the Internet seems to have the Schematics online, so i started to investigate and reverse-engineered i... t-Voltage at TP1. (Uin - Uce Voltage Drop at T2). So the Problem is somewhere around T1 who controls T... or with around 0.6-0.7V voltage drop Ubc and Ube. So in "unsoldered mode" it looks normal to me.
- W... nsistor was conducting no matter which direction. So the T1 is considered DEAD or BLOWN.
- I search