Question about Harman Kardon HK595 Computer Speakers

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U1, p16ne next to u2, ta8225h are both shorted, replaced both, system still will not power-on, u1 is a power mosfet.

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I have a set without power cord or adapter. You can have it..

Posted on Nov 11, 2010

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Unless you have an ESR meter and can check all the capacitors in the PSU for ESR, your voltage readings are not valid.

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Good day!!!!


That problem is cause of shorted bridge diode or power mosfet..

just see the picture below to see the image of bridge diode and power mosfet..

bugoy31_16.jpg

If you don't have a tools or you have no electronic background you only have to is order the new power supply board..

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TV LOEWE 8784. Died SPP11N60S5 in the power supply. After replacement of the MOSFET the TV worked for a day then next morning it died again on a start. This way were killed 3 MOSFETs. What could be the...


Possible that when the MOSFET'S were changed the Switch mode oscillations were not proper and so the drivers were driven too much to fail.
It will be best to replace the whole power supply if the mosfets are heating up more than required.
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Bonjour, comment faire un reset total pour revenir a la configuration d'origine du d7000? merci


Bonjour cher ami, vous pouvez revenir aux réglages par défaut en appuyant avec un point vert ("Qual-+/-") simultanément pendant quelques secondes.
Pour réinitialiser les paramètres personnalisés que d'autres: se déplacer U1 ou U2 le commutateur de mode U1 ou U2, appuyez sur Menu et vérifier U1 ou U2 Ok sélectionnez Restaurer, cliquez sur OK.

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IF I HAVE A MOTOR WITH STAR DELTA WINDING AND NO LABELING IS DONE HOW WILL I CONNECT THE CABLES TO THE MOTOR


the motor will have 3 pairs that can be checked with a ohm meter for continuity. each pair has a start and a finish. usually it would be labelled U1 V1 & W1 for the start and U2 V2 & W2 for the end or finish.

To connect in star ( Motors that start with direct load ) supply cables to U1 ( Red ) V1 ( White ) W1 ( blue ) and bridge out U2 V2 & W2.

To connect in delta Supply cables as above. Bridge U2 to V1 - Bridge V2 to W1 - Bridge W2 to U1.

If you have a reversed winding the motor will growl and not turn.
To reverse direction of rotation swap any 2 supply cables ( But only when the power is OFF )

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problem lies in the motherboard there is mosfets on the motherboard which is short and because of short circuit protection power supply goes off itself so either replace the motherboard or repair

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1 Answer

ED14 on the powersupply of lrm-519 need replacing


This item is a MOSFET Power Switch. The part # FSDH0165D. Can be found below

www.mouser.com/Search/Refine.aspx?Keyword=512-FSDH0165D

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