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K3569 даташит — Vdss = 600V, Nch MOSFET — Toshiba
Use a spare resistor of maybe K hooked between the D and G for an N-channel or between S and G for a P-channel Now the resistance will be low – the transistor is biased on. I’m pretty sure the other board does work, and does send the signals, since the speakers are powered from it, and they work, also it powers on the TV, i.
Different FET’s will typically overheat due to different Ron values, switching times, etc. Actually, this photo looks more like my board see brown area on the left side: If they are NLA If your FET shows signs of life with these simple ohmmeter tests, don’t bother replacing them just yet.
Multimeter in Diode position: Find More Posts by Longbow. I’m planning to just replace and see if that area of the board puts out the marked 24VDC, and if not, find the exact K transistor. If you see a low resistance, or a dead short such as 1 ohm, it is smoked. The scorch is on the full picture of the back where the high voltage wires are taped down now burnt off probably from the heat from the wires.
Originally Posted by stormy Thanks to all who helped, I’m looking forward to my next adventure!!!
Newport, OR My Country: Helping people troubleshoot electronics is a big part of what goes on here. Find More Posts by SteveNielsen. Only the Diode settings shows signs of life as described above. Find More Posts by stormy Last edited by stormy; at Mar My Country: Find More Posts by trebo. You aren’t doing something wrong. You have to check specs on the parts to dataxheet if they are close enough. All electrolytic caps are not bulged and look ok.
The time now is Briefly short S to G to bleed off any residual voltage. All times are GMT Datashee the board’s outputs, all except the 24v ccfl yields VDC.
2SK | RDD Technologies
Find More Posts by neilc6. Please make sure to put the pin number, follow by the pin names, and follow by the Voltage reading so we can tell which pin is which and what Voltage each one has.
Find More Posts by momaka. The power supply designer has carefully selected a particular FET to drive his transformer and secondary loads.
I have on hand very similar K transistors, and wondering if this is safe to exchange these two? Which picture show the scorched mark? Resistance between S and D should show an open circuit. The 24V has nothing to do with that inverter section.
There is a burnt electronics smell with the tv on. Bay area My Country: Find More 2ek3569 by budm. I will start a new thread.
LEFT most pin marked 24V, comes at 12v, and drops down as I measure, went down to 6V, and probably more, i just kept going. The 24V should be a switched 24V which will not be present at the connector until the power supply board gets the PS-ON signal from the main board.
I have a Calypso 40″ TV with the same problem. I now see it, in that case, I must’ve tested the K incorrectly, maybe it is good after all I didn’t realize I’m supposed to somehow measure from the TOP while xatasheet connector is in-place Perhaps someone with a nifty drawing program can help with a sticky.
Thanks for any tips. Originally Posted by stormy Multimeter in Diode position: Looks like there are various versions of this power supply board. Does this mean this is a good transistor? Can you post some clear hi-res photos of both sides of the actual board your working on? Trouble starting a thread since I am a new member but I have the same problem.
New 2ek3569 My Country: