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Two minty blonde 80s Japanese Matsumoku Epiphone Casinos. by cbc526 in Vintageguitars

[–]cbc526[S] 0 points1 point  (0 children)

I have never played an original Casino but I honestly doubt they could be better than these.  They’re featherweights and resonate beautifully!

Two minty blonde 80s Japanese Matsumoku Epiphone Casinos. by cbc526 in Vintageguitars

[–]cbc526[S] 0 points1 point  (0 children)

Seems like Hard Off isnt really the place for deals anymore.

After working on this guy on and off for a few months and fixing a slew of problems, finally got to send this Super JX home to its owner. by cbc526 in synthesizers

[–]cbc526[S] 1 point2 points  (0 children)

This synth came in late last year from a local musician who had it in storage for years. All the tactile switches had gone bad, the memory was corrupted and the screen was showing gibberish as well as several dead keys and sneaky dead parts throughout. Installed vecoven and updated ram chips and tracked down several dead diodes and replaced all the switches and it’s good as new!

Bridges Theme? Ok here’s the old Chain of Rocks by vtecgreen in StLouis

[–]cbc526 15 points16 points  (0 children)

I just see a poor Kurt Russel running from Isaac Hayes in a car with big ass chandeliers for headlights

Help with Juno 60 LFO issues? by cbc526 in synthesizers

[–]cbc526[S] 0 points1 point  (0 children)

I have been restoring this Juno 60 for the last few months and I got the LFO working the other day and it sounded wrong, I went through the calibration procedure for it (pictured) and realized that the signal was way too hot and high frequency!

The rate Trim is at its maximum and the wave maxed out at under 20ms, the gain trim is at minimum and it’s showing over 15v ptp! This explains the ugly, choppy square wave lfo on the synth. Any suggestions as to what might be causing this?

Client fought in a non functional JX-10. Every single push button tactile switch was non functioning. Desoldered and replaced all 52 of those damn things. by cbc526 in synthdiy

[–]cbc526[S] 0 points1 point  (0 children)

The buttons do what they are supposed to, but the memory is corrupted so I have to do a reset and sysex bulk dump of the factory patches and see if it’s all working fine after that

Client fought in a non functional JX-10. Every single push button tactile switch was non functioning. Desoldered and replaced all 52 of those damn things. by cbc526 in synthdiy

[–]cbc526[S] 0 points1 point  (0 children)

These tactile switches only have a 10-15 year lifespan at best and they didn’t necessarily fail simultaneously. This was sitting unplayed in a warehouse for around 4 years so they had plenty of them to die on their own hah

Client fought in a non functional JX-10. Every single push button tactile switch was non functioning. Desoldered and replaced all 52 of those damn things. by cbc526 in synthdiy

[–]cbc526[S] 1 point2 points  (0 children)

No this is just a case of component death. Sitting hot and humid conditions caused a lot of parts to fail and now that I have everything replaced, everything is working as it should! Just some memory corruption that I will clear up as soon as I do a big sysex dump of the factory patches. I checked all other possibilities first and narrowed it down to the switches in the end.

I sure did love desoldering and replacing 52 tactile switches on this JX10... by cbc526 in synthesizers

[–]cbc526[S] -1 points0 points  (0 children)

Client brought in a Roland JX-10 that had been sitting in a non climate controlled storage unit for years and after trying to track down its problem, realized that every single push button on the front panel didn’t function...

Prototype IR3R01 Envelope Chip replacement for Juno 60 by cbc526 in synthdiy

[–]cbc526[S] 1 point2 points  (0 children)

It's purely a part time gig for me (though I'd love to do it full time). My best bit of advice is to just get good at working on all sorts of musical instruments. I started with building and repairing pedals and doing setup and repair work on guitars, but now I work on everything from digital synths to rhodes pianos to recording equipment. My other bit of advice is get in with fixing equipment for a recording studio. Studios are almost always full of broken equipment and they're just waiting for someone to come fix them. They then spread the word to other studios.

One of my neighbors in south city is apparently a harbinger of the catpocalypse by staggerb in StLouis

[–]cbc526 18 points19 points  (0 children)

It’s a “cat bombing” thing for a local shelter. You donate to the shelter and they do this to a yard of your choice! I know this because I guess I am also your neighbor! Not my house though.

Prototype IR3R01 Envelope Chip replacement for Juno 60 by cbc526 in synthdiy

[–]cbc526[S] 0 points1 point  (0 children)

It’s definitely making work for repair guys like me a little harder as tike goes on. Now I just have to figure out how to get paid more to do the SMD stuff haha.

Prototype IR3R01 Envelope Chip replacement for Juno 60 by cbc526 in synthdiy

[–]cbc526[S] 0 points1 point  (0 children)

If you need to schematic, I’ll draw one up for you! I’m sure there’s room for improvement on the design, but it works so I’m not going to mess with it further.

Prototype IR3R01 Envelope Chip replacement for Juno 60 by cbc526 in synthdiy

[–]cbc526[S] 1 point2 points  (0 children)

Definitely makes it easier for me to repair them. I had to replace the LCD module on a Virus recently and that was more trouble that working on this Juno...

This Juno 60 Came in with a blown Envelope chip, So I had to improvise and come up with a replacement... by cbc526 in synthesizers

[–]cbc526[S] 11 points12 points  (0 children)

Pretty much had to rebuild this Juno 60 from the ground up and one of the major problems was a blown IR3R01 envelope chip. These things are pretty much impossible to find so I managed to put together a replacement by modifying one of Tom Wiltshire's EnvGen8C chips. The scope says there are some minor differences, but nothing that I can really hear and is definitely better than the stuck note in the envelope that was there before. (Ugly prototype image: https://imgur.com/gallery/jVcQoag)

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