[TechAssist] Magnavox 25f800. Shutdown after 2 seconds


I replaced the vertical ic. The crt 10ohm resistor checks good, and the 1ohm 
resistors in the vertical circuits check ok. No shorted zeners aroun the 
vertical. The vertical IC is getting +13 and -13v. After desolderig the flyback 
secondaries and ground, there was a small blue flame coming through the ground 
pin on the flyback. Not heavy arcing as in a shorted high voltage anode. I 
replaced the flyback, same problem. I noticed however when I desoldered the 
flyback ground, that even though it was arcing, the set stayed on. I dont have 
a schematic. Any help on this problem would be appreciated. 

PS Will removing the vertical IC stop the set from shutting down if the 
vertical is the problem?




Rodney Thomas
RT Technologies

 



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