Funai 40FDB7514/10 TV: LED 99V Power Supply, 17IPS20 - Correct Voltage or Too Low?

Question

Hello, as in the subject I have only a small question, is the LED 99 V power supply correct or not too low? 17IPS20 power supply. Please help.

lisek · Accepted Answer

Takie sprzedaja na (ebay) Link * matryca 40 VES400UNDS-01 , VES400UNDS-02 , VES400UNDS-03 or VES390UNDC-01 > TV 40PFL3008H/12, 40PFL3008K/12, 40PFL3018K/12 ,LT-40TW51 * 5 pasków po 9xLed (3V) Skoro zasilacz 17IPS20P PWM Power: FAN7529 (PFC), SG6742HR LED driver: MP3394S * 4-String, Max 200mA/String WLED Driver

szreder27 · Answer

Hello, probably one of the LEDs on the backlight has gone down. greetings

AWJR1951 · Answer

Their weak point - I haven't checked yet if the image is backlit by the LED flashlight in the evening I will answer.

mirex · Answer

Foretell? And what matrix? And which version of the power supply with a characteristic number? And this is the maximum voltage appearing, measured after blocking?

AWJR1951 · Answer

Sorry, I give matrixes-VES400UNDS-03 regarding the power supply, I have 060913R3-E131175 voltage after disconnecting the plug from the panel I have 108 V as I have a multimeter plugged in including the TV, I have only a jumping 5-8V but when I highlight the matrix with a flashlight, I don't see any image - empty and dark matrix.

mirex · Answer

I understand that measured between mass and D501-503, marked as V_LED +. Little. There is probably no BL_ON. And by the way of the T-CON supply voltage. I don't understand that anymore. Where plugged in?

lisek · Answer

One of the topics about this matrix and PSU link

AWJR1951 · Answer

Hello, I connected the multimeter between the A-Mass point and the B-point when it comes to LED voltage regarding T-con, the voltage measured on the fuse relative to the total mass on both sides of the fuse, I have 11.5 V.

buli1 · Answer

A colleague wrote you what is ... A simple matter connect the decoder (via euros) and if it will sound it means one.

mirex · Answer

Really? Are you sure? You tell the visitor to disassemble the matrix, who doesn't know how to measure the voltage to illuminate? Have you read somewhere in the author's statements that the voltage reaches the nominal value for this matrix even for a moment? Added after 1 [minutes]: How about the fact that currently there is (apparently) neither backlight nor image? Even if the sound appears by some miracle, is it supposed to indicate a broken backlight?

grubas · Answer

Recently, I had several pieces of different TVs on Vestel panels with the same symptom: no picture and the voice is. In any case, damaged LED strips. The standard affliction of these panels. Even after replacing with a new panel (they exchanged for a guarantee at a friend's), the TV worked for about a year and a similar defect.

mirex · Answer

Really? How many years do you fix that you can't tell the difference between no image and no backlight or both? Why does the author claim that there is no picture? He doesn't know what he is doing or is he really missing? Although measuring is not going well, but probably even if it measures the way it measures, it should be there more than 100V. Unless you prove that 100V is correct. Do you not read anything but write or read but do not understand?

grubas · Answer

Calmly. I know the difference perfectly. As colleagues wrote above. Connect something to the external entrance and then see what is on the matrix.

buli1 · Answer

mirex - and you yours. First of all - It's because the author does not see the image by the flashlight, I am convinced that there is no signal connected to the TV and he simply does not see the inscription no signal. Secondly - in my cases, when you have a voice and you do not have a picture (a lot of people confuse the concept - that there is no picture can be caused by the lack of backlight and the picture is.) 90% is the fault of the backlight or LED strips. Thirdly - I will not tell anyone to disassemble the matrix. Fourthly - you know quite recently a quite common case - no backlight and usually ends with replacing the LEDs or entire strips. I am waiting for your answer.

mirex · Answer

How do you know that he has not pressed, for example, Menu? Does any author measurement indicate your option? Show at least one example. Yes you do. Because what else is confirmation, someone's suggestion? And further exploring the topic in the same direction? Well, unless you order not to undress, but buy another. Once again please - indicate in the author's statements at least one element that would indicate that the matrix is damaged. I don't see ANYONE yet. Which, of course, does not mean that it is certainly functional.

buli1 · Answer

mirex - I won't talk to you because this is not the topic. The author himself will write what was and who was right.

mirex · Answer

Sure. Because my questions cannot be answered so that it has arms and legs. So put your tail in your legs. I made my case clear at the very beginning: And who is here?

AWJR1951 · Answer

Hello, I am sorry for the incomprehensible description of the fault, it's only because I don't deal with this type of repairs every day, that's why I asked. Thank you for your answer. with this I have one more question - is it point to insert these diodes? personally, I think that the LCD is better for me, I have a Sony KDL40X4500 despite being hungry for energy, I'm happy with it anyway. The TV I asked for was free and zero loss. I placed a damaged matrix with efficient LED backlight, if anyone is looking, please check. greetings

mirex · Answer

I do not understand. In addition After all, what matrix do you sell and which TV do you repair? And why are you mixed up in this topic? Worth it? Not worth it? And who is supposed to guess? Is BL_On? Is T-con already powered? Is there finally a picture or not? Because if there are not the first two things, it needs to be further repaired, regardless of possible damage to the backlight. After all, when switching on the TV on VLED +, full voltage should appear for a moment, i.e. about 160V, probably for this power supply and 40 matrix. And there is none. Apparently, at least this is the result of measurements. Only 100V basic voltage appears. As is the picture and the LED power supply works, then buy the whole strip. Because if you have a problem with measurements, I'm afraid that basting the strip, and even more so replacing the diodes themselves, will end badly. But try. If the whole strip, then a new adhesive tape or making holes and a proper screwing to the sheet.

AWJR1951 · Answer

Hello, as you wrote, it's not worth replacing individual LEDs, it's just a waste of time. You'll replace a few LEDs and barely turn, you will do the test, and here's the next one. Greetings and greetings to all.

AWJR1951 · Answer

Hello everyone, it seems that I am patient for so many years. Going back to the topic I bought a backlight set in China I pasted the strips and the TV turns on only the LEDs are barely lit I will add that the voltage on the LED power supply is 116V LEDs are connected in series symbol on the strips is 40 NDV REV1. 0 strips that I peeled off are VES400 UNDS 02 strip with XY284 GHB tester so new and old strips indicate 25V power supply. If you can ask what else, you can check if these straps are appropriate. Thank you in advance.

AWJR1951 · Answer

Hello, thanks to everyone, especially to the fox who led me to the fault, the led strips that I mentioned are ok, I will add that the TV earlier after switching on the power supply without the motherboard, the LEDs only turned on 5 percent as I wrote and at the moment, after replacing the controller, no reaction, if I put out the motherboard after fastening the tv disc, maybe I haven't discovered America or maybe it will give someone something to think about. Regards.

ugh123 · Answer

Hello, I have a similar problem with the backlight of this matrix as in the topic from TV Funai. At the beginning, after the extinguishing problem appeared, I put on damaged capacitors in the power supply, all of which were replaced, the test and satisfaction with it helped. It turned out after a few days that the TV works normally from time to time, but at random times it can turn off the backlight (after lighting the flashlight you can see the image on the matrix). Before I start undressing, I am asking for tips on what lists to buy to fit or what individual LEDs? I have read previous posts and I have seen suggestions as to what may fit, but I would like to finally collect this information. It is very strange for me that the backlighting seems to work in general, but it can turn off randomly, I understand that the damage is burnt. the LEDs would be permanently broken and wouldn't work at all. Please let me know how to finally check it. Regards Bartek

AWJR1951 · Answer

Hello, Bartek, I would replace the unfortunate controller that is listed above, although it costs pennies on Allegro and maybe it will help. Regards, Victor.

Funai 40FDB7514/10 TV: LED 99V Power Supply, 17IPS20 - Correct Voltage or Too Low?

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