Samsung 02 Precaution free download

File name 02_Precaution.pdf

1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings 1. For continued safety, do not attempt to modify the (READING SHOULD circuit board. NOT BE ABOVE 0.5mA) 2. Disconnect the AC power and DC Power Jack before servicing. DEVICE LEAKAGE CURRENT UNDER TESTER 1-1-2 Servicing the LCD TV TEST TEST ALL EXPOSED METAL 1. When servicing the LCD TV Disconnect the AC line SURFACES cord from the AC outlet. 2-WIRE CORD 2. It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this meter periodically. ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED) EARTH 1-1-3 Fire and Shock Hazard GROUND Before returning the LCD TV to the user, perform the Figure 1-1. Leakage Current Test Circuit following safety checks: 1. Inspect each lead dress to make certain that the 4. With the unit completely reassembled, plug the AC leads are not pinched or that hardware is not line cord directly into a 120V AC outlet. With the lodged between the chassis and other metal parts in unit's AC switch first in the ON position and then the LCD TV. OFF, measure the current between a known earth 2. Inspect all protective devices such as nonmetallic ground (metal water pipe, conduit, etc.) and all control knobs, insulating materials, cabinet backs, exposed metal parts, including: metal cabinets, adjustment and compartment covers or shields,