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Repairing Gen 2 Zac Power Supply Board (No 170V)


robm

Question

Picked up a Stars Phoenix a few weeks ago, and due to their stupid design (combined with my stupidity), i plugged the lower plug that brings in all the transformer voltages one pin off. It appears to have only affected the high voltage section with no displays working - there is 2V at the 170V test point - all other test points appear OK.

 

See pic in next post, but i have replaced TR1,2 and 3 and am thinking i shoudl replace SCR1 next - i have a Zac Clown, and get 170VDC out of the top leg on it, whereas on the Stars, it is only 3V.

 

Am i on the right track, or are there any other components i should look at replacing as well?

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