Boss SY-1000 F.A.Q.
Started by steadystate, November 20, 2023, 06:36:30 PM
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Quote from: steadystate on November 20, 2023, 06:36:30 PMI'm trying to find a schematic for the GK-2a that specifically shows the 7 and 8 pin connectors leading to the 13-pin jack. I've searched the site, but every instance seems to have been removed. Can anyone direct me to this info? Thanks in advance.
Quote from: steadystate on November 20, 2023, 11:11:40 PMThanks for the replies. I made my own 13-pin jack/pcb replacement boards using EasyEDA/JLCPCB, one version for the GK-3 and another for the GK-2a. The boards for the GK-3 work, but the ones for the GK-2a don't. The schematic for the GK-2a version is attached. I apparently made an error on the pcb layout. But it seems to match the above diagrams (but not the conductor colors on the SYNTH-LINX chart). I think I need another pair of eyes.
Quote from: steadystate on November 21, 2023, 10:21:07 AMThose schematics are for the little 13-pin pcb's I made, and the first thing I did was check them with a multimeter. I'm beginning to suspect that my GK-2 preamp board is dead. I can't think of another explanation at this point.BTW, this isn't an external to internal conversion. I have internal kits in all of my guitars, mainly GK-3, but a single remaining GK-2a. The problem is that the 13-pin jacks wear out, so I made replacements. The hard part was sourcing 13-pin jacks with the screw-mount wings on them, which I finally found.My next project is to make my own preamp boards, considering Roland internal kits are over $400 in the US (four times the price as overseas), and Roland no longer allows overseas vendors to sell to the US. F#CK THAT. I can't see myself ever buying a new Roland product after that. It's actually cheaper to make them myself.
Quote from: gumbo on November 21, 2023, 01:13:58 PMNo offense meant...just pointing out a few things that I have come across in almost 30 years of playing about with this stuff.
Quote from: gumbo on November 21, 2023, 01:13:58 PMAs I said earlier, check also what is going on in the Mix Switch circuit...you could be inadvertently dumping all your signals to Ground instead of getting anything out of your 13-pin jack...find out what is happening to your Mag Pickup signal as well, that could possibly be a clue to the problem.
Quote from: gumbo on November 21, 2023, 01:13:58 PMI know the original Roland jacks wear out, that's exactly why I have been making alternative assemblies for over ten years that overcome the problem. BTW, the 'ears' on Synth-Linx Jacks use the same mounting bolt centers and diameters as those on the original Roland jacks, and in that way, suit straight forward retrofitting as well as making for much easier fitting in completely new installations.
Quote from: gumbo on November 21, 2023, 01:13:58 PMAgain, what is the known past history of your GK2A mainboard assembly?
Quote from: gumbo on November 21, 2023, 01:13:58 PMBut be aware that if you think you can just clone some part of a registered Roland design and get away with mass-production of your copy for retail sale, they will probably come looking for you....it's their way..
Quote from: Bluesbird on November 21, 2023, 03:21:02 PMOverseas sellers on Reverb often sell the kits at a cheaper price. https://reverb.com/item/32674207-roland-gk-kit-gt3-exp-divided-pickup-kit
Quote from: gumbo on November 22, 2023, 12:44:12 AMYeah ...Roland does what Roland wants...As far as Synth-Linx Jacks go, Elantric's post abovehttps://www.vguitarforums.com/smf/index.php?topic=36504.msg267985#msg267985has the link to the Sub-forum where the products were launched in 2013...they have been continually produced (and the range of models vastly increased) ever since.There are a few threads there that have talked about various applications that have been addressed over the years, and the standard range of products now are supplied to mainland USA customers via my Distributor in Arizona...custom units are supplied direct from Australia to order.Thank for your interest - more information can be made available via email on request to:email@example.comRegards,Peter