Roland JX-8P: Detailed Service, Repair + Demo Track~

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Күн бұрын

Please join us while we sort through this Roland JX-8P from 1985! These synths are one of the few vintage analog synthesizers that you can still find for reasonably low prices. They have some common issues; we address a few of in this video. The 8p has a warm buttery sound and they are capable of beautiful analog strings and pads. The 8p would be a fantastic addition to any vintage synth enthusiast's studio!
The background music & demo track using this synth @ the end are also all original content!
This is our very first video, so please like and subscribe if you appreciate this type of content. We'd love to continue doing more, but each of these takes an incredible amount of time and effort. We are just two extremely passionate synthesizer enthusiasts; these videos are made as we have spare time. Your support would be greatly appreciated!
Additional Caveat: This video is for demonstration purposes only. Proceed at your own risk & liability.
#VintageSynthesizerSolutions
www.sacramentosynthesizers.com
www.jeffreylatour.com/
0:00 Intro
0:14 Repair Plan Overview
0:46 Safety Briefing
1:26 Opening the JX-8P
2:43 Internal Circuit Overview
4:48 Removing the Voice Board
7:39 Prepping/Cleaning the Voice Board
9:35 Checking the Backup Battery's Voltage
10:40 Cleaning Jacks w/ Contact Cleaner
13:01 Removing the Key Bed
15:06 - Key Bed Overview
16:11 Key Contact Cleaning
17:48 How to Remove the Keys
22:45 The Aftertouch Strip
24:14 Addressing the Rust on the Chassis
25:22 Bushings & Lubrication
29:00 Putting the Synth Back Together
30:25 Demo Track

Пікірлер: 33

@jkuebler89 3 жыл бұрын

Very cool, nice work! Educational, informative, entertaining. Dig the intro as well. You've earned yourself sub.

@VintageSynthesizerSolutions 3 жыл бұрын

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!

@charislinos 2 жыл бұрын

I like vintage restoration cause you can make your instrument handmade and even modify it to your taste !

@JorbLovesGear 3 жыл бұрын

Nice work! I'm jealous of videos made with the assistance of a camera operator. Hope to see more from you!

@SacSynths_Jack_Z 3 жыл бұрын

TY kindly!

@Ratkill Жыл бұрын

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!

@robinsutcliffe-video_art 3 ай бұрын

wow that's a great find! Congratulations

@garvinkelly 2 жыл бұрын

i saw one at the pawn shop yesterday and now I feel more prepared to ask about it. Thanks

@samplerhi-tech9844 2 жыл бұрын

amazing video!!!

@rlgrlg-oh6cc 2 жыл бұрын

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.

@VintageSynthesizerSolutions 2 жыл бұрын

Great idea, thanks for the tip!

@JulesFox 3 жыл бұрын

Well done on launching the new channel :)

@VintageSynthesizerSolutions 2 жыл бұрын

TY!

@davidsquires8462 11 ай бұрын

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.

@vintagesynthesizers 7 ай бұрын

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.

@rolfjohansen5376 7 ай бұрын

does jx-8p got analog filter?

@MichaelMartinez-mr3uy Жыл бұрын

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!

@culturedslob 2 жыл бұрын

The aftertouch strip can just be pulled away? How is it reapplied? Simply sandwiched back together? Thanks!

@VintageSynthesizerSolutions 2 жыл бұрын

Yes, use a heat gun or blow dryer during reapplication to ensure resealing.

@err4071 2 ай бұрын

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.

@michaeltharrington8858 7 ай бұрын

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.

@XxChrisxXBedofRazors 2 жыл бұрын

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!

@VintageSynthesizerSolutions 2 жыл бұрын

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.

@xfloodcasual8124 Жыл бұрын

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.

@mass-1128 2 жыл бұрын

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?

@VintageSynthesizerSolutions 2 жыл бұрын

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.

@niceheartwhitesuit Жыл бұрын

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 Жыл бұрын

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!

@niceheartwhitesuit Жыл бұрын

@@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!

@VintageSynthesizerSolutions Жыл бұрын

@@niceheartwhitesuit My pleasure, vintage synths are much less stressful when you can do repair work yourself!😅

@ferenclucas7280 Жыл бұрын

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.

@ingoodmusic 2 жыл бұрын

Why put grease?

@markfreedman2470 Жыл бұрын

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.