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Don White
 
Posts: n/a
Default Hey Larry (or anyone else with IC expertises)

Larry wrote:
"Roger Long" wrote in news:YE2Uf.25288$jf2.11613
@twister.nyroc.rr.com:


http://home.maine.rr.com/rlma/MOB.htm



See those solder blobs on the PC board? Notice how they go out then taper
back in to get to the solder pads on the boards? Cold solder joints all
over this thing. A good solder joint looks like a little tapered building,
tapering from the end of the lead poking through it and wider at the base
where the solder pad is, and shiny. These blobs aren't soldered. Wriggle
the components around and one of 'em will move the blob on the bottom or
the lead inside the blob.


I had a problem with cold soldered joints on a higher end JVC TV right
after the 3 year warranty ended until I gave the thing away last month.
Most days I had to whack the thing upside it's case and the herringbone
pattern disappeared. When we upgraded to HDTV, the wife gave the JVC to
a co-worker who's husband fiddled around with TVs.
Took him half an hour to find problem area & re-solder.