[sdiy] Siel OR400 Transformer needed

ASSI Stromeko at nexgo.de
Sat Jul 27 10:43:29 CEST 2013

On Friday 26 July 2013, 03:58:50, M Maeghan Skala wrote:
> Turned the OR400 on and a big spark :(

Speaking of which: it would seem from your description you've touched the 
heatsinks with mains.  The schematics you posted shows all IC mounted to the 
same heatsink, which means that at least some of them must be isolated from 
the heatsink (the tabs for the negative VR ICa1 and ICa3 is connected to the 
unregulated input voltage and the positive ones ICa2 and ICa4 would be 
connected to ground).  Can you check which ones are or aren't isolated?

Also, you mentioned that you have a spare PSU board.  Is this the one you 
gave the voltage readings for (connected to the original transformer of 
course)?  In that case there really wouldn't be a concern of damaged parts 
(at least not from mains) and we could go straight to checking which 
voltages are off and why.

+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

Waldorf MIDI Implementation & additional documentation:

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