Huanyang VFD to Controller

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey Hans,

welcome to the forum!

@Hansvk

I had a good signal on the 485+ pin, none on the 485- pin (checked with oscilloscope).Turns out the DB25 connector had some poor solder joints on the board, I applied some new flux and solder after which the signal was fine. (I think this is why some people are saying you need to screw the connector down tightly… this may push loose pins back against the pcb).

I assume you mean the board of the breakout board adapter (not the Onefinity Controller Mainboard).

This is very interesting and precious information for the many that report failures with this. Thank you for reporting this!

I already thought that many of the issues that appear because of the problems that Ghislain reported here would not have appeared if people didn’t use these cheap breakout board adapters but wired a good cable to a branded DB-25 plug directly.