Gearslutz.com - View Single Post - Help: Roland SDE 3000 delay runs 20 minutes then dies

kb_cheapmods · 2nd December 2009

On Sunday I picked up a dead SDE-330 from CL for $5. Had the classic 'powers up but no function, only slight backlight'.

I opened it up to find a lot of crud surrounding the power supply caps on the top of the board - I thought it might have been glue to hold them in place, but I'd read other forums where the power supply on the Sxx-330 had issues. The regulator looked OK as did all the solder joints.

So, I replaced all the caps in the power supply with same or next-higher-standard-value uF values and same-or-next-higher-voltage ratings (mostly because that's what I had on hand).

Hooked it back up to mains and it booted perfectly. I had it running the night before last for about 1hr playing with it (my first rack delay, so a lot of newbie fun!) and it seems fine.

So I recommend recapping the power supply. It's just a good idea for any electronic equipment approaching the drinking age!

2nd December 2009	#8
kb_cheapmods Gear interested Joined: Dec 2009 Posts: 7	Recap the power supply. On Sunday I picked up a dead SDE-330 from CL for $5. Had the classic 'powers up but no function, only slight backlight'. I opened it up to find a lot of crud surrounding the power supply caps on the top of the board - I thought it might have been glue to hold them in place, but I'd read other forums where the power supply on the Sxx-330 had issues. The regulator looked OK as did all the solder joints. So, I replaced all the caps in the power supply with same or next-higher-standard-value uF values and same-or-next-higher-voltage ratings (mostly because that's what I had on hand). Hooked it back up to mains and it booted perfectly. I had it running the night before last for about 1hr playing with it (my first rack delay, so a lot of newbie fun!) and it seems fine. So I recommend recapping the power supply. It's just a good idea for any electronic equipment approaching the drinking age!