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Hey, forum.
You've been supremely helpful in the past with my various Hammond organs. I recently took the plunge with a 1967 Yamaha Electone D-2B because it was 2 blocks away, was rebuilt by a Yamaha dealer in the 80s, was meticulously maintained, and was FREE.
There is a 1-second hum from the speaker when I power it on, which then dies away, leaving barely noticeable hum from the speaker. There is no sound from the speaker or the headphone jack when the manuals are played. The volume pedal doesn't change the volume of the background hum. The power indicator lights up, and the rotating speaker rotates as it should.
One interesting thing I discovered is that if the trim pots on the power amp are turned, there is the loud sound of a dirty pot coming from the speaker. In other words, the amp seems to be able to amplify things, but the organ's signal just isn't getting to it?
Now, about that supposed rebuild. I'm thinking the caps in the power supply etc were replaced because while they certainly look old, they're not 1967 old. (At least, they look nothing like the caps in my Hammonds from the 60s.) Doesn't mean they haven't failed, though. Nothing inside looks tampered with. All wiring seems intact and well seated in its appropriate connectors. This organ was well cared for by one owner since purchase.
Now, I've got a service manual from the Bay on the way. But just in case there are obvious things I could be checking before it arrives, any ideas? If this were a Hammond I'd dive right in and start ripping things apart. But I am out of my element. Your wisdom is greatly appreciated!
You've been supremely helpful in the past with my various Hammond organs. I recently took the plunge with a 1967 Yamaha Electone D-2B because it was 2 blocks away, was rebuilt by a Yamaha dealer in the 80s, was meticulously maintained, and was FREE.
There is a 1-second hum from the speaker when I power it on, which then dies away, leaving barely noticeable hum from the speaker. There is no sound from the speaker or the headphone jack when the manuals are played. The volume pedal doesn't change the volume of the background hum. The power indicator lights up, and the rotating speaker rotates as it should.
One interesting thing I discovered is that if the trim pots on the power amp are turned, there is the loud sound of a dirty pot coming from the speaker. In other words, the amp seems to be able to amplify things, but the organ's signal just isn't getting to it?
Now, about that supposed rebuild. I'm thinking the caps in the power supply etc were replaced because while they certainly look old, they're not 1967 old. (At least, they look nothing like the caps in my Hammonds from the 60s.) Doesn't mean they haven't failed, though. Nothing inside looks tampered with. All wiring seems intact and well seated in its appropriate connectors. This organ was well cared for by one owner since purchase.
Now, I've got a service manual from the Bay on the way. But just in case there are obvious things I could be checking before it arrives, any ideas? If this were a Hammond I'd dive right in and start ripping things apart. But I am out of my element. Your wisdom is greatly appreciated!
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