Question about Protron PLTV3250 32 in. LCD Television

2 Answers

Protron (PLTV 3250) loss of power

Was being used only as a monitor and working fine. Next attempt to power up the unit acted as if unit had no power. Checked power from wall through cord and all was ok.

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  • jautry731 May 24, 2009

    I checked the fuse and it's fine.

  • jautry731 Jun 08, 2009

    Ok, I've replaced all capacitors on the low side of the power supply, successfully. I also inspected the entire board for "cold" solder joints, but still nothing.

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If the fuse is good it sounds like you may need to replace the capacitors in the power supply of the unit. It means the supply is likely not kick starting into oscillation. The most common cause for this is bad capacitors in the power supply.
The first capacitors to replace are the smaller ones on the primary side of the transformer they look like this typicly around 100v at about 22uF:
Protron (PLTV 3250) loss of power - 62737e9.jpg The next step is to look for any leaking capacitors and replace those, they normaly have bulged tops and have stuff leaking out of them somtimes, they look like this:
285dba1.jpg A good repairer will just replace all the electro's on the board to save a future repair.
The last step before testing your unit out is to resolder any dry/cracked solder joints they typicly look like thiProtron (PLTV 3250) loss of power - 01da546.jpgimg src="http://i.fixya.net/uploads/images/01da546.jpg" alt="01da546.jpg" class="h_mi" />
The above is a general guide for repairing a power supply in consumer electronic gear where there does not seem to be any smoked components and there is voltage getting to the main filter cap after the fuse. It's assumed that the reader has electronic background is competent in regard to safety, if this is not the case then the repairs should be carried out by a competent repairer. If you do however take on the repair I will not be held responsible for your safety it's at your own risk.
Hope this helps

Posted on May 25, 2009

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Hi, you need to change the FUSE from the plug.

Posted on May 23, 2009

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http://s807.photobucket.com/albums/yy352/budm/Protron%20PLTV%203250/

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
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http://s807.photobucket.com/albums/yy352/budm/Protron%20PLTV%203250/

http://en.wikipedia.org/wiki/Capacitor_plague

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http://s807.photobucket.com/albums/yy352/budm/Protron%20PLTV%203250/

Power supply; http://www.google.com/products?rlz=1T4GGIH_enUS282US283&q=pltv+3250+power+supply&um=1&ie=UTF-8&ei=hdgBTL6MJaKMNZLC1Ts&sa=X&oi=product_result_group&ct=title&resnum=1&ved=0CCQQrQQwAA

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http://s807.photobucket.com/albums/yy352/budm/Protron%20PLTV%203250/

Power supply: http://www.google.com/products?rlz=1T4GGIH_enUS282US283&q=pltv+3250+power+supply&um=1&ie=UTF-8&ei=9lIDTL7XO4fcM7HA-Ds&sa=X&oi=product_result_group&ct=title&resnum=1&ved=0CCgQrQQwAA

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