My only problem with this is that I tried cleaning the contact assembly,
and the result was worse than when I started. Now I have around a dozen
notes that don't turn off when they're pressed. I've disassembled my
DW8000 many times, including when I first got it back around 1990. The
previous owner had spilled a Coca-Cola in it, and I disassembled the
entire thing, every single key and circuit board. I've replaced all the
1/4" jacks because the plastic housings all cracked on mine. I've
replaced the CR2032 battery with a battery holder and new cell, and I've
had to resolder the data slider and DeOxit the volume slider. I'm no
newbie to electronics repair, but I can't figure out the problem with
the contact assembly at all. Trying to clean and adjust the contacts
made the thing worse. Unless I can get some progress going in the
direction of improvement, replacing the contact assembly with a
new-old-stock unit should give me a like-new DW8000. I'm willing to
take another crack at my contact assembly, but the new assembly has
already shipped from the Netherlands.
-Mark
On 12/24/11 12:34 PM, mondovermona wrote:
> Hello all,
>
> please trust your skills. The DW8000 keyboard is easy to repair and to put into service again. With some feeling for mechanics and understand of the contact assembly. I have managed to fix a keyboard even after a heavy impact due to the synth's falling from my car's roof (while car was standing...).
>
> Before you go throught the hassle of ordering and installing a new (used) contact assembly, try fix your own.
>
> You need a good eye (magnifying glass and good illumination) and a pair of tweezers. Just try to bend the worn out contact metal strips (contact springs) into the right position. I am sure there are some key left with flawless contacts that may serve as a template. There is a "note on" contact and there is a "note off" contact. The latter being more prone to failure due to oxidation and wear. It is important to have all contact strips in the same position, else the velocity will not be sensed correct. I never had a used DW8000 keyboard where the contact postiion was the same for all key - with negative impact on the velocity. So even if note on and off is sensed correctly it might be worth adjusting the contact strips after all these years of use.
>
> Once the contacts are all in about the same position, you need to get rid of oxadation. You need to use a strong oxidation remover (in Europe e.g. Kontakt 60), but ,in any event, you need to remove the applied antioxidant after use (i.e. once contact has been re-established) by means of some neutral solvent (alcohol or de-greaser will do; in Europe e.g. Kontakt 61, Kontakt WL or Tuner 600)
>
> I think the DW8000 keyboard contact assembly is pretty robust and serviceable. Who is able to remove or replace the whole keyboard in a DW8000 has enough skills to also service the key's contacts. Trust your skills!
>
>
>
>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>