Dell Inspiron Small Desktop (3646, Mid 2014) - Manual (Page 21)

Procedure
CAUTION: Incorrect alignment of the fan and heat-sink assembly can
damage the system board and processor.
1 Place the fan on the heat-sink assembly as shown in the figure.
2 Align the screw holes on the fan with the slots on the heat-sink assembly.
1 screws (4) 2 fan
3 fan cable 4 optical-drive data cable
5 optical-drive power cable
3 Replace the screws that secure the fan to the heat-sink assembly on the
system board.
4 Connect the power and data cables to the connectors on the optical
drive.
5 Connect the fan cable to the system board connector (FANC1).
For more information on the location of the fan connector, see “System-
Board Components” .
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