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Rhodes Chroma Polaris

Index last updated: 2026-04-28 23:17 UTC

Message

Re: Diagnostics

2004-08-04 by funkjunke

Wow, nice :) The plot thickens however...of course. First off though, 
all standard CC# controls work perfect via midi, the only control I'm 
noticing now does not seem to work at all, physically or midi, is the 
glide. That stirs some bad thoughts in my mind already.

I attempted the L-D-4 method, adjusting R45, with no change in any 
element whatsoever. I tried multiple times, and in slightly different 
manners. After that, I checked the Z53 and Z54 chips, and they seem 
extremely rooted. I'm assuming Z5 is underneath the back edge of the 
keys, since I could see 8, 9, 10, and so forth spreading from that 
direction. I don't have a DMM, so didn't check the voltages, but 
while inside I noticed a few other things. First being that someone 
seems to have maintanced it at some point. There's an extra ground on 
the far right side, soldered to a screw on the top panel which dosn't 
look like it was meant to be there, spreading down to a screw with 
the paint scraped off on the bottom. Checking all of the ultra frail 
ribbons more closely, all of the obviously visible ones look to be 
completely intact, but the one that is inbetween the top and the left 
circuit board, the one thats mostly hidden, looks to have a hairline 
crack nearly in it's center, crossing only one strand of strip. Not 
good.

So, with that said, I think I'll just sleep on it and wait to see 
what I think of it all in the morning.

Cheers and thanks alot for the info again :)
Byron

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