Dell Precision 5540 Service Manual - Page 30

Installing the Fans, Heat sink assembly, Removing the Heatsink

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Installing the Fans 1. Perform the following steps to install the system fan: a. Align the screw holes on the left fan with the screw holes on the palm-rest assembly. b. Connect the left fan cable to the system board. c. Route the display cable through the routing guides on the left fan. d. Replace the M2x4 (2) screws that secure the left fan to the system board. e. Align the right fan to the system board. f. Route the touch-screen cable through the routing guides on the right fan. g. Connect the touch-screen cable to the system board. h. Connect the fan cable to the connector to the system board. i. Replace the Mylar tape that secures the cable to the system board j. Align the metal brackets that secure touch-screen cable and DisplayPort Over Type-C cable. k. Replace the M2x4 (2) screws that secure the metal brackets and right fan to the system board. a. Install the Base cover 2. Follow the procedures in After Working Inside Your Computer. Heat sink assembly Removing the Heatsink 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the: CAUTION: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch. 30 Disassembly and reassembly

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Installing the Fans
1.
Perform the following steps to install the system fan:
a.
Align the screw holes on the left fan with the screw holes on the palm-rest assembly.
b.
Connect the left fan cable to the system board.
c.
Route the display cable through the routing guides on the left fan.
d.
Replace the M2x4 (2) screws that secure the left fan to the system board.
e.
Align the right fan to the system board.
f.
Route the touch-screen cable through the routing guides on the right fan.
g.
Connect the touch-screen cable to the system board.
h.
Connect the fan cable to the connector to the system board.
i.
Replace the Mylar tape that secures the cable to the system board
j.
Align the metal brackets that secure touch-screen cable and DisplayPort Over Type-C cable.
k.
Replace the M2x4 (2) screws that secure the metal brackets and right fan to the system board.
a.
Install the
Base cover
2.
Follow the procedures in
After Working Inside Your Computer
.
Heat sink assembly
Removing the Heatsink
1.
Follow the procedures in
Before Working Inside Your Computer
.
2.
Remove the:
CAUTION:
The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool
before you touch.
30
Disassembly and reassembly