How to replace wire on light sensor?

[mikezang]

I have a lot light sensors and wires connectors, maybe it is too old, I found the wire core is exposed as in picture, I want to replace this wire to a new wire, how can I do? What can I open bottom plate and what tool to be used?

Does any expert give some suggestion to repair it?

[Saberwing40k]

While you could replace the sensor wire, there's honestly no point. It would most likely be cheaper and easier to buy a new one of off Bricklink.

[weavil]

Did that with a cable like that with the same problem. I think 22 gauge wire is what size it was, but it had a thin coating. As long as it fits in the ends without force. I used a super small flat screwdriver, but if you can use 2 while holding the piece you should be able to open it. But when you close it put a flat tile on top and use channel-lock pliers.

[aol000xw]

I had exaclty that problem with all my mindstorms cables. It was easy to remove. I am still lookng for a suitable cable (gauge/coating thickness) but it is easy to fix and way cheaper than a new sensor.

[weavil]

I had the stuff already, so it cost me nothing. You could try Radio Shack or hobby/RC shop for the wire, online or retail for real cheap.

[mikezang]

  On 9/27/2013 at 9:25 PM, weavil said:

I had the stuff already, so it cost me nothing. You could try Radio Shack or hobby/RC shop for the wire, online or retail for real cheap.

Can you tell me or show me how to open back? Though I once opened a 9v motor, but never tried to open connector or light sensor...

[mikezang]

I just pried the back plates both of light sensor and wire connector.

Though separate was very difficult, at the moment, this light sensor is good.

I found LEGO don't use solder for their wires to electric plates, this is why they used a thinker wire insulator.

Next I have to replace this bad wire with a soft one by soldering, i am confident for electric plate, but I am not good at soldering skills, I am afraid of tiny point on the circuit board! Do you have any suggestion or tips?

[weavil]

Make sure the tip of the iron is clean. Use sandpaper to clean the tip. Try to get all or most or the old solder off, use small size soldering wire, and take your time. Will try to take pictures of process later tonight.

[weavil]

Hope this works...

and

[mikezang]

  On 10/11/2013 at 12:43 AM, weavil said:

Hope this works...

I just found a easier way to fix it, this way that I don't need to use soldering. I use nail polish to cover wire so that a insulator is out of wire.

My soldering is very bad, I think the time is too long and parts might be damaged...

Anyway, thanks for your video.

[weavil]

That reminded me of something awsome...

Shake the crap out of it apply as many coats as needed (letting dry between coats) and done! Used on other products, non-Lego. It seals, holds, and flexes. It's just liquid electrical tape. IMHO, worth the money. http://www.usplastic.com/catalog/item.aspx?itemid=38330

Edited October 12, 2013 by weavil