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Фрагмент инструкции
These defective cells can be categorized into two types; (1) Non-lighting or dark cell defect: defect in which the cell is always off (2) Non-extinguishing or bright cell defect: defect in which the cell is always on The Polaroid Display Cell Defect Specifications below define the allowed limits for display cell defects and are used as the criteria in determining whether an LCD panel is replaced. 7 or more defective pixels across the entire LCD screen Polaroid will repair (replace LCD panel) or replace the TV. 4. Before Returning This Product to the User Before returning this product to the user, always perform the following safety checks: (1) Inspect all wiring to be sure no wires are pinched between the chassis or any metal parts. (2) Inspect all protective devices for proper installation, including non-metallic controls, insulation materials, cabinet backs, compartment covers, and shields. (3) Verify that no shock hazard exists on any part of the chassis, especially any metal components including cable connection points, chassis hardware, or antennas (if equipped). Use the following procedure: a. Plug the AC cord directly into a 120 V AC outlet. b. Create a test circuit consisting of a 1.5k ohm, 10 watt resistor paralleled by a 0.15 .F capacitor. c. Using an AC voltmeter (sensitivity of 5000 ohm per volt or higher), measure the voltage drop across the test circuit between all exposed metallic parts and a known earth ground. Measurement points include antenna, metal cabinet parts, screw heads, and metal knobs or controls. Measurement points can vary slightly even between revisions of the same model, so always conduct a thorough review of the chassis to locate metal points that a user may touch. d. Any voltage reading of 0.375 Vrms AC (0.25 mArms) or higher indicates a potential shock hazard. THIS CONDITION MUST BE CORRECTED BEFORE RETURNING THE PRODUCT TO THE USER! e. Repeat the above checks with the AC polarity reversed. A non-polarized adapter is required to reverse the polarity; DO NOT LEAVE THIS ADAPTER WITH THE USER! Under normal operation the product must use the proper polarity. 5. Disassembly Procedure Note: Before disassembly of any part the TV, make sure the power is OFF, and the power cord is removed from the wall outlet. Allow time for power within all system boards to discharge before you begin disassembly. Never insert any objects into the vent holes in the TV case. Note: Before returning this product to the end user, you must follow the steps outlined in the section, Before Returning This Product to the User, on page 19. This procedure ensures that the chassis will not cause electric shock. When servicing an LCD or plasma TV, always observe the following safety guidelines: • Wear a grounding (ESD) wrist strap, and use a grounded or dissipative work mat. • Use a stable and strong work surface that is large enough to hold components you might remove. • When removing components that are attached with a cable, unplug the cable before removing the screws to avoid damaging the cable. • Use a magnetized screwdriver for removing screws. • To help keep track of screws, place each component’s screws next to the component on your work surface. ELECTROSTATIC DISCHARGE (ESD) Components inside an LCD or plasma TV are sensitive to static electricity. Before servicing the TV, follow these guidelines: • Avoid static-causi...
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