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Old 2nd Dec 2022, 2:09 am   #20
IKC2E51R8
Hexode
 
Join Date: Aug 2018
Location: Dublin, Republic of Ireland.
Posts: 492
Default Re: TX98 Blown up power supply

Replaced C88,C87, R84 R85 and R83 and same results, I've no 270k resistors to replace R91.

Voltages are a little different after changing those parts but still incorrect, I've have 44v going to the SCR now and 10v going to pin 9 of the TDA so not much of a difference and still not enough for the primary to be running properly.

Anyone any ideas of what else could be wrong?

R91 tests the correct value out of circuit so it may be ok any other suggestions as to why the voltages are off? I've 325v on the mains smoother C86 which is about correct (marked 315v on the board)
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