The smoothing capacitor(s) after full-wave rectification of the AC mains is/are typically from 500 to 1000uF and 400 to 500v. I think that the ones mounted on your PCB are 680uF 400v, and this is a very common value. I am sure they are correct for your unit. If they had been replaced, you would probably be able to see that the solder was disturbed. Note that the correct voltage across these two capacitors should be about 325v DC.- what capacitors are fitted by manufacturer (see picture, upper area)
- what are the missing parts ( bottom area of the picture)
I think it would be helpful if you tell us what is the defect on your unit.Regarding the faulty of my unit, if I can't find the schematics, maybe someone can tell me what deffect has encountered and the solution for remedy.
The components I am looking at are the 2 grey disc like things just to the left of the marked capacitors