Question about Inverter Pure Sine Wave 1500w Inverter

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Inverter not switching on

I have a sucome inverter with me not switching on when power supply goes off

Sr. Engineer BEL
ministry of defence
Govt of india

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Trivedi ji namaskar
please make sure your inverter is on auto mode and then contect immidetly to your service provider for maintenance inverter becuse its microcontroller systems is not working.
hope question,s answer
thank you.

Posted on Jul 09, 2010


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Screen went black sound ok

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you will need to check weather the 24vdc supply for the inverter board is good no drop voltage. if no supply check the power supply board. then you should check if their is a inv_on signal at the power inverter board around 3v-4.4vdc . if goes out during power on tried to disconnect the supply going to the inverter board to ensure if their is a shorted parts in the inverter board. if the inverter_on signal also goes out even with out inverter board connected that was mean you have problem in the processor board.

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I have an Insignia LCD 32", is it common to only get 3 volts dc on one pin only on the power supply board (6HA0112014)? I tried a board from River Valley Electronics and got the same thing. What are...

That may be the stanby 3vdc for the main board, the main board will send out PS-ON signal when the power switch is activated which will turn on the rest of the power supply sections such as the 24vdc for the backlights inverter board and 12vd for main board, 5v for the logic circuits, etc. If the Inverter board has short cicruit, then it will cause the power supply to go into shutdown mode. You can disconnect the cable from the power supply to goes to the inverter board to see if you get the 24v, 12v to turn on.

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Tv went bang and now power goes onand off but no picture or sound

Hi I am Vortash , Most likely that your Power supply unit has shorted out possibly the bridge rectifier or possibly the SMPS drive ic's ( opto ) without looking at it directly this is almost impossible to say what it could be , even a shorted cap could blow the mains fuse and make a large bang when it goes so your best bet is to take it to an engineer .
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Samsung LN-S4051D goes on and off by itself. Repeatedly.

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2 Bad secondary power supply too the inverter circuits

Especially if its a switch mode power supply connected to twin phase inverters. This problem almost always happens under that particular engineering scheme. Switch mode power supply's are horrible at sustaining high voltage CCFL back lights.

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e-mail me if you need more info or advice....

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1 Answer


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