DisciplineReportLCDnodisplayissue.docVIP

Problem Solving – 8D Report Version: 0.1 Model 2Product 2Customer 2Roberts 17NotebookRosaSubject 2Roberts 17 LCD no display issue—Sub-tier High-tec LCD cable material NG(pin 空焊)Discipline 1: Team member / External member 2Leader: FAE/Rong Lin Record Keeper: FAE/Rong Lin Team Member: FAE/ Rong Lin; SQM/Nancy Pan; QC/Betty Zou; MC/Great Chen; PC/Frank Xuan; PD/Lemon TangDiscipline 2: Describe the Problem 7Date: 2009/8/2Basic Information: Failure Symptom: LCD no displayStage: FA Function test Station Date/Time: 2009/8/2 14:35NG Q’TY: 5Failure Rate:5/985= 5076 DPPM Detail Descriptions: FA 開機顯示測試發現 5pcs LCD no display system, 分析發現 LCD cable raw material NG(pin空焊), vendor: High-tec, D/C focus on 07/10. Pin 20 Pin 35 那個站別發生？ Discipline 3: Implement and Verify Short-Term Corrective Actions 5Date: 200/8/2Containment Action PIC: WKS/ SQM/Nancy PC/Frank MC/Great Target Date:2008/8/3 WKS sorting result: 8/2 Sub-tier 集中 sorting 所有 High-tec and wistron LCD cable, 合計 8K pcs (Wistron 2k pcs and High-tec 6k pcs), NG: 0 pcs. (Failure Rate: 0/62=0%) Sorting method: vibration test and electronic test. Sorting result: Sorting the High-tec LCD cable 8k pcs 未發現NG. (Failure Rate: 0/8K=0%) FA 對Sorting后LCD cable 8k pcs組裝開機顯示測試，未發現LCD no display. (Failure Rate: 0/8K=0%) 已經上線的機台是否有sorting? 是否有risk ?Discipline 4: Define and Verify Root Causes 8Date: 2009/8/3Analysis: - Principle : Roberts 17 LCD cable raw material NG - Circuit Diagram : 並沒有詳細說明是怎麼分析出與LCD Cable有關? Possible causes : 檢查所有 LCD display相關 power and signal. 檢查 LCD cable 發現LCD 1 signal pin open.　 那根pin open ?這根訊號的作用是什麼　？ 導致LCD cable Pin 35 20 open 可能原因: 1. LCD cable con 空焊. 2. LCD cable 有異物. 3. LCD cable pin 變形. - Verification: Dispatched LCD cable 發現 LCD con pin空焊. 請提供pin空焊的放大照片. Pin 20 Pin 35 Root Cause : Wistron SQM sent NG material to High-tec High-tec分析Hot-bar頭溝槽包容線材不夠，導致線材吃錫不足，而導致空焊。 為什麼Hot-bar頭溝槽包容線材不夠 ? (還沒問到真正的Root Cause) Discip