Diapason work correctly throughout the compass. The top notes of the lower manual are handled by a separate 147248 top-note keyer LSI on the upper manual board, that serves both manuals independently.Ĭheck whether the complex voices e.g. It is still possible for a 147247 to cause this problem however, if its output shorts and grounds the signal from its buddy that handles the other six notes, which is wired directly in parallel. If an entire octave fails, it is less likely to be a divider fault because this model uses the 147247 divider/keyer LSI which handles only 6 notes within each octave. One switch way is used per footage, per octave, so a dead 4016 can cause the faults you describe. By last octave do you mean top? And by 'no matter what' do you mean with all the stops off? If so, you might have faulty analog switches rather than faulty dividers. I can't quite understand your description. This part of the circuit is a complete jungle if you don't have the schematic.Ģ. ![]() So your fault might be near the DC keyer output or more likely in the signal routing on the voicing board. The sustain voices come from the DC keyer board, the solo voices from the divider/keyers on the upper manual board via filters on the voicing board. So it is unclear even whether the problem is before or after the pot. However although there is only one control it is a dual gang pot that controls the two sets of voices in totally separate signal paths.
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