Search found 19 matches

by DigitalMetal
Thu May 03, 2018 9:43 pm
Forum: Gear Services & Other Goods
Topic: Studio Electronic SE-1 external input
Replies: 5
Views: 3392

Re: Studio Electronic SE-1 external input

That's fantastic thank you very much I really appreciate it!
by DigitalMetal
Sun Sep 10, 2017 10:32 am
Forum: Gear Services & Other Goods
Topic: Custom-built multi-bank Roland M-256/M-512 memory cards
Replies: 466
Views: 176501

Re: Custom-built multi-bank Roland M-256/M-512 memory cards

I'm interested, (posting to follow thread).
by DigitalMetal
Sun Sep 10, 2017 10:21 am
Forum: Gear Services & Other Goods
Topic: Studio Electronic SE-1 external input
Replies: 5
Views: 3392

Re: Studio Electronic SE-1 external input

Never mind, I figured it out myself! There was a shortcoming in the above instructions, but now the internal noise is cancelled when external input is applied as expected. If there's any interest I can post instructions here on this and the faster ADSR attack modification as well. Very cool, yes I'...
by DigitalMetal
Sun Sep 10, 2017 10:12 am
Forum: Gear Services & Other Goods
Topic: Roland D50 Parts - UK
Replies: 7
Views: 3551

Re: Roland D50 Parts - UK

Hi could whoever bought the motherboard get in contact with me please?
I need your old "broken" one as i need one of the components I cant find anywhere else.

Thanks!
by DigitalMetal
Sat Sep 09, 2017 8:27 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

HI again, Sorry for my slow reply I didnt see your post until now, I'll do some more investigating with the scope when i have some more time, but since i last posted i saw a genuine NOS spare D50 reverb chip for sale on ebay and got chatting to the seller an ex Roland technical engineer, he told me ...
by DigitalMetal
Mon Jul 31, 2017 1:55 am
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Mooger5 wrote:Did you run the Test Mode as described on page 12? If there´s a serious problem with the reverb and chorus ICs, it´s supposed to show.
Yes I did that very early on and it said ok, I haven't done it again since.
by DigitalMetal
Sun Jul 30, 2017 8:34 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Ok, The only thing that seem to have a direct affect are the digital volume control (in the patch programming not the volume slider on the front panel) and the EQ. I can turn the digital volume right down and the synth becomes totally silent so the noise source but be before this, I can also adjust ...
by DigitalMetal
Fri Jul 28, 2017 4:54 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

No problem, its all good as like you said it's ruling things out. It was already on V2.20 so not an upgrade but worth checking still. I'm pretty good at SMD soldering so wont need to drag solder the pins i can do them individually with a needle tipped iron and my eyes and check with a microscope whi...
by DigitalMetal
Fri Jul 28, 2017 3:37 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Ok I burned two brand new Eproms, One with Version 2.10 and another with 2.20 using either of them still exhibits the same noise :(
by DigitalMetal
Tue Jul 25, 2017 8:37 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Ah ok I get it, I'll have a got with a freezer spray on the weekend. Thanks for the infor about the EPROM, It did cross my mind that maybe someone had performed an upgrade seeing as it is on the latest version, It is soldered in rather than in a socket. Do you know where i can get a .BIN file or do ...
by DigitalMetal
Tue Jul 25, 2017 6:14 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

I've been doing a little bit of investigating and started my deconstructing some of the noisy presets, bear in mind these are the factory presets I downloaded from the Roland website and sent to my D50 via Midi dump. I loaded up one of the particularly noisy patches and muted each partial in turn to...
by DigitalMetal
Fri Jul 21, 2017 11:40 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Thanks very much, i'm going to have to go over it with a the microscope!
by DigitalMetal
Fri Jul 21, 2017 10:44 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Yeah that's kinda what i've been suspecting all along and even more so now that ive kinda run out of things after the DAC to replace.
by DigitalMetal
Fri Jul 21, 2017 9:22 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Audio/video Demo of the noise
by DigitalMetal
Thu Jul 20, 2017 8:55 pm
Forum: HELP!
Topic: D550 s/h buffer opamp replacement
Replies: 52
Views: 11111

Re: D550 s/h buffer opamp replacement

Thanks I havent had a chance to get it back on the bench again yet for more testing, but I did change the IC12 which didnt help (had to put a TL052 in for now as i couldnt get hold of a 5238 I was told this would be ok). I've found some reading material about voltage reference noise that i'll take a...