I am not sure what was the problem. But after inspecting and replacing the neccessary parts for the related problem machine was in the same condition. When I inspected PCU found generic OPC that customers replaced locally just to reduce his cost. And he climed that these lines start appearing after this replacement but was not sure what is the reason. I replaced new OPC B070-9510 and after replacing the OPC lines did not appear but still I am not sure what was the actual problem. Just to update my problem I am posting the details which resolve the problem.
Any comments?