RT-3 Vibrato Control switch section

[CrazyKeys72]

Hi everyone....
Dear friends, I need your advice on how to intervene ....
It happens that recently, my RT-3 with the "Vibrato" section behaves strangely ..... so, when you only press the Swell card, the vibrato should work only on the upper manual right?
Instead it also works on the lower manual, then enabling the Great button, which should work only on the lower manual and on the pedals, is the same thing, the vibrato works on both manuals, besides on great it is as if the effect is doubled .. .in fact it is more powerful.

And it works above and below even if I disable swell.

Thanks from now for a very useful help.
Henry

[enor]

Most likely you have crystalline hair growing in the vibrato switch box, shorting out the switches. Take the switch apart and clean it out.

[CrazyKeys72]

Hi Enor, thank you! ..... I understand, it is the one where there is the shaft with a pair of helical gears .... it is the long box inside the boxed bar, which is under the Dwb, (Zinc dendrites problems) I had carried out this cleaning in 2016 when I reviewed the DWBs, but I remember finding everything clean .... could it be that these dendrites have formed since then? ...
Recently, after a couple of weeks, I carried out the usual annual maintenance, various cleaning and lubrication, was the vibrato scanner always revised on that date, that there was too much oil?

[enor]

No, your fault suggests a short in the other switch box (the one with the vibrato selectors and the "volume soft".

[CrazyKeys72]

OK thanks! I'll look first there ....
Many greetings.
henry

[CrazyKeys72]

Unfortunately the problem remained ....

I disassembled clean and lubricated the three boxes .... Vibrato control - Vibrato selection and also the percussion one, inside I didn't find any form of dendrite,
they look new, everything perfect. ..

I also looked at the percussion one because with precussion inserted, selecting the volume perc. on normal, the defect disappears, only with a vibrato swell key ...
if I put vibrato on great, I have it on both manuals.

And now it becomes more difficult to find the anomaly .... for me who am more of a mechanic than an electronic technician, I just hope he leaves as he came.

Ciao !
Henry