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The driver IC Model L6279 V2.4, and L6279 V2.0 generic, but many service personnel have not seen L6279 V2.0. Driver chip is small, but designed to be relatively stable, Asus Eee PC 1000h battery the driver chips generally does not appear so serious like Philips burned. The next small element bad burn out is to bear the brunt of the next transistor. It bad if, at the same time will produce other components with burned out so directly put on the go will be burned. It bad situation, the element will be bad: inductance, 8V power supply IC, driver 470 is also possible, but less. Slight burn out straight pull put on the family to stay with a good, serious burns it is to test circuit. Not bad, If it still does not work, it may be broken PCB board. Fireball CR / EX / EL circuit board repair The fireball CR / EX hard board using the drive chip model for AN8427FBP. TDA5147BH ST / SE AN8426FBP, TDA5247CH driver chips, not substitution. AN8427FBP, TDA5147BH have the characteristics of high temperature and high pressure, the chip is relatively stable, not easy to burn out under normal circumstances, but the board's main chip turned out to be the most easily broken components. Disc using a long time after the temperature rises, Asus a7v battery the main chip the easier phenomenon of an internal short circuit occurs, resulting in the 3.3V operating voltage re-load, the working voltage is unstable. Can also cause serious damage to the head control chip and cache CR board 3.3V supply pipe also burned out. CR / EX / EL circuit board working voltage: 12V, 5V, 8V, 3.3V. Common problems: : Indicator light, the main chip is broken. : Bright lights, the driver chip is bad or broken main chip : Bright lights, five under, caching poor contact or broken, the main chip poor contact or broken : Light Saturday, head control chip is broken or 8V voltage operating voltage. : LED is not lit, operating voltage is not normal, the main chip is bad, bad crystal driver chips bad. ***** Foot of the main chip is fine, welding high welding technique and patience ** : Improper welding poor contact, Asus a9rp battery as well as the feet need a soldering iron plus welding, blowing hot air gun can also be used again. But it is best to blow chips, pine fragrance first plus, or rosin cream, this will enhance the effect of welding.
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