Rhodes Chroma Polaris

The CPU cover slides to the left and then up.

Tracy


--------------------------------------------
On Fri, 7/13/18, conor.strachan@... [chromapolaris] <chromapolaris@yahoogroups.com> wrote:

 Subject: [chromapolaris] RE: Polaris Later version Secondary board
 To: chromapolaris@yahoogroups.com
 Date: Friday, July 13, 2018, 4:01 PM
 
 
  
 
 
 
   
 
 
     
       
       
       Hi Paul 
 
 
 
 Thanks for your reply.
 
 The amount of noise coming of the output with the crackling
 It doesn't make me think it's a power thing coming
 from somewhere. 
 
 
 
 Do you mean the VR at R4 on the secondary board. On my board
 the R3 is not tweakable it's only R4 and R15 that have
 trimmers. 
 
 
 
 First thing I will do after that is change the caps, as
 it's easy to do and start with the one that looks a bit
 corroded for sure. 
 
 
 
 A friend of mine was saying it might be the Z2 5v regulator
 as he said it's happen to him on few synths before but I
 believe on the board it is a 12v regulator and not a 5v
 there is a LM340 on the schemes but inside mine at Z2 is a
 LM7812ct which I believe is 12v. That might be worth a try
 if the caps are not the problem. 
 
 
 
 I would need to get hold of an EPROM programmer to redo them
 which I can do, but this just happened pretty much overnight
 so it wasn't like it was a slow decrease in
 functionality..
 
 
 
 I could clean out the RAM and processor sockets, i can't
 see how to get the metal shield off that processed though.
 
 
 
 
 Thanks for your help Polaris People 
 
     
      
 
     
     
 
 
 
 #yiv9781839065 #yiv9781839065 --