Hi, I have an old radio cassette cd Sony CFD-G50L, buyed in Argentina, but the AM interval is set at 9 khz, apparently non capable of set. The manual says the same, 9 khz, total range 531-1602 khz, but here is used the 10 khz interval. Anyone knows some combination of keys to pres/hold ? to set the radio to 10 khz? Thanks in advance!