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PD035VX2 Screen with KYV-N2 V7 12V- 5V

Posted: Tue Apr 16, 2019 12:43 am
by Rowi
Hi I bought the PD035VX2 from aliexpress.
I do not find a manual for the board in the forum how to mod it to 5V (the recommendation told me it is 5V grrrr).

Is there an idiot proof manual how to mod every board - seems pretty specific for me what I found so far.
Is there anonther Controller with 5V working with this screen?
UTB8uee4K8ahduJk43Jaq6zM8FXaB.jpg
UTB8uee4K8ahduJk43Jaq6zM8FXaB.jpg (2.13 MiB) Viewed 1034 times
UTB8A6JNLpfFXKJk43Otq6xIPFXab.jpg
UTB8A6JNLpfFXKJk43Otq6xIPFXab.jpg (1.38 MiB) Viewed 1034 times
Thank you so much :) after 3 months of waiting - a missing controller - now all is here and the 12 V is killing me :)

https://www.aliexpress.com/snapshot/0.h ... 2845064699

Re: PD035VX2 Screen with KYV-N2 V7 12V- 5V

Posted: Sun Apr 21, 2019 6:33 am
by Rowi
Nobody?
Sceen turns not on with 5V :(

Re: PD035VX2 Screen with KYV-N2 V7 12V- 5V

Posted: Sun Apr 21, 2019 7:24 am
by McGyver
Try yourself a way forward: power with 12V.
Than measure on all big capacitors the voltage to ground.
You should find at least one. This can later on be the point to inject your 5V supply to. But in worst case your board has another cirquit which produces 3.3V from 12V source. In that case it starts to be difficult. It could work with injecting 5V in your capacitor from the beginning AND inject 5V to the 12V mains in, hoping this will run the 3.3V cirquit. All this needs some trails.

Edit: I just looked a bit your board pictures: ther is a linear 3.3 regulator and another 1.2V maybe. And there are maxbe three other boost converter circuits.

General question: why you rely on VGA video? According to my understanding this board does not run with HDMI or are I am wrong?

Re: PD035VX2 Screen with KYV-N2 V7 12V- 5V

Posted: Sun Apr 21, 2019 9:09 am
by Rowi
IT does Not have HDMI yes.....still think Aliexpress Messed IT Up because the v1 Version of the Board has 5v