Rhodes Chroma Polaris

That applies to me as well.  Thanks.

Tracy


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On Wed, 6/6/18, Gregory Cox adhmzaiusz@... [chromapolaris] <chromapolaris@yahoogroups.com> wrote:

 Subject: Re: [chromapolaris] Polaris broken.... help!
 To: "chromapolaris@yahoogroups.com" <chromapolaris@yahoogroups.com>
 Date: Wednesday, June 6, 2018, 11:52 AM
 
 
  
 
 
 
   
 
 
     
       
       
       
 
 
 By the way Bob, Lou’s the guy with the problem, not I  ;)
   Anyway Lou, before you set off on a complicated journey,
 I would honestly re-examine the DC OK threshold in detail.
  My main argument of why-- sometimes the power supply DC OK
 LED comes on when adjusted
  but may still need a little more juice in some situations
 to work correctly.  Without the correct DC OK setting none
 of the digital side will work and the polaris will be
 unresponsive with LEDs lit just as you originally described.
  After making a small incremental
  adjustment reset the power and see if it helped, then
 repeat again to see if any higher adjustment works.
 
 
 
 A while ago my polaris appeared to be screwed and
 unresponsive but it was a finicky trimmer on the power
 supply.  Make sure it’s sprayed with a contact cleaner or
 something and readjust as described in the service
 manual.
 
 
 
 Greg
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 On Jun 5, 2018, at 8:13 PM, 'Lou Champagne' 
 lou@... [chromapolaris] <chromapolaris@yahoogroups.com>
 wrote:
 
 
 
 
 
 
 
 
 
 
 
 I’m down to two 6264 now with nothing to report
 after having swapped them around a bit to make
 sure. 
 
   
 Lou 
 
 
 
 >>
 
 
 
 Are the installed RAMs 6264 types? If so, just two of them
 installed is a valid configuration,
 
 so you could remove all but two and swap those out to see if
 you have a bad RAM chip. You can see the 
 
 valid configurations and jumper setting in the service
 manual.
 
 
 
 The service manual mentions that U84 and some other gates
 are not used in the Polaris, and this circuitry
 
 was for something that Fender was developing. I think this
 is the circuit that was driving PREQ, so 
 
 probably it's OK to be sitting high.
 
 
 
 Bob 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
      
 
     
     
 
 
 
 #yiv5042080038 #yiv5042080038 --