Great! Thanks once again Momaka, for your help. Really appreciated. 😊👍

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Momaka asked to see the amp configuration. Here it is. Similar, but not identical to the B112D. The datasheet for the 8950 seems fairly flexible on its rail requirements, so 24V (around 10A) I'm thinking might be viable? The amp will primarily be used to power my grandson's keyboard, so I can forfeit some output loss....

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Thanks momaka, for your very comprehensive and helpful reply. Here are the before and after pics! (in response to Capleaker also).I'd really like to attempt a repair along the lines of what you have suggested, but you may change your mind about the viability when you see the extent of the damage![ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3640896}[/ATTACH]...

Hi Guys,
I need to replace the dual rail power supply in this unit (board damaged irreparably - by me!).
I have the schematic (attached) - but it does not (unhelpfully) show the value of the Pos and Neg rails.
Someone has suggested possibly + and - 42V, but as the smoothing caps are only rated at 50V this could be a bit close to the mark.
I am hoping Alxxxxpress might be able to come to the rescue and I am thinking somewhere in the 32V 8A region? Any suggestions/observations would be welcomed.
Many thanks.



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Re: peavey xr1212

The same main board is used in the XR8600D (not XR8600) as far as I can tell.

Re: peavey xr1212

Hi Guys,
Apologies for picking up on this fairly old thread.
I have several Peavey XR1212's in my possession, and have built up a reasonable degree of expertise in diagnosing, localising and repairing the main power boards.
Being SMD they are not easy to work on, and require a fair bit of dexterity with a soldering iron/heat gun! Not sure whaat solder was originall used, but it has a VERY high melting point!
Interestingly, I have had issues identical to those described here, with regard to Q3 and Q4 giving up in spectacular fashion....