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Vintage Synth Repair

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Roland SH 101 power adaptor problem

2010-03-03 by Miguel Mendoza

Hello group, I'm having a problem with my Roland SH 101:
When I turn it on, it takes some time to start working. After this, the synth is completly out of tune.
After some time, the external power supply is getting very hot and I turn it off.
I tried with several external power adaptors with the same result.
I think that it could be a problem with the internal voltage regulator or a conderser but I would like to know if any of you know anything about this problem or have any idea of what it could be.
Thanks a lot in advance.
Regards.
Miguel.

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