On/off switch soldering help for a "taken apart" mp3 player.

Hi all,

So i'm currently trying to do one of the instructables right now, which calls for taking apart an mp3 player and (in my particular case) unsoldering the on/off switch and replacing it with another switch (an SPDT switch). The trouble is, I've never messed around with something like this before, so I'm not really sure what I'm looking at. I'm wondering if anyone more experienced with electronics/soldering would be able to help me out.

I just want to know what I'd have to unsolder to get the switch off of the board, and if there are any suggestions as to what to expect when it comes off. Looking at it up front there seems to be two metal solder points on either side of the switch, and three small flat rectangular metal things sticking out from the side opposite of the switch itself. I'm not sure if those are soldered or what they do. Can someone help me?

Picture of On/off switch soldering help for a "taken apart" mp3 player.
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Ive been working on the same instructable recently and was wondering if you figured out clearly how to do this step!
mrbenku (author)  Porcelain TARDIS4 years ago
So it turned out that the mp3 player I got could automatically play whatever files were currently on the mp3 as soon as it turned on. So I just left the switch in the "on" position and cut the wire (the red wire in the picture) and connect both ends to the SPDT lever switch. So when the box opened the mp3 player turned "on".
Thank you so much! If mine doesnt do that, Id have to leave it on the file and solder to the play button correct?

Tardis, did you ever figure yours out? I'm doing the same project right now and my mp3 player doesn't have an on/off switch. I'm following the instructable line by line and about ready to start this step. My power button is actually holding the play button down...will this affect my box when someone goes to open it?

mrbenku (author) 6 years ago
Ok I realized that I could just snip the red wire (it was the power source) and connect my switch to that instead while leaving the switch on the on button. Did the same thing.

thanks for the help anyways!
Re-design6 years ago
It appears to me that the 4 lugs on the sides are common connections to the frame of the switch. Maybe considered ground. the three lugs off the side are switched connections and may work with the common connection.
Libahunt6 years ago
Some additional information would be helpful.

1) How does the current swich work? (For example on my player the turn on/turn off position is non-permanent - some spring pushes the switch back to neutral position. And on the opposite direction there is a (permanent) "lock buttons" position.)
2) Which instructable are You following? If the switch is another type, You might meet more trouble, better to let it be foreseen now by people answering here.
3) Can You upload an image of the other side of the board? Just in case someone smarter comes around and is able to tell everything if the routes of all connections would be visible.

The four connections on the left and right side seem to be ground connections, but they probably might be there just to hold the switch in place. Three connections on the top seem to be the real connections, but the switch probably has two functions (three positions). Which means it already is SPDT.
mrbenku (author)  Libahunt6 years ago
1) I believe the current switch is as you described a "permanent "lock buttons" position switch. ie. You slide it on and it stays in that position until you slide it down and it stays in the off position.

2) The instructables I'm following right now is this one: https://www.instructables.com/id/Legend-of-Zelda-Treasure-chest-with-sound/step6/Adding-electronics-and-lining-the-inside/

I pretty much had to find an mp3 player that would suit my needs (play a file automatically when turned on) and this was the closest one I could find. I pretty much want to replace the on/off slide switch with an SPDT lever switch (there's a picture of it on the instructables link)

3) I've attached an image of the other side of the board. Hope that helps.

And thanks again! :)
photo (1).JPG