{"id":8625,"date":"2020-02-05T08:28:00","date_gmt":"2020-02-05T00:28:00","guid":{"rendered":"\/\/m.letratesoro.com\/?p=8625"},"modified":"2021-10-14T11:26:09","modified_gmt":"2021-10-14T03:26:09","slug":"tranz1230-qc-story","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2020\/02\/tranz1230-qc-story\/","title":{"rendered":"\u300a\u6848\u4f8b\u300bTranz1230\u751f\u7522\u826f\u7387\u6539\u5584\u7684\u54c1\u8cea\u6b77\u7a0b(QC Story)"},"content":{"rendered":"

<\/p>\n

\u9019\u4efd\u300a\u54c1\u8cea\u6b77\u7a0b(QC Story)<\/a>\u300b\u6848\u4f8b\u5831\u544a\u662f\u5de5\u4f5c\u718a\u5728\u5e7e\u5e74\u524d\u5beb\u7684\uff0c\u7576\u6642\u50c5\u63d0\u4f9b\u7559\u8a00\u5f8c\u7d22\u53d6PDF\u6a94\u6848\u7684\u56db\u5f35\u5716\u7247\uff0c\u73fe\u5728\u5247\u628a\u5b83\u5beb\u6210\u90e8\u843d\u683c\u6587\u7ae0\u7d66\u5927\u5bb6\u53c3\u8003\u3002<\/font><\/p>\n

\u54c1\u7ba1\u6b77\u7a0b\u7684\u91cd\u9ede\u5176\u5be6\u5c31\u662f\u628a\u6574\u500b\u54c1\u8cea\u6539\u5584\u904e\u7a0b\u7576\u6210\u4e00\u500b\u6545\u4e8b\u4f86\u8aaa\u7d66\u807d\u8005(\u9577\u5b98\u6216\u76f8\u95dc\u4eba\u54e1\uff09\u4e86\u89e3\uff0c\u6240\u4ee5\u5831\u544a\u4e2d\u7d93\u5e38\u9700\u8981\u904b\u7528\u5230\u8a31\u591a\u7684\u54c1\u7ba1\u5de5\u5177\u8207\u5716\u8868\u4f86\u8f14\u52a9\u8aaa\u660e\u3002<\/font><\/p>\n

<\/p>\n

\u300a\u54c1\u8cea\u6b77\u7a0b(QC Story)\u300b\u7684\u5831\u544a\u65b9\u5f0f\u57fa\u672c\u4e0a\u5c31\u662f\u8b93\u5beb\u5831\u544a\u8005\u6709\u4e00\u500b\u53ef\u4ee5\u9075\u5faa\u7684\u6b65\u9a5f\u8207\u7bc4\u4f8b\uff0c\u5c07\u5831\u544a\u5beb\u51fa\u4f86\uff0c\u8b93\u8b80\u5831\u544a\u7684\u4eba\u53ef\u4ee5\u6e05\u695a\u4e86\u89e3\u54c1\u8cea\u554f\u984c\u767c\u751f\u7684\u4f86\u9f8d\u53bb\u8108\u8207\u89e3\u6c7a\u65b9\u6cd5\u3002\u5982\u679c\u4f60\u9084\u4e0d\u662f\u5f88\u6e05\u695a\u4ec0\u9ebc\u662f\u300a\u54c1\u8cea\u6b77\u7a0b(QC Story)\u300b\uff0c\u53ef\u4ee5\u53c3\u8003\u9019\u5169\u504f\u6587\u7ae0\uff1a
<\/font>
QC story\u54c1\u8cea\u6539\u5584\u6b77\u7a0b(\u6545\u4e8b)\u65b9\u6cd5\u89e3\u8aaa<\/font><\/a>
News Letter: \u300cQC Story Sheet \u55ae\u5f35\u8868\u683c\u300d\u958b\u653e\u7d22\u53d6<\/font><\/a><\/p>\n

\uff08\u5c0d\u65bc\u5927\u9678\u90a3\u4e9b\u76dc\u6587\u7db2\u7ad9\uff0c\u8907\u88fd\u8cbc\u4e0a\u672c\u7ad9\u6587\u7ae0\u5f8c\uff0c\u5c45\u7136\u9084\u6539\u6210\u81ea\u5df1\u516c\u53f8\u7684\u540d\u5b57\uff0c\u611f\u5230\u7121\u6065\uff01\u6587\u7ae0\u5167\u5bb9\u90e8\u4efd\u9632\u6b62\u8907\u88fd\u7de8\u6392\u53ef\u80fd\u9020\u6210\u60a8\u95b1\u8b80\u7684\u4e0d\u4fbf\uff0c\u8acb\u898b\u8ad2\uff01\uff09<\/em><\/p>\n


\n

QC story for Tranz1230 Quality Improvement
Tranz1230\u751f\u7522\u826f\u7387\u6539\u5584\u7684\u54c1\u8cea\u6b77\u7a0b<\/strong><\/font><\/p>\n

Prepared by: \u5de5\u4f5c\u718a
Created date: 20-Aug-2012 <\/p>\n


\n

1. Problem Selected<\/b>\uff08\u4e3b\u984c\u9078\u5b9a\uff09:<\/b><\/font><\/p>\n

\n

Yield rate improvement for Tranz1230 product final assembly.<\/font><\/p>\n

Tranz1230\u7522\u54c1\u7d44\u88dd\u826f\u7387\u6539\u5584\u3002<\/font><\/p>\n<\/blockquote>\n

2. Why selected<\/b>\uff08\u70ba\u4f55\u9078\u64c7\u9019\u500b\u4e3b\u984c\uff09:<\/b><\/font><\/p>\n

\n

The target yield rate is 95% for New product Manufacture Release sign off.<\/font><\/p>\n

\u6839\u64da\u516c\u53f8\u898f\u5b9a\u8981\u6c42\uff0c\u65b0\u7522\u54c1\u91cf\u7522\u524d\u7684\u826f\u7387\u81f3\u5c11\u5fc5\u9808\u9054\u523095\uff05\u4ee5\u4e0a\uff0c\u800c\u4e14\u4e0d\u826f\u7387\u5fc5\u9808\u6301\u7e8c\u6539\u5584\u4ee5\u907f\u514d\u505c\u7dda\u98a8\u96aa\u3002<\/font><\/p>\n<\/blockquote>\n

3. Current Status\uff08\u73fe\u6cc1\u8a55\u4f30\uff09:<\/b><\/font><\/p>\n

\n

Tranz1230 got low yield rate. The yield rate trends to worse from 90.6% down to 66.1% and loses control.<\/font><\/p>\n

\u751f\u7522\u7dda\u53cd\u994b\u7522\u54c1\u826f\u7387\u5831\u544a\u504f\u4f4e\uff0c\u4e14Tranz1230\u7684\u7522\u54c1\u826f\u7387\u6709\u6301\u7e8c\u4e0b\u964d\u7684\u8da8\u52e2\uff0c\u6839\u64da\u751f\u7522\u4fee\u7406\u5831\u8868\u53ca\u8cc7\u6599\u6536\u96c6\u5f8c\u986f\u793a\u539f\u672c\u7684\u826f\u7387\u5340\u9593\u843d\u572885\uff5e91\uff05\u4e4b\u9593(2\/23~3\/16)\uff0c\u4f46\u81ea\u5f9e4\/1\u5f8c\u826f\u7387\u5c31\u4e00\u76f4\u4e0b\u964d\uff0c\u800c\u57284\/6\u964d\u4f4e\u523066.1\uff05\uff0c\u7522\u7dda\u56e0\u800c\u505c\u7dda\u3002 <\/font><\/p>\n

<\/p>\n<\/blockquote>\n

4. Defect Analysis<\/b>\uff08\u4e0d\u826f\u539f\u56e0\u5206\u6790\uff09:<\/b><\/font><\/p>\n

\n

4.1 Data collection<\/b>\uff08\u8cc7\u6599\u6536\u96c6\uff09<\/b><\/font><\/font><\/p>\n

The defect mode analysis show 1) IPP RAM test fail, 2) Swiping card fail, and 3) Display fail are top three defect issues.<\/font><\/p>\n

\u6839\u64da\u4fee\u7406\u5831\u8868\uff0c\u5206\u6790\u73fe\u6cc1\u8cc7\u6599\u5f8c\uff0c\u5176\u4e0d\u826f\u73fe\u8c61\u7684\u524d\u4e09\u540d\u5206\u5225\u70ba\uff08\u7576\u521d\u9019\u5f35\u67cf\u62c9\u5716<\/a>\u5716\u8868\u505a\u5f97\u4e0d\u6f02\u4eae\u554a\uff01\uff09\uff1a<\/font>
1) \u8a18\u61b6\u9ad4\u6e2c\u8a66\u4e0d\u826f(IPP RAM test fail) \uff0c\u670958%\u3002<\/font>
2) \u5237\u5361\u4e0d\u826f(swiping card fail)\uff0c\u670921%\u3002<\/font>
3) \u87a2\u5e55\u986f\u793a\u4e0d\u826f(Display test fail) \uff0c\u67099%\u3002<\/font><\/font><\/p>\n

<\/font><\/font><\/p>\n

<\/font> <\/p>\n

4.2 Defect Symptom Analysis<\/b>\uff08\u4e0d\u826f\u539f\u56e0\u5206\u6790\uff09<\/b><\/font><\/font><\/p>\n

<\/font> <\/p>\n

As analysis and find almost the IPP RAM test fail units can be fixed by following step:
1\uff09Disassemble top and bottom case screw.
2\uff09Lift IPP Assembly frame parts then put it back to original position without any rework or replacement.
3\uff09Re-screw up top and bottom case.
Reviewed the structure of Tranz1230 design. There are two zebra stripes inside the IPP Assembly that locates between both Display and System board as security junction. If the zebra disconnects between Display and System boards then unit will get IPP RAM test fail<\/b>. So, we do focus on why these zebra stripes will contact fail between Display or System boards<\/b>.<\/font><\/p>\n

\u7d93\u904e\u5206\u6790\u4e4b\u5f8c\u767c\u73fe\uff0c\u767c\u73fe\u5e7e\u4e4e\u6240\u6709\u7684\u8a18\u61b6\u9ad4\u6e2c\u8a66\u4e0d\u826f(IPP RAM test fail)\u73fe\u8c61\u90fd\u53ef\u4ee5\u7d93\u7531\u4e0b\u5217\u7684\u6b65\u9a5f\u4fee\u7406\u6062\u5fa9\uff1a
1. \u62c6\u958b\u7522\u54c1\u4e0a\u4e0b\u5916\u6bbc\u7684\u87ba\u7d72\u3002
2. \u628a\u5b89\u5168\u6846\u7d44\u4ef6(IPP Assembly frame parts)\u62ac\u8d77\uff0c\u7136\u5f8c\u4e0d\u505a\u4efb\u4f55\u52d5\u4f5c\u518d\u91cd\u65b0\u653e\u7f6e\u56de\u539f\u4f86\u4f4d\u7f6e\u3002
3. \u91cd\u65b0\u9396\u4e0a\u87ba\u7d72\u3002<\/font><\/p>\n

\u7d93\u904e\u91cd\u65b0\u6aa2\u8996\u6574\u500bTranz1230\u7522\u54c1\u7684\u7d44\u88dd\u7d50\u69cb\u5f8c\uff0c\u767c\u73fe\u9019\u500b\u5b89\u5168\u6846\u7d44\u4ef6\u4f7f\u7528\u5169\u500b\u77fd\u81a0\u5c0e\u96fb\u689d(zebra strip rubber)<\/a>\u4f86\u7576\u4f5c\u986f\u793a\u96fb\u8def\u677f\u8207\u7cfb\u7d71\u96fb\u8def\u677f\u4e4b\u9593\u7684\u96fb\u6c23\u8a0a\u865f\u9023\u63a5\u88dd\u7f6e\u53ef\u80fd\u6709\u554f\u984c\uff0c\u5982\u679c\u9019\u5169\u500b\u77fd\u81a0\u5c0e\u96fb\u689d\u7684\u5b89\u88dd\u6709\u554f\u984c\u6216\u662f\u63a5\u89f8\u4e0d\u826f\uff0c\u5c31\u6703\u767c\u751f\u8a18\u61b6\u9ad4\u6e2c\u8a66\u4e0d\u826f\u7684\u73fe\u8c61\u3002<\/font><\/p>\n

\u53e6\u5916\u6211\u5011\u4e5f\u767c\u73fe\u9019\u5169\u500b\u77fd\u81a0\u5c0e\u96fb\u689d\u5982\u679c\u6709\u63a5\u89f8\u4e0d\u826f\u6216\u662f\u963b\u6297\u904e\u5927\uff0c\u4e5f\u6703\u9023\u5e36\u7684\u5f15\u8d77\u5237\u5361\u4e0d\u826f(swiping card fail)\u53ca\u87a2\u5e55\u986f\u793a\u4e0d\u826f(Display test fail)\u7b49\u73fe\u8c61\u3002   <\/font><\/p>\n<\/blockquote>\n

<\/font><\/p>\n

\n

According to above fish bone diagram, we highlighted four potential causes as action items. <\/font><\/p>\n