Allen and Heath GS1, missing PSU. Replace w/ transformer?

[roy]

Hi all, I have an Allen and Heath GS1 with no PSU.

Looking at the attached schem of the power supply section of the GS1, I guess I could just connect something like
this 2 x15V transformer
http://www.banzaimusic.com/Talema-TRTV50215.html
directly to the 5 pin input.
It looks like all rectification etc. happens inside the mixer, right?

Thanks for any advice!
Roy

 

[Harpo]

Yepp (or the TRT50218).
From GS1-Service manual, pg.4, max.power requirement is 33VA, so a 50VA rated transformer is sufficient but will stress the 1A rated rectifying 1N4002 diodes D17...D20 a bit more at powering on. Maybe upgrade these with 3A rated 1N540x diodes. Center tapped secondary voltages are 33VAC from technical specifications pg.4 (or 36VAC from block diagram pg.21), but your 50VA dual 15VAC will do with a little less headroom above vreg.dropout for the +/-15VDC rails. The +48VDC is coming from a voltage tripler circuit.
For transformer mains side you want a fuse and a mains switch.

 

[roy]

Thanks so much Harpo!
That's a great help.

Greets
Roy