User manual YAMAHA A47

[. . . ] These precautions include, but are not limited to, the following: Finish ● Handling and Maintenance • Do not place vinyl, plastic or rubber objects on the device, since this might discolor the panel. • When cleaning the device, use a dry and soft cloth. Do not use paint thinners, solvents, cleaning fluids, or chemical-impregnated wiping cloths. • Condensation can occur in the device due to rapid, drastic changes in ambient temperature-when the device is moved from one location to another, or air conditioning is turned on or off, for example. [. . . ] • Be sure to observe the amplifier’s rated load impedance (see SPECIFICATIONS), particularly when connecting speakers in parallel. Connecting an impedance load outside the amplifier’s rated range can damage the amplifier. • ABOUT THE PROTECTION CIRCUIT This speaker system has an internal protection circuit that shuts off the speaker unit when an excessive input signal is applied. If the speaker unit emits no sound, reduce the volume level of the amplifier immediately. The sound will return automatically in several seconds. • Do not swing the speaker by its strap. • Do not place the speaker face down with the grille attached, as deformation of the grille may result. • When placing the speaker face down, always place it on a flat and smooth surface. • Do not touch the speaker driver unit. Dimensions (Speaker only) Net Weight (Speaker only, 1 piece) Cutout Size Required ceiling board thickness Conduit Tube Packaging Location • Do not place the device in an unstable position where it might accidentally fall over. • Do not place the device in a location where it may come into contact with corrosive gases or salt air. • Construction work should be carried out in accordance with constructionrelated law and always by a professional constructor. NOTE If you use a circular cutter, set the diameter with the cutout template. Be careful to prevent chips or powder entering your eyes while cutting the hole. Euroblock connector Power amplifier Speaker Screw 3 Turn the screwdriver a half turn counterclockwise to loosen the attachment screw. This makes the clamp easier to align in the channel. 4 FIX THE SPEAKERS ONTO THE CEILING 1 Attach the safety wire to the safety wire ring, and connect the wire to an independent support point, such as a joist. 2 INSTALL THE TILE RAILS AND O-RING 1 Insert the two tile rails through the cut hole and place them on the ceiling surface within your reach. Be sure that each tile rails are oriented as shown below. 2 Insert the folded O-ring through the cut hole and open it in the ceiling. 3 Secure the O-ring and tile rails with supplied two screws through either slot of both O-ring brackets. Paralleling Input Terminals For this method, cables are connected to terminals 2 and 3 of each speaker. Since the cables are connected via Euroblock connectors, subsequent speakers can work even if a problem occurs with a speaker. 4 Turn the screwdriver clockwise to tighten the attachment screw. The first turn of the attachment screw aligns the clamp with the channel. Further turns move the clamp down the channel to pull the speaker up into the ceiling. Safety wire ring Clamp From amplifier or previous speakers To subsequent speakers To subsequent speakers Euroblock connector Power amplifier CAUTION Always take measures to prevent the speaker falling down. If the safety wire is too short, prepare another wire appropriate for the speaker weight and installation conditions. [. . . ] If the wire is too long, should the speaker fall, the wire may break as a result of too much strain. 2 Push up the speaker slowly into the ceiling, taking care not to trap the cable. CAUTION • Do not over-tighten the attachment screw. Otherwise, the attachment screw and clamp will break. • Do not turn any screws that do not have a guide sleeve in the screw hole. [. . . ]