Sharp PN-80TC3 Operation Manual page 68

Mounting Precautions (For SHARP dealers and service engineers)
nRemoving the Tray
Back of the tray
(2)
(1) Pinch the locking tabs (4 places)
nAttaching the speaker covers
Speaker cover attachment screws (M3)
If you will use the monitor in a portrait orientation, the speaker cover is not used.
nRemoving the tray mount fitting
If you will use the monitor in a portrait orientation or will otherwise not use the tray, remove the tray mount fitting.
68
E