Jerold that circuit is so simple at that point, there are only two things that can cause heating of those caps: Either AC being fed to them, likely to cause rapid popping. Or, the cart itself is defective or inferior to use at that voltage.
RobNYC
On Saturday, January 14, 2023, 05:42:42 PM GMT-5, Jerold Kress via Jukebox-list jukebox-list@lists.netlojix.com wrote:
This is a follow up to my previous posting about issues with my Seeburg TSU5. I've isolated the problem to C514 over heating but so far have not determined the cause. I replaced C514 & C515 and R518 that bridges their negative ends. (I tested the caps to be sure they weren't shorted & the resistor's value is good.) C514 is connected to the -400V side of the 6X4 rectifier tube. I know this is a positive ground system so I was careful to replace the caps in their proper configuration, with both pos ends soldered to ground. I've switched out the 6X4 with 3 working replacements (all from working guitar amps) but C514 continues to overheat. (I shut down the system after a few seconds but in that time C514 is warm to hot.) I can test the voltage reaching this cap if that info will help in a diagnosis. Any insight into why this cap is overheating so quickly would be appreciated. Thanks!
jerold k
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