Abstract: To study the diagnostic problem of W-A and W-O+W-A interconnect fault of PCB（Printed Circuit Board），modified boundary scan interconnect diagnosis algorithms for W-A and W-O+W-A are put forward.These algorithms take the research experience of modified W-O adaptive algorithm as example，apply modified W-A anti-aliasing algorithm and walking zero sequence，test sequence with both W-O and W-A diagonal independence，modified adaptive algorithms W-A and W-O+W-A are gained.

Key words: boundary-scan, interconnect diagnosis, adaptive diagnosis

摘要： 针对电路板线与（W-A）以及线或和线与（W-O+W-A）共存的互连故障诊断问题，提出了针对W-A和W-O+W-A的改进的边界扫描自适应互连诊断算法。借鉴改进的W-O自适应算法研究经验，由改进的W-A抗误判算法+移位“0”序列得到改进的W-A自适应算法；采用同时具备W-O和W-A对角独立性的测试序列得到W-O+W-A的改进的自适应算法。

关键词: 边界扫描, 互连诊断, 自适应诊断