skylogger wrote: ... was not making contact to the pads. You can see it on the attached photo, between IC501 and D501.
The resistor connects to pin 3 of IC501. It is a 39K resistor.
Well spotted. IC501 seems to be some sort of non-active thing; it doesn't seem to have power supply pins. Unless they're pins 7 and 8, but it doesn't look like it. But they connect to PC312 and PC313, which despite their designations (PC sounds like Photo Coupler to me) are isolation amplifiers. They seem to head off to the output filter section. So I'd guess that they are measuring charger output voltage and current. 39 kΩ is a fairly high value, so it's likely to be in an analog circuit, consistent with the isolation amplifiers.
First time I've tried to do SMD work in a while, I don't have a SMD Rework setup, so my soldering iron was a bit like cracking a walnut with a sledge hammer.
It's usually not too bad with thin solder and a small soldering iron tip. I'm guessing you had a bad resistor, that barely soldered during manufacturing, and came loose with vibration and/or heat in service. You could try soldering it in backwards. The part will cost about one cent to replace, but of course you need to find one, and you might have to buy 100 or more. It's likely an 0603 (1608 metric?) size. You could get 50 of them delivered for AU$0.15 here:https://au.rs-online.com/web/p/surface- ... s/2132480/
They will obviously lose a lot of money on just that, (they are the last Australian supplier with free shipping), so it would be nice to order something else at the same time, perhaps some solder wick, or thin lead-free solder, etc.
I'll wait till I get some feedback from you and Coulomb before I try firing it up, so as not to damage anything.
Well, I think it's worth a try, considering that this might be the only problem. I forget now... were your pre-charge resistors burned? If not, I'd say try it out in the car. If those pre-charge resistors were burned, I'd say wait till we can figure out a more gentle test.
Edit: of course, you had the parts on the daughter board blown up. And we now know that these are associated with the charger output. Let's see what Kiev has to say.