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In view of the inefficiency and lack of instrument in bare board testing, In this paper approach for bare board auto- testing based on functionality expansion of S20 flying probe is proposed. 針對手工測試電路板光傚率低下、測試手段不足等問題，本文提出基於S20飛針測試設(shè)備功能擴(kuò)展來實(shí)現(xiàn)電路板光板自動化測試的方法。