SOURCE: need an operator's manual for Yamaha Elecone organ model MFX-7420
Have you tried joining at the Electone Zone at www.electone.com? It looks like a fun site and its free to join. Maybe one of the members there can kindly help you.
SOURCE: Model C-60 Yamaha organ. Loud hissing sound
This is likely in the power amp or the drivers for it.
The key to troubleshooting is a schematic. Try to procure one.
You MIGHT try using circuit cooler in the area of the power amps to isolate a bad component or cracked circuit board.
SOURCE: I need the service manual or schematic for a
Go to the electone forum at electone.com and ask there.
Also the organ forum
http://organforum.com/forums/forumdisplay.php
When there, go into the home organ section.
SOURCE: need an operator's manual for yamaha electone el-15
You can find it here
http://www2.yamaha.co.jp/manual/pdf/emi/english/ele/EL15E.PDF
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