Hi Dr Pepper,
Not sure about the fuse, but from your info I'd say it was 2000ma yes.
The chokes, what makes you think these have failed?, chokes are electrically very hardy and only really fail if you cook them or subjet them to a high enough surge to melt the wire.
In your situation if I had one that was open circuit I'd meaure the wire dia, get a new roll and rewind them, theres only a couple of dozen turns.
One thing to bear in mind if they have been super hot the core material could change its properties, if they had been that hot though they'd have burned a hole in the board.
I was thinking the same but I have some boards where I don´t get the 400V needed from the PFC circuit. The controller of the PFC is a L4981AD and also I have 5 LM358, HCF40106 and an AD633, of course resistors, capacitors, transistors, diodes... All is SMD so I didn´t make the schematic as it´s also multilayer board.
I was testing the chokes, where I have the 400V working all the coils showed me 216uH (220uH is written on the label). On the boards where I had problems on the PFC I got 196uH (two of them) and 209uH. I was working on the SMD area, replacing the IC´s because it was difficult to test measuring, my test was always measuring at pin 20 from L4981AD where I should get the gate driver. I didn´t get it. On pin 19 I get the power 15-16V.
I connected power with my power supply at this PFC circuit (without Vac input) and then I saw there were problems looking at consumption. A good one was always 50mA and then I got at damaged ones: 90mA, 400mA, 200mA. OK, then I decided to replace IC´s and do measuring test in diode testing comparing a good one with bad ones for the rest of components, all good.
After changing all components in one of them I got 520Vdc!!! Something wrong again, and then I was thinking about the inductance from the choke, may be it´s calculated for some exact value and if it changes (lower value) then you get more voltage at PFC. In fact, one of them with 209uH at its choke had an alarm Overvoltage (customer information when the unit is installed at the machine).
I think about all of this but I´m not 100% sure. I can do a test also putting a "bad" choke at a board with a good PFC circuit but I was doing already changes and then I had other problems so it´s a little bit complicated.
Always the same problem, no schematics, no information, no support so that makes things more difficult...