Roland Space Echo power supply Capacitor question

Started by snk, October 17, 2020, 05:39:00 AM

Previous topic - Next topic

snk

Hello,
I am recapping the power supply of a Roland RE501 Space Echo.
I have every capacitor required, except one : C2015, 33µF/16V. In fact, I do have one, but it is a cheap ChengX, and not a Nichicon or Panasonic (all the others replacements are either Nichicon or Panasonic) :(

So, my question would be the following : Should I :
1- use what i have in hand ( = the cheap ChengX), it doesn't matter much here.
2- wait and buy a 33µF/16V (Nichicon).
3- Use a 47µF Nichicon cap (I have read a couple times that beefing up some capacitors in a Space Echo power supply could be for the better, but i am not sure)?

This is a copy of the schematic, with the capacitor circled in yellow/green :


And a video about servicing a similar device :
https://www.youtube.com/watch?v=LD-Mi797BWo

bluebunny

I would say it doesn't matter a jot.  I would also happily substitute something with higher (but ballpark) capacitance and higher working voltage.
  • SUPPORTER
Ohm's Law - much like Coles Law, but with less cabbage...

snk

Quote from: bluebunny on October 17, 2020, 06:20:49 AM
I would say it doesn't matter a jot.  I would also happily substitute something with higher (but ballpark) capacitance and higher working voltage.
Thank you, Bluebunny.
I have plenty 47µF/25V capacitors, so I may use one of them instead.
(By the way, so far, the ChengX i used in DIY effect pedals did not disappoint me, but with a more high-end unit like the Space Echo, I would like to go the safe way).

anotherjim

I would fit the better ones too. If you want to goldplate it further, you can add ceramic caps on the power busses - they didn't have too much high frequency noises radiating everywhere when it was designed.

anotherjim

Forgot to add, do we have a link for the service manual? That "DC motor" looks all kinds of crazy complex -  I'm curious.


anotherjim

Thanks I have the SM now.
That thing even has spring reverb and BBD chorus!
Part of me is jealous of what you have there... and part of me is glad I'll probably never have to fix or service one!

I think the motor system is kinda like a modern disc drive spin motor, only they have a permag instead of a main coil.

snk

Yes, it's a very comprehensive tape delay, along with BBD chorus and spring reverb.
I do really like the Roland gear from late 70s/early 80s.
It's their last tape delay, so they have put all their knowledge in it before going the BBD route.

snk

... I think it wasn't a bad idea to change the capacitors... :o
This one had a leaky green leg.


I have changed them all, except C204 & C205 (470µF), because I have only JRB capacitors, and ordered some Panasonic but haven't received them yet. I'm getting slightly impatient : would you advise me to wait and use the Panasonic, or do you have good experience with the JB/JRB?