Hi guys. I Have one fisher 250 TX, in excellent condition. I replaced all electrolytic caps from power supply. I replaced too one diode and one resistor. Now, the receiver power on. Phono and aux inputs is normal. FM and Am inputs isn't function perfectly, with a noise. The tune - o - matic function perfectly. When TURN ON (aux, phono or tuner) the receiver, 5 seconds after this, the transistor (TR1001- with circular heatsink) from power supply over heating... too much hot.... Thank you a lot if you can help me.