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Equipment Repairs => LCD TV forum => Topic started by: call me al on January 08, 2016,09:20:40

Title: bush 32
Post by: call me al on January 08, 2016,09:20:40

HI ALL HAVE THIS Vestel 32"model DLED32165  it has a 17ips11 power board and 17mb95s-1 main board no picture ,thought it was the led strips but there is only 27volts on the supply to the leds and it wont light up tryed a different power board but still same, any suggestions welcome   

Title: Re: bush 32
Post by: mulja on January 08, 2016,10:21:52

Hi

one of led faulty on stripe board, take screen on part and check each led by connecting 3v power supply to each led find faulty one and replace

power will be 27v with out load

Title: Re: bush 32
Post by: downunder on January 09, 2016,04:04:48

You'll also find that if you test each LED with a DMM set to "diode mode", your meter will supply enough volts to light good LEDs.

Bruce

Title: Re: bush 32
Post by: Turnip on January 09, 2016,11:54:52

Hi Bruce,

Nice one, still using the AVO 8 with 1.5 volts, must get modern but enjoy the swing of the needle as it indicates more than a DMM can in some situations.

Thanks for another needy 'Heads Up' - Will try get modern - Chris.

Title: Re: bush 32
Post by: downunder on January 09, 2016,16:33:58

Hi Chris,

No, stick with the analogue meter, m8. My DMM rarely ever comes out. I find they sometimes tell porkies. Good for some applications though, like testing LEDs.

Bruce

Title: Re: bush 32
Post by: sinclairtv on January 10, 2016,07:45:06

Surely a 30v power supply is easier, testing each individual LED means removing the cap then resticking it...and anyway Ive still not mastered removing one to replace with another. Any video available? Most strips light up with the faulty LEDs extinguished

Title: Re: bush 32
Post by: Turnip on January 10, 2016,12:21:15

Hi Sinclair,

Some folks use sharpened probes and suss each led on the string, for strings O/C

Use a P/S myself where max current limited 200 M/A where good strings are sorted and S/C leds give themselves away.

With O/C led strips, check with probes or note burn areas - Chris.

Title: Re: bush 32
Post by: call me al on January 16, 2016,07:31:58

thanks for all info got set going today knowledge is powerful stuff

Title: Re: bush 32
Post by: sinclairtv on January 17, 2016,10:17:34

So what was the fault