If the load power consumption is small, it is quite possible to use the existing ECAP.
"if it's a smal smps psu block, is it possible to change it for another one / other brand ..." This would be impractical due to space constraint and the fact that it's not just a PSU. There are other boards sat above this one that plug into the PSU board. It's not just a PSU board, that being said, the PSU occupies one half of the total board.
Thank you.
you can for tests but put a new / order a new one with the same value .... i've seen some forums with this brand, capacitors failures are reported a lot ?
you can for tests but put a new / order a new one with the same value .... i've seen some forums with this brand, capacitors failures are reported a lot ?
"if it's a smal smps psu block, is it possible to change it for another one / other brand ..." This would be impractical due to space constraint and the fact that it's not just a PSU. There are other boards sat above this one that plug into the PSU board. It's not just a PSU board, that being said, the PSU occupies one half of the total board.
Thank you.
Technically, you could simply desolder the transformer and optionally other parts like the input filtering and you can solder the DC output of a power supply directly to the output capacitors
You just need to figure out the output voltage - it will be lower than the rating of those two tall capacitors on the top right... I'd expect to be something like 20-25v.
All that's in the red is on high voltage side ... to the left of the yellow line it's just mains filtering, and a fuse by the power connector. You could desolder them to make room for a third party power supply. If you power the board with DC from separate power supply, you can unscrew and desolder the switcher IC, the transformer, and the diodes on the right side heatsink as well.
Example of power supplies that could possibly fit inside that space :
https://www.digikey.com/en/products/detail/fsp-technology-inc/FSP080-P24-A24/13240546 (24v 80w ) or https://www.digikey.com/en/products/detail/fsp-technology-inc/FSP080-P24-A12/13240474 (12v 80w) or 15v 85w https://www.digikey.com/en/products/detail/mean-well-usa-inc/RPS-120-15/7706020
and lots of laptop adapter style external power supplies are available as well (you could just replace the AC power connector with a barrel jack connector.
If it's not too late, you can order it from TME.EU for around 2.4 pounds plus vat : https://www.tme.eu/gb/details/top271eg/voltage-regulators-pwm-circuits/power-integrations/
Shipping's probably 4-6 pounds. It will ship from Poland warehouse.
Thanks mariush
No it's not too late as I haven't placed an order yet. Carriage would be £7.00 which is £5.00 less than Mouser. The problem is that TME don't have any of the capacitors I need in stock and they have a long lead time I've decided to also replace the 2 x DC Lelon output capacitors with Nichicon for reliability, they have a longer life at elevated temperature, the Lelons test ok but this speaker is a nightmare to teardown and I don't want to have to do it again in my remaining lifetime
I didn't know that this company existed but I shall certainly check their stocks when I need to order something in future the delivery price is much better if they have the component needed. I've created an account already.
You've been a great help, thank you once again
Thanks mariush
No it's not too late as I haven't placed an order yet. Carriage would be £7.00 which is £5.00 less than Mouser. The problem is that TME don't have any of the capacitors I need in stock and they have a long lead time I've decided to also replace the 2 x DC Lelon output capacitors with Nichicon for reliability, they have a longer life at elevated temperature, the Lelons test ok but this speaker is a nightmare to teardown and I don't want to have to do it again in my remaining lifetime
I didn't know that this company existed but I shall certainly check their stocks when I need to order something in future the delivery price is much better if they have the component needed. I've created an account already.
You can usually go up in voltage rating and even capacitance value, as long as the capacitors will fit inside the area (or they're not taller than the space available).
If you tell what capacitors you're looking for (and what size are your current capacitors), I'm willing to look up and recommend something for you.