Remove the six screws securing the Glidepad module and PWB to the cover 
and remove these assemblies.
9.Reassembly is the reverse of Steps 1 through 8.
Figure 6-16  Removing/Replacing the Glidepad Assembly 
						

							Field Service    6-23
6.5.13 Removing/Replacing the Power Supply PWB Assembly
The procedure for removing and replacing the Power Supply PWB Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7.Remove the screw securing the power Supply PWB to the Main PWB and 
remove the Power Supply PWB.
8.Reassembly is the reverse of Steps 1 through 7.
Figure 6-17  Removing/Replacing the Power Supply PWB Assembly
CN4
CN6 CN28 
						

							6-24   Field Service 
6.5.14 Removing/Replacing the Audio PWB Assembly
The procedure for removing and replacing the Power Supply PWB Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7.Remove two screws securing the Audio PWB to the Main PWB and disconnect 
three connectors (CN15, CN27 and CN28). Remove the PWB from the unit.
8.Reassembly is the reverse of Steps 1 through 7.
Figure 6-18  Removing/Replacing the Audio PWB Assembly 
						

							Field Service    6-25
6.5.15 Removing/Replacing the Main PWB Assembly
The procedure for removing and replacing the Power Supply PWB Assembly is as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7.Remove all PWB assemblies from the Main PWB Assembly and install on the 
replacement Main PWB Assembly.
8.Remove the three large posts (one visible, one under the Power Supply PWB 
and one under the Battery and HDD Transfer PWB). Note and record the 
location and size of hex screws (posts) for use during reassembly.
9.Remove the four screws and carefully remove the Main PWB Assembly.
10.Reassembly is the reverse of Steps 1 through 9.
Figure 6-19  Removing/Replacing the Main PWB Assembly
Bottom
Case
Assembly
Main PWB
Assembly 
						

							6-26   Field Service 
6.5.16 Removing/Replacing the Battery/HDD Transfer PWB 
Assembly
The procedure for removing and replacing the Battery/HDD Transfer PWB Assembly is 
as follows:
1.Turn off the computer; disconnect the AC power adapter (if attached), and 
remove the battery packs as described in Paragraphs 6.5.1 and 6.5.2.
2.Press the Cover Release Latch and open the notebook to a full 180 degree 
position.
3.Remove the Keyboard Assembly as described in Paragraph 6.5.6.
4.Remove the Heat Sink Assembly as described in Paragraph 6.5.7.
5.Remove the Cover -Display Assembly as described in Paragraph 6.5.9.
6.Remove the Top Cover Assembly as described in Paragraph 6.5.10.
7.Remove the three holding screws and remove the Battery/HDD Transfer PWB 
Assembly.
8.Replacement is the reverse of Steps 1 through 7.
Figure 6-20  Removing/Replacing the Battery/HDD Transfer PWB Assembly
Battery/HDD
Board