PCW voltages on STK7308

[squelch41]

Hi,
I managed to short out my PCW analogue board (Deeply annoyed with myself!)

I think I blew the STK7308. I'm using a pcw 9256. The data sheets are really unhelpful and I was trying to work out the voltages you'd expect on the stk's pins

With the STK in circuit, the board blows the overprotection diodesd d505 d511 and d512.
R501 gets very hot then burns out.

Removing the STK means none of this happens.

The transformer windings dont seem to be shorted (there is 'OL' reading if compare primary to secondary pins).

I just wanted to check before I solder in a new STK7308 to minimise the risk of killing it if Ive missed something!

Thanks

[jevicac]

Consult this manual, I hope it helps you.

https://www.habisoft.com/pcwwiki/lib/exe/fetch.php?media=manuales:servicio:manual_servicio_tecnico_pcw_9256.pdf

[squelch41]

Consult this manual, I hope it helps you.

https://www.habisoft.com/pcwwiki/lib/exe/fetch.php?media=manuales:servicio:manual_servicio_tecnico_pcw_9256.pdf

yes, been using that but it doesn't show voltages at the primary or secondary windings of the transformer or the expected voltages an the STK chip