Rhodes Chroma Polaris

I should have said when the cover was on.  My mistake.

Tracy



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

 Subject: Re: [chromapolaris] RE: Polaris Later version Secondary board
 To: chromapolaris@yahoogroups.com
 Date: Friday, July 13, 2018, 9:46 AM
 
 
  
 
 
 
   
 
 
     
       
       
       Hi there
 Well
 I've got it all out on a bench so no membrane tail
 contact..
 What happens
 is it powers on is responsive like normal for 5 seconds then
 it starts going a bit crazy doing random things then it just
 freezes. If I turn it off and back on straight away it is
 still frozen but if you leave it for a minute you can repeat
 the whole thing again until it freezes. There is some nasty
 crackling happening on the output like some electricity
 bacon sizzling on a pan..
 I have the later secondary power
 board so it is a bit difficult as the service manual is
 really written for the first board.
 I am getting 4.80v on the DCOK when
 frozen.. but right away it is 4.76v with responsiveness
 before freeze.
 Digi +5
 it is hard to get it to load up with the Lower function D 3
 but when I can all lights are lit and I am getting +4.83V
 (now in the manual it says to adjust R9 but there is no R9
 to adjust on the secondary board>?? I need to get this up
 to 5v?)
 Ref +5v - this
 is at +4.98v
 AC OK -
 4.69v (measuring this from P3 4 yellow wire to the ground in
 middle of main board.)
 On the -12v I am getting
 -12.30VOn the +12v I am getting
 +12.08V
 If anyone has
 any suggestions let me know. I don't have a scope at
 hand just a multimeter..
 Cheers
 Conor
 
     
      
 
     
     
 
 
 
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