Good day sir,...I repair the LCD monitor of injection molding machine. PLANAR ( EL640.400-CB1) is the model number, i replace all deffective capacitors, its working but after few minute, the monitor suddenly "off" and "on" until it was totally black. the regulator ic was also very hot. Pls.. what is the main reason why its happen?
May I ask if you verify that all the caps are installed back in with correct polarity, caps are 105C and LOW ESR (a must). How hot does the inverter transformer driver Transistors/IC get, or just the MOSFET for the switching tranformer driver is getting hot. The IC/Transistor will egt hot if it is not running at the correct frequency as designed. I could not find any free servie manual for this model, perhaps you can provide the model and th number from the board it self so I can try looking up the sch. for it. Pictures will help, [email protected]
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
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