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No -36v on power amp Peterson suitcase

Started by craig, May 20, 2020, 10:04:31 AM

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craig

Hi all - fixing a Peterson suitcase and my unit plays/powers up, etc, but there is a pretty significant buzz and I think I traced it to a problem with the -36v as I don't get a correct reading either on the bridge rectifier or the molex connector for -36. I get the 24v and +36v, but 378.??? where -36v should be. Any thoughts? Thanks!

sean


Three Hundred and Seventy Eight?

Izzatta Typo?


Sean

sean





http://www.fenderrhodes.com/org/ch11/fig11-10.jpg

Are the diodes good and not backwards?  See CR3 and CR4 in schematic.
That pilot light is a little neon blub, right?

Have you looked at the AC voltage at the output of the power transformer?


craig

Thanks Sean...broken multimeter. So lame!