Reasons for TCC# GTO POWER SUPPLY UNDER VOLTAGE

TCC# GTO POWER SUPPLY UNDER VOLTAGE  
A.BOTH TCC LOGGED THE FAULT 

a) DEFECTIVE AUX GEN- DIODE OPEN, COUPLING CUT, LOOSE CABLE CONNECTIONS, WINDING OPEN CIRCUITED 
b) DEFECTIVE 3G2A COUPLER- LOOSE OR BURNT COUPLER 
c) DEFECTIVE 33C TB CONNECTION- WIRE CUT, LOOSE CONNECTION 
d) AUX GEN BEARKER DEFECT 
e) AUX GEN FIELD BREAKER DEFECT 
f) BATTERY CHARGING ASSEMBLY DEFECT 
g) TB 62 A DEFECT 
B.ANY ONE TCC HAD FAULT

h) C043 /c075 CARD DEFECT 
i) X PLUG – 
j) GTO PS DEFECT 
k) GTO PS CIRCUIT BREAKER DEFECT 
l) DIO CARD DEFECT