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Hi,

I am new to the board and have a technical question. I have the opportunity to buy an MG-1 for $200.00. The person says cosmetically it is in great shape and works great except for “what happens is the octave shifts from time to time with tone source 2”. Is this a real problem, or something that can be easily fixed? The seller thinks that the problem is with the source modulator.
Thanks in advance for you input.

Please help.

I didn’t find the right solution from the Internet.

References
https://bit.ly/2w5nop9
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Thanks