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Newport, OR My Country: Mar My Country: 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.
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The time now is Can you post some clear hi-res photos of both sides of the actual board your working on? The 24V has nothing to do with that inverter section. I have a Calypso 40″ TV with the same problem.
I will start a new thread. Perhaps someone with a nifty drawing program can help with a sticky. Last edited by stormy; at All times are GMT Datsheet didn’t realize I’m supposed to somehow measure from the TOP while the connector is in-place Find More Posts by budm.
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. Testing the board’s outputs, all except the 24v ccfl yields VDC. Find More Posts by Longbow. You aren’t doing something wrong.
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Find More Posts by trebo. 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.
You have to check specs on the parts to see if they are close enough. Multimeter in Diode position: New York My Country: Does this mean this is a good transistor? Find More Posts by momaka. There is a burnt electronics smell with the tv on. 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.
The power supply designer has carefully selected a particular FET to drive his transformer and secondary loads. If your FET shows signs of life with these simple ohmmeter tests, don’t bother replacing them just yet.
All electrolytic caps are not bulged and look ok. Resistance between S and 2si3569 should show an open circuit. The scorch is datasheer the full picture of the back where the high voltage wires are taped down now burnt off probably from the heat from the wires. From this thread, seems like I should replace the transisors mounted on the heatsinks and test the diodes in this area. 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 – datasyeet transistor is biased on.
Originally Posted by stormy Multimeter in Diode position: So what is the exact make and model of this TV and what is it not doing?
Thanks for any tips. If they are NLA Find More Posts by neilc6. This is one place where datashret original devices should be used. I have on hand very similar K transistors, and wondering if this is safe to exchange these two?
transistor substitution Questions & Answers (with Pictures) – Fixya
If you see a low resistance, or a dead short such as 1 ohm, it is smoked. Briefly short S to G to bleed off any residual voltage.
Page 1 darasheet 2. For example, an “HBA” board claimed to be working, despite the burnt signs Do you think I can exchange the CNF1 connector from my bad board to one of these used boards?
Find More Posts by fzabkar. The second part of the test involves putting a little bias on the gate.
(PDF) K3569 Datasheet download
That big long board on the left is the Balancer Board. Find More Posts by stormy Please make sure to put the pin number, follow by the pin names, dataxheet follow by the Voltage reading so we can tell which pin is datasheeet and what Voltage each one has.
Last edited by budm; at I now see it, in that case, I must’ve tested the K incorrectly, maybe it is good after all Thanks to all who helped, I’m looking forward to my next adventure!!!