Comments on: Repairing a Soundcraft Spirit E6 Mixer Switching Power Supply

By: Miguel González

Miguel González — Fri, 18 Jun 2021 18:02:41 +0000

Saludos cordiales desde Carora Lara Venezuela.

Hello man.

Please send me your manual soundcraft EPM 8 or 12, mixer PDF.

The Power supply original no working.

Agradecido de antemano por su atención.

Ing. Miguel González

By: Damien

Damien — Wed, 16 Jun 2021 10:00:42 +0000

Hello, i want to give you a big thanks ! your investigation helps me a lot to understand and to repair a soundcraft mixer now… in 2021 !

Now i want to know the value of the R40 resistor which is burnt, just above the three op amps in the main board.

Anybody does have a schematic or a open mixer ?

thanks in advance

By: Ruud van Steenis

Ruud van Steenis — Sun, 06 Dec 2020 10:43:05 +0000

Hello,
I also had a Soundcraft mixer with a bad power supply.
In my case the 100 V. zener and a diode for the 48 V had failed.
Just like your power supply, the center of the PCB looked like it had often been heated to a high temperature, but all components still looked ‘like new’, anyway not overheated!
What could cause this coloration of the PCB? (No high power parts there!)

Your schematic has been a great help in repairing this power supply, thanks!

Best regards,

Ruud van Steenis.

By: Dave James

Dave James — Tue, 23 Jun 2020 01:42:14 +0000

Oh, and this…

https://www.reelaudio.co.uk/Soundcraft_S_S2006APSU.shtml

By: Dave James

Dave James — Tue, 23 Jun 2020 01:35:55 +0000

Very interesting blog… I was shocked to see a request from Soundcraft for £130 for a service manual… here is access to a free one…

https://elektrotanya.com/soundcraft_efx12_efx8_mixer.pdf/download.html

I have owned several Soundcraft mixers over the years and currently have a couple of Compact 4′s that run 12v external PSU… after reading the horror stories here of the bad design of these Soundcraft PSU’s… I won’t be buying any more Souncraft Chinese made products! Looks like Soundcraft had their hey day and are now just trading on past glory and good name; shame

By: Spiro

Spiro — Fri, 02 Nov 2018 05:08:58 +0000

I have a badly burned up resistor on the power supply board of my spirit M4. Ii is impossible to have a reading in order to replace it. It is R45. Would anyone have a same mixer and could tell me the value or a schematic of the board?

By: Mike

Mike — Fri, 19 Oct 2018 11:16:39 +0000

Fixed one of these today.
Fairly routine stuff. Diode short cct, available from RS. Replace the electrolytics to ensure a bit of future reliability.
Only thing I would add is, if the pcb is carbonized, be sure to scrape out the carbon and make the pcb good before replacing the damaged components. Also replace R15 with a 10r 2w and form the leads so the resistor is off the pcb. It clearly runs hot and is probably the root cause of problems with these power supplies.

By: Walker

Walker — Mon, 16 Oct 2017 15:09:02 +0000

Just wanted to drop a thank you for leaving this on the web. Running through your diagnostic procedure helped me fix a broken Soundcraft M12. Not exactly the same PS since one side of the board is USB. But it’s amazing how close the PS side is. Also, the detailed helped a lot since I am not experienced enough to do a trace of the voltages. That provides quite an education! I have a second board with a dead PS that I’ll be looking at and hopefully fixing this week. Full Compass lists my supply on it’s website for $129 and 7-14 days to ship. I waited for 3 months before I finally cancelled that order.

By: Przemyslaw Wegrzyn

Przemyslaw Wegrzyn — Thu, 05 Jan 2017 14:27:15 +0000

For those looking for the schematic diagram: http://codepainters.com/soundcraft_psu.pdf

I have re-drawn it myself, both schematic and PCB. I was repairing a badly broken one, had to manufacture a new PCB.

By: Loic

Loic — Thu, 05 Jan 2017 13:32:49 +0000

hi everybody,
someone can give me the value of the D3 diode ( mine is burned…), C15 value?
and if someone have the reference number or somewere i can buy the yellow transformator with 4 in primary and 6 in secondary…
thousand thanks !!
Loic/ sls-lehavre@hotmail.fr