Question about Akai LCT2701TD Television

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AKAI 27" LCD Power Supply - Replacing capacitors and diodes

Hi Bill,

This is in reference to the thread about the AKAI power supply:
http://www.fixya.com/support/t278524-lcd_television

First of all, thank you for the tips and hints! Second, I was wondering what you thought about replacing the bad capacitors with 35v 1000microF capacitors? Is that increasing the voltage too much overboard from the 16v originals?

Also, do you have any hints on getting the z3 zener diode out? It looks like it's under what looks like a heatsink - do I need to desolder the whole heatsink first?

Finally, is there anything else you can think of that can be causing the TV to fail to turn on. Mine just has the red light blinking, and I'm hoping that it will work after I replace the capacitors and diode, but in case it doesn't, I was wondering if you have any other words of wisdom. :-D

Thanks again!

Kris

Posted by on

  • mrkrypto13 Jan 14, 2009

    Bill,

    Thanks for the response. I did replace the three capacitors 18, 19, and 20 and even the zener diode z3, and the TV still doesn't power up - the red light keeps blinking as before. No other capacitors are bulging out.

    I'm not sure what to do next - I already invested the time in trying to fix it myself, and I would hate to give up now, but my lack of success has given me more doubt whether the TV will ever work again. I would hate to spend $70-$100 on a replacement power supply and have it not work. Is there anything else I could do to find the root of the problem? I have a multimeter, and I tried testing some other capacitors and resistors, but have been getting inconsistent readings.

    If you have any other possible hints, please send them my way. Thanks.

    Kris

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Kris,
You can always replace a lower voltage cap with a higher voltage just don't change the rating... In fact you could replace the 16v cap with a 400v cap if it would physically fit.
As far as replacing a zener under the heat sink, yes you'll probably have to remove the heat sink itself if it's blocking. And as for any words of wisdom - if your repair is unsuccessful try replacing the module. Shop Jimmy usually has them used if you don't want to spend full bore and order a new one.
Good Luck!
Bill

Posted on Jan 07, 2009

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