Re: EMPREX - LM-2601 - Sw26B - ILPI-082
Regarding CCFL spares....
I have a few other non-working monitors with CCFL's (I assume, due to similar PSU's)
Can I butcher one of these and use the CCFL's as test spares?
Is there any compatibility issues or exact operating voltage that must be observed...or will any CCFL work as a test spare for any PSU that powers a CCFL?
Thanks in Advance
jasenpeters
Member
Last Activity: 03-04-2022, 05:59 AM
Joined: 09-27-2015
Location: Austin, Texas
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Re: EMPREX - LM-2601 - Sw26B - ILPI-082
Okay, a lot of reading, and more to do.....
But after reading the success of this post:
[url]https://www.badcaps.net/forum/showthread.php?t=40757[/url]
I'm considering the following parts:
N3, 3KV, SEC (3pF @ 3kV)
[url]https://www.mouser.com/c/passive-components/capacitors/ceramic-capacitors/?capacitance=3%20pF&voltage%20rating%20dc=6%20kVDC[/url]
Among the ones available (first 2 entries), the only difference I see is the dielectric material (blank vs SL).
Does it...Leave a comment:
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Re: EMPREX - LM-2601 - Sw26B - ILPI-082
Done - "Replace all four high voltage capacitors with at least 10pF 3kV. (10J 3kV)"
Remember: I had already replaced 2 of the 4 output caps (12J @ 3kV) with 27J @3kV, before the first post.
1 of the 2 original caps had burst and the other was darkened but not burst. These were replaced first.
The result was a visibly dim image that vanished after about a few seconds.
I have now replaced the other 2 remaining matching pair of output caps (N3 @ 3kV, both with no visible discoloration or damage)...Leave a comment:
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EMPREX - LM-2601 - Sw26B - ILPI-082
Emprex - 26" LCD Monitor - Mfr. Date: May 2008
History:
- Recently purchased from a thrift shop, and went dark after about 2 weeks.
Symptoms:
- Blank black screen, smell of burned component, computers still detect monitor (as Sw26B).
Inspection:
- Took the monitor apart to find a control board and a power board.
- The power board (ILPI-082), near a pair of output leads to the monitor screen, had a visibly burned and ruptured ceramic capacitor, with the following markings:
12J
3KV
JNC
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Re: samsung un46d6000 no picture
I tested both Right and Left LED strips.
One of the LED panels is bad, as predicted.
Of, 36 LED, most were shorted, according to the Fluke continuity test.
The other panel, the good one, all LED's were tested.
From measurements of voltage and brightness of a single LED Light,
it seems that 2-2.5 volts can have a single LED light pretty bright.
That would be about 70-90 VDC or more to light 36 pairs in series.
For a strip, there is 2 parallel lines of 36 LED's in series.
...Leave a comment:
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Re: samsung un46d6000 no picture
Roger that...
Ok, I'll take the rest of the body apart and get to the LED strip(s)...
And work from there...
I suspect that if they are in series, one or more LED's are bad.
I doubt the actual connector to the Power Board or the wiring from the
Power Board to the LED strip, but I'll check.
Sounds good?Leave a comment:
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Re: samsung un46d6000 no picture
-- Voltages at Power Board Connector: CNL802 to LED Lights
[CODE]Pin Label Voltage (DC) to GND
--- ------ -------------------
Pwr On
1st Peak 2nd Peak 3rd Peak
-------- -------- --------
7 TOP 2- 0.70 0.05
5 TOP 2+ ~210 ~21 ~1.5
3 TOP 1- ~210 ~21 ~1.5
1 TOP 1+ ~300 ~255
[/CODE]
After the final peak, the voltages repeat.
All voltages are Positive with respect to GND
~ means approximately...Leave a comment:
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Re: samsung un46d6000 no picture
"What is the power supply board P/N? BN44-00423A?"
Yes, so I assume, the Power Board has a red dot next to:
PD46A1_BSM (BN44-00423A)
See Pic below:
[ATTACH]187317[/ATTACH]
I'll have test results soon...Re: samsung un46d6000 no picture
"What is the power supply board P/N? BN44-00423A?"
Yes, so I assume, the Power Board has a red dot next to:
PD46A1_BSM (BN44-00423A)
See Pic below:
[ATTACH]187317[/ATTACH]
...Leave a comment:
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Re: samsung un46d6000 no picture
Thanks budm,
I'll keep that in my Samsung folder.
The model number in that Manual is exactly as mine: UN46D6000SFXZA
As per the Fast Track Troubleshooting Manual...
I saw an online video that suggested the "Forced Backlight-On Mode":
[url]https://www.youtube.com/watch?v=AvH1ph77Sog[/url]
I disconnected on the Power board side, CNM-803, with no results of lights coming on.
So I tested the pin out of the light connector CNL-802, with no power to the Main board...Leave a comment:
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Samsung UN46D6000 - No Picture
Same symptoms as the title:
Plugged In - Red Light Blinking on front right side
5 sets of 2 quick blinks, then 1 Long blink
Picture Black, No Sound, no response to Remote Control
No apparent signs of power other than the blinking Red Light
Pix here, Please advise if they are labelled wrong:
[ATTACH]187271[/ATTACH] - All Boards (T-Con Covered)
[ATTACH]187272[/ATTACH] - Main CPU/Receiver Board
[ATTACH]187273[/ATTACH] - T-Con Board
[ATTACH]187274[/ATTACH]...Leave a comment:
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Re: Vizio - XVT472SV
budm, et al....
Just want to let you know that as of Dec-2018 (over 3 years) the Vizio is still "kickin'"
No problems since the "fix" back in Sept 2015.
I just read the thread again, and find it amazing that from a simple jumping of a resistor as in performed in the thread,
the TV has behaved normally since.
Since then (2017) I acquired another TV, LG in this case, and it was bad LED's.
Make sure you get the proper bright White LED's.
I overlooked this and got...Leave a comment:
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Re: Vizio - XVT472SV
budm, and all....
Just want to let you know, it's been nearly 5 months of consistent use of the TV and still no problems, since the day I jump started it with the 1k ohm resistor.
All is good, and grateful.
Also, someone just gave me (they are throwing it out) a LG 47" (47LN5700) TV, where they say the LED's are not working. So, I may be back (a new thread of course) for more.....Leave a comment:
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Re: Vizio xvt472sv - PSON Always has Voltage
jeebuzzin, thanks for the "props". But, I couldn't get as far as I did without "panda" Budm.
He's an awesome mentor and guide.
In my case, I too jumpered U33 to ground using a 820ohm resistor. And the TV has worked ever since (5 days). I can't tell you why though. I really never confirmed a failing part.
The "jump" seemed to bring it back to behaving normally.
I'm still tracking down a schematic and will make it available as soon as it's acquired.
I would...Leave a comment:
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Re: Vizio - XVT472SV
I turned it off for over 24 hours, no power at all.
Still comes on, behaving normally.
All I can do is wait for it to misbehave again.
Any comments on why it failed originally?
I now have a new LCD TV upgrade (from a 36" tube boat anchor).
Hopefully it will last for a good while.
Thanks for all the help, I hope I can pay it forward.Leave a comment:
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Re: Vizio - XVT472SV
Anyone have a schematic to this one? or at least this Main Board?
It makes tracing easier
Leave a comment:
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Re: Vizio - XVT472SV
I turned if off for about 10 sec, and turned it back on.
I get an image still. Could this be from charged capacitors helping the processor send the signal or something?
I'll try turning it off for much longer and see. It may be an intermittent issue.Leave a comment:
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Re: Vizio - XVT472SV
Every thing seems to be working now.
Do you recommend replacing the Main Board as a permanent fix, or can this "ON" signal fail be further troubleshooted? Is it software, perhaps?Leave a comment:
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Re: Vizio - XVT472SV
Now I'm testing inputs, channels, sound and features.
BTW, this TV was being thrown out, it was not mine originally.Leave a comment:
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Re: Vizio - XVT472SV
Ok, I tested it.
I'm getting an image now: "No Signal"
So, since the MOSFET stays on after jumping with the resistor, could I "rig" up a switch to turn on the MOSFET as a temporary solution?Leave a comment:
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Re: Vizio - XVT472SV
I haven't tested it yet with a resistor. But, if the Drains go to 12 and screen shows images, can I use the resistor as a "fix", or should I replace the Main Board? (Assuming I can't replace the processor, or is this a software issue?)Leave a comment:
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