I installed a new board last night with a new mosfet etc.

3D Printing
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1

I installed a new board last night with a new mosfet etc. The lcd flickers still. So should I make a 12-5v regulator and wire it up? my psu doesn’t have a 5v rail

2

I may have the same problem. I have the reprapdiscount full graphic controller, looks fine under usb power, but trips out when I turn on the 12v. Is there a regulator on the Lcd we may have blown ?

3

I have same lcd and its pizzibg me off lol. I changed the regulator but I forgot to see if the diodes were bad. Anyhow I thought maybe just getting a 5v supply and have 2 plugs.

4

Any luck sorting out that lcd panel? Werner Berry, (Berrybot) mentioned a problem with the voltage regulator in one of his videos along with a good replacement part. Can’t find it right now.

5

Not yet.

6

Ok here’s what I’ve figured. If you don’t have enough juice (I have no idea why because ramps supplies voltage to the arduino) you can get a separate supply (say 5v) and run it into the barrel and bypass the regulator on the arduino with a jumper going to +5v. I wouldn’t want to exceed anything higher doing it this way. But a 5v wall wart and like 1000ma be enough to power the arduino and other low current stuff. I did this with a fried voltage regulator on the arduino. If anyone else has run into this please comment. I have searched forever on the net and get mixed results.

7

if your LCD is running from the ramps with the adapter then you shouldnt need a 5v supply to it…I no longer use a ATX supply as i find them to be to unstable and a pain to rewire…i use a 12v33amp dedicated PSU that is super stable and adjustable up and down by 10%…im currently supplying 12.25vdc stable to the ramps, accessories, and bed… my LCD no longer flickers or blacks out during prints…at first i thought the ramps was bad, but after some vdc supply checks everything was normal but that the ATX PSU was varing based on demand needed…the biggest issue i noticed was when i used my oscilloscope as a live vdc checker my PSU would nose dive into the 10 volt range as demand for more power was increased…eg. unloaded running 12.65vdc, w/ nozzle on 12.30vdc, w/ bed on 11.75vdc, w/ all fans on(4 -12v.9w) i got 10.92vdc, then the PS would make a high pitch noise and shutdown… now that i use a dedicated supply thats super stable, i can run everything and still have upwards of 12 amps to play with and voltage never drops below 12.15vdc… test your PSU under no load and increase it bit by bit with a good multimeter or oscilloscope to monitor it, you may find that the needed voltage isnt there…

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I changed out the Arduino Mega, and everything is working properly . There was actually a pin hole size burn on the regulator.

9

Oh ok right on… simple enough…

10

I got another board but too lazy install. I have 12.5v coming from the psu