Problem to be solved: to provide a mounting jig attaching method and a mounting jig positioning device having a simple configuration for disposing a desired tone arm of a user having a different shape and quality on the substrate.In the mounting jig positioning deviceMounting jig xThe vertical rotation part 5 to be fitted into the center pin 4 of the turntable 3 of the record playerA predetermined length of arm 6, which is integrally provided perpendicular to this vertical rotation part, andA mounting jig body 8 having a vertical rod 7 suspended at an end portion of the armHaving a reference plate 9C formed with a through hole 10 for receiving the lower end of the vertical rodAndIt is composed of a tone arm mounting base 9 installed on the upper surface of the base 1.The tone arm mounting stage is fixed to the upper surface of the base with reference to the vertical rod positioned in the concentric circle of the center pin in the state where the lower end portion of the vertical rod is inserted into the through hole end portion for the base end shaft portion of the tone arm desired by the user.Diagram
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