I own a defective Owon DS7104 oscilloscope.
After turning it on, the logo appears on the screen and further it does not start. The symptom may suggest a dumped firmware but not in this case.
I couldn't find the schematic, so I'm setting up this post.
I made some voltage measurements of the inverters and one of them does not give any voltage ( it is the one with IC U99, choke L8).
Measuring the resistance on choke L8 to ground I have a full short circuit ( no wonder there is no voltage on it).
Before I do a short-circuit test and use a thermal camera, I would like to find the datasheet of the IC (U99, VUBI TI56 ( or T156) SO5F).
I can't find what kind of IC it is.
I don't count on finding a schematic of an oscilloscope, maybe someone has a schematic of some inverter in which such an IC works?
I know that I can look for the faulty component in many ways, but before I start, I would like to have a datasheet of this chip.