Need help for NES DNA20 mod.

[Iruel]

I am posting this here because I know Joe is busy with the NES dna 30 and thus he have not replied to my queries.

When I first got the NES from a trade, it wouldn't read my main atty, a nimbus. It displayed check atomizer.
after communicating with joe, he assumes it's the old 510 center pin with the lousy insulator that was causing the problem thus he sent me a new one with delrin.

now, after i got my friend to install it on for me, it sometimes display check battery and still wouldn't work with my atty. only a low res hh357 works with it, even then, the performance is sub par.....

does ranyone have any advise? Joe prefers not to take it back as it's risky to send it back after that as vaping is banned in my country.

Is the centre pin suppose to be floating? I can't get it sit into the connect firmly and perhaps that's what causing the problem?

i hope someone can help me out as my main mod, a roller, just got its button stuck and I have nothing else to use now...

thanks in advance!!

 

[gray]

It's difficult to diagnose something like this without having it in front of me. Do you have access to a multimeter? It should be an easy check of continuity and resistance between the bottom of the positive 510 pin and numbus pos. coil contact to rule out any atomizer problems.

Outside of this, I'm going to take a wild guess and say it's the solder job to the 510 connector. The neg. contact in particular is difficult. The solder should look like it's digging into the metal a bit and not balled up on it. A bit of sanding, isopropyl swab, pre-heat and flux paste may be required to get a good bond. I strictly use Kester 44 solder for all of my rework now. I've used other similar spec'd solder in the past that's worked well too.

Check all of the high amperage points on the board for cold solder joints under a magnifying glass(battery and 510). You're looking for any stress cracks near the solder to pad. The solder joint should also be very shiny. The battery contact joints should be checked too. Check battery contact tension and clean them. Battery age?