Roland HP-860 electronic piano has HUM
On Sep 11, 12:12 am, Geo wrote:
On Wed, 10 Sep 2008 09:58:27 +0100, "Arfa Daily"
wrote:
However, I don't think that he has the necessary professional
background in service, to be able to run down a problem like this by
disconnecting things, and running alternate grounds ... :-\
Reminds me of an on-site repair job at a Scottish University (on a DVM). The Phd
looking over my shoulder at the circuit points to the 1uF capacitor in the
integrator section and says that will be the problem.
I went for the 10M resistor rather than the polypropylene cap...
Geo
Please tell me more, elaborate. This is interesting
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