as mentioned above there are many have this range as N Channel Drain MOSFET Transistor and could be better rather than the one you have on boards.. look on yours scrap PSU and check the MOSFET at hot area which always being installed on heatsink close to Transformer.. read the name and google it data sheet.
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600V 700 or 750 are Max. the circuit will be no more than 380V., Ohms also are the MAX mean 45Ohm can handle 35Ohm , the cap 47 2KV remain same value at all valuesComment
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I decided to wait for the part, since $5 and exact replacement.
Installed new fuse, new blue cap and new mosfet. But cold side still gets no voltage.
I get 16x volts on main caps. Now that voltage is on both sides of the fuse. The mosfet and blue cap also get the 16x volts. I've checked both other mosfet s for shorts and blue caps and all looks well.
The fuse didn't blow again when plugged in and I've been trying to get voltage but no dice. Any advices on what to look for?Attached FilesComment
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This means that you missed something, check the large low-resistance current resistors (2 pieces are visible), on the reverse side there are SMD diodes, zener diodes, resistors, the PWM could also suffer due to the mosfet...Comment
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So I found a replacement "for parts" one connect for $25 on eBay, decided I could get somewhere with it. Ended up working.
So the Pin that looked damaged was NOT a problem. This was a OCB explosion. I have way too many TVs so I got to move it out quickly and won't know why the old OCB went bad, but I will try to figure it out and I'll post. Thx all for effortsComment
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Yes it was working. The seller had like 300 one connect boxes all listed for parts as they just didn't test them.
https://www.ebay.com/itm/23521586733...mis&media=COPY
This may work for you. This was what I bought, if the link works. Same seller thereComment
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Tonight I also tried to repair this power supply and in my case the repair was successful. I first replaced the MOSFET T70R380P by part 70S360P7 (IPA70R360P7SXKSA1) and the fuse. The ceramic capacitor was OK in my case. After replacing the parts there was still no output voltage. I checked the circuit with my oscilloscope and saw there was no chopping signal on the MOSFET's gate. So I checked the circuit that drives the gate and saw a blown 2.2Ω SMD resistor (marking 2R20) and I also suspected the IC being faulty.The type number of the IC is SSC3S211 by the way. I replaced both parts and the power supply had a correct output voltage. I finally connected the One Connect cable and the screen was immediately working great again. I hope these additional tips will help you repairing this power supply. Good luck!Comment
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I just opened it a couple weeks ago and still could not figure it out!! I will look into this! Thanks. I'll post my results here as well, appreciate it.Comment
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The earth magnets are there to hel pull and hold the TV tight and flush against the metal wall mount and the wall. THis aids in giving it that zero gap (picture frame) profile that ppl pay a premium for on these sets.
I wonder if it would be good preventative maintenance to install a small fan on these boxes. These are passively cooled but I'm pretty sure that overheating is major contributing factor their early demise.Last edited by KYBOSH; 11-28-2024, 09:19 PM.Comment
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The resistor was not shorted, but internally blown. So there was an open connection. I temporary soldered a normal 2.2Ω resistor and checked with my oscilloscope whether the IC generated a gate driver signal again. That was not the case despite the fact that the IC received a voltage from the power supply. Other surrounding components were all OK, so I concluded that the IC must be broken too. I replaced the IC together with the SMD resistor and that happily worked for me!Comment
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Smd is also blown for me as well. Will update once I find a smd and some time to mess with itComment
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Yes you did. I was able to get the 12v line back up and running also. Although I didn't get the TV to work. Just keeps 1 red light blinking. Not sure what's going on. No real hopes for it though as it was water damaged in Milton so I did this repair just to see if I could fix the ocb.. which is probably fixed. Could be the wire, who knows now but I get solid 12v and the TV gets what looks like proper voltages
Well done. Same exact mosfet blown as you and the fix is there.Last edited by EazyBone; 12-16-2024, 08:42 AM.Comment
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I picked this one up today.
Previous owner says no signs of life.
TV looks immaculate and its a 2022 model year so I thought maybe the one connect cable was damaged.
Got it home and put it on the Kill-A-Watt power meter and it was completely dead.
The TV model is QN65LS03BAFXZA - version: CB06
The One Connect Box BN44-01066D / BN96-54788Q / BN39-02470A.
I immediately remembered EazyBone's Samsung The Frame TV no power....One Connect thread and am preparing myself to tear the One Connect open and hunt for dead parts.
Will keep you all... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Hello, I removed the graphics card from my laptop and I want to heat it in the oven. What I want to ask is, is it okay to heat the card without removing the metal mounting frame on it?
As you can see in the photo, there is a plastic (black) gasket between the metal frame and the card. It sticks the frame tightly to the card.
I previously removed the metal frame while heating it, but it is quite difficult to separate it from the surface it is attached to. If there is no problem, I do not want to remove it.
What worries me right now is the possibility that... -
Hi everyone,
I'm hoping someone might be able to offer some guidance on repairing a Wine Enthusiast N'finity 170 bottle wine cellar, model 273 02 70.
I recently acquired this unit for free via Facebook Marketplace, hoping to fix it up as a gift for my wife. I have some basic electronic skills (comfortable with a multimeter, basic soldering, identifying components) but I'm definitely not an advanced technician.
The main challenge is that when I picked up the unit, the main control/power board had already been removed and the previous owner said it needs a... -
Some new tvs have an LCD screen attached to the outside of the frame with foam tape. These are "edge to edge" as they are called. I am trying to figure out how to reattach an LCD panel back up to the frame. The manufacturer used 3/16 inch foam tape along the top and rh/lh edges. I used a razor blade to separate the panel from the metal frame. The metal frame that the panel is taped to is 1/4 inch wide along the 2 sides and top. I completely removed the residue from the metal frame. There is some residue on the panel itself along the 3 edges, I removed almost all of it using alcohol and...
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