Is there any additional info I can provide to help someone lend their intuition about the pattern?
Here are some clues:[LIST][*]The visual artifacts occur on every fourth pixel column[*]They seem to always occur on the same columns between reboots[*]They occur over the boot image[*]The boot image seem to affect the appearance of the artifacts (what looks like the image's bounds become discernible — imperfect black background color in interplay with the fault?), i.e. what the picture is supposed to look like seems to have an effect on the artifacts[*]The artifacts differ between...
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Samsung UE32D6515WS — boot loop + what does this pixel pattern suggest?
I'm trying to determine the nature of these faults and whether they're coincidental or in fact connected.
Symptom 1: boot looping, showing logo and then going blank, backlight turning on for 2 s or 14 s intermittently, and arriving at logo again after approx 1 minute. Never appears to boot fully.
Symptom 2: vertical lines across whole screen while logo showing. Every 4th pixel column.
Backlight seems to work fine and is lit while logic board is disconnected. 12v, 5V seem stable and only dip when the system resets.
System still seems to reboot...
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Re: Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea
Thanks for your input. At this point it sounds as if it's not an idea worth pursuing. Too bad! Would've been a fun project if the chances were higher.
Regarding full panel numbers, I wasn't trying to avoid posting them, but since I don't know how to properly identify the numbers I was unable to determine whether I already had old photos of them or whether I had to open up the working set (undesirable) just to get at them.
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Re: Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea
Thanks for the suggestion. Now, there are three stickers on the chassis alone, of e.g. the RU (see attached images). How do I know which number refers to what? I never figured that out in my first repair, and I don't know the format of full panel numbers....
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Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea?
I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.
I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.
The models launched in 2018 and 2019 respectively....
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Re: Post your Samsung NU model series backlight failures and diffuser melt-downs here
Has anyone of you ever swapped out the logic board in a NU (or other Samsung) with a more feature-rich board from another model (with a broken panel)?
I'm kind of curious about doing that, using a board from a RU, but I don't know if it's likely to be able to drive the LCD. The tvs look pretty much identical except for the logic board of course (and slight differences in the PSU). Do you think there's a chance?
—
And to not stray from the topic: this...
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Re: Why did my MOSFET blow up?
Yes, exactly, I've triple checked. Drain and source are not shorted to the gate. It might have been, though — here is a photo. A piece is missing nearest the gate pin....
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Re: Why did my MOSFET blow up?
They did not, unless they subsequently failed open.
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Re: Why did my MOSFET blow up?
It shorted drain to source. Does that bear any relevance to what you're talking about?...
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Re: Why did my MOSFET blow up?
Pasting did not preserve the link target, sorry:
[url]https://www.manualslib.com/download/1250393/Harman-Kardon-Mas-101.html[/url]Re: Why did my MOSFET blow up?<br />...101.html[/url]
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Why did my MOSFET blow up?
I had a switching transistor and PWM IC blow up as part of a repair, where a big chunk of each went missing. Now I would like to understand the likely turn of events, and maybe determine if I did something stupid. If nothing else, I should at least extract some lessons from it.
"IC10" can be found on page 169 in the service manual:
[url]https://www.manualslib.com/download/...n-Mas-101.html[/url]
The entirety of the repair is basically:
1. Device doesn't power on (IC10 supply voltage unstable)
2. Replaced C18 and C66
3. Device...Last edited by ohren; 04-30-2023, 07:06 AM.
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Re: Suction Cup which to choose
Is that a quantity, or a size? It's hard to tell when you leave the unit out...buuut if the former then there's still the question of screen size, and if the latter then the unit is reasonably a double quotation mark '"' which technically is punctuation, which I notice you also don't seem to bother using.
So in short: for a 55" TV LCD panel [I][B]excluding all other parts of the actual screen[/B][/I] I have had good luck with two Biltema Vakuumlyftare (30 kg), item no. 15-887. About 90 kr each last time I checked....
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Re: Harman Kardon MAS101 Help me understand how this 5.6V_STB is created?
Thanks for your latest reply R_J. I had to put this on hold in favor of some TV and Xbox repairs.
Interesting developments! IC10 (FAN7602N) exploded... Flash of light, and nothing but a pile of ash. Or at least a big chunk of it is gone.
I simply replaced C18 (in the correct orientation) and I don't think I made a mistake, other than maybe if the flux I left on the board could create a short at the high voltages (~325 V) around that chip(?) I don't know. No charring on the bottom...
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Re: Original Xbox 1.0 PSU: Foxlink FTPS-0002 Rev. B. — 12 V low, 5 V high — transform
I must've remembered incorrectly
I think I read through that thread a while ago. Good compilation, thanks! Been careful around those heat sinks since then.
Come to think of it the negative lead, even discounting the cap's charge, is only at mains earth potential 50% of the time... I'm really not touching AC often enough. I foresee an explosion.
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Re: Original Xbox 1.0 PSU: Foxlink FTPS-0002 Rev. B. — 12 V low, 5 V high — transform
Couldn't have asked for a better answer. I was hoping you'd reply based on your replies in [url]https://www.badcaps.net/forum/showthread.php?t=95744[/url].
Turns out you're absolutely right, and I didn't need to find a lightbulb; I tried it again in the box again and it just worked. What am I even doing here... It was repeatedly shutting down when powering it up before. If I fixed it it might have been bad joints on the rectifier diodes who were sharing a heatsink,...Last edited by ohren; 03-19-2023, 06:46 PM.
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Original Xbox 1.0 PSU: Foxlink FTPS-0002 Rev. B. — 12 V low, 5 V high — transformer?
Hello!
I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.
Measured voltages with no load:
After rectifier diodes
12V: 6.17 V
5V: 5.67 V
Secondary transformer pins AC measurement (really don't know if this says anything)
12V: 2-2.5 V
5V: 1.04 V
I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,...
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Re: original xbox power supply
39 ohms 5%
If your supply is a foxlink ftps-0002 rev b at least. You didn't specify.
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Re: Pinout of LG 4 pole 3.5 mm component video cables?
No but I did now, and yes, that was correct. I didn't think of just trying green, thanks! Otherwise, the prospect of manually holding RCAs tips to sleeves and keeping track of it all wasn't very appealing
Thank you very much for taking the trouble! More than I could've asked for.
Now I won't have to second-guess whether the manual is in fact correct (it is NOT — the jack labels are correct), whether the two jacks are are 3, 4 or 5(?) poles, and which is Pb and...
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Re: Pinout of LG 4 pole 3.5 mm component video cables?
Thanks for taking the trouble! When you say Panasonic adapter, do you refer to an adapter for your Panasonic TV, or for your Panasonic <something else>?
Anyway, that's unfortunate, since GND is in the same place as the one I already tried.
It's two jacks; one for YPbPr video and one for stereo audio. I'm simply making the assumption of 4 pole + 3 pole. Haven't ever come across the kind of 3.5 mm plug you're describing — sounds like a monstrosity.
...
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Re: Pinout of LG 4 pole 3.5 mm component video cables?
Yes, that seems to be an example of a product whose pinout I'm wondering about. I should've mentioned I was asking about YPbPr.
Component video works fine whenever I use it. Must be a glitch in the matrix where I live.
Anyway there wouldn't be much point in asking for the pinout of composite video — it's one way or the other. With YPbPr there are 24 permutations assuming a common GND....Last edited by ohren; 02-25-2023, 01:02 PM.
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