A pinched wire somewhere? A solder glob which went astray and is shorting something out?
Maybe you could post a high resolution image from the underside of the chassis for others to view and possibly help you pinpoint the problem?
"A picture is worth a thousand words"
Donald R. Resor Jr. T. W. & T. C. Svc. Co. http://hammondorganservice.com Hammond USA warranty service "Most people don’t have a sense of humor. They think they do, but they don’t." --Jonathan Winters
-----Original Message----- From: jukebox-list-bounces@lists.netlojix.com jukebox-list-bounces@lists.netlojix.com On Behalf Of Jerold Kress via Jukebox-list Sent: Sunday, January 15, 2023 3:34 PM To: jukebox-list@lists.netlojix.com Subject: [Jukebox-list] FOLLOW UP TO SEEBURG TSU5 ISSUE
It was suggested I test DC voltages to both C514 & 515 as well as pull the 6X4 and test the AC coming in. 80VDC on C514. 69VDC on C515. C514 was heating up with these tests so I switched off the machine as soon as I could read the voltage. With the 6X4 pulled I next tested 313VAC coming from the transformer to pin 7 of the 6X4 socket but then something unexpected happened: C514 blew. There should have been no voltage reaching either cap with the tube pulled. This suggests a short somewhere but I can't visually see any short. How else would voltage reach the caps? I'm replacing both caps & getting a new 6X4 next week but I don't see this solving the problem if the cap blows with the tube out. Any ideas or suggestions welcomed.
jerold k
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