Proxima ASA 4100/4200 - Manual (Page 72)

Maintenance 5-5
Push
Tab
Push
Tab
Figure 5-6 Removing the top panel
3 Pull the noise filter out.
Figure 5-7 Removing the noise filter
4 Rinse the filter, dry it, and replace it.
5 Replace the top cover (starting at the rear of the projector engaging the
two tabs at the rear first, then working forward) and front panels to
complete the installation. Be sure to reattach the ribbon cable on the
front panel and tighten the two Phillips (crosspoint) screws that hold the
front panel in place.