Re: TX98 Blown up power supply
I haven't changed any other parts in it yet however I took some voltage measurements on the primary side and they're not correct at all.
I've 39v feeding the SCR which should be 125v and at the supply pin 9 of the TDA I've got 9v instead of 14.1v, I know (from the doc posted by David - Thanks a mill for that) that the TDA wont be in its 'on' state unless this pin reaches a minimum of 12.3v so aside from whatever short is happening on the secondary side (which I still have to hunt down) I've still got problems on the primary I need to address
I haven't replaced C87 yet cause i need to look through my parts bin for one but capacity wise it measures ok but the ESR on it is way up at 2.3ohms
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Cheers,
Luke
Last edited by IKC2E51R8; 1st Dec 2022 at 6:47 pm.
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