Hi, sorry for digging up old topic and writing in English, but I'm hoping for help. ADP-200ER AA. It was dead but came to life after replacing IC151 (DNP012A). Now it's giving me 13.7V instead 12V. I replaced IC53, IC132, Q41 with no effect. IC53 (optoisolator) is new, the rest I took from donor board. I compared readings and all were the same. But I replaced them anywany.
I have no idea where to look further.