Pioneer CDJ-500 MK2

I use a pair bought 120 euros .... leb, the plates are nickel, no scratches no malfunction only track search button to search for a title kidding, sometimes it works but most often this key no longer works so I must return with reverse search button.
Just if someone could give me a tip for cleaning track search buttons I'm interested ...
Maybe I just need to disassemble and clean?

As I'm on deck technics sl 1210 mk2, I also had the ttx Numark TT500 Numark, Vestax pdx2000, stanton st 150, I've always preferred vinyl to cd but as I sometimes do not always find the titles I want I bought the cdj 500 because I did not have much to invest in a way to CDJ 1000 or 800.

What I like most is its simplicity of use, loop / reloop is great but what I love is the accuracy of the pitch ... It is clear that the cdj 500 mk2 is not very young but if you stumbled upon a pair that turns nickel is a case for a small budget for people who would like to learn mix ...

I now turn to cdj 1000 mk3 because I need a cd deck in order to stall and launched as on vinyl ... In addition the price has dropped, I found a pair of cdj 1000 mk3 with 400 euros so no problem I am more than satisfied but I still keep my cdj 500 to troubleshoot if there is a problem ...

Hello, some of you have experienced problems with the cdj 500 II, if my experience can serve you is this:
I bought 2 used cdj, as announced in working order, the salesman came to deliver me at home, we tried a few minutes, it worked, hard for me to accuse him of bad faith reading began to jump once it's gone ... The cd was rubbing on the optical shutter. I try the other four keys not working ... Being an electronics specialist but not of this material, I have everything removed, and inverted the top one on the bottom of the other, it works. It remains to fix the other: I moved up slightly from the support disc at once cd screwdriver closer to the axis to distort nothing, checked the height with a card-type payment card placed on the support for visualize its height relative to the axis, the more friction but a "tac-tac" disturbing blowing up the optical block. The night with the board, the idea came from two periods of sleep and if I had damaged the surface with the screwdriver? Bingo! I moved up to fourth coat, it runs well. Remains the key: cola sank in, limiting the race (0.3 mm). I ordered 10, they are basic and cost 22 cents coins. The tests I made in the shunting are positive.
Ask me your questions if you have, I will try to answer.
Alain