Transformer problem

[alkv23]

Hi Guys im al from malaysia. I had a problem with radio/cassette transformer. The radio bought in korea now went use in malaysia it can run almost 1/2 hour. After that it will stop. Need to wait for few hours and can use back. Ok the supply in korea is 220vac and 60Hz. In malaysia is 230vac/50Hz. The output from transformer is 16ac and 9.15ac but the original write in transformer is 15ac and 8ac. Plz give some idea to solve this problem. Any modification can i do in this power supply or change the transformer? Hope u all can share with me.Thanks

 

[audioguru2]

The difference of the transformer's voltage and frequency outputs are small and it should work. You need to troubleshoot the circuit to find what overheats and stops the circuit.

 

[alkv23]

Thanks audioguru for ur reply. Now there have few ic and its really hot but how to find which make overheat and make the circuit stop? Im trying doing small repair. Plz help and give some idea on this matter. Thanks.

 

[audioguru2]

What is hot? Did you look at its ratings on its datasheet?
Something is drawing too much current. Current times voltage makes heat. What gets hot or its load is drawing too much current.