So I have this friend who is in construction work. He uses a lot of power tools, especially blue BOSCH akku tools.
One day he mentions that he just bought new GAL1880CV charger. He also said that he has about five of the same chargers that are not working.
As things go, I now have 5 GAL1880CV to repair and I also borrowed that one good charger to use for part database as some of the components were unrecognizably burned.
After I examined all five units it seems they all share the same problem. Standby power supply part is burned in all of them.
In my humble opinion the main culprit behind the problem is transistor Q1, CS1N80 A1H in TO92 case.
As this original component is quite hard to obtain I found a replacement HFU1N80. This unit comes in I-PAK case and it fits the PCB with minimum adjustments.
Damaged components differed through all five units. Some had more burned components than others. But after all the repairs, these were the ones that needed replacement:
Primary side component list:
I also took few pictures of the new charger for future needs: