| 摘要 |
PURPOSE:To easily replace a crystal oscillator equipped inside he box body of the selective radio call system receiver. CONSTITUTION:In a box body 1, a crystal oscillator 3 and a first opening part 1a capable of connecting and detaching a printed board 2 to be mounted on this, are provided. A second opening part 1b capable of taking in/out the crystal oscillator 3 in the box body 1 is provided, and the crystal oscillator 3 is freely attachable and detachable to the printed board 2 using a first opening part 1a. The crystal oscillator 3 can be taken into/out of the box body 1 using the second opening part 1b and the crystal oscillator can easily be replaced.
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