LG LG NB2420A AFN75734048 free download

File name LG_NB2420A_AFN75734048.pdf

Internal Use Only Website http://biz.lgservice.com SERVICE MANUAL 160W Sound Bar System MODEL: NB2420A SERVICE MANUAL MODEL: NB2420A CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. P/NO : AFN75734048 FEBRUARY, 2012 CONTENTS SECTION 1 ... GENERAL SECTION 2 ... CABINET & MAIN CHASSIS SECTION 3 ... ELECTRICAL SECTION 4 ... REPLACEMENT PARTS LIST 1-1 SECTION 1 GENERAL CONTENTS ESD PRECAUTIONS ... 1-3 MICOM HIDDEN KEY MODE ... 1-4 UPDATE PROGRAM ... 1-5 SERVICE INFORMATION FOR EEPROM ... 1-5 SPECIFICATIONS ... 1-6 1-2 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembl