Wow I appreciate this so much. I've been in the market for an analog synth and this morning my neighbor tossed one of these in the trash! Looks like they stored it outside for some insane reason, but the boards look alright and its time to tear this thing down! Thanks!
Thank you genuinely! This is a huge passion project for us. Your support is very much appreciated. We hope there is enough interest to allow us to be able to do many many more of these videos, as well as some comprehensive demos of rare and unique synths like the Octave-Plateau Voyetra 8!
I take a marker and draw a wide black stripe down the side of all of the black springs, before taking them off. I always do this. No worry about whether they are the same or not.
Thank you for the informative video. I've got a late model (SN 570412) JX-8P which I am currently repairing. The power supply -15v had failed so I checked all semiconductors (and caps) on the power supply board and replaced the M5230L dual tracking voltage regulator. I removed all the keys and springs and cleaned all the key switch contacts. Reassembly was straightforward. The key aftertouch was working but suffered from low gain. I increased the aftertouch gain by replacing the op-amp feedback resistor on the Volume Board with a 50% higher value. However, if I was confident I could disassemble the aftertouch strip to clean it and then reassemble it, then I would do that to see how much that helps. I don't think you mentioned what was involved to reassemble the aftertouch sensor. Would you please explain how the top and bottom of the sensor strip was held together and what you did to reassemble it? Thank you. I am currently trying to track down why two of the voices don't sound "full" and am slowly figuring out the internal logic while looking at signals on my mixed signal oscilloscope.
Hi early in the video you said be sure the capacitors are discharged before opening it up. Is that as simple as turning on/off the power switch while it's unplugged? Or is there another way to do it? I'm getting ready to crack open my JX-8P to try and fix the loose outputs, but I don't wanna get shocked!
Heyo! Any chance you can help me out and tell me what size screws those are on the sides of the case? I just bought a used JX-8P but it's missing the 6 screws that hold the case together.
What are cold joints? My JX-8P has had crackling issues. I have to be moving my TRS cables in at certain position to get a clear audio. But it takes my time away to get it right 😫 I've not tried the Deoxit cleaner yet.. Thanks for posting this vid!
Cold joints are cracked joints. They need to be "reflowed" with a soldering iron. Your 8p definitely has some cracked solder joints on the output jacks. Deoxit will not help, but it should be an easy fix with a soldering iron.
This might be a ridiculous question, but if I were to clean the oxidation on my aftertouch strip as this video demonstrates, but then provide a thin veneer of deoxit fader lube, would that maintain conductivity and help delay future oxidation? Or is that a very dumb thing to do because of possible reactions between the deoxit and other materials in the aftertouch strip? I just wonder if it's worth doing the cleaning when it could just oxidize in another decade and need to be done again...
@@VintageSynthesizerSolutions :-) I figure if no one has come up with a better fix in nearly 40 years it probably doesn’t exist, but hey sometimes dumb questions yield effective results! Thanks for the super helpful vid. It’s helped me get my JX-8p in much better shape and probably saved me $ to boot!
Question: I notice that most synth guys don't cover this topic, but how do you safely remove/clean scratches from a synth panel, especially on vintage gear?
Depends on the type and finish of the front panel. I often use ISO rubbing alc. unless its a mid-late 80s plastic synth with a thin paint coating like the Korg DW-8000. To polish out scratches, I often use automotive products like Nu-Finish Scratch Doctor, etc.
make sure to wipe off deoxit with alcohol. it does terrible things to sound, from an oily layer left behind. you'll hear a difference after removing it with isopropyl.
Deoxit Red is only good for switches and for tactile buttons. It is terrible to use on potentiometers including the ones in the pitch bend assembly. need to use Deoxit green, fader lube for sure for pots and for sliders.
Great Video except the background synthesizer music. Having a musical intro or ending to a technical video is fine. However using spooky horror movie music in the background distracts from the technical knowledge and wisdom you are imparting. I don't need it to find out that using pads to clean the board is better than cotton swabs. Watch other service related videos and you will see what I mean.
Wow I appreciate this so much. I've been in the market for an analog synth and this morning my neighbor tossed one of these in the trash! Looks like they stored it outside for some insane reason, but the boards look alright and its time to tear this thing down!
Thanks!
wow that's a great find! Congratulations
Very cool, nice work! Educational, informative, entertaining. Dig the intro as well. You've earned yourself sub.
Thank you genuinely! This is a huge passion project for us. Your support is very much appreciated. We hope there is enough interest to allow us to be able to do many many more of these videos, as well as some comprehensive demos of rare and unique synths like the Octave-Plateau Voyetra 8!
i saw one at the pawn shop yesterday and now I feel more prepared to ask about it. Thanks
I like vintage restoration cause you can make your instrument handmade and even modify it to your taste !
Nice work! I'm jealous of videos made with the assistance of a camera operator.
Hope to see more from you!
TY kindly!
❤
amazing video!!!
I take a marker and draw a wide black stripe down the side of all of the black springs, before taking them off. I always do this. No worry about whether they are the same or not.
Great idea, thanks for the tip!
Well done on launching the new channel :)
TY!
Thank you for the informative video. I've got a late model (SN 570412) JX-8P which I am currently repairing. The power supply -15v had failed so I checked all semiconductors (and caps) on the power supply board and replaced the M5230L dual tracking voltage regulator. I removed all the keys and springs and cleaned all the key switch contacts. Reassembly was straightforward. The key aftertouch was working but suffered from low gain. I increased the aftertouch gain by replacing the op-amp feedback resistor on the Volume Board with a 50% higher value. However, if I was confident I could disassemble the aftertouch strip to clean it and then reassemble it, then I would do that to see how much that helps. I don't think you mentioned what was involved to reassemble the aftertouch sensor. Would you please explain how the top and bottom of the sensor strip was held together and what you did to reassemble it? Thank you.
I am currently trying to track down why two of the voices don't sound "full" and am slowly figuring out the internal logic while looking at signals on my mixed signal oscilloscope.
Recently I cleaned very carefully the aftertouch strip (it was very oxydised) and there was no result after... I must try the way with resistor.
does jx-8p got analog filter?
Should I go for a new psu?
Hi early in the video you said be sure the capacitors are discharged before opening it up. Is that as simple as turning on/off the power switch while it's unplugged? Or is there another way to do it? I'm getting ready to crack open my JX-8P to try and fix the loose outputs, but I don't wanna get shocked!
Heyo! Any chance you can help me out and tell me what size screws those are on the sides of the case? I just bought a used JX-8P but it's missing the 6 screws that hold the case together.
I have one of these and i have noticed that the scews
underneath the unit get hot around 40 degrees C ish
is that normal.
The aftertouch strip can just be pulled away? How is it reapplied? Simply sandwiched back together? Thanks!
Yes, use a heat gun or blow dryer during reapplication to ensure resealing.
What are cold joints? My JX-8P has had crackling issues. I have to be moving my TRS cables in at certain position to get a clear audio. But it takes my time away to get it right 😫 I've not tried the Deoxit cleaner yet.. Thanks for posting this vid!
Cold joints are cracked joints. They need to be "reflowed" with a soldering iron. Your 8p definitely has some cracked solder joints on the output jacks. Deoxit will not help, but it should be an easy fix with a soldering iron.
This might be a ridiculous question, but if I were to clean the oxidation on my aftertouch strip as this video demonstrates, but then provide a thin veneer of deoxit fader lube, would that maintain conductivity and help delay future oxidation? Or is that a very dumb thing to do because of possible reactions between the deoxit and other materials in the aftertouch strip? I just wonder if it's worth doing the cleaning when it could just oxidize in another decade and need to be done again...
Never tried that before, but my gut says it is probably not a great idea. If you do try, report back in 10 years 😆 Thx for watching!
@@VintageSynthesizerSolutions :-) I figure if no one has come up with a better fix in nearly 40 years it probably doesn’t exist, but hey sometimes dumb questions yield effective results! Thanks for the super helpful vid. It’s helped me get my JX-8p in much better shape and probably saved me $ to boot!
@@niceheartwhitesuit My pleasure, vintage synths are much less stressful when you can do repair work yourself!😅
Ah good ol oleic acid and naptha to the rescue. 😉
Question: I notice that most synth guys don't cover this topic, but how do you safely remove/clean scratches from a synth panel, especially on vintage gear?
Depends on the type and finish of the front panel. I often use ISO rubbing alc. unless its a mid-late 80s plastic synth with a thin paint coating like the Korg DW-8000. To polish out scratches, I often use automotive products like Nu-Finish Scratch Doctor, etc.
Why put grease?
make sure to wipe off deoxit with alcohol. it does terrible things to sound, from an oily layer left behind. you'll hear a difference after removing it with isopropyl.
Deoxit Red is only good for switches and for tactile buttons. It is terrible to use on potentiometers including the ones in the pitch bend assembly. need to use Deoxit green, fader lube for sure for pots and for sliders.
Great Video except the background synthesizer music. Having a musical intro or ending to a technical video is fine. However using spooky horror movie music in the background distracts from the technical knowledge and wisdom you are imparting. I don't need it to find out that using pads to clean the board is better than cotton swabs. Watch other service related videos and you will see what I mean.