I going to replace stok radio in the Bonni. Dismantled a tape recorder and the new set. One problem came to light. At including of light, the monitor of A\С burns the same brightly! If to set an old tape recorder that the monitor of A\С at including of light works correctly. Looking over charts, found out that the brightness of monitor of A\С depended on a wire which is plugged in a tape recorder. Say how to compel to work monitor of A\С correctly without stok radio.