Rhodes Chroma Polaris

Bob -

I actually have them here.  Section 9 of the service manual has the pairs.  That's where I got the info, from the site.  You have a good idea, however...  I was looking at these but didn't come up with any way to do anything with them.  Your example would be "J" and "K", vibrato and pitch pedal, glide and rate pedal if you put all the cross overs together.

So, you're saying check out the ribbon cables again for anything out of the ordinary?  That I can do.  Clean them with alcohol, yes?

I sprayed the connectors with canned air and used a little Deoxy D5 on them to clean them up already.  Made sure they were in and lined up properly.

Unfortunately, I can't check the side that is connected to the face plates because they're buried under the material.  Also, they're brand new.  Sheesh...  I also did the "S" curve as told to by the video.   I sure wished they would've spent a few more $ on real connectors.  You also can't get a swab in there to clean the contacts better.  I wonder if an alcohol pad would work?

Tracy

**** 
 
 
 If you go to this site, and scroll down to the bottom, you
 can see the connections to the front panel membrane
 switches.
 
 These are not shown in the service manual schematics.
 
 
 
 http://www.rhodeschroma.com/?id=polarisserviceschematics
 
 
 
 If you look at switches A and G you will see that one end of
 each is common, and only the other end is different.
 
 One connects to J9A-3 SWSTB4 and the other connects to J9A-4
 SWSTB5.   If something is shorting those two
 
 signals together, such as a solder splash, or possibly a bit
 of the old membrane flex still in the connector, then when
 
 
 you press G, you could get an A.   A lot of other pairs of
 switches would also be joined by such a short.   I suggest
 
 
 you troubleshoot the front panel issue and get it resolved
 before trying to troubleshoot anything else.  A DMM
 measuring 
 
 resistance should help to see if there is some kind of short
 between those two signals.
 
 
 
 Bob
 
  
 
 
 
     
      
 
     
     
 
 
 
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