Turn on the TV and receive TV programmes to watch images and sound gradually getting worse, makes a search cannot be stored. According to overhaul experience, more for AFT circuit or radio recognition circuit occurred fault, but the machine no set radio recognition circuit and AFC perimeter circuit, but through IIC bus system mutual passed information data to completed of, caused the fault of causes, a is formed AFT and radio recognition signal of small signal processing circuit N101 (OM8839PS) occurred fault, II is microprocessor circuit P83C266BDR/117 bus control system occurred fault, Affected the AFT and recognition signals and radio transmissions. Check micro-and small-signal processing circuit is no exception, taking into account the bus signal transmission and control associated with the data inside the memory, memory fails, will also affect radio signal identification and radio store. Replace memory N602 (PCF8598-2), and after startup, search save set recovery to normal troubleshooting.