Re: Chroma Polaris Vs. Chroma Polaris II
2019-03-18 by synthparts@...
The PS is the same as in later regular Polaris, right? Are you sure about the CPU and RAM changing? Doug synthparts.com

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2019-03-18 by synthparts@...
The PS is the same as in later regular Polaris, right? Are you sure about the CPU and RAM changing? Doug synthparts.com
2019-03-18 by rob.ocelot@...
On the outside as Doug says it s just cosmetic. There s a few updates on the inside (power supply, CPU, RAM) but nothing that drastically changes functionality
2019-03-18 by synthparts@...
I had both I and II and the only difference I could find was cosmetic - The lack of red and blue in the Chroma logo (just plain white), the II label, and the
2019-03-17 by chadgrisly@...
How was the Chroma Polaris different from the Chroma Polaris II?
2019-03-02 by Paul D. DeRocco
... Sure. It s powered from +5V too. Look at the schematic. It s at the bottom center of page 4 of the 11 page schematic PDF, the page labeled interface,
2019-03-01 by Florian Anwander
... Don t ask us, we are biased. Ask the potential buyers. (I d love to have a Prophet V, but won t ever afford it)
2019-03-01 by <chrisgoumas@...>
Hey all, I’ve got limited space and I’m staring at my rig thinking about getting a Prophet 5 and well my essentially mint Chroma Polaris, with new panels
2019-03-01 by Bob Grieb
There is no way all of the TTL chips would be powered by a small reed relay. That doesn t make any sense. The K1 (Motor control) Relay coil is connected to
2019-03-01 by conor.strachan@...
Hi There Thanks Lou for the tip on the RAM jumpers will make sure to give it a try.. Paul are you sure on the second board the OMRON LAB2 5v is just for the
2019-03-01 by Paul D. DeRocco
... I forgot about that relay. But all it does is turn an external Radio Shack cassette recorder on and off when you use the cassette functions. It has nothing
2019-02-28 by Lou Champagne
Hi Conor, Please give this a try. I had the same problem. After much testing with no results I found the jumper for memory size selection was open. It was in
2019-02-28 by conor.strachan@...
Hi Thanks Bob and Paul for replying. I have the newer board without the LED. The tech who has my board says there is an Omron LAB2 5v relay that lets the power
2019-02-28 by Paul D. DeRocco
... If you have the old power supply with the LED on it, make sure the LED is turning on. If it doesn t, the CPU is being held in reset, and the DC OK trimpot
2019-02-26 by Bob Grieb
In order to initialize the LEDs and other chips, the CPU needs to be running properly, which requires a good CPU, clock, and CPU reset, plus the EPROMs that
2019-02-26 by conor.strachan@...
Hi Paul Thanks for reply. Mine seems to be turning on and not getting past the phase where lights all come on. Would this happen if the EPROMS were corrupt or
2019-02-26 by Paul D. DeRocco
... There are no relays in the Polaris. On startup, the LEDs initially come up in a random state, and less than a second later the CPU initializes them to the
2019-02-25 by conor.strachan@...
Hi there My tech has got my Polaris at the moment. He asked a question I can t remember the answer to. What happens when the Polaris is switched on? Do all the
2019-02-15 by David Clarke
... Lower Function, ... but also the the sliders! ... The sliders should behave in a manner similar to the keyboard. Specifically - you are disabling local
2019-02-14 by Florian Anwander
... please ignore the was - silly cut n paste error...
2019-02-14 by Florian Anwander
Hello David, so I did my gig with the Chroma, but I was experienced, that Lower Function, Interface, 1 - Off does not switchoff the keyboard only, but also
2019-02-11 by Florian Anwander
Hello David thank you for the detailled explanation. With your words the things become understandable (the wording ...switch is toggled... in the manual
2019-02-10 by David Clarke
... Relative to the manual reference, LF_interface Controls 1) Whether the main instrument/link instrument/sequencer should receive local keyboard events 2)
2019-02-10 by Florian Anwander
Hello, I want to set my Chroma Polaris to local off. The keyboard should send MIDI-events, but the synth section should react only on events from the
2019-02-04 by RD
Hi, Paul, from Tony in Japan. I m a long-time Yahoo Chroma/Polaris subscriber ...however virtually never comment, Online. (Shy?/Busy?/ Lazy? Not sure,
2019-01-24 by Paul D. DeRocco
As usual, I m setting up a Digital Chroma in a hotel room near the NAMM show. If anyone is there, and would like to play it, email me personally at the address
2019-01-22 by btmckee9@...
Hi. I m Fetz s EE friend, Brian. We were able to reproduce the quaver issue with the scratch pad. I suspect the issue is power related based on what Paul
2019-01-21 by David Clarke
... Further to Paul s recent note (and just to clarify) - is it confirmed that the behaviour occurs on all voice patches and is also seen when using a scratch
2019-01-21 by Paul D. DeRocco
... If the oscillators are all over the place, it may be a problem with the DAC, or with a power supply, in which case the pulse widths would be all over the
2019-01-20 by sonicalliance@...
Hello Paul - Happy New Year! I was finally able to work on the Polaris with my computer engineering friend. We were able to solve the power reset issue. We
2018-12-15 by sonicalliance@...
Hello Paul, Thank you very much for this feedback. I have some work to do on this beauty! I have been swamped in holiday season as work. I have a good friend
2018-11-29 by paul@...
Hello I’ve managed to damage the top two keys on my Chroma Polaris, the B and high C. Two suppliers I’d found apparently don’t have the high C in stock.
2018-11-26 by Paul D. DeRocco
... When the system doesn t respond at all, it means the computer isn t running at all, or has crashed. There are two common causes of this in old Polarises:
2018-11-16 by sonicalliance@...
Hello everyone! My name is Jon, my friends call me Fetz. I was recently gifted one of the beautiful Chroma Polaris synths. I am having an issue with the synth
2018-10-30 by albrecht storz
I have no idea what CNF means. Home-brewed programs for AtariST and Polaris available here: http://www.rhodeschroma.com/?id=polarisataribankloader Gru Albrecht
2018-10-29 by lou@...
I have GenPatch on my Atari. does anyone have a CNF for the Chroma Polaris? What are people using to up/download Chroma P to their computers? Any suggestions
2018-10-26 by Paul D. DeRocco
... There s no reason not to burn the version 11 that s on the rhodeschroma.com site. See what part number your EPROMs are. If they re not listed in the burner
2018-10-26 by Paul Kavicky
Hello I’ve recently purchased an eprom programmer with the intent to burn new chips for my Chroma Polaris. Is a Hitachi HN27C64G-15 one that works? If not
2018-10-23 by Tracy Barber
That s good to know. Onward, Polaris warrior! Tracy ... On Fri, 10/19/18, conor.strachan@yahoo.com [chromapolaris] wrote:
2018-10-19 by conor.strachan@...
Thanks Paul will just use the originals! Makes it easy. I don’t know if it’s the EPROMs that’s the problem but i am running out of things it could be as
2018-10-19 by Paul D. DeRocco
... If the EPROMs are faded, that doesn t mean they re no good, so you should be able to erase and reprogram them and get another 20 years out of them. And use
2018-10-19 by conor.strachan@...
Any one got any pointers on burning EPROMs. I will just get an inexpensive eraser and burner off eBay. Can I use the original EPROMs inside my Polaris. Just
2018-10-12 by conor.strachan@...
Hi there Also after some EPROMS but have no Eraser or burner... If anyone out there wants to sell some let me know. Cheers Conor
2018-10-12 by paul@...
Mine is a Chroms Polaris II. The EPROMs day rev 5. Are they the same EPROMs as in a Chroma Polaris (v1)? If so I’m happy to buy an eprom burner and update to
2018-10-11 by Paul D. DeRocco
... If you have the older version of the power supply with the LED on it, the first thing is to see if the LED goes out when the instrument freezes. If that s
2018-10-11 by Tracy Barber
Hi - One thing that bothered me for about 2 weeks was this: The ribbon cables on the right side were touching the output board -or- coming in close contact.
2018-10-11 by paul@...
Many thanks for the help I’ve come to find the problem is bigger than I realized. When I first turn on the Chroma Polaris I can play a few notes and then
2018-10-09 by Paul D. DeRocco
... Just go through the settings starting on page 91 of the Owners Manual, and make sure they re all set the way you want. You d have to do this even if you
2018-10-09 by paul@...
Hello It looks like while setting up my current rig many of my synths got a midi blast of some sort. 3 of my synths behaved weirdly on the other side of this,
2018-09-08 by Paul D. DeRocco
... Look for cracks in the board. The left panel board is made out of cheap phenolic, and all it takes is a whack on some of the sliders and the board can
2018-09-07 by Andrew Sundaresan
Hi there Polaris folk, Longtime Polaris owner. Have one with a bad left panel (ICs replaced, still bad). Anybody have one available? Happy synthing, Andrew