Author Topic: No -36v on power amp Peterson suitcase  (Read 103 times)

Offline craig

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No -36v on power amp Peterson suitcase
« on: May 20, 2020, 10:04:31 AM »
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!

Offline sean

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Re: No -36v on power amp Peterson suitcase
« Reply #1 on: May 20, 2020, 12:24:07 PM »

Three Hundred and Seventy Eight?

Izzatta Typo?


Sean

Offline sean

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Re: No -36v on power amp Peterson suitcase
« Reply #2 on: May 20, 2020, 12:46:11 PM »




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?


Offline craig

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Re: No -36v on power amp Peterson suitcase
« Reply #3 on: Yesterday at 07:34:11 PM »
Thanks Sean...broken multimeter. So lame!