Can anybody please assist,the above tv was working fine,the picture dissapeared for a few seconds with sound ok then came back on for a few minutes,now the picture has dissapeared,backlights are not working,i have purchased another power supply,tcon board,inverter and logic board.I am getting exactly the same fault,if i disconnect anyone of the lamps the screen lights up for about 4 seconds.I have looked through the forum but cannot find a test procedure for a 90c221201c3 power supply.Has anybody a wiring diagram with outputs for cns2 and cns1 please or any suggestions what fault may be.
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Re: Hannspree JT01-32E2-000G Black Screen after 2 seconds
Are all the lamps lighting up? If.you have a bad one it will cause the inverter to send a return signal.to mainboard shutting down the inverters. Also check wiring that no wires are coming out of the socketsDid I leave the soldering iron on? -
Re: Hannspree JT01-32E2-000G Black Screen after 2 seconds
thanks for the info,i have tried just connecting one lamp at a time to the invertor board and it lights each one for 2 seconds approx,do all the lamps have to be connected for the invertor to work correctly,also what is the easiest way to test the output on the invertorComment
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Re: Hannspree JT01-32E2-000G Black Screen after 2 seconds
Yes that test proves ONLY that the bulb is not totally dud.
All lamps have to be connected AND work for them to stay on.
Did you test all the lamps in one socket or each in it own with the
others unplugged. ( test for totally dud transformer)
One test is to measure the resistance of the secondary windings on the innverter transformers. If you post a good clear picture of the front and back of the board
with them on we can help you with where to test.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Hannspree JT01-32E2-000G Black Screen after 2 seconds
pictures of inverter board,once again many thanks for your helpAttached FilesComment
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