w w w . d e l l . c o m | s u p p o r t . d e l l . c o m0C1553A01CAUTION: A CAUTION indicates a potential for property damage, personalinjury, or death.Removing the Back Fan AssemblyCAUTION: Only trained service technicians are authorized to remove the systemcover and access any of the components inside the system. See your SystemInformation Guide for complete information about safety precautions, workinginside the computer, and protecting against electrostatic discharge.1 Remove the system cover.See your Installation and Troubleshooting Guide for detailed information.2 Remove the cooling shroud.a Remove the cables from the cooling shroud's retaining clips.b Loosen the two thumbscrews securing the cooling shroud to the system.c Lift the cooling shroud up to clear the memory riser cards and the chassis.See your Installation and Troubleshooting Guide for detailed information.3 Remove the memory riser cards by grasping each card by the extractor tabs, located onthe top corners of the card, and lifting it straight up to clear the chassis.See your Installation and Troubleshooting Guide for detailed information.4 Remove the four fans by squeezing the fan release levers and lifting each fan straightup to clear the fan assembly (see Figure 1).F i g u r e 1 . R e m o v i n g / R e p l a c i n g a Fa nrelease leverApril 2003C1553eb1.fm Page 1 Friday, April 4, 2003 12:29 PM