TC reported DIR remained lit when all train doors were proven closed. TC operated ADBS to no avail. TC opened and closed train doors for 6 times to clear fault.Fault recurred at ORC1. As advised by MOC(RS). pax were dis  ~~~~~ #1504 A4 door not proven close with DIR illuminated. Fault able to simulate in depot. Isolated L.H.S. & R.H.S. door from manifold, both rollers able to function without obstruction. Found door assembly alignment out, causing high resistance during door operation. RSW assisted to re-align door assembly. Adjusted door opening & closing speed ok. 10-20mm test. 10mm test fail. Adjusted door limit s/w plunger. Carried out door cyclic & function test ok. #1504 saloon door assembly-Old s/n: 100243. New s/n: 110212. Not: 2127470 raised. Done by Kumar/Jack/Sateesh/Koh. 31/01/20.