LG 50PW450 Service Manual - Page 28
Mal-discharge/Noise/dark picture
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Repair Process PDP TV Symptom Check Picture problem Type ☞A14 Mal-discharge Dot type Scan Type A. Picture Problem Mal-discharge/Noise/dark picture ☞A15 Check CTRL ROM Ver. and Rom Upgrade Normal N Picture? Y Close ☞A5 Check voltage . -VY / VSC (Y-Sus B/D) Normal Picture? N Replace Y-Sus B/D ☞A16 Check Y Y Drive B/D & Replace B/D Making Revision 2010. 11. 16 전자 - 6-2 3/10 Replace Control board Normal N Picture? Y Close Normal Picture? Y Close ☞A13 N 1.Check Control B/D 2.Replace Board Replace Module N Normal Picture? Y Close Picture Noise Check RF Cable Connection Dark Picture Check Picture mode setting Normal Picture? ☞A6-1, 2 N Check Tuner & Replace Y Close Normal Picture? ☞A9 N 1. Check Z-Sus Board 2. Replace Board Y Close 3 Normal N Picture? Y Close Replace Module ⓒ LG Electronics. Inc.2010