I have just repaired one two, used a row of ulta brite leds instead. The cap resonates with the transformer inductance and limits the tube current. george ----- Original Message ----- From: "Alexandre Souza" To: Sent: Tuesday, August 12, 2003 4:32 AM Subject: Re: [EE] LCD monitor backlight repair > > I work on LCD panels quite often and usually the inverter blows a fuse. > > Instead of modifying the inverter you would be better off changing the > CCFT. > > Digikey carries some bulbs as does BGmicro and All Electronics. > > don't get too caught up in the voltage and wattage specs. Generally you'll > > be lucky to just find > > one with the correct dimensions. > > CCFTs like most fluorescent bulbs get a dark band at one or both ends > before > > going out all together. > > I believe that they start drawing a little extra current before they die, > > which causes the blown fuse or the blinking out that you are experiencing. > > Duane, would you mind in developing more about this subject? How about a > good "example" of CCFT inverter, and some explanation about the workings? > > These things seems to be simple, but I always found hard to make these > beasties work. Why that capcacitor on the end of the circuit, on the voltage > output for the lamp??? :o) > > > --- > > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/03 > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.