Disklavier

Hello yadidisklavier,

good news: Today I could repair the LC-Display of my MX100II
successfully. I just used our disklavier for recording my daughter's
piano piece "Brasilian flair". 
Diagnose: One of the two caps (4,7 uF , small black cube) was bad and 
so chemical agressive liquid run out. So a conductive strip was
corroded and the result was a gap in the strip.
I bridged the gap and replaced the two caps.

Maybe your display has the same defect. To check this you only have to
bend the two caps in order to can see the stips. Then use a magnifying
glass to check them.
You can also measure whether strips are broken.
If you have an expert for electronics he can do that for you.

I hope I could give you a hint.

btw: Electrolyt caps often fails because of run out liquid or dry out.
That's a known problem. After 20 years of lifetime all electrolyt caps
could be checked and replaced as a precaution if wanted.

Bernhard

St. Gallen / Switzerland

--- In disklavier@yahoogroups.com, "yadidisklavier"
<yadidisklavier@...> wrote:
>
> Thanks for the head up.  I'm guessing I would have figured that out 
> when I looked closer.  Nonetheless, thanks.
> 
> Heres the rest of my story:  The tech called me yesterday and told me 
> that Yamaha said these displays are on back order until June 2007.  
> They've had a rash of replacements recently!  And "it seems that 
> these are subjected to age failure".  $260 plus $100 labor, on top of 
> the $75 labor (already paid) to diagnose.  Jeez, at least I have time 
> to budget for it.
>