Jensen JCR-425 Clock Radio "change 220v 120v" Questions

change it 220V p need to now transformer output voltage My self sushil from india pl.find the detailsyellow-blue is 3.2 VACred-white is 4.2 VAC.Clock is well functioning without frequencies difference

...220v convertor in India found the clock looses 5 secs for every min. Tried replacing 110volt input transformer with different 230v input transformer found no change. Tried rewinding the primary side ...