Products > Test Equipment

Rigol Image Burn (DP832A Triple Power Supply)

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Fungus:

--- Quote from: tooki on June 08, 2023, 09:01:36 am ---
--- Quote from: Fungus on June 08, 2023, 02:35:00 am ---Looks like they used an OLED screen

--- End quote ---
LOL no.

--- End quote ---

So what's your helpful explanation/fix?

Fungus:

--- Quote from: DA-N-NY on June 08, 2023, 02:48:50 pm ---The shadow burn is the screen from the last user that used "Normal" mode for display.  It's now burned in regardless of what is displayed.

--- End quote ---

Yep, that much is obvious.

If it's an LCD then it might fix itself with time. The usual trick is to "exercise" the pixels by alternating between full white/full black for a while but that's going to be difficult to do on a power supply.

The other option is to take it apart and look for a part number on the back of the screen. Google that number.


--- Quote from: RoGeorge on June 08, 2023, 07:47:57 am ---That's a defective LCD, maybe a bad contact somewhere, the image shouldn't look like an interlaced TV raster.

--- End quote ---

Yep. If it's "interlaced" then there's probably a bad cable or bad contact somewhere. Take the lid off and press/wiggle things.

bdunham7:

--- Quote from: Fungus on June 08, 2023, 02:35:00 am ---Looks like they used an OLED screen in which case there's not much you can do except replace it.

--- End quote ---

Burned in OLED or AMOLED screens (like my old Samsung Galaxy AMOLED phone) will be inverse images since the most-used OLED elements become dimmer.  What is shown is some sort of LCD persistence, along with a pretty bad looking screen.  Ordinarily I'd expect that to go away if you turned the unit off overnight.  If it persists long term, my guess would be that Rigol used a particularly crappy LCD panel, which would be really annoying since it is pretty obvious how it is going to be used. 

DA-N-NY:
While the pictures I took could not capture all the issues, I am observing three as follows

1) The burned in (Ghosting of) the "Normal" interface page.

2) Very washed out display.

3) Screen flicker which is hard to capture on camera.

Think I will just return it to Amazon at this point.

tooki:

--- Quote from: Fungus on June 08, 2023, 03:56:23 pm ---
--- Quote from: tooki on June 08, 2023, 09:01:36 am ---
--- Quote from: Fungus on June 08, 2023, 02:35:00 am ---Looks like they used an OLED screen

--- End quote ---
LOL no.

--- End quote ---

So what's your helpful explanation/fix?

--- End quote ---
I don’t have one.

But unlike you I didn’t add misinformation, which is worse than adding nothing at all.

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