I inherited a 32 inch widescreen TV, a CRT one but ok for my computer room. It was working before I got it but it had been put in storage for a few months and shaken around by removal men. When I came to start using it I soon discovered that it had developed an annoying fault: it would randomly turn itself off every ten minutes or so.
I left it switched off for a few weeks, watching a 14 inch portable instead (or rather daughter watching cbeebies on it). This weekend I was inspired to do something about it so I looked up the model number (Hitachi C32WD2TN) and googled for it.
There were various comments about dry joints so I took the main board out (very easy, a single board about a foot square) and ran a soldering iron over all dry looking joints. This didn't fix it, no joy. I googled some more and found this one message on a forum, written by someone called 'guest':
Hello, Apart from checking all stabiliser ICs', links (solder top and bottom), etc.and checking for poor connections, there was a mod., to add a spring from the top of the wire clamp on the LOPTX, to the heat sink of the line transistor -(this was for the set going into standby, but coming out, if switched on via the handset.) Best of luck
I figured out that LOPTX meant 'line output transformer' and by googling for this I determined roughly what one looked out. The one in my TV had a [ shaped clip which I determined was the 'wire clamp'. About 3/4 inch from this was a heatsink, presumably on the line transistor. I rigged a piece of wire between these and gave it a try.
Well I ran it for seven hours on sunday and again for an hour or two today and problem seems to have gone away.
Interesting to note that the tube was made by LG.
Peter's Moblog
