| 摘要 |
PROBLEM TO BE SOLVED: To provide structures of the casing and circuit board of an electronic device, which detects beforehand approach of generation of an electric connection failure of a mounted component on the circuit board. SOLUTION: This device is equipped with: the circuit board arranged inside the assembled casing, whose part is fixed between a first boss part and a second boss part; a first conductor and a second conductor formed in a clearance provided between the first boss part and the circuit board; a third conductor formed between the first boss part and the first conductor, and between the first boss part and the second conductor, for connecting electrically the first conductor to the second conductor; a first wiring and a second wiring formed on the circuit board, and connected electrically to the first conductor and the second conductor respectively; and a measuring circuit connected electrically to the first wiring and the second wiring, for measuring an electric characteristic value of the first conductor or the second conductor. COPYRIGHT: (C)2009,JPO&INPIT
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