Author Topic: Echo dream 2  (Read 251 times)

Carlinb17

Echo dream 2
« on: September 15, 2021, 06:40:51 PM »
Hello, I was asked to trouble shoot a pedalÖ and now I need some guidance. Itís a echo dream 2 based on a dba pedal. I get no fuzz whatsoever from the pedal. It just brings up the volume. Delay works so I imagine that the 2399 chip is good. In looking into the pedal it seems wrought with issues on the few boards I could find. I didnít find any definitive schematic and this one doesnít use a charge pump. I suspect itís the xr2206 chip, some of the boards said it runs at 18v but whoever built this put in 16v electrolytic capacitors so I cannot try it with 18. With 12 it doesnít seem to change anything. I did t know if anyone had any experience or ideas.

Thanks




moid

Re: Echo dream 2
« Reply #1 on: September 16, 2021, 07:24:01 PM »
Not sure if it helps, but I have a schematic for that pedal... I don't recall where I got it from though. It's very hi res, so I hope it scales up when you click on it. I've never built this circuit so can't offer any advice on how to fix it.


Carlinb17

Re: Echo dream 2
« Reply #2 on: September 17, 2021, 06:36:24 AM »
thanks for the schematic, I will try to go though the pcb according to it and see.


rx5

Re: Echo dream 2
« Reply #3 on: September 18, 2021, 12:16:19 PM »
it could be that the op-amp is dead. on my (unfinished) build, in using TL072. check around the fuzz section. maybe there is short somewhere. or maybe a dead fuzz pot also.

BE d Bezt, Urz D Rezt... RoCk ON!!!