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Replacing Fans

Dell Studio XPS™ 435T/9000 Service Manual

  Replacing the Chassis Fan

  Replacing the Processor Fan and Heat Sink Assembly

  Replacing the Front Fan

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.

Replacing the Chassis Fan

CAUTION: Do not touch the fan blades when you are removing the chassis fan. This could damage the fan.

1. Follow the procedures in Before You Begin.
   
   
2. Remove the computer cover (see Replacing the Computer Cover).
   
   
3. Disconnect the chassis fan cable from the fan connector (SYSFAN1) on the system board (see System Board Components).
   
   
4. Remove the four screws securing the chassis fan.
   
   
5. Lift the chassis fan away from the computer.
   

   1

   chassis fan cable

   2

   screws (4)

   
   
   

6. To replace the chassis fan, slide it in place towards the back of the computer.
   
   
7. Replace the four screws that secure the chassis fan.
   
   
8. Connect the chassis fan cable to the fan connector (SYSFAN1) on the system board (see System Board Components).
   
   
9. Replace the computer cover (see Replacing the Computer Cover).
   
   

Replacing the Processor Fan and Heat Sink Assembly

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

CAUTION: The processor fan and heat sink assembly is a single unit. Do not try to remove the fan separately.

1. Follow the procedures in Before You Begin.
   
   
2. Remove the computer cover (see Replacing the Computer Cover).
   
   
3. Disconnect the processor fan cable from the connector (CPUFAN1) on the system board (see System Board Components).
   
   
4. Carefully move away any cables that are routed over the processor fan and heat sink assembly.
   
   

CAUTION: To ensure maximum cooling for the processor, do not touch the heat transfer areas on the processor heat sink. The oils in your skin can reduce the heat transfer capability of the thermal pads.

5. Loosen the four captive screws securing the processor fan and heat sink assembly.
   
   

CAUTION: When you remove the processor fan and heat sink assembly, lay it upside down or on its side to avoid damaging the heat sink thermal interface.

6. Lift the processor fan and heat sink assembly out of the computer, and set it aside.
   
   

1	processor fan and heat sink assembly	2	processor fan and heat sink assembly cable
3	captive screws (4)

NOTE: The processor fan and heat sink assembly in your computer may not look exactly as shown in the illustration above.

7. To replace the processor fan and heat sink assembly, 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.

8. Apply new thermal grease to the top of the processor.
   
   
9. Align the four captive screws on the processor fan and heat sink assembly with the holes on the system board.
   
   
10. Tighten the four captive screws that secure the processor fan and heat sink assembly.
    
    

NOTE: Ensure that the processor fan and heat sink assembly is correctly seated and secure.

11. Connect the processor fan and heat sink assembly cable to the connector (CPUFAN1) on the system board (see System Board Components).
    
    
12. Replace the computer cover (see Replacing the Computer Cover).
    
    
13. Connect your computer and devices to electrical outlets, and turn them on.
    
    

Replacing the Front Fan

CAUTION: Do not touch the fan blades when you are removing the front fan. This could damage the fan.

1. Follow the procedures in Before You Begin.
   
   
2. Remove the computer cover (see Replacing the Computer Cover).
   
   
3. Disconnect the fan cable from the fan connector (SYSFAN2) on the system board (see System Board Components).
   
   
4. Press the tabs and pull the fan away from the front of the computer.
   
   
5. Lift the fan out of the computer, and set it aside.
   
   

1	tabs (2)	2	front fan
3	front fan cable

6. To replace the fan follow the steps in reverse order.
   
   

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