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Help With a Chroma Polaris - Please?

Help With a Chroma Polaris - Please?

2018-04-30 by adirondack_pc@...

Hi Everyone -

I have just undertaken refurbishing my Polaris. I fixed the output jacks, did a mod on my headphones (absolutely NO NOISE!), replaced the entire faceplate (Paul DeRocco) (because of faulty original strips), soldered in an LED and swapped out two sliders after repairing and cleaning them.

To me, that's about 4 hours work. But I love my Polaris sound. I wouldn't do all that for another keyboard, except for... anyway, here's my woes...

1) Filter Cutoff. when you first start to slide, it's sort of dead but then comes to life. Slide back to bottom and the sound completely goes away. Dead space. It's not the slider because I just changed it and received the same results as before. Exactly the same, but better movement.

2) Resonance - next to the Cutoff - related problem? I just replaced the slider and received the same results, although the slider was cleaned and so forth. When I hit the top, it gives resonance, but also some when I pull it all the way down. Ridiculous. Also much better movement.


3) I replaced the top left motherboard a while back with a used one (hence the broken LED) but that works now over Noise. Minor issue, can't complain. I had similar problems before with the old top left motherboard, but the sliders were a little bent and gave a slightly different result. This tells me it goes deeper than surface.

4) Now - when these problems occur, hitting the patch number I was playing brings back the original patch with no deformities / abnormalities. That's nice, but when I want a little Cutoff, I get totally "cut off" (pun intended).

5) The sliders on Cutoff and Resonance and smooth with no bumps / bruises since they'd been cleaned / replaced. At least I'm learning some good techniques here. There's a guy on YouTube who demonstrated how to do it properly and I think I have that part down now.

Observation: Methinks the Cutoff and Resonance have a chip / board problem but I wouldn't know where to look. I'm getting handy with a soldering gun, but not with schematics. I have 25 years repairing PCs but little multi-meter experience, especially when the specs aren't available. I have the Polaris schematics and service manual but I need to research it to get a clue as to what I'm up against.

If anyone can help me here, I have the remainder of the old top left motherboard, minus a few sliders and an LED that I'd gladly send to you in exchange for the info. The sliders sell on eBay for a few $ and it would be a small gold mine of parts.

Thanks for reading. I hope to hear from someone on this - even a clue!

Tracy Barber

Polaris Fiend



Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-02 by plat@...

Hi, where did you buy the replacement panel ?

----- Upprunaleg skilaboð -----
Frá: "vintagesynthrepair" <vintagesynthrepair@...m>
Til: "vintagesynthrepair" <vintagesynthrepair@yahoogroups.com>
Show quoted textHide quoted text
Sent: Mánudagur, 30. Apríl, 2018 05:03:12
Efni: [vintagesynthrepair] Help With a Chroma Polaris - Please?

Hi Everyone -

I have just undertaken refurbishing my Polaris.  I fixed the output jacks, did a mod on my headphones (absolutely NO NOISE!), replaced the entire faceplate (Paul DeRocco) (because of faulty original strips), soldered in an LED and swapped out two sliders after repairing and cleaning them.

To me, that's about 4 hours work.  But I love my Polaris sound.  I wouldn't do all that for another keyboard, except for...   anyway, here's my woes...

1) Filter Cutoff.  when you first start to slide, it's sort of dead but then comes to life.  Slide back to bottom and the sound completely goes away.  Dead space.  It's not the slider because I just changed it and received the same results as before.  Exactly the same, but better movement.

2) Resonance - next to the Cutoff - related problem?  I just replaced the slider and received the same results, although the slider was cleaned and so forth.  When I hit the top, it gives resonance, but also some when I pull it all the way down.  Ridiculous.  Also much better movement.


 3) I replaced the top left motherboard a while back with a used one (hence the broken LED) but that works now over Noise.  Minor issue, can't complain.  I had similar problems before with the old top left motherboard, but the sliders were a little bent and gave a slightly different result.  This tells me it goes deeper than surface.

4) Now - when these problems occur, hitting the patch number I was playing brings back the original patch with no deformities / abnormalities.  That's nice, but when I want a little Cutoff, I get totally "cut off" (pun intended).

5) The sliders on Cutoff and Resonance and smooth with no bumps / bruises since they'd been cleaned / replaced.  At least I'm learning some good techniques here.  There's a guy on YouTube who demonstrated how to do it properly and I think I have that part down now.

Observation: Methinks the Cutoff and Resonance have a chip / board problem but I wouldn't know where to look.  I'm getting handy with a soldering gun, but not with schematics.  I have 25 years repairing PCs but little multi-meter experience, especially when the specs aren't available.  I have the Polaris schematics and service manual but I need to research it to get a clue as to what I'm up against.

If anyone can help me here, I have the remainder of the old top left motherboard, minus a few sliders and an LED that I'd gladly send to you in exchange for the info.  The sliders sell on eBay for a few $ and it would be a small gold mine of parts.

Thanks for reading.  I hope to hear from someone on this - even a clue!

Tracy Barber
 Polaris Fiend

RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-03 by Hamblin, Scott

Not sure if it’s helpful or not, but many times the sliders used in filters and audio circuits are logarithmic. Fitting the wrong ones (linear) could cause these symptoms.

It would be worth checking the service documents to confirm what type your Polaris should have.

We’ve all been caught before, replacing like for like components only to find that somebody in the past had installed the wrong spec part.

From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com]
Sent: Monday, 30 April 2018 3:03 PM
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] Help With a Chroma Polaris - Please?

Hi Everyone -

I have just undertaken refurbishing my Polaris. I fixed the output jacks, did a mod on my headphones (absolutely NO NOISE!), replaced the entire faceplate (Paul DeRocco) (because of faulty original strips), soldered in an LED and swapped out two sliders after repairing and cleaning them.

To me, that's about 4 hours work. But I love my Polaris sound. I wouldn't do all that for another keyboard, except for... anyway, here's my woes...

1) Filter Cutoff. when you first start to slide, it's sort of dead but then comes to life. Slide back to bottom and the sound completely goes away. Dead space. It's not the slider because I just changed it and received the same results as before. Exactly the same, but better movement.

2) Resonance - next to the Cutoff - related problem? I just replaced the slider and received the same results, although the slider was cleaned and so forth. When I hit the top, it gives resonance, but also some when I pull it all the way down. Ridiculous. Also much better movement.

3) I replaced the top left motherboard a while back with a used one (hence the broken LED) but that works now over Noise. Minor issue, can't complain. I had similar problems before with the old top left motherboard, but the sliders were a little bent and gave a slightly different result. This tells me it goes deeper than surface.

4) Now - when these problems occur, hitting the patch number I was playing brings back the original patch with no deformities / abnormalities. That's nice, but when I want a little Cutoff, I get totally "cut off" (pun intended).

5) The sliders on Cutoff and Resonance and smooth with no bumps / bruises since they'd been cleaned / replaced. At least I'm learning some good techniques here. There's a guy on YouTube who demonstrated how to do it properly and I think I have that part down now.

Observation: Methinks the Cutoff and Resonance have a chip / board problem but I wouldn't know where to look. I'm getting handy with a soldering gun, but not with schematics. I have 25 years repairing PCs but little multi-meter experience, especially when the specs aren't available. I have the Polaris schematics and service manual but I need to research it to get a clue as to what I'm up against.

If anyone can help me here, I have the remainder of the old top left motherboard, minus a few sliders and an LED that I'd gladly send to you in exchange for the info. The sliders sell on eBay for a few $ and it would be a small gold mine of parts.

Thanks for reading. I hope to hear from someone on this - even a clue!

Tracy Barber

Polaris Fiend

The information contained in this communication is confidential, may be subject to legal privileges, may constitute inside information, and is intended only for the use of the addressee. It is the property of Abbott Laboratories or its relevant affiliate. Unauthorized use, disclosure or copying of this communication or any part thereof is strictly prohibited and may be unlawful. If you have received this communication in error, please notify Abbott Laboratories immediately by return e-mail and destroy this communication and all copies thereof, including all attachments.

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-07 by Malte Rogacki

If I remember correctly there is some way to calibrate the slider response.

I once had a Polaris with similar problems that just need to get its
sliders properly calibrated. I think not all sliders were affected (which
made the fault finding somewhat tricky).

RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-08 by Tracy Barber

Could be someone screwed the pooch before I bought it.  But, I don't remember it having these problems before it went into "hibernation" for a decade..

At least I DO know how to clean the sliders and solder them correctly, so more investigation is needed.  Now if I can read the schematics better...  :)

Thanks...

Tracy



--------------------------------------------
On Thu, 5/3/18, 'Hamblin, Scott' scott.hamblin@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Thursday, May 3, 2018, 3:30 AM


  






    






 Not sure if it’s helpful or not,
 but many times the sliders used in filters and audio
 circuits are logarithmic. Fitting the wrong ones (linear)
 could
  cause these symptoms.   
   
 It would be worth checking the
 service documents to confirm what type your Polaris should
 have.

 We’ve all been caught before,
 replacing like for like components only to find that
 somebody in the past had installed the wrong spec part.

   
   
   

   

   


 From:
 vintagesynthrepair@yahoogroups.com
 [mailto:vintagesynthrepair@yahoogroups.com]


 Sent: Monday, 30 April 2018 3:03 PM

 To: vintagesynthrepair@yahoogroups.com

 Subject: [vintagesynthrepair] Help With a Chroma
 Polaris - Please?


   
  



 Hi Everyone -



 I have just undertaken refurbishing my Polaris.  I fixed
 the output jacks, did a mod on my headphones (absolutely NO
 NOISE!), replaced the entire faceplate (Paul DeRocco)
 (because of faulty original strips), soldered in an LED and
 swapped out two sliders after
  repairing and cleaning them.



 To me, that's about 4 hours work.  But I love my
 Polaris sound.  I wouldn't do all that for another
 keyboard, except for...   anyway, here's my woes...



 1) Filter Cutoff.  when you first start to slide, it's
 sort of dead but then comes to life.  Slide back to bottom
 and the sound completely goes away.  Dead space.  It's
 not the slider because I just changed it and received the
 same results as before.  Exactly
  the same, but better movement.



 2) Resonance - next to the Cutoff - related problem?  I
 just replaced the slider and received the same results,
 although the slider was cleaned and so forth.  When I hit
 the top, it gives resonance, but also some when I pull it
 all the way down.  Ridiculous. 
  Also much better movement.
   
 3) I replaced the top left motherboard a while back with
 a used one (hence the broken LED) but that works now over
 Noise.  Minor issue, can't complain.  I had similar
 problems before with the old top left motherboard, but the
 sliders were a little bent and
  gave a slightly different result.  This tells me it goes
 deeper than surface.



 4) Now - when these problems occur, hitting the patch number
 I was playing brings back the original patch with no
 deformities / abnormalities.  That's nice, but when I
 want a little Cutoff, I get totally "cut off" (pun
 intended).



 5) The sliders on Cutoff and Resonance and smooth with no
 bumps / bruises since they'd been cleaned / replaced. 
 At least I'm learning some good techniques here. 
 There's a guy on YouTube who demonstrated how to do it
 properly and I think I have that part down
  now.



 Observation: Methinks the Cutoff and Resonance have a chip /
 board problem but I wouldn't know where to look. 
 I'm getting handy with a soldering gun, but not with
 schematics.  I have 25 years repairing PCs but little
 multi-meter experience, especially when
  the specs aren't available.  I have the Polaris
 schematics and service manual but I need to research it to
 get a clue as to what I'm up against.



 If anyone can help me here, I have the remainder of the old
 top left motherboard, minus a few sliders and an LED that
 I'd gladly send to you in exchange for the info.  The
 sliders sell on eBay for a few $ and it would be a small
 gold mine of parts.



 Thanks for reading.  I hope to hear from someone on this -
 even a clue!



 Tracy Barber
 Polaris Fiend
   
   






 The information contained in this
 communication is confidential, may be subject to legal
 privileges, may constitute inside information, and is
 intended only for the use of the addressee. It is the
 property of Abbott Laboratories or its
  relevant affiliate. Unauthorized use, disclosure or copying
 of this communication or any part thereof is strictly
 prohibited and may be unlawful. If you have received this
 communication in error, please notify Abbott Laboratories
 immediately by return e-mail
  and destroy this communication and all copies thereof,
 including all attachments.







      






 #yiv0875583958 #yiv0875583958 --

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-08 by Tracy Barber

I'd prefer not to mention that, because an LED was bad on it - but - I fixed it.  A reputable source, from other things purchased from them.  Since I mentioned that to them, I told them I wouldn't pass on bad info.  I may need a favor down the road.

I think I need to scour the sucker thoroughly one more time for any trace problems.  I'm thinking it's on the top left mommy board but there are 2 others in there as well.  Sounds like a complete breakdown of the synth and complete look over.  If it's a chip gone bad, I may SOL, but maybe not.

BTW, it IS better than it was, but not up to speed.  So, the replacement board did help it some so far.

Tracy


--------------------------------------------
On Wed, 5/2/18, plat@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Wednesday, May 2, 2018, 6:15 PM


  



   





       Hi, where did you buy the replacement panel ?



 ----- Upprunaleg skilaboð -----

 Frá: "vintagesynthrepair"
 <vintagesynthrepair@yahoogroups..com>

 Til: "vintagesynthrepair"
 <vintagesynthrepair@yahoogroups.com>

 Sent: Mánudagur, 30. Apríl, 2018 05:03:12

 Efni: [vintagesynthrepair] Help With a Chroma Polaris -
 Please?



 Hi Everyone -



 I have just undertaken refurbishing my Polaris.  I fixed the
 output jacks, did a mod on my headphones (absolutely NO
 NOISE!), replaced the entire faceplate (Paul DeRocco)
 (because of faulty original strips), soldered in an LED and
 swapped out two sliders after repairing and cleaning
 them.



 To me, that's about 4 hours work..  But I love my Polaris
 sound.  I wouldn't do all that for another keyboard,
 except for...   anyway, here's my woes...



 1) Filter Cutoff.  when you first start to slide, it's
 sort of dead but then comes to life.  Slide back to bottom
 and the sound completely goes away.  Dead space.  It's
 not the slider because I just changed it and received the
 same results as before.  Exactly the same, but better
 movement.



 2) Resonance - next to the Cutoff - related problem?  I just
 replaced the slider and received the same results, although
 the slider was cleaned and so forth.  When I hit the top, it
 gives resonance, but also some when I pull it all the way
 down.  Ridiculous.  Also much better movement.





 3) I replaced the top left motherboard a while back with a
 used one (hence the broken LED) but that works now over
 Noise.  Minor issue, can't complain.  I had similar
 problems before with the old top left motherboard, but the
 sliders were a little bent and gave a slightly different
 result.  This tells me it goes deeper than surface.



 4) Now - when these problems occur, hitting the patch number
 I was playing brings back the original patch with no
 deformities / abnormalities.  That's nice, but when I
 want a little Cutoff, I get totally "cut off" (pun
 intended).



 5) The sliders on Cutoff and Resonance and smooth with no
 bumps / bruises since they'd been cleaned / replaced.
 At least I'm learning some good techniques here.
 There's a guy on YouTube who demonstrated how to do it
 properly and I think I have that part down now.



 Observation: Methinks the Cutoff and Resonance have a chip /
 board problem but I wouldn't know where to look.
 I'm getting handy with a soldering gun, but not with
 schematics.  I have 25 years repairing PCs but little
 multi-meter experience, especially when the specs aren't
 available.  I have the Polaris schematics and service manual
 but I need to research it to get a clue as to what I'm
 up against.



 If anyone can help me here, I have the remainder of the old
 top left motherboard, minus a few sliders and an LED that
 I'd gladly send to you in exchange for the info.  The
 sliders sell on eBay for a few $ and it would be a small
 gold mine of parts.



 Thanks for reading.  I hope to hear from someone on this -
 even a clue!



 Tracy Barber

  Polaris Fiend











 #yiv3470343433 #yiv3470343433 --

RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-08 by Tracy Barber

BTW, the 3 images contained nothing - zip - nada.   Thought I'd mention it.

Tracy


--------------------------------------------
On Thu, 5/3/18, 'Hamblin, Scott' scott.hamblin@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Thursday, May 3, 2018, 3:30 AM


  








      




 Not sure if it’s helpful or not,
 but many times the sliders used in filters and audio
 circuits are logarithmic. Fitting the wrong ones (linear)
 could
  cause these symptoms.  
   
 It would be worth checking the
 service documents to confirm what type your Polaris should
 have.

 We’ve all been caught before,
 replacing like for like components only to find that
 somebody in the past had installed the wrong spec part.

   
   
   

   

   


 From:
 vintagesynthrepair@yahoogroups.com
 [mailto:vintagesynthrepair@yahoogroups.com]


 Sent: Monday, 30 April 2018 3:03 PM

 To: vintagesynthrepair@yahoogroups.com

 Subject: [vintagesynthrepair] Help With a Chroma
 Polaris - Please?


   
  



 Hi Everyone -

 

 I have just undertaken refurbishing my Polaris.  I fixed
 the output jacks, did a mod on my headphones (absolutely NO
 NOISE!), replaced the entire faceplate (Paul DeRocco)
 (because of faulty original strips), soldered in an LED and
 swapped out two sliders after
  repairing and cleaning them.



 To me, that's about 4 hours work.  But I love my
 Polaris sound.  I wouldn't do all that for another
 keyboard, except for...   anyway, here's my woes...



 1) Filter Cutoff.  when you first start to slide, it's
 sort of dead but then comes to life.  Slide back to bottom
 and the sound completely goes away.  Dead space.  It's
 not the slider because I just changed it and received the
 same results as before.  Exactly
  the same, but better movement.



 2) Resonance - next to the Cutoff - related problem?  I
 just replaced the slider and received the same results,
 although the slider was cleaned and so forth.  When I hit
 the top, it gives resonance, but also some when I pull it
 all the way down.  Ridiculous. 
  Also much better movement.
   
 3) I replaced the top left motherboard a while back with
 a used one (hence the broken LED) but that works now over
 Noise.  Minor issue, can't complain.  I had similar
 problems before with the old top left motherboard, but the
 sliders were a little bent and
  gave a slightly different result.  This tells me it goes
 deeper than surface.



 4) Now - when these problems occur, hitting the patch number
 I was playing brings back the original patch with no
 deformities / abnormalities.  That's nice, but when I
 want a little Cutoff, I get totally "cut off" (pun
 intended).



 5) The sliders on Cutoff and Resonance and smooth with no
 bumps / bruises since they'd been cleaned / replaced. 
 At least I'm learning some good techniques here. 
 There's a guy on YouTube who demonstrated how to do it
 properly and I think I have that part down
  now.



 Observation: Methinks the Cutoff and Resonance have a chip /
 board problem but I wouldn't know where to look. 
 I'm getting handy with a soldering gun, but not with
 schematics.  I have 25 years repairing PCs but little
 multi-meter experience, especially when
  the specs aren't available.  I have the Polaris
 schematics and service manual but I need to research it to
 get a clue as to what I'm up against.



 If anyone can help me here, I have the remainder of the old
 top left motherboard, minus a few sliders and an LED that
 I'd gladly send to you in exchange for the info.  The
 sliders sell on eBay for a few $ and it would be a small
 gold mine of parts.



 Thanks for reading.  I hope to hear from someone on this -
 even a clue!



 Tracy Barber
 Polaris Fiend
   
   






 The information contained in this
 communication is confidential, may be subject to legal
 privileges, may constitute inside information, and is
 intended only for the use of the addressee. It is the
 property of Abbott Laboratories or its
  relevant affiliate. Unauthorized use, disclosure or copying
 of this communication or any part thereof is strictly
 prohibited and may be unlawful. If you have received this
 communication in error, please notify Abbott Laboratories
 immediately by return e-mail
  and destroy this communication and all copies thereof,
 including all attachments.














 #yiv2427893056 #yiv2427893056 --

Re: Help With a Chroma Polaris - Please?

2018-05-10 by hm

Hi Tracy, i have the same issue with the polaris but i can live with that even it is strange.
I updated the eproms to the latest derocco firmware, this gets you a faster envelope but the filter/cutoff dead space is the same.

an idea is to this to post this to the polaris yahoo group here and i'm shure paul will answer you in a minute or two..

btw..whats the no noise mod to the headphones?

cheers karma

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-10 by Tracy Barber

That is correct.  Most of the sliders work just fine.  They're all 10K as well.

Tracy


--------------------------------------------
On Mon, 5/7/18, Malte Rogacki gacki@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Monday, May 7, 2018, 5:02 PM


  









       If I remember correctly there is some way to
 calibrate the slider response.



 I once had a Polaris with similar problems that just need to
 get its

 sliders properly calibrated. I think not all sliders were
 affected (which

 made the fault finding somewhat tricky).






      






 #yiv1273947475 #yiv1273947475 --

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-10 by Tracy Barber

I've done the volume ADC Range test.  I've done most of the diagnostics I've found.  Not all of them, for sure.

Tracy



--------------------------------------------
On Mon, 5/7/18, Malte Rogacki gacki@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Monday, May 7, 2018, 5:11 PM


  



  





       Addition: I believe the two important calibrations
 here are ADC Range and

 DAC Null.








  




 #yiv6784334267 #yiv6784334267 --

Re: Help With a Chroma Polaris - Please?

2018-05-11 by jordanascotott@...

Hi Tracy, i have the same issue with the polaris here but i can live with that even it is strange.
I updated the eproms to the latest derocco firmware, this gets you a faster envelope but the filter/cutoff dead space is the same.
an idea is to post this to the polaris yahoo group here and i'm shure paul (who sells the replacement panel) will answer you in a minute or two..
btw..whats the no noise mod to the headphones?
cheers karma

RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-12 by jordanascotott@...

Hi Tracy, i have the same issue with the polaris but i can live with that even it is strange.
I updated the eproms to the latest derocco firmware, this gets you a faster envelope but the filter/cutoff dead space is the same.
an idea is to this to post this to the polaris yahoo group here and i'm shure paul will answer you in a minute or two..
btw..whats the no noise mod to the headphones?
cheers karma

Re: Help With a Chroma Polaris - Please?

2018-05-13 by jordanascotott@...

Hi Tracy, i have the same issue with the polaris but i can live with that even it is strange.
I updated the eproms to the latest derocco firmware, this gets you a faster envelope but the filter/cutoff dead space is the same.
an idea is to this to post this to the polaris yahoo group here-> https://groups.yahoo.com/neo/groups/chromapolaris/info and i'm shure paul will answer you in a minute or two..
btw..whats the no noise mod to the headphones?

cheers karma

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-14 by plat@...

Does anyone have a contact for buying the front panel for the Chroma ?
Cannot find any contact info here
http://www.rhodeschroma.com/?id=polarismembranepanelreplacement?

----- Upprunaleg skilaboð -----
Frá: "vintagesynthrepair" <vintagesynthrepair@yahoogroups.com>
Til: "vintagesynthrepair" <vintagesynthrepair@yahoogroups.com>
Show quoted textHide quoted text
Sent: Fimmtudagur, 10. Maí, 2018 19:28:06
Efni: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

That is correct.  Most of the sliders work just fine.  They're all 10K as well.

Tracy


--------------------------------------------
On Mon, 5/7/18, Malte Rogacki gacki@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:

 Subject: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Monday, May 7, 2018, 5:02 PM


  









       If I remember correctly there is some way to
 calibrate the slider response.



 I once had a Polaris with similar problems that just need to
 get its

 sliders properly calibrated. I think not all sliders were
 affected (which

 made the fault finding somewhat tricky).













 #yiv1273947475 #yiv1273947475 --

Re: [vintagesynthrepair] Re: Help With a Chroma Polaris - Please?

2018-05-15 by Tracy Barber

Headphones -

On the cable bundle, there's a brown cable not doing anything..  Use that instead of the green cable attached to the headphones.  I put a new connector in and tried this.  It worked.  I capped off the green cable so it won't run rampant inside the keyboard.  Paul told me to do this and it worked like a charm.

I posted my situation to Paul and didn't receive a response.  This is after I replace the face plate contacts.  That made the Polaris much better, but even swapping out the top left mommy board didn't fix the contour problem.

Tracy



--------------------------------------------
On Thu, 5/10/18, hm jordanascotott@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: [vintagesynthrepair] Re: Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Thursday, May 10, 2018, 2:32 PM


  









         Hi Tracy, i have the same
 issue with the polaris but i can live with that even it is
 strange.I updated the
 eproms to the latest derocco firmware, this gets you a
 faster envelope but the filter/cutoff dead space is the
 same.  an idea is to this to post
 this to the polaris yahoo group here and i'm shure paul
 will answer you in a minute or two..  btw..whats the no noise mod
 to the headphones?
  cheers
 karma









 #yiv3191100264 #yiv3191100264 --

RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-15 by Tracy Barber

I've already answered your first post on this.  It takes a while for our moderator to post the responses.

Tracy


--------------------------------------------
On Sat, 5/12/18, jordanascotott@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: RE: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups..com
 Date: Saturday, May 12, 2018, 11:32 AM


  






    


       Hi Tracy, i have the same issue with the
 polaris but i can live with that even it is strange.
 I updated the eproms to the latest derocco
 firmware, this gets you a faster envelope but the
 filter/cutoff dead space is the same.an idea is
 to this to post this to the polaris
 yahoo group here and i'm shure paul will
 answer you in a minute or two..btw..whats the no
 noise mod to the headphones?cheers karma



     






 #yiv5241699427 #yiv5241699427 --

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-15 by Tracy Barber

Email here:

pderocco@...

I bought mine from Paul.  Works wonderful.

Tracy

--------------------------------------------
On Mon, 5/14/18, plat@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Monday, May 14, 2018, 7:16 AM


  









       Does anyone have a contact for buying the front
 panel for the Chroma ?

 Cannot find any contact info here

 http://www.rhodeschroma.com/?id=polarismembranepanelreplacement?

Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

2018-05-16 by plat@...

Thanks !

----- Upprunaleg skilaboð -----
Frá: "vintagesynthrepair" <vintagesynthrepair@yahoogroups.com>
Til: "vintagesynthrepair" <vintagesynthrepair@yahoogroups.com>
Show quoted textHide quoted text
Sent: Þriðjudagur, 15. Maí, 2018 23:18:36
Efni: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?

Email here:

pderocco@...

I bought mine from Paul.  Works wonderful.

Tracy

--------------------------------------------
On Mon, 5/14/18, plat@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:

 Subject: Re: [vintagesynthrepair] Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Monday, May 14, 2018, 7:16 AM


  









       Does anyone have a contact for buying the front
 panel for the Chroma ?

 Cannot find any contact info here

 http://www.rhodeschroma.com/?id=polarismembranepanelreplacement?

Re: [vintagesynthrepair] Re: Help With a Chroma Polaris - Please?

2018-05-17 by jordanascotott@...

sorry for doublepostings, i thought the mail didn't come thru.

thanks for the headphone info. i need new connectors too and will check this out.
And its strange that paul didn't respond to your slider dead space issue..?
i might check a technican here

Re: [vintagesynthrepair] Re: Help With a Chroma Polaris - Please?

2018-05-18 by Tracy Barber

That's OK, we have those days...

I think the power supply is starting to die.  Saw the example of it last night.

I may have upset Paul by emailing him at his home addy.  don't know...  since then, he hasn't said a word to me.  I guess maybe that's for being a good customer?  :^)

On a serious note, I can't ship that sucker out and have it repaired.  It'd cost a mortgage.  I'm trying to not skip out on paying techs but the mailing costs are on the roof, let alone the hourly charge would probably be more than it's worth..  Market value of about $1200 on eBay - or more - but still... when you're broke, you're broke.   I spent a bunch starting to clean up the other relics I have.  Batteries, boards, power supplies, etc.  This last power supply I can afford, if that's the problem.  I think it may be.

Yeah, since I live in an apartment and can't have the mixer / amp cranked, the headphones are the cat's meow.  what a SERIOUS difference in quality with an old beat up set of phones.

Anyhoo, talk to you sometime...

Tracy


--------------------------------------------
On Thu, 5/17/18, jordanascotott@... [vintagesynthrepair] <vintagesynthrepair@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: Re: [vintagesynthrepair] Re: Help With a Chroma Polaris - Please?
 To: vintagesynthrepair@yahoogroups.com
 Date: Thursday, May 17, 2018, 12:16 PM


  









       sorry for doublepostings, i thought the mail
 didn't come thru.

 thanks for the headphone info. i need new
 connectors too and will check this out.
 And
 its strange that paul didn't respond to your slider dead
 space issue..?
 i might check a technican
 here

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