Hello,
I have an Allen 120-C model. I believe there is an issue with the voltage settings on the power supply box. The organ "only" produces an either deep hum or a high pitched squeal (when the transposer is at A440) and disables the function of the keyboard and stops. The only way to silence the hum and squeal has been to adjust the voltages, however, it then silences the entire organ including the stops and all keyboard functions. In setting the voltages to the -5, 5, and -27 voltage levels with a multimeter noted on the supply unit, the deep humming persist and all keyboard function does not work. Seeing how the PSU controls have been the only way to either control the hum, at the expense of functionality, it seems that the issue must involve the unit. The fuses in the box are not blown and all the capacitors seem to be normal. The organ worked fine as of a week ago.
Has anyone experience this before? Will the repairs be inexpensive? I appreciate any help, feedback, or comments.
I have an Allen 120-C model. I believe there is an issue with the voltage settings on the power supply box. The organ "only" produces an either deep hum or a high pitched squeal (when the transposer is at A440) and disables the function of the keyboard and stops. The only way to silence the hum and squeal has been to adjust the voltages, however, it then silences the entire organ including the stops and all keyboard functions. In setting the voltages to the -5, 5, and -27 voltage levels with a multimeter noted on the supply unit, the deep humming persist and all keyboard function does not work. Seeing how the PSU controls have been the only way to either control the hum, at the expense of functionality, it seems that the issue must involve the unit. The fuses in the box are not blown and all the capacitors seem to be normal. The organ worked fine as of a week ago.
Has anyone experience this before? Will the repairs be inexpensive? I appreciate any help, feedback, or comments.
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