Sound only plays on left output

dholmes40 · Post by **dholmes40** » Tue Feb 15, 2011 11:39 am

Hi,

I have a Trinity V3 and lately I've noticed sound only playing on the left channel. I never noticed it before because I'd plug the 1/4 inch cable into the left mono port when playing live. But if I use the headphones jack, it only plays out of the left side. I also don't get sound if I plug into the right channel.

I tried resetting the keyboard (Holding Enter + turning on power). No change.

Any ideas?

synthjoe · Post by **synthjoe** » Tue Feb 15, 2011 12:33 pm

dholmes40 wrote:Hi,

I have a Trinity V3 and lately I've noticed sound only playing on the left channel. I never noticed it before because I'd plug the 1/4 inch cable into the left mono port when playing live. But if I use the headphones jack, it only plays out of the left side. I also don't get sound if I plug into the right channel.

I tried resetting the keyboard (Holding Enter + turning on power). No change.

Any ideas?

Make sure you back up all data from the instrument before reading further. Have you tried the diagnostics menu, as well? You can test all outputs independently and that should help you a bit further. ENTER+5 on power up is the key combination for diagnostics and it will wipe completely your Trinity's content.

dholmes40 · Post by **dholmes40** » Tue Feb 15, 2011 5:34 pm

I haven't tried that. Is it safe to run the diagnostics? I've heard horror stories but from other keyboards, not the Trinity.

I have my sounds/global settings backed up on disk.

billbaker · Post by **billbaker** » Tue Feb 15, 2011 7:00 pm

Someone will no doubt correct me if I'm wrong...

I believe the trinity and triton have a bit of a design flaw in that the output jacks "float" relative to the case. They're soldered to a board in the chassis. Rough treatment or time can leave you with a disconnect as the jacks get torqued fairly heavily during play, transport, and even just sitting with cable weight pulling on 'em.

I'm not sure this flaw would manifest in the headphones tho'. That may indeed be one for a diagnostic test.

But whether you self-test or send it to a shop the advice to back-up everything is good.

Any process that wipes the memory or just lets it die (like a battery change) should be preceded by one - or better yet 2 back-ups -- disc and PC.

BB

synthjoe · Post by **synthjoe** » Wed Feb 16, 2011 1:28 am

billbaker wrote:I'm not sure this flaw would manifest in the headphones tho'. That may indeed be one for a diagnostic test.

Not on the Trinity as far as I know. I'm not sure on the Triton - and in fact I have rarely seen reports of such problem for the Trinity whereas it is rather common for Triton.

I have ran diagnostics several times without any problems - be careful with your speakers and your ears, though! Sometimes high level signals are produced on the outputs. If everything is backed up safely then I'm confident you'll have no problems running the diagnostics. The last step of the diagnostics involves loading the original factory preset disk. I think you can insert any disk in fact, but not sure of that. It might be a good idea to have that disk handy, plus a blank floppy for running the drive test.

DCPete · Post by **DCPete** » Wed Feb 16, 2011 12:46 pm

http://www.korgforums.com/forum/phpBB2/ ... php?t=3556

Check this very forum... I to have a V3 & whilst not entirely cured, This problem is well documented & discussed. It's really just down to a little set of wires that run from front (Headphones) to back (L & R) that's the cause/cure of the problem...

Click link.

dholmes40 · Post by **dholmes40** » Wed Feb 16, 2011 2:37 pm

Awesome! Thanks. I will give it a try when I get some time.

gorkymate · Post by **gorkymate** » Fri Feb 25, 2011 3:41 pm

..Ok, but if you have DI-TRI option like I do, does it wipes also samples from flash rom??

synthjoe · Post by **synthjoe** » Sat Feb 26, 2011 2:33 pm

gorkymate wrote:..Ok, but if you have DI-TRI option like I do, does it wipes also samples from flash rom??

The flash option is PBS-TRI, is that what you've meant? I'm not sure but think that the samples will be erased (by running the diagnostics, not the cleaning of the pins), too. However, they can be saved on floppies before running the diagnostics, so it should not be a big issue. Did this answer your question?

keyplayer14 · Post by **keyplayer14** » Sun Jun 12, 2011 1:30 am

Hi, old thread I know, but in case it helps you (or anyone else!), I had a similar problem with my Trinity last year - it was cured by replacing the volume slider!

Madbit · Post by **Madbit** » Wed Apr 15, 2015 12:29 am

Sorry to necro this thread, but I just had this problem and I could simply solve it by going to the diagnostics (Enter+5 on startup) and running output tests. Then it magically fixed itself.

If I had to guess, there's probably a bug in the OS (2.4.1) that screws global panning, as it happened to me before but it was stuck just a little bit to the left.

Hope this helps somebody.

PS: Make sure you backup all your data before doing this.

jhulk · Post by **jhulk** » Thu May 14, 2015 1:59 pm

its also a known problem that the dual linear volume control sliders fail and if its also on the phones i would suspect this if the diagnostics dont work

the trinity does have floating phono,s the only mechanical protection is the solder pads and they do fail due to phono leads i fit 90 degree phono,s as they put less stress on the 1/4 inch jack phono sockets

its a design flaw in most of there synths even the dss1 suffer from it but easy fix reflow solder so that the cracks are no longer there

its a pity that they did not use like the ensoniqs nuts or brackets that take the stress

i have had to replace several sliders and they work good the sliders are still available from guitar parts and are about $8

cosmic19 · Post by **cosmic19** » Mon Mar 01, 2021 1:03 pm

Hi All, i had the same problem on my Korg Oasys 76. One left output was working and right output was very faint and was also causing a hum noise that i thought was coming form my active monitors or from my ext mixer. using process of elimination i found the fault.

jhulk Wrote: It's also a known problem that the dual linear volume control sliders fail"

Correct Sir. It was the Main Volume Slider that was causing the issue . so i took it out and cleaned it will Isopropyl alcohol and voila it worked. So anyone else having this problem should check this first,

C.

Vesa · Post by **Vesa** » Wed Oct 20, 2021 6:12 pm

DCPete wrote:http://www.korgforums.com/forum/phpBB2/ ... php?t=3556

Check this very forum... I to have a V3 & whilst not entirely cured, This problem is well documented & discussed. It's really just down to a little set of wires that run from front (Headphones) to back (L & R) that's the cause/cure of the problem...

Click link.

Yup, solved the left only sound on headphones. Got it right after replacing the floppy drive (driving belt become too stretched), I put some petrolium jelly on the pinky finger, just managed to rub the pins, it's tight.

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