Gelhard GXV1000S - repair / Reparatur

I am looking for owner(s) of Gelhard GXV1000S subwoofer plate amplifier who could help me with some information and / or a photograph.

The switch-mode power supply (SMPS) in my GXV1000S is not working, there are also a few missing / replaced components due to previos repair attempts. Markings on the SMPS printed circuit board (PCB) are:

0300090151
POWER-F2
0802
E330731

I would appreciate if someone could make a high-resolution photo of the bottom (solder) side of the SMPS printed circuit board so that the SMD component markings could be recognized. I am especially interested in the types / values of the following SMD components:

SMD diodes D1, D2, D9, D14 and DS2 (all of them are missing or have been replaced by inappropriate components)
SMD resistor R54 (missing)
SMD integrated circuit U1 (supposedly the IRS2078S, a very misterious and extremely rare IC from International Rectifier)

I have already contacted the Infineon support in Munich (Infineon owns the International Rectifier) about the IRS2078S, but unfortunately could not help. The datasheet for this misterious IC is not available. I also tried Google search with no useful results ...

Thank you!

Greetings from Ljubljana,

Anton

P.S.
I published this theme in the "English" section due to my poor German writing skills. However, I understand German rather well, so any information in German is very welcome.