Toshiba 20AF43 Purity problem

[Dan Schafer]

Hi All,
Working on a Toshiba model 20AF43, chassis M3M727, made April 2003. I have poor purity on the right & left side of the screen, (center of screen OK). Like it needs to be degauassed...I can't find my degausing coil at this time (haven't used it in years) & don't have that new of a Sam's photofact to do the purity adjustment steps. I didn't think those newer sets ever had purity issues. The magnet rings around the CRT neck are still glue fixed in place. Thanks in advance for anyone's suggestions or 2 centz.

[holmesuser01]

I wouldn't move the magnets. Find your coil. I found mine after a good day of hunting.

[Dave A]

Then there is the trick of using an old Weller soldering gun clicked on and waving the body (transformer) ala the coil if yours is hiding.

[Dan Schafer]

For those following this post...the set works fine & has no purity problem when the set is in the normal upright position with the back cover on. I had it on its side for troubleshooting. Evidently the set goes out of purity when operated on its side. I still have a problem with a bad tuner connection. When I put pressure on the rear of the tuner to the right I loose signal. A classic bad connection. I heated up all the solder joints associated with the tuner & nearby points on the circuit board and still have the bad connection the customer complained about. The customer has been putting a weight on the input cable to keep contact but it won't stay put. Maybe a hair-line crack in one of the foil traces on the board near the tuner? Looking for any other suggestions...thanks again in advance.

[DaveWM]

well I can tell you my old all tube zenith does the same thing, purity goes to heck when laid on its side, ok when upright. I had it on the side to expose the chassis thru the service saver.