Author Topic: Samsung LE32B350F No backlights & Flashing LED  (Read 10421 times)

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Davy

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Samsung LE32B350F No backlights & Flashing LED
« on: March 08, 2021,16:43:45 »
Have Samsung LE32B350F telly with no backlights and flashing LED.... Ok could be the CCFL's I know.

All voltages are up and running except the 'fault detect pin' at pin 14,  am I right in thinking this should be 5 Volts when running, from standby it rises from about  0.01V to only 0.1V or so - should it not kick up to 5V then trip and the die down othewise the CCFL's are never going to ignite?

Strange thing is that I was told it made a funny noise as it tried to switch on - the only noise I could hear was the Samsung chime. I'm wondering if this funny noise could be the inverter transformers 'singing'... or the CCFL's arcing - seen that a time or two where the tubes crack at the ends and then arc away.

The power supply also carry's the inverter and make's it harder get at the tubes as the board slides into the tube's HV connectors.... knocking on a bit I suppose so could well be the tubes but 5V don't seem to kick up on the fault detect pin.

Dave
« Last Edit: March 08, 2021,16:45:50 by Davy »

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