esemilio
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Jan 12, 2013, 3:26 AM
Post #3 of 13
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Re: [Ron.M] 46" LXI/Magnavox Power Supply Problem
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Ron.M, 1) Thanks for responding. 2) It is a LXI model 626.54461850. (Assembled July 1988). 3) A block wiring diagram with the set shows a "APW009 power panel", "AIO338 deflection module" & all the other modules. I monitored the voltage on the J107 connector on the power module - on the wiring block diagram it is marked +200V ETH REF. The voltage stays steady at 177-176 and I have a stable good picture and sound; 5-15 minutes later the voltage starts drifting lower - the picture flickers - sometime it "recovers" most of the times picture gets worse - lose color, gets a little smaller, sound goes down. IT is not watchable. Turn set off and, 1-2 sec later, back on picture and sound sometimes recovers sometimes not. If I wait a little longer in come on OK for another 5-10 minutes. 4) I have some basic electronic experience -can solder, know about cap & resistors, basic electronic circuits, & understand danger of high voltage; I have replaced the HOT on both modules 6-8 years ago. 5) I have resoldered many spots on the deflection and power panels looking for a cold solder spot, replaced the 100mfd 200V cap on the power panel mentioned in some of the posting I reviewed-I have been shooting in the dark because the panels are interconnected it has been hard for me to diagnose. 6) I can take pictures
(This post was edited by esemilio on Jan 12, 2013, 3:29 AM)
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