7-38 170 Series Monitor Revision C
2000947-004
Serviceable Assemblies: Replacing the Membrane Switch Panel
Procedure
1. Disconnect the AC adapter from the monitor to completely remove power.
2. Follow the instructions for “Removing the Monitor Top Cover” on page 7-19.
3. Unscrew the top cover standoff and set aside. You may need a wrench to
loosen the standoff.
4. Remove the two display board bracket screws. Set aside the display board and
screws.
5. Remove the screw fastening the membrane shield tongue. Set aside the screw.
6. Remove the rear panel plug in
J4 and set aside.
7. Newer monitors have top covers with tabs which fit into corresponding slots in
the bottom enclosure. (Refer to Figure 7-12 and Figure 7-13.) If you are
installing a newer tabbed top cover onto an older bottom enclosure (without
slots), you must remove the tabs. Use a small hand file or other tool to remove
the plastic tabs.
8. Apply the new membrane switch panel: peel off the adhesive backing and
position on the new top cover making sure the shield tongue is threaded through
the slot.
IMPORTANT
SHIELD TONGUE—If the shield tongue is caught between the
top cover and the switch panel, the panel cannot be properly
positioned.
9. Screw the shield tongue in place using the old screw.
10. Replace the display board and secure all four screws.
11. Replace the top cover standoff.
12. Install the rear panel gasket on the inside of the cover: remove the adhesive
backing and align over the rear panel connectors.
13. Install the display overlay: remove the adhesive backing and align on the
outside of the top cover.
14. Install the rear panel label on the outside of the cover: remove the adhesive
backing and align over the rear panel connectors.
15. Re-connect the display board and membrane switch panel cables to J18 and J19
on the main board.
16. If you are installing a tabbed cover onto a bottom slotted enclosure, ensure that
the tabs align with the slots.
17. Secure the top cover with the four bottom panel screws.
18. Discard previous top cover assembly.
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