I repaired an old drum machine and made a video. More?

Any music gear discussions that don't fit into one of the other forums.

Moderators: lisa, Kent, Joe.

Post Reply
äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

I repaired an old drum machine and made a video. More?

Post by äggmedskägg » Sun Jun 09, 2019 2:25 pm

I got some stuff that need repairs/refurbs, and I finally got around to it. I made a blog post last time (Tascam M-2524 mixer) but that was a lot of work. So I tried a video this time, I like that better.



Now, question is, does anybody want a video for any of the other things I need to fix? It's a Fostex A-8LR tape multitrack, a Roland Space Echo, an OSC Oscar, and I think my TR-909 needs an overhaul, or at least a proper clean. :-)

Tell me if any of that is of interest.

User avatar
spacessound
Wiggling with Experience
Posts: 306
Joined: Tue Aug 13, 2013 3:46 am
Location: Berlin
Contact:

Post by spacessound » Sun Jun 09, 2019 5:09 pm

always love seeing inside old gear :nana:

User avatar
Shrigg
Common Wiggler
Posts: 197
Joined: Fri Oct 28, 2016 12:24 pm
Location: Traverse City, MI

Post by Shrigg » Sun Jun 09, 2019 5:47 pm

I'd love to see an OSCar teardown video
Oberheim Xpander w/ Oddernmart Xpander Xpansion / Octatrack / Digitakt / virus ti2 desktop / TT-303 mk.2 / TT-606 / Nord Lead 12 voice expanded / Emax II rack / blofeld keys / micromonsta / little phatty stage 2 [for sale] / moxf8 / minilogue / bs2 / OP-1 / organelle / pocket piano / axoloti + push / mfb-522 / circuit / volca sample

calaveras
Super Deluxe Wiggler
Posts: 3495
Joined: Sun Dec 21, 2014 2:02 pm

Post by calaveras » Sun Jun 09, 2019 6:35 pm

those Muji screwdrivers are great.

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Post by äggmedskägg » Sun Jun 09, 2019 10:18 pm

calaveras wrote:those Muji screwdrivers are great.
Yeah, best ones I've ever had. After the box got old and broke on the first ones I got in the 80's (or maybe early 90's), I bought another set a few years ago. :-)

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Post by äggmedskägg » Sun Jun 09, 2019 10:23 pm

Shrigg wrote:I'd love to see an OSCar teardown video
OK, I will definitely do that one then. It's amongst the last on my list, because it's a big project and I'm also worried that I'll break it. :-) But it'll come.

ExtrasensoryPerception
Common Wiggler
Posts: 83
Joined: Mon Nov 21, 2016 11:19 am
Location: Berlin

Post by ExtrasensoryPerception » Mon Jun 10, 2019 2:42 am

Lovely video. i'd enjoy more...always curious about what's inside the box!

hw408
Common Wiggler
Posts: 232
Joined: Sun May 27, 2018 4:42 pm
Location: United States

Post by hw408 » Mon Jun 10, 2019 1:29 pm

TR909 video would be very nice. :hail:

User avatar
CosmicFlight
Common Wiggler
Posts: 114
Joined: Thu Mar 06, 2014 2:55 pm
Location: France

Post by CosmicFlight » Mon Jun 10, 2019 3:03 pm

Interesting video 8-)
Yeah 909 and Space Echo please

calaveras
Super Deluxe Wiggler
Posts: 3495
Joined: Sun Dec 21, 2014 2:02 pm

Post by calaveras » Mon Jun 10, 2019 4:14 pm

I should have made a vid of the TSR24 I upgraded over the weekend.
I was surprised that it was all through hole, and had a number of whacky circuit revisions that involved passive components and trimmers just kind of stuck together like you might see inside an electric guitar, or an amp from the 60's. Odd to see that on a digital multieffects from 30 years ago.
But it was super easy to swap the crystal and the firmware.

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Post by äggmedskägg » Thu Jun 13, 2019 4:42 am

I was surprised that it was all through hole
Yeah, surface mounted things were only used for real mass production things back then. Or if you needed it to be small. By the mid 90's the company I worked for then started making SMD boards even for the small run stuff we were doing, because by then you couldn't get processors in DIP packages any more. Too many pins. :-)

TR909 video would be very nice.
Will do. That will take time though, and markusfuller already did a good one.


User avatar
monads
Super Deluxe Wiggler
Posts: 1928
Joined: Thu Mar 26, 2009 11:05 am
Location: Odyssey Island
Contact:

Post by monads » Thu Jun 13, 2019 9:19 am

One issue to be cautious of when servicing the TR-909 is the connector cables that are connected to the keypad/buttons PCB. Roland soldered one end of the cables directly to the board. This is not normally a problem except from old age and when you try to service this board the cables can get in the way and worse become unsoldered!!! Trying to resolder them can be a nightmare. I actually removed them. Soldered connectors (like on the main PCB) to the board and made a connector on the other end of the existing cable. So now the cables can easily be disconnected and reconnected!

User avatar
jabberwalky
Common Wiggler
Posts: 138
Joined: Sat Jan 21, 2012 6:44 pm

Post by jabberwalky » Thu Jun 13, 2019 11:44 am

Cool video! All those trimmers! Great sound on the early Vermona stuff. I've had some experience repairing the Korg Minipops3/SR-120. Definitely not for the faint of heart. Early Korg has a very "garage built" feel.

I'm all for anyone making repair videos!

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Post by äggmedskägg » Mon Jun 17, 2019 2:06 am

monads wrote:One issue to be cautious of when servicing the TR-909 is the connector cables that are connected to the keypad/buttons PCB.
Thanks for the headsup! If they cause any trouble I'll do the same!
jabberwalky wrote:Early Korg has a very "garage built" feel.
Somehow I'm not surprised.

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Post by äggmedskägg » Fri Jul 05, 2019 3:11 pm

Next video is up now, short and perhaps not very interesting.



Working on the Fostex A8-LR 8 track now, that will be more substantial, but will take a few weeks.

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Re: I repaired an old drum machine and made a video. More?

Post by äggmedskägg » Sun Feb 02, 2020 7:05 am

Well, I got distracted, mostly by the realization that the OSC OSCar's battery could possibly be leaking, but also by the Fostex missing a lot of screws, so I worked on the OSCar instead. It's a nightmare :help: , and amateurs like me shouldn't do anything more than replacing the battery.
It's not done, but I got three videos up. There may be more. :cry:




User avatar
thispoison
Ultra Wiggler
Posts: 962
Joined: Wed Jan 02, 2013 11:26 am

Re: I repaired an old drum machine and made a video. More?

Post by thispoison » Sun Feb 02, 2020 8:26 am

Many thanks for the OSCar videos - really enjoyed them and appreciate the effort.

I'm grateful that you've made me give myself a shake and remind myself that building a few diy kits doesn't mean I have the skills to work on my own OSCar.

After the first video I was thinking of giving it a go, but the second two were a wake up call for me.

Best of luck getting yours back to full health. :guinness:
Where have I seen you before?
Same place you saw me, I expect.
I've got a good face for memories.

https://soundcloud.com/thispoison-1

User avatar
doombient.music
Super Deluxe Wiggler
Posts: 1132
Joined: Mon May 02, 2011 5:23 pm
Location: the city that doesn't exist, germany
Contact:

Re:

Post by doombient.music » Sun Feb 02, 2020 1:44 pm

Shrigg wrote:
Sun Jun 09, 2019 5:47 pm
I'd love to see an OSCar teardown video
Much more than this I'd love to watch the OSCar being re-assembled again, with no parts being left at the end...

Stephen

äggmedskägg
Learning to Wiggle
Posts: 45
Joined: Tue Mar 14, 2017 2:09 pm

Re: Re:

Post by äggmedskägg » Sun Feb 09, 2020 8:30 am

thispoison wrote:
Sun Feb 02, 2020 8:26 am
Best of luck getting yours back to full health. :guinness:
Thanks!

doombient.music wrote:
Sun Feb 02, 2020 1:44 pm
Much more than this I'd love to watch the OSCar being re-assembled again, with no parts being left at the end...
I *might* have enough footage of assembling it to make that happen, but I'll make no promises.

Post Reply

Return to “General Gear”