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[Others] Anyone know what is this?

"222" marked on top of it and EF label on the PCB. Found it in a old Casiotone keyboard.
  • answered Sep 11,2020
    by Gorge
Ranking Name Answers
1 PCBWay Team 11
2 Jonathan Scher 3
3 Paul Hupman 2
4 Samarth Jiwarajka 1
5 Engineer 1
6 Ibrahim TKR 1