| 摘要 |
<p>PROBLEM TO BE SOLVED: To speedily and easily discriminate the propriety of the state of connecting the input and output terminals of a microcomputer packaged on a printed wiring board by an electronic controller. SOLUTION: Plural input terminals 10, 11, 12, etc., of the microcomputer are assigned to plural output terminals 20, 21, 22, etc., in one-to-one correspondence. When the changes of the respective input terminals 10, 11, 12, etc., appear in the outputs of the correspondent output terminals, absence of abnormality in the connecting states of input and output terminals is confirmed. When there is an abnormality, according to the conditions of abnormality, a cause such as soldering defect in the related input or output terminal is estimated and abnormality is removed by correction. When the number of input terminals and the number of output terminals are different, plural input terminals are assigned to one output terminal or output terminals more than the number of input terminals are assigned so that the state of connecting input and output terminals can be confirmed.</p> |
