Thanks again for all of your advice.
Excellent news for you all….. the MX7000 is now working again and the picture and sound are as good as they were before the failure. This is my first ever TV repair and it was a very interesting experience for me. Without the Beoworld team contribution, this TV would have been resting down at the dump.
On the technical side, I cleaned up the pad around the pin and tested for damage. I was surprised to find that there was plenty of conductive material around the pin so I decided to do a solder repair rather than by-pass the socket. Not much room to work in but a fairly reasonable job in the end. All of the resistance measurements through the coils looked good.
On the main board, I tested the diodes and made a mistake in measuring and concluding that D82 was open in both directions. When I took the diode out it was OK so I put in a new 1N4002. I replaced capacitor C100 at the same time.
I had bought a replacement IC for TR33, the BU2508DF, but when I compared measurements on the old one and the new one, they were basically the same. So I left the old one in.
I repaired the solder joints that Nick referred to and then following his philosophy that if it is working – don’t change it, I decided to do no more. I reasoned that the burning smell had come from the small arc at the pin and the melting plastic in the socket. The picture had lost its horizontal deflection because the joint had finally broken and luckily I had caught it all before too much other damage had been caused. So I decided to reassemble the TV set and test it.
First time switching on is always a concern for me but I bit the bullet and the TV fired up first time as if nothing had happened. No more to report – it all looks good and I am still alive to tell the story.
Thanks again for all of your expertise. This MX7000 has been raised from the dead at a total cost of $1 plus some more spares in my cabinet.
Best regards to you all
Geoff
