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Dell™ OptiPlex™ 760 Service Manual

  Heat Sink and Processor

Heat Sink and Processor

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

Removing the Processor

1. Follow the procedures in Working on Your Computer.
   
   
2. Remove the computer cover (see Removing the Computer Cover).
   
   

WARNING: Despite having a plastic shield, the heat sink assembly may be very hot during normal operation. Be sure that it has had sufficient time to cool before you touch it.

3. Remove the optical drive (see Optical Drive).
   
   
4. Loosen the captive screws on each side of the heat sink assembly.
   
   
5. Disconnect the floppy-drive data cable from the system board and release it from the securing tab on the heatsink (see Floppy Drive).
   
   
6. Rotate the heat sink assembly upward, and remove the assembly from the computer.
   Lay the heat sink down on its top, with the thermal grease facing upward.
   
   

1

heat sink assembly

2

captive screws in housing (2)

CAUTION: Unless a new heat sink is required for the new processor, reuse the original heat sink assembly when you replace the processor.

7. Open the processor cover by sliding the release lever from under the center cover latch on the socket. Then, pull the lever back to release the processor.
   
   

1	center cover latch	2	processor cover
3	processor	4	socket
5	release lever

CAUTION: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket.

8. Gently remove the processor from the socket.
   
   

Leave the release lever extended in the release position so that the socket is ready for the new processor.

Installing the Processor

CAUTION: Ground yourself by touching an unpainted metal surface on the back of the computer.

CAUTION: When replacing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket.

1. Follow the procedures in Working on Your Computer.
   
   
2. Remove the computer cover (see Removing the Computer Cover).
   
   
3. If you are installing a new processor, unpack the new processor, being careful not to touch the underside of the processor.
   
   

CAUTION: You must position the processor correctly in the socket to avoid permanent damage to the processor and the computer when you turn on the computer.

4. If the release lever on the socket is not fully extended, move it to that position.
   
   
5. Orient the front and rear alignment-notches on the processor with the front and rear alignment-notches on the socket.
   
   
6. Align the pin-1 corners of the processor and socket.
   
   

1	processor cover	2	tab
3	processor	4	processor socket
5	center cover latch	6	release lever
7	front alignment-notch	8	socket and processor pin-1 indicator
9	rear alignment-notch

CAUTION: To avoid damage, ensure that the processor aligns properly with the socket, and do not use excessive force when you install the processor.

7. Set the processor lightly in the socket and ensure that the processor is positioned correctly.
   
   
8. When the processor is fully seated in the socket, close the processor cover.
   
   

Ensure that the tab on the processor cover is positioned underneath the center cover latch on the socket.

9. Pivot the socket release lever back toward the socket and snap it into place to secure the processor.
   
   
10. Clean the thermal grease from the bottom of the heat sink.
    
    

CAUTION: Ensure that you apply new thermal grease. New thermal grease is critical for ensuring adequate thermal bonding, which is a requirement for optimal processor operation.

11. Apply the new thermal grease to the top of the processor.
    
    
12. Install the heat sink assembly:
    
    
    1. Place the heat sink assembly back onto the heat-sink assembly bracket.
       
       
    2. Rotate the heat sink assembly down towards the computer base and tighten the two captive screws.
       
       

CAUTION: Ensure that the heat sink is correctly seated and secure.

1	heat sink assembly	2	heat-sink assembly bracket
3	captive screw in housing (2)

13. Route the floppy drive cable through the securing tab on the heat sink and connect it to the system board.
    
    
14. Replace the optical drive (see Optical Drive).
    
    
15. Replace the computer cover (see Replacing the Computer Cover).
    
    

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