[sdiy] oberheim matrix6

[Nate Reeves]

ok will do, i am stumped as all voltages on the power supply board are  
within the given tolerances in the service manual......

i am not getting any voltage readings off the -42V power rails, which  
come straight off the xfmr.... odd as it was powering the display  
yesterday morning now nothing.....

maybe the xfmr needs replacing?  i would hate to do that as the other  
rails off it seems to working fine (the -5V, +5A, +5B, +12V, -12V)   
all seems to be present at the power supply and i measured them on  
their respective destinations and seems aok!

i will double check the voltages off the xfmr, i think its 2 -42V and  
their ground?  the schemo is hard to read!

i will pull the ICs and clean them, what should i use?  i  have an IC  
chip puller but can i wipe them off with some solvent?  alcohol?

cheers and again thanks for the advice!

P.S.

its an amazing synth! i love the matrix Mod!

On Oct 6, 2008, at 3:58 AM, Gergo Palatinszky wrote:

> Hi,
>
> Typical problems with these units that the legs of the ICs which are  
> in socket ha some oxide layer, plug out all ics clean the lags and  
> plug in again...   this can solve audio path problems but might you  
> have totally different one ...
>
> Br,
> 	Pala
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl 
> ] On Behalf Of Nate Reeves
> Sent: 2008. október 4. 17:09
> To: Synth-DIY DIY
> Subject: [sdiy] oberheim matrix6
>
> anyone have a service manual for this unit?
>
> i have one that i am trying to repair, it powers up fine, but when you
> touch a key or button it shuts off!?!?!
>
> any ideas?
>
> thanks all!
>
> nate
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