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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Samsung 204T syncmaster problem -- not bad caps
Sorry for my english and my low preparation, but u have checked the voltages on psu output,
before and after the blak screen? So u can find which board is the problem, it sounds to me like a problem with the supply of the converter bd or mostly the lcd panel, find the lcd conn. pinout and check if before and after the blackout there is the tipical voltage (5v..?) Bye. |
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Samsung 204T syncmaster problem -- not bad caps
On May 11, 8:20*pm, "Dav.p." wrote:
Sorry for my english and my low preparation, but u have checked the voltages on psu output, before and after the blak screen? So u can find which board is the problem, it sounds to me like a problem with the supply of the converter bd or mostly the lcd panel, find the lcd conn. pinout and check if before and after the blackout there is the tipical voltage (5v..?) Bye I'm getting a good clean 13v from the power board and the regulators on the converter board measure good as well. 5v, 3.3v, 2.5v. The power good signal from the LM393 on board is in the correct state. I'm now focusing on the column driver driver board as I seem to recall that LCDs in general require +/- volts to make the pixels go on and off. There is some regulator circuitry up there I've yet to explore. al |
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