LG 60LB5900 Service Manual

LG 60LB5900 Service Manual

Read the safety precautions in the LG 60LB5900 Service Manual before servicing the TV. An isolation transformer must always be used during the service of a receiver whose chassis is not isolated from the AC power line. Use a suitable power transformer, since it protects the technician of accidents resulting in personal injury from electric shock. Also, it will protect the receiver already its components from being damaged by accidental shorting of circuits that can be inadvertently introduced during service operation. If it has blown a fuse (or fuse resistance) on this TV, replace it with the specified. When replacing a high voltage (oxidize Metal Film Resistor, 1 W) resistance, keep the resistance to 10 mm of the PCB. Keep cables away from high voltage or high-temperature parts. Always perform a verification of AC leakage current on the exposed metal parts of the Cabinet, such as antennas, terminals, etc., to make sure that the set is safe to operate without damaging the electric shock.

With the AC plug of the instrument removed from the AC power source, connect a power bridge across the two prongs of the AC plug. Place the AC switch in the on position, connect ohmmeter wire AC plug prong United and touch other ohmmeter lead in turn to each of the exposed metal parts such as Terminal of an antenna, phone, etc. Metal part has a history of returning to the chassis, the measured resistance should be between 1 Mȍ and 5.2 Mȍ. When the exposed metal has no path of return to the chassis, the reading should be infinite. There is another anomaly that must be corrected until the receiver is returned to the client. Connect a resistor of 1.5 K / 10 Watts in parallel with a capacitor in 0.15 uF between a good known Earth (Water Pipe, Conduit, etc.) and exposed metal parts. Measure the AC voltage across the resistance using an AC voltmeter with 1000 ohms/volts or more sensitivity. Plug the AC cord back into the AC outlet and repeat the measurements of AC voltage to each exposed metal part. Any measured voltage must not exceed 0.75 volts RMS which corresponds to 0.5 mA. Where any measurement is outside the specified limits, the possibility of risk of electric shock and the set must be checked and repaired before being returned to the client.

The application this specification. Sheet applies to LA43B / M chassis applied LED TV all the models manufactured in the factory of TV because is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of the isolation transformer will help to protect the test instrument. The setting must be in the correct order. The adjustment will be made in the event that there is a temperature of 25 ± 5 oC and 65 ± 10% relative humidity if there is a specific designation. The input voltage of the receiver must be kept 100 ~ 240V, 50 / 60 Hz. At first, the operator must turn on SET using the key Power Only. The receiver should be powered for approximately 5 minutes before adjusting when the module is in the circumstances of more than 15 oC. In case of maintenance of the module is in the case of 0 ° C, it must be placed in the case of more than 15 ° C for 2 hours in the case of a maintenance of the module is below - 20 ° C conditions, must be placed in the circumstance of more than 15 ° C for 3 hours.

Download USB S / W (optional, only service). Place the USB stick into the socket USB. Automatic detection of the update file to USB Stick - if the version of the program downloaded on USB Stick is less than that of the TV, did not work. Otherwise, the USB data are detected automatically. Displays the message "Copy memory". Update completed, the TV will automatically restart. If the TV is on, check the updated version and the tool option. If the download version is higher than that of your TV, television may lose all the data channel. In this case, you must retrieve the channel. If all data channel is deleted, a DTV test was not performed / ATV in the production line.

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