Question about NEC PlasmaSync PX-42VP2A 42 in. Television

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Hi In reference to Nec Model PX-42VM2A Power Supply Part Number PKG-1719 Transistor Q4 Defective Part Number on Transistor appears to be B1229 do you have a exact cross reference that will work for this part.My research indicates it may be 2SB1229 the case is TO 92 lead configuration B C E.I am finding it is very difficult finding this part.If possible would appreciate a diagram or a partial diagram of the power supply. Please Help.Thank You James Birdsall

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  • jbirds Mar 16, 2011

    Hi I think you know that i am a electrical engineer .It is said when you buy a tv in good faith you should be able to purchase a service manual it is so cheap to make a cd. The reason Q4 failed is that Q5 n channel mosfet shorted common failure.I have been retired for many years and had a tough time locating the part through my suppliers.Thank you for sending me to BD.I ordered the part the other day i think everything will be fine.Thank You James Birdsall

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James,

Unfortunately, NEC does not make service manuals available to the general public in most cases. The B1229 is most likely the 2SB1229 as you suspect. Perhpas more important is to try and determine why the transistor failed to bigin with.

The transistor can be purchased from B&D at the link below:
Link: http://www.bdent.com/

Enter the transistor number into the search box at the upper left. You will find these for 75 cents apiece.

Dan

Posted on Mar 13, 2011

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