Mute button is too recessed & poorly designed. Please tell me how to disassemble this remote so I can replace button with a proper tactile switch. Conductive-rubber original switches are designed for...
Sorry but what you ask is impractical and maybe impossible.
Conductive rubber membrane switches generally work well, but they do allow oils in sweat and especially from food residues on the hands to pass through over time. On the reverse these oils eventually form an insulating fatty grease which prevent contact, but by carefully dismantling the remote (most of which are not designed to be dismantled, so you'll have to work out how to do this for yourself) the grease can be cleaned off. Most remotes are secured by both screws and plastic clips, you'll have to use a bit of common sense to work out how to dismantle and a plastic case opener to avoid damage to the plastic remote casing.Noter that as you work, if there's a part which won't come apart with gentle persuasion, then there's either a hidden screw which you have missed or a glued section, or sometimes a one way plastic clip which is not intended to ever be unfastened and which must be cut or broken..
I use a piece of paper towel soaked with car brake cleaner on the back of the membrane and if that fails I even wash the membrane in hot soapy water, but it needs to be thoroughly dried out overnight before re-use. I also use the paper towel and brake cleaner on the contact surface of the pcb, but go very sparingly with the brake cleaner as on some designs it can strip the insulating lacquer off the pcb. I try to use it only on the contact surfaces. Usually this fixes the failed contacts immediately and makes them as good as new, but sometimes I need to dismantle and repeat the work if the remote was very gummed up. If you use this method you can cut a suitable sized piece of rubber from perhaps a pencil eraser and superglue it atop the mute button to give it a higher profile.
If you're determined to make the modification you describe, then you're on your own as it's totally non-standard and not recommended. But you'll need to start by finding a suitable miniature non-latching switch designed for pcb surface mounting. Many are designed for light duty only, so you'll need to find one designed for more than occasional operation. Next, drill two holes through the pcb contacts which were formerly operated by the rubber membrane. You then need to thoroughly clean the contacts back to bright metal and then use a soldering iron to tin them. Tin the switch contacts and then insert the contacts through the holes. The low profile of the switch means that there is very unlikely to be the space to solder the switch from the front, so you may have to apply the soldering iron to the opposite side of the board where the contact pass through. This side usually has no solderable tracks, so you just have to be skilled enough to apply sufficient heat to the contacts to melt the solder on the opposite side without frying the switch. You could even drill the holes larger than needed to accommodate a very short piece of fine diameter copper conductor to pass through the hole and so give a solderable surface on the rear. If you succeed in this difficult task then you now need to take the contact membrane and either cut out the original mute button and fabricate some kind of protruding switch top for yourself, or partially hollow out the rear of the mute button to provide an accurate location recess for the top of the new switch. The membrane need to be in close contact with the new switch without pressing down on it whilst at rest, so expect a bit of trial and error. You may still need to build up the front of the button as described earlier.
If you've worked carefully, accurately, and have chosen the correct switch then you'll have achieved your aims. If you make a single mistake then you'll have irreversibly damaged your remote control. Like I said, it's a non-standard and non-recommended modification. Note that many of the miniature switches you'll be offered have the same internal construction to the one which you're trying to replace, although there's often a supplementary metal spring to assist with the action.
Mar 09, 2011 |
Sony RMYD014 Remote Control