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БП компьютера на TL494 , LM339

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Помогите разобраться, БП компьютера  на TL494 , LM339 дежурка есть и больше нечего, на 12 ноге ШИМ 13в. на 13-15 ноге 4,9в. на 8 и 11ноге 6,9-12,9в., транзисторы раскачки в норме, ключевые тоже.


SHIDO ATX-250(TL494, LM339).png

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На выходе кроме дежурки больше нечего не выходит,  ШИМ в порядке, ключи тоже, транзисторы раскачьки внорме

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