LG 50PW450 Service Manual - Page 30

Repair Process PDP TV Symptom A. Picture Problem Vertical bar/ Horizontal Bar Making Revision 2010. 11. 16 전자 - 6-2 5/10 ☞A19 Check defect type Regular Vertical Line / Bar ☞A1 Check Module pattern by using "TILT" key on SVC R/C Normal Pattern? Y Replace Module Vertical Line/Bar Irregular Vertical Line / Bar ☞A13 N 1.Check CTRL B/D 2.Replace Board ☞A20 Check connection of Connector (COF,TCP) on CTRL B/D , X B/D Normal N ☞A13 Y 1.Check CTRL B/D 2.Replace Board 1.Connector re-connection 2.Eliminate foreign material on Connector ※CTRL B/D: Control board Normal N Picture? Y Close Check Main B/D Replace Module (If Main B/D doesn't cause) Half No picture ☞A18 1.Check X B/D 2.Replace Board Normal N Picture? Replace Module Horizontal Line/Bar ☞A20 Check connection of Connector (FFC) on Y Drive B/D Y Close Y Normal ☞A16 1. Check Y Drive B/D 2. Replace Board N 1.Connector re-connection 2.Eliminate foreign material on FFC 5 ※ H-Line's Cause is rare CTRL B/D Normal N 1.Check CTRL B/D Picture? 2.Replace Board Y Close Normal N Replace Picture? Module Y Close ⓒ LG Electronics. Inc.2010