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Old 06-25-2018, 10:53 PM
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Electronic M Electronic M is offline
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Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 14,762
Quote:
Originally Posted by Titan1a View Post
My Zenith 11S474 console started making noises similar to putting a stylus on a bad record then died and started smoking. At least I know the power transformer is still good.
Did you change the rubber wiring to the tuning eye? Some sets had 1-3 0f the eye tube wires usually including the B+ as rubber the rubber dries, cracks, and flakes off (especially where the eye harness passes through chassis, ask me how I know ) shorts B+ to ground and things start to smoke...

If that ain't your issue, pull the rectifier tube, if that stops the smoke check the resistance to ground of the B+ rail. The resistance should be higher than the result of dividing the B+ voltage (probably 450V) by the B+ current (probably less than 0.150A). If the B+ to chassis resistance is low, go to each point things connect to the B+, unhook everything, measure the individual disconnected paths and follow the path of least resistance to find the short.
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