Piano key switchs

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8521
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Piano key switchs

Post by 8521 » Thu Jan 16, 2020 10:31 am

Does anyone have any technical information about how the piano keys switches work? I have several switchs that won't function. It appears the entire panel needs to come apart to gain access.

8474
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Name: Blaine F
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Re: Piano key switchs

Post by 8474 » Thu Jan 16, 2020 5:59 pm

What do you mean "won't function"

Do you mean they don't move and are not being used to switch something? If thats the case then all you need to do is remove bolt that is holding it in the "off" position and replace it with a toggle switch and use it to switch something else such as Radio Master.

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Re: Piano key switchs

Post by 8521 » Fri Jan 17, 2020 11:44 am

The switches are very hard and stiff to move but also will not make contact internally to close the circuit. My turn coordinator and nav lights work, but will not turn on.

8474
Posts: 62
Joined: Sat May 25, 2019 12:08 pm
Location: Saskatchewan
Name: Blaine F
Aircraft Type: C140A
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Re: Piano key switchs

Post by 8474 » Fri Jan 17, 2020 3:11 pm

Ok, I suspect the toggle switches are defective. You can access them from underneath but really the only way to have full access is to remove the instrument panel ( the part that is supported by the rubber mounts) then you can see down and remove the toggle switches that are bad.

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