[sdiy] Siel OR400 power supply busted

[MTG]

It might be worth a visual inspection of the undersides of the boards to 
see if a trace got torched...

GB

On 8/7/2013 7:05 AM, Steve Lenham wrote:
>
> The other LEDs are mostly located on, or driven by, the Logic PCB. In 
> particular, the Brass/Piano/Reed/ Strings LEDs are driven from simple 
> flip-flops (ICs 2 and 3), so the fact that they are not working well 
> indicates a fairly fundamental problem. That circuitry also uses the 
> +/-6V supplies, which we have established are not missing entirely, 
> otherwise none of the LEDs would be bright. Try checking that all four 
> power rails are present on ALL of the circuit boards - could there be 
> a missing ground or power connection between the separate PCBs?