Repeated debugging if coil T127, T131 (tf1445) fault does not change, using a pair of induction coil in the normal debugging good machine, replacing the T127, 131, no change in the fault is still, measured in integrated circuit block n101 (ta7680) the pin voltage is normal, containing components are intact relevant if part of the resistance put AGC, adjusting potentiometer rp117 is invalid, rogue had to find a Changhong c1462 circuit diagram control, found marked c1462 ta7680 machine 16, 19 foot outside the capacitor c126, the capacity of C130 are 2p (2P), 12p (2P, brackets for the c2165 value), and the capacitance the replacement for the 15p, and the capacitance C130 (2P) was changed to 10p, re search, H segment lock all television programs. Repair the fault for almost a whole afternoon.MnXservice manual download site