Control Card - Removal And Replacement; Control Card Emc Shield - Removal And Replacement; Control Card Button Protector - Removal And Replacement - IBM 4851 514 Planning, Installation And Service Manual

Updated October, 2008
To replace, reverse this procedure.

Control card - removal and replacement

1. Remove the tablet as described in "Display tablet – removing and replacing" on
2. Remove the tablet rear as described in "Display tablet back cover" on page 55.
3. Remove the screws securing the control (button) card ( B in Figure 42).
4. Carefully lift the card from beneath the tab and lift it from the button post.
5. Disconnect the cable from the control card.
Figure 42. Removing the control card
6. To replace, reverse these procedures, noting to position the card on the

Control card EMC shield - removal and replacement

1. Remove the control card as described in "Control card - removal and
2. Remove the screw holding the control card EMC shield ( A in Figure 42).
3. Slide the control card EMC shield to the right and lift to remove.
4. To replace, reverse these procedures.

Control card button protector - removal and replacement

1. Remove the tablet rear as described in "Display tablet back cover" on page 55.
2. Using a flat-bladed screwdriver, press inward on one end-button and lift outward
3. To replace, reverse these procedures, noting to angle the assembly such that
page 55.
alignment pin and align with metal EMC shield.
replacement."
to remove.
the control buttons match the button holes.
Removing and replacing FRUs
Chapter 5. Removing and replacing FRUs
57