[Lavabox Dna 75 "too hot"]

I resolve this issue by removing the yellowish plastic that wrapping dna board. So far i haven't received too hot error. It has been two days.

Why is it expensive mods keep having issue, used evic vtc mini for two years without any problem. 

Thia is my second store bought dna that having problem. The one that i diy myself dont have any problem, except the look of it.

[DNA 75 - HCIGAR VT75 nano/Resistance problem]

Daddi89 said:

So ATM there are two possible way to fix this damn mod, the issue is caused by the not so proper connection between the atty gnd and the board ground (caused by a silly engineering by hcigar) overtime the 510 plate will oxidise and fucks up the gnd connection (crated by the 510 top plate, the black plate just down this one and mostly the entire body)

First way to fix her (and easiest to do) is by remove a thin layer of the 510 black plate (just under the removable 510 hybrid plate) with some sand paper (i used 180) then wrap with an aluminium foil the outer part of the battery box (not the board part) till the inside, including the 510 (so in this way youre going to create a new conductive layer between the two parts of the body and between the two 510 plates) and then remove the excess over the positive 510 pin (just the center ofc) and battery.

Second way (not so difficult but not so dumbproof like the first one) is to solder an electrical wire to the other ground connection on the board itself, peel the cable and leave it between the two 510 plates. plus if you want, add another one at the bottom of the board and leave it between the battery cap and the battery itself. (following this procedure you will have 4 wires in total soldered to the board instead of the original 2)

For now i did the aluminium foil trick, will update in the next days/hours and see if there are still any resistance fluctuation overtime.

Can u share picture of the modification that u have done. I didn't really get the idea of it. I meant for the first method Thanks..

[DNA 75 - HCIGAR VT75 nano/Resistance problem]

Kostant said:

Look at this link

http://www.esigarettaportal.it/forum/156-battery-box/61324-ufficiale-hcigar-vt75-nano-dna75/page53

post 525 and 526

This may be a definitive solution

I made the fix and it works

Bye

can some explain it in english, i can't understand from google translate. how is the washer is connected to the 510 plate? soldered or just a touch connection?

[DNA 75 - HCIGAR VT75 nano/Resistance problem]

I have managed to solve unstable resistance value on my vt75 nano without soldering. What i did was remove the pointy tip on top of positive 510 connector using a file. This can be done by disassemble the 510 connector. Once pointy tip was removed, i tighten the 510 plate(negative terminal) to C frame. Tested with escribe device monitor, the graph is even smooth compared to before the changes. So far the resistance value is stable.

[DNA 75 - HCIGAR VT75 nano/Resistance problem]

Any one got any idea how to permanently fix this. From my experience, all this problem is due to non-solder connection. This non-solder connection will formed oxidised layer over the time and cause unstable resistance. Hope someone creative can come up with good idea. Or may be a new C frame that is pre-installed with 510 plate.