Expert 5K+
Posts: 7207
Location: Victoria, BC, on Vancouver Island, Canada | What exactly is it that you need repairing? Are you talking about the push button control unit? OR? you said your daughter broke a key... ?
If the push button control isn't working smoothly they can be pulled apart and rebuilt but it takes a bit of time and skill.
There are thin sliding cams inside the switch that the push buttons control , they get dirty and worn out and the buttons get very hard to push. I rebuilt one several years ago.
If this is what you are looking for I can email you the details with photos.
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