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Subject: Re: [chromapolaris] OK - I Have Diagnostics Now And They Are Weird

From: alx dee <awedophile@...>
Date: 2018-06-03

Hi,

First time responding in forum. 

Check the DC voltages with the wires connected (under load) to circuit with power on. Voltages should be as per manual. 
Then check AC rms voltage on same output voltage and connections/conditions. You should see mV on outputs. You are checking to see if supply has bad/weak capacitors (in and outputs) as well as possibly other defective components. If you find excessive AC rms (ripple) then suggest you power down and replace all in/out capacitors or the whole power supply with a refurbished one if possible.

Lex


On Sun, Jun 3, 2018, 10:46 AM 'albrecht storz' albstorz@... [chromapolaris] <chromapolaris@yahoogroups.com> wrote:
 

Here a suggestion:
 
try to remote control your Polaris.
 
E.g. find an old Atari ST and run the programms which are delivered over the Polaris-Page.
 
 
Any other control over Midi may do it the same.
 
Schöne Grüße
Albrecht
 
Gesendet: Donnerstag, 31. Mai 2018 um 10:38 Uhr
Von: "adirondack_pc@... [chromapolaris]" <chromapolaris@yahoogroups.com>
An: chromapolaris@yahoogroups.com
Betreff: [chromapolaris] OK - I Have Diagnostics Now And They Are Weird
 

 

This is a LONG message with test results:
 

These were all done sequentially, 1 after the other in the Diagnostics section.  These are exactly the same issues I was having before reseating / checking the Synth so no new problems crept in.

 

Removed top left, top right boards.

Removed power supply.

Reseated all connectors.

Tightened all screws.

Tightened all jumpers.

Removed keyboard.

Reseated ribbon cables and made sure they were aligned.  No tears, etc.  New face plates.

Checked for bad cables / connections.

Did not check board trace for anomalies.

Batteries are brand new.

Did not remove transformer and anything in that corner.

 

      Green cable from headphones is attached to power supply but nothing else.  Paul D. mentioned using the brown wire from back board harness instead.  What do I do with this cable?  Ground it somewhere?

 

Changed startup patch, it was going to I 10 and that was always weird.

 

Starting Diagnostics:

 

1) Scratch patch worked.

2) Channel enable worked on all 6 channels.

3) Tried playing with Pulse on the Oscs but it just gave "effect" - was it suppose to turn off the Osc?

4) LF D 2 - Revision 5.  Poop.

5) LF D 3 - All LEDs light up.

6) LF D 4 - LED went on at max Master volume.

7) LF D 12, STOP: Did NOT try.  Already in RESET mode from before.

8) LF 10: LED lit up and it honked.  No MIDI set up at the moment.

9) LF 11: LED did not go on and I heard a click.  Had to power off / on.

10) LF 12:  LED did not go on and I heard a click.  Had to power off / on.

 

At this point, heat sink is getting warmer...

 

11) Noticed Bank B had organ sounds which it should not.  If not mistaken, it should have scratch patch because I previously did a RESET.

12) Tried to go through all of "A" Bank using the numbers.  Started each at A1 and proceeded through all.  Results:

 

      A1 - OK

      A2 - OK

      A3 - Piano?

      A4 - OK

      A5 - OK

      A6  - OK

      A7 - Honk, then went there to A7.

      A8 - Moved to G 8

      A9 - Moved to H 9

      A10 - Moved to I 10

      A11 - No LED, Click and stayed on A1 - no sound.  Turn off / on.

      A12 - No LED, Click and stayed on A1 - no sound.  Turn off / on.

 

At this point, frustration starts to set in.   I think I need to focus on adjustments or some new part(s) in the Synth. 

This is where I ask you the questions about where to go next.  I have done the preliminary work and am not afraid to go further, but don't know if I'm wasting time here.

 

13) LF A 1 - 5 seemed to work.  2 gave me a click.  5 gave me a honk.

14) LF B 1 - 6 seemed to work without issue.  

      7 gave a honk and went to flashing "F".

      8 gave a honk and went to G 8.

      9 gave a honk and went to H 9.

      10 gave a honk and went to I 10.

      11 gave a click and went poof - locked up.  Turn off / on.

      12 gave a click and lit up B 1 - 3.  Locked up.  Turn off / on.

 

Sheesh...  Warmer!

 

Press "A" 2 - 12 light up.

Press "B" 2 - 6 light up.

Press "C" and "A" stays on.

Press "D" and "A" stays on.

Press "E" and "A" stays on.

Press "F" and "A" stays on.

Press "G" and "A" stays on.

Press "H" and "A" stays on.

Press "I" and "A" stays on.

Press "J" and "A" stays on.

Press "K" and "A" plus 2, 8 - 12 stay on.

 

I think this sucker is bipolar.  No pun intended.  What's funny is that the presets play fine!  However many different ones I can scrape out of it, other than scratch patch.  LOL!

 

Any ideas?

 

Tracy