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Okay ...
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I'm going to post my ATX and the boards if got in a bit, thanks!...
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Fair enough, I'm going to test the waters. Hopefully I'll learn something by messing aorund with the boards--nothing to loose but some time ...
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HI Diah,
Thanks for joining and sharing your knowledge. I've also got a few faulty mainboards and would like to have a go repairing them. In the absence of the original panels and SMPSs, I wondered if there was a way to test them using a portable power supply and a TV160 for a display? I'm hoping the get better at voltage checks, Nor, Nand, emmc, boot loader and firmware updates using programmer and fly wires etc
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Hey Davi,
Thanks for the tip. Btw, will I need to solder output wires from the ATX to the 5v and 12v lines on the mainboad? or is it possible to interface a powersupply directly onto the mainboard connector that usually goes to the SMPS?
As for Oled do you mean I should avoid this method (powering mainboard without SMPS)?
I've been thinking about this item on Ali, seems to even offer 24v, what do you think?
[URL]https://www.aliexpress.com/item/33050619797.html?spm=a2g0o.cart.0.0.227338dasrTmM2&mp=1[/URL]Hey Davi,
Thanks for the
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bump 😎, still looking for a way to power any mainboard that test it works by outputting display to a TV160 (mainboard tester), without the use of a SMPS--Essentially freeing myself form being next to the panel and SMPS, while repairing mainboards
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How to choose a substitute mainboard
Hello again Community
Anyone verse on how you go about choosing a substitute mainboard for your TV repair. Like the chap in the video below sometimes a 1:1 replacement board is too expensive and reballing a mainchip(s) maybe outside of your skillset . In the video the poster states one needs to match the replacement board with the SMPS, T-con (if not built in) and panel (and substitute cabling be also be required).
I'm very interested in choosing a suitable replacement board for any model or make of TV and the general (or detailed if your willing) step this entails....
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Thanks, photos are here: [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/3235854-samsung-ue70tu7020k-which-lines-to-tape-on-a-bad-panel[/URL]
Like I said, got mine to work but look so learn how to block lines with precision rather than trial and errorhttps://Thanks, photos are here: [UR...said, got mine
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Thanks viking, I had a look at your post. It's def a panel issue for me. In the post you signposted me to you tell the OP to remove and mask to Clk signals from the board bridging ribbon cable. I know from experience this works. However, for me, it's always been trial and error and checking the image. How can you exactly track the Clk signals to the specific points on the ribbon to mask in your example? I see some cut the signals, but I like the idea of tape that can be moved and removed.
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How to perform panel test on Samsung UE70TU7020K
Hello Community,
As part of an ongoing learning project, I'm trying to perfrom a panel test (where, according to some, you jump 12v to the (Tcon) then jump 3.3V to panel test pin on the FPC connector). For the model I'm testing with, I'm unsure of where the test pin is located (providing there is one). So, I'm after some help to locate it. Here are some shots of the board (note mainboard, Tcon combo board)....
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Samsung UE70TU7020K Which lines to tape on a bad panel
Hello Community,
I'm working on a Samsung UE70TU7020K.
It looks like a bad panel. There is only 1 FPC cable from the Tcon (built into mainboard) to the panel.
I'm using a piece of tap a few mils (covers about 8-10 pins), at different locations and have had varying results but nothing that is remotely watchable (multiple lines across all the screen, half screen and total black out on screen). The buffer board is divided into 3 boards. I've disconnected the end board one at a time but each time the screen was totally black. I presume it's because the potential...
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Thanks Lotas! Close enough It gives good details on pinouts for the boards and some useful troubleshooting techniques. I know SMPS have a general layout, but I'm still looking for the schematic for the SMPS to practice some component level repairs. The 65" SMPS in your attachment is near identical, I would welcome a schematic for that one if you have it.
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Schematic for SMPS BN44-01056A
Hello Community,
If anyone has it or can point me in the right direction, I'm after a Schematic for SMPS BN44-01056A
Thanks,
LL
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Service Manual for Samsung TV UE70TU7020kxxu
Hello BC Community,
A humble request for a service manual for the following TV, pls
Samsung TV UE70TU7020kxxu
Thanks,
LL
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Testing LED TV Mainboard without SMPS
Hello Community,
I've been looking at the TV160 mainboard tester for LED/LCD screens and wondered if there was a device for providing the required voltage to test a TV mainboard using the TV160 without the SMPS.
Doing so may allow me to work on the main board away for the larger unit with the panel and SMPS
Thanks,
LL
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