Technical defects: SHARP LED display there are fire hazards

The reason lies in the bottom of the rubber pad,

There is a fire hazard LED display SHARP will be the presence of a fire which produced a LED display and some products provide free repair of smoke hazard. The cause of the hidden danger is that the chlorine and sulfur from the rubber pad on the LED floor are easy to corrode the electrode of the capacitor. If the current passes through a capacitor that causes a short circuit due to corrosion, it will smoke and fire. Free repair products include "NV-P6000S", "NV-P6000D", "NV-P600NS" and "NV-P600ND", a total of 1235 units. These products are produced from May 1999 to June 2003. The first fault report appeared in December 2002. Since then, there were 4 cases of failure report at the end of May 2005, and the fire accident occurred. However, it was just burned out the screen, did not affect the surrounding. After receiving the report of the fire accident SHARP failed to reproduce the experiment. It was found that the cause of the fire was the black rubber pad (chloroprene rubber) on the base of the LED to improve the contrast. It is estimated that at the same time, the rubber pad is precipitated with chlorine and sulfur, and the electrode which is arranged between the rubber pad and the bottom plate is corroded. Although the device is equipped with over-current protection circuit, but in fact, even if the current value of the protective circuit within the allowable range of fire, smoke, which is one of the reasons for the failure. SHARP will take two measures to recover the screen. One is to replace the rubber pad, switch to non chlorine and sulfur polycarbonate pad. Two, in addition to the original over-current protection circuit, will also be added to allow a smaller range of fuses. In addition to the corresponding products, although SHARP and other devices have also used neoprene pad, but because there is no capacitor between the rubber pad and the bottom plate, so the company does not think there will be any problems. Because the floor rubber lead parts failure case, after the antenna assembly of Tokyo electric power has occurred.