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lcd invertor boards

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norman:
Hi Michelle, I never considered all the transformers being faulty, I try to compare readings between them. I have used your company for PSU repair kits and had very fast service from you. I will bear that in mind if I need any transformers. Thanks Norman. :ciao:

tv tony:
has anyone considered ringing the transformers as we used to do on old valved line output stages, anyone remember valves? i built an oscillator using a couple of 555's at about 15khz, its never let me down. the freqeuncy is not over critical. if anyone requires a circuit i will willingly post it on here, the existing 24v is supplied to the inverter and the device is fed to the gates of each fet involved, this method of ringing the transformer is reliable and also tells you if the protection has operated, or if the lamp is faulty, thanks for reading, tony walker

norman:
Hi Tony, thanks for the reply, I use a lopt tester as described in the television magazine a few years ago. It checks for shorted turns etc. I think the test frequency was about 100 khz. I would be intersted in seeing a cicuit for your version. Thanks again for the input. Norman:brinda:

BC109:
I'd be interested in any test methods and/or CCT for LCD back light inverters & lamps. As Michelle says transformers seem to fault, which I general measure resistance or impedance across coils.

u s perera:
even if you fault find spars  are not avalable try www.dlec.co.uk tel no 01634 686 900 for slavaged and new a indipendent co

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