换机范围：15天内，非人为质量原因，保修内备件EOL，重复维修超过3次Scope of replacement: Within 15 days, due to quality issue, EOL of spare parts under warranty, with more than 3 repeated repairs
换机凭证：购机POD,保修卡，维修检测报告Replacement certificate: purchase POD, warranty card, maintenance and testing report
Replacement approval flow
BSI submission OA format, approval by service manger ,MD sir
Warehouse internal operations
OA 通过后 ，通知BSI &ASC 收集坏机及备件 保修卡返回仓库After the OA is approved, notify BSI&ASC to collect the warranty cards for faulty TV and ACCs and return them to the warehouse
service TV unit outbound, warranty card SN infroms backup(remark the replacement SN should be matcth return TV SN), SAP keeps outbound records备机出库，保修卡SN 备份，SAP做出库记录
Work Order Warranty Period
1.keep old SN and POD as warranty Poriod data
2.if service calls happen should be checking Warranty card SN ,POD In CRM system
