Samsung P58C8000 ~ Power Supplies have failed (2)

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Okay. I soldered the lesser of the two damaged boards.

Good news = It's working!

Bad news = Got the “pink banding issue”

Researched it both here and elsewhere last night.

Vs readings, as I adjusted them upward are:

At 210, the white screens are flooded with pink banding
At 215, pink bands still prevalent
At 220, it's watchable, with no overt banding, but not ideal (still has the pinkish hue throughout)
At 226, which is the max setting, apparently, it's fairly clean and clear, but still not “picture perfect”

I have a few questions at this juncture, but here are the most pressing:

1) Since I now have 3 Power Boards in my possession (2 from the tv's previous owners and the new one I just bought), will using the new one make this any better or is the problem now inherent in the panel itself as a result of time and usage?

2) Can I safely run the Vs at 226? From everything I read, it appears that is not wise as it is likely to accelerate the return of the pink banding problem. True or not true?

3) Read up on the LOGIC.bin [3D58] that one can put on a USB and implement. I found the link to it that takes me to mediafile.com
Is this worth uploading into the tv? Or, is it actually NECESSARY to do given the circumstances outlined above and the only way to recalibrate things and not run the set at a constant 226 on the Vs?

Eager to continue learning from all the great folks here.

~ kca

[R_J]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

What does the label on the panel recommend? some people have also lowered the Vs to fix the problem
Also what is the Va voltage.
Some info here:
https://www.badcaps.net/forum/showthread.php?t=44187
Panels do get bad over time, and sometimes you can make adjustments to compensate for it.

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Samsung may have a firmware update to the control logic board for this issue.it updates the algorithm of the control board for aging. After the update with the one I had I settled VS at 217. Perfect picture.

Dont touch the VA voltage! This is the drive voltage for the C buffer ICs. Adjusting this voltage will kill the panel. Very tempremental.

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Vs recommends 210 on the panel. Recommends 55 on the Va.

The Va has stayed steady between 54.8 and 56.0 throughout all of my purposeful Vs fluctuation trials.

I tried lowering the Vs. it just gets worse and worse the lower the go.

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Hey fa8 ~

Yes, I was reading a thread from 2014, I think, where you explained the exact same problem you were having on the exact same set (PN58C8000). Did you try that 3D58 LOGIC.bin file from Samsung? It seems like you did and that it helped quite a bit. If so, how long did it last and what were you able to tune the Vs down to after the upgrade?

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Here's the link. I believe the bin file you need is the 3D58.bin.

http://www.avsforum.com/forum/167-pl...topics/2713561

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Yes this is the bin file I installed it coherently cured the pink branding problem 95%. I did have to do a small voltage increase on VS but most symptoms were gone.

On a side note you must be on it I was just posting the 3D58.bin file as you are posting about it too lol.

This I should note does not firmware update the main board this goes directly to the control board through the main board USB.
I don't know the outcome long term as I sold it 2 years ago but under moderate usage between the year that I did it it seemed to hold up just fine. I never did drop VS it's stayed at 217

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Thanks. That’s very helpful!

If I could run mine at 215-217, I think I might skip the firmware update and just live with the slight, pink overall hue (sans banding). But, mine doesn’t really clear up until 222 and only really good at 226.

So, I think my trying the LOGIC.bin file is the way to go.

Did you have to buy or use the Samsung Factory Remote (Model AA81-00243A) in order to complete the USB-related firmware upgrade with the LOGIC.bin file, or is there another, simpler way? I don’t mind buying the Factory Remote. It’s only about $15 on eBay and I can probably use it for other fixes in the future.

I read most of the AVS Forum and I have a pretty good understanding of how to get through the upgrade process. Just don’t know if I MUST get that factory remote ordered today in order to get the job done.

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

No just used the standard user remote. As soon as I inserted the USB with the. bin file, With the TV already on it automatically found it and asked if I wanted to update

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Well, I just gave it a try and it isn't working.

Reformatted a USB to FAT32 ( ... 32 was the default, but I read that either FAT or FAT32 would work) so that the USB was completely empty and reformatted.

Downloaded the correct 3D58 file. It came through in the form of a Zip file, which was no surprise.

Created the PDP_LOGIC file on the USB

Renamed the downloaded zip file from [3D58]LOGIC.bin to simply LOGIC.bin

Put it into the PDP_LOGIC folder on the USB

Transferred the USB to the Samsung 58" TV set. Set was on.

Menu popped up just like you said it would, fa8, but when it asked for either Media Play or Software Upgrade I chose Software Upgrade and it did a search for the file, I suppose, on the USB for about 10 seconds before coming back with an error message of:

No file can be found


What am I doing wrong?


I tried to open up the Zip file, and try the whole thing again, but it would not open and I do not have an alternative program on my Mac to do so. Just used the Open With > and the the Default program. Not even sure if I have to open up the Zip file, but it did not work either way (unopened Zip file was my first attempt),

Here is the link I used to find the file when I brought it up on Mediafile.com where I performed the download directly from the site:

http://www.mediafire.com/file/bgmlsc...58%5DLOGIC.bin


Would it make any sense to use the Media Play option when the Menu comes up on the screen after I insert the USB? Didn't want to risk trying that before writing back here on the forum.

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Maybe because I was using my MacBook to more rapidly download the file (as opposed to an old and clunky HP I have at my disposal)?

I reformatted the USB using this older HP laptop into the FAT32 version only because the MacBook was being used at that moment an hour ago. I switched to the MacBook when it became free and did all the actual downloading of the file from the Internet (and then onto the USB) on the Mac. Would that make a difference. The into on the USB now does say FAT32 (MS-DOS). Maybe that's a conflict?

I could try it all, the whole operation over again, on the HP only. Or, is there some other glitch I should be focusing upon instead?

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

If I could backtrack for a one second, another element of all this is that every time I touch the DMM to the Vs I get different readings. I have done it about 3 dozen times or more, and yesterday I was getting some level of consistency on the "MAX" Vs setting of 226.

Now, and a couple of alternate times yesterday too, I am getting back a reading of only 220 when I have the Vs turned all the way to the right on this "MAX" setting.

So, what I am beginning to wonder is:

Although I would like for the LOGIC.bin file upgrade to work and for me to be able to bump the whole calibration down to 210 or 215 at the most in the aftermath, am I really that far out of spec when I am running it at 220 (or even 226)?

The recommended Vs is 210 on the sticker on the back panel. If I go to 220, that's only appx. a 4.5% gain. If indeed this MAX setting is really running at 226 (as I said up above, really hard to tell with the inconsistent readings on the Vs test pin), then 226 is appx. a 7.5% gain over the recommended 210.

How far can one really safely go above the 210 and not do more harm to the panel over time than it's already displaying? I am either going to keep this set for myself (as I really like the styling), or I am going to sell it in the next week or two and I don't want to deceive the buyer into thinking that there is no issue with the pink banding if it's going to reappear, and maybe do so in force, six months from now.

Is anything under a 5% gain over 210 acceptable? A 10% or less? Is there any standard for this type of scenario?


Note: The other thing that was odd with the DMM is that I could get the 55Va reading very consistently and very accurately when I had it on the 200 V range, but the Vs would not register at that setting. So, whenever I was getting my 220 to 226 readings mentioned above, it was only because I was forced to switch the DMM into the 600v range instead. Does that mean anything? Seemed odd to me.

[R_J]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

You need to go into the service menu to do this upgrade.
Make sure your meter battery is good.

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Right I found this information originally about 4 years ago on the AVS forums. And if I recall it does have to go into the service menu which is MUTE 1 8 2 POWER.

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Good call on the DMM battery. I will check it.

So, I can just use the MENU 1 8 2 to get into the Service Menu?

(what the PDF file on this calls the Factory Menu?)


5. Go to Factory Menu → Control → PDP Options → Logic USB D/L.

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Okay. Got it.

Mute 182 Power

I'll give it a go. So, I don't need to be concerned that the Zip file never really opened. It's still sitting in that format on the USB.

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Did you turn on hotel mode 1st?

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Well, just got into the Factory Menu successfully, but there was a roadblock there.

I searched through all the CONTROL menu options first, and there is no PDP Option.


4. Insert the USB Thumb Drive into the TV's USB port.
5. Go to Factory Menu → Control → PDP Options → Logic USB D/L.
6. Press the Right Arrow button on the remote to begin the Logic S/W upgrade. The following message appears:
Wait for the process to complete.
If the problem persists, adjust the Vs voltage to 213 V.


Then, I searched through every single menu option available on the Factory Menu, and never did anything come up that had to do with PDP Options.

What next?

I will add pictures in a minute or two.

[freakaftr8]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Do not look in PDP options look in SVC for USB D/L

[kca]

Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Was looking for something that said USB also, but it did not appear to be in any of the menus. The only thing I didn't try was clicking on the option that read:

Panel Display Time 11967hr

That is in the Service (SVC) Menu. But nothing is in any of the menus that reads PDP or USB. I must be missing something. This is a pretty standard option for any service tech to investigate and deal with, I have to imagine.