Train encountered power fault at Rear M1car while departing station. Reset - ok. Fault recurred dep arting DBG1 and SOM1, both reset ok. Staff (NEW) tripped PRC B to no avail. ~~~~~ Checked from FC 820, 821, 136 at #1560. Further check VVVF1, 2, Brake chopper, pre charging resistor ok. Found K contact tip badly worn-replaced. Conducted limited movement found #1560-T/M 2 having spark flashover. Not: 2121008 raised to RSW. Done by Henry/Kamal/Alauddin. 15/01/20.