Dell Precision 330 - Manual (Page 51)

l Replacing the microprocessor cooling fan
Removing the Microprocessor Cooling Fan (Mini Tower Chassis)
1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover .
2. Rotate the power supply away from the system board.
3. Remove the airflow shroud .
4. Disconnect the fan power cable from its connector on the system board (FAN). To locate this connector, see " System Board Components " or " Interior Service
Label ."
5. Gently pull the plastic locking tab back, and push the fan toward the right side of the chassis to disengage the four anchor tabs holding the fan to the back
chassis wall.
Removing the Microprocessor Cooling Fan (Mini Tower Chassis)
6. Lift the fan out of the chassis.
Replacing the Microprocessor Cooling Fan (Mini Tower Chassis)
To replace the microprocessor cooling fan, perform the removal procedure in reverse.
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CAUTION: Before you perform this procedure, see " Precautionary Measures ."
NOTICE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby power indicator on the
system board has turned off. To locate this indicator, see " System Board Components " or " Interior Service Label ."