Korg Forums

korg_nikos · Posted: Tue Oct 30, 2007 9:47 pm Post subject:

Hi Sharp,

I have done all these you mentioned (except enter +5 on boot up) I needed to test sth else before. I have also cleaned the S-Ram using Enter+0 on boot up and loaded factory data from "fresh" downloading from official korg site. Nothing but the Solo-Tri option is installed in my trinity. My audio output is tested and works fine. All outputs of my Trinity work correctly. Loading factory data didn't result in anything. I have also formatted two new floppies and loaded 2.41. Still Nothing

I need your attention from here and below
Here is some update that you may find interesting.

I decided to test the synth just after initialization (enter+0). I whipped out all programs and did not loaded anything. So all my programs and combis now read Initl Program and Combi.

Then i entered program mode and selected S bank
000: Initl Program S000.

I hit edit and select OSC Basic (Second tab on the bottom)

Highlighted was the OSC Set option 01: Standard/Standard.
This is the first type of Osc Set. I have selected all osc sets(1,2,3,4,5,6,7,8,9,10,11,12)

1: Standard/Standard to 12: Pluck/--- (Like in moss board Brass Reed and Pluck are double oscilators that's why you don't see a second oscilator in these oscilator sets (10, 11, 12)

Anyway what really matters is that some models (oscilators sets) are noisy.

These are Oscilator Sets 8 AND 9

Meaning Osc Sets VPM/VPM and VPM/Modulation respectively.

All the others (1,2,3,4,5,6,7,10,11 and 12) work just fine.

Please notice that the noisy osc sets are the ones that employ Variable Phase Modulation (VPM) only as Primary Oscilator.

03 Standard/VPM
and
06 Comb Filter/VPM
which employ VPM algorithm as secondary oscilator work just fine.

So i guess that every sound of plus that uses Osc Set 8 and 9 which employ VPM as a primary oscilator sounds noisy. And also every combi that employs an S program based on VPM model as primary oscilator sounds noisy as well

After that i guess that the problem that occurs is not due to corrupted pcg's or lousy floppies.

Still having the synth initialized, and not loaded with any pcg (factory or user-edited) and proceeding to turning on's and off's solves the problem temporarily. But turning that on again brings the problem once more.

Really makes me wonder!!!!???!!!

I will say that again!
I have tested the above with more than three solo-tri boards that worked fine in other trinities but not in mine

Even my solo-tri board works fine if installed in other trinities.

So i guess solo-tri is not the issue over here.

Any comments?

Nikos

Sharp · Posted: Tue Oct 30, 2007 10:31 pm Post subject:

Ok so we know the board works, and your Trinity has been memory flushed.
Turning on and off the power can fix the problem, meaning this is as I've always believed, not related to an OS.

Ok, here me out here Smile

With a dieing capacitor, a cold start often does not go down well as the capacitor is completely drained of power, and so its placed under the the greatest strain to get where it should be, where a pre-charged one even if it's semi-faulty does this with very little effort.

Hence, you turning off an on the power fixes the problem. Fully really that a related $1 capacitor could easily be te cause.

I seriously don't believe this is OS related. What do you think ?.

You can put this suggestion to KORG too if you like to see what they think.

Regards.
Sharp.
_________________

korg_nikos · Posted: Tue Oct 30, 2007 10:44 pm Post subject:

Being an electrical engineer as well apart from musician I totally agree with you.

Lets forget about this OS issue cuz i seriously think i was misinformed by Greek "wise guys" that "know all about trinity".

The issue here is why this noise comes from VPM as Primary Oscilator only in Osc Set?

This capacitor you suggest, where it might be located? Since all solo-tri boards that i have checked operate normally when installed in other synths, (including my solo-tri as well), the problem is not in the tri-solo. So it might be either on PSU board (Power Supply Unit) or on Motherboard. Am i correct?

Unfortunately I don't have any PCB drawings of the trinity.

I have also sent an updating e-mail to Korg USA (Product Support).

Mr. Brian Rauth deals with me but i don't know if he is the most suitable person to deal with such enquiries.

Sharp · Posted: Tue Oct 30, 2007 11:32 pm Post subject:

korg_nikos · Posted: Wed Oct 31, 2007 1:00 am Post subject:

korg_nikos · Posted: Wed Oct 31, 2007 11:49 pm Post subject:

Hey guys...guess what!!!!

Yup you are right...!!!!

I have made it!!!

Trinity now operates 100%

Thanks for your valuable help.

Cheers

Nikos

Bazz02 · Posted: Thu Nov 01, 2007 6:39 pm Post subject:

Enjoy,

Bazz

korg_nikos · Posted: Thu Nov 01, 2007 6:48 pm Post subject:

Thanks Bazz,

I have replaced the motherboard PCB KLM-1820 and it worked just fine.

I was very lucky cuz i managed to find the specific spare from a trinity which was unused because of display and power supply fault. It's user has already bought another keyboard so he gave me the spare to check my trinity just for free!!! Fortunately it worked.

Thanks and Regards

korg_nikos · Posted: Sat Nov 03, 2007 10:14 pm Post subject:

Hi

5 days now from motherboard replacement and trinity operates 100% as it should be.

Actually i am sending this reply cuz i forgot to thank Sharp. (Shame on me!!!)

Thank you Sharp. I appreciate your help.

Cheers