[RFI] UN46D7000LFXZA Samsung TV Switching Power Supply RFI

[WD8ARZ]

Bought a Samsung LCD about a year and half ago that I just love. Bright 
screen, one of the clearest images I have ever seen. Didnt buy it for 
the 3D, but found I love it too ... no eye strain for me, but that 
varies user to user when it comes to the 3D world.

About ten months after I bought it I began to have some RFI in a couple 
of places in ham bands, and would have a popping sound from the TV every 
now and then. Sometimes would even shut down for no reason or lock up 
requiring the power cord to be pulled.

Had registered the set on the internet at the Samsung site, so I went 
back there and requested service for the problem. Immediately had a 
response and acceptance of the warranty service request and a tech was 
schedule to come out to my home.

Yep, the switching power supply was replaced. Been almost a year now and 
no problems have returned and the rfi was gone too. Must have been a 
change in the board versions is my guess.

While we are on this topic, there are two frequent failure modes for 
todays electronics. Bad components, such as capacitors for power 
supplies from China in computers and TV's, and the none lead solder 
standard.

Turns that the original ten / lead solder had a balanced chemistry. 
Todays non lead solder is not balanced and lets the tin in the solder 
grow whiskers. These whiskers grow inside chips, along the tightly 
spaced printed circuit boards, and create shorts across conductors as 
you can imagine.

Such is progress eh??

73 from Bill - WD8ARZ