Replacing the heatsink and processor (Models 743, C43, E43, 783, E83,
784, C84, and E84 only)
To remove the heatsink and processor:
1. Follow the steps in “Replacing the processor fan (Models 743, C43, E43, 783,
E83, 784, C84, and E84 only)” on page 44 to remove the processor fan.
2. Completely loosen the four spring screws holding down the heatsink to remove
the heatsink.
3. Press down on the processor latch, and move it sideways and up to unlock it.
4. Pivot open the processor cover.
5. Lift out the processor, carefully keeping your fingers on each side of the module.
To replace the processor and heatsink, reverse the previous steps.
Replacing the control switch card
To remove the control switch card:
1. Follow the steps in “Removing the front bezel” on page 31 to remove the front
bezel.
2. Remove the two screws on the front of the card that are holding the card in
place.
3. Pull the card from the unit.
4. Disconnect the cable that is attached to the card connector.
To replace the control switch card, reverse the previous steps.
Replacing the front lock
To remove the front lock:
1. Follow the steps in “Removing the pullout tray” on page 37 to slide the pullout
tray halfway out of the unit frame.
2. Remove the lock lever from the back of the lock.
3. Remove the clip from the front of the lock.
4. Slide the lock out of the lock bracket.
5. Remove the screw that attaches the lock bracket to the inside of the pullout tray
and remove the lock bracket.
To replace front lock, reverse the previous steps.
Chapter 2. Removal and replacement procedures 45
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