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SONY KDLW40A12U NOISEY FAN

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kennyc:
Hi Guys ,have got a 40inch Sony that has a cooling fan in it that is making a noise . Have taken the fan out and cleaned the dust out of it but it still makes a noise . Simple I thought just disconnect fan . Nope, must be a protection circuit that detects the fan has stopped and turns the TV of after 30 seconds . Any ideas or do I just have to get a fan which is over £100 at CHS. Thanks

Turnip:
Hi Kennyc,

Usually with a fan, just remove the disc covering the bearing and oil it -

Works a treat with most computers - Chris.

downunder:

Hi Kenny,

If the fan uses 3 wires, one is a feedback to the microprocessor. Some TVs are rather particular about the fan that is used and will not accept generics.

Try what Chris suggests. I usually use a spray can of lubricant that has an an extension tube that fits into the nozzle. You'll find a gap between the fan blades and the motor section. Give it a good squirt into the gap and try it.

It'll sort a sluggish fan but may not fix a fan that is knocking. Short the yellow and black leads and see if the fan continues to operate without tripping the TV. If so, you may get away with a generic fan by doing the same to it. Protection will be gone though.

Bruce

kennyc:
Thanks for your ideas. Will try to oil the motor . Dont want to start shorting the wires out in case the TV goes off totally and customer complains it was working before I started working on it. You know the usual story

cheeky2:
If i recall i had one of these a while back someone had left a pencil stuck in the fan! I noticed that the fan was 12V with a yellow wire which sends the signal back to the mainboard. I would suggest if the oil doesn't sort it out try a PC fan which may do the job and substantially cheaper at around £10. If you have one of them around give it a whirl check the voltage coming out from the yellow wire and compare with a PC unit fan.
 Good Luck :)

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