Sony Ericsson K810i Joystick Repair

[Shooog]

Hi

Looking for some advice about repairing the joystick on a Sony Ericsson K810i. Someone has already tried to repair the phone by soldering on a new joystick, but when powered up, the joystick still didn't work. I've un-soldered the joystick and I can see that a few of the pads have been lifted off the PCB, and some of the nearby components (diodes?) have been destroyed or removed.


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I've found a few diagrams which appear to suggest how to re-wire the joystick when the pads are missing, but they are not all the same.

Diagram #1 is, I think, from a K790 although it does mention K800, but the layout is slightly different. Regardless, it suggests removing the diodes and connecting to the pads as follows:
5, 4, 3, 2, 1


(Click image for larger version)


Diagram#2 leaves the diodes in place and connects from them to the pads as follows:
5, 1, 3, 2, 4


(Click image for larger version)


Digram#3 suggests removing the diodes and connecting to the pads as follows:
5, 1, 3, 2, 4


(Click image for larger version)


So, which one is right?

Also, on my PCB some of the joystick pads are still there so should I use them and only use the alternative wiring for the missing ones? Or is it best to use the alternative wiring for all of the joystick points?

Help appreciated, thanks

[Shooog]

Just looked at diagram#1 again and I'm wrong. It is wired in the same order as the other ones.

But I'm still unsure what to do about missing diodes? and whether to only use the alternative wiring for the missing joystick pads or for all of the joystick points?

Thanks

[..::Seerat::..]

thanks bro good post

[Shooog]

Originally Posted by ..::Seerat::..

thanks bro good post

Not really. Just used the search button to find stuff.

Hoping someone can help me with my question about diodes and existing pads.

Thanks