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Defective power supply of panasonic tc-21fx20r

Defective regulator str w6754

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Posted on Jan 02, 2017

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SOURCE: Panasonic television power supply problem

no picrure and filamen got light

Posted on Oct 25, 2012

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1 Answer

LG tv str w6754 glows and short. power supply is not working?


Replace that STR. Before replacing, check all the related component/s at the SMPS section [HOT] side. any one damaged component will make the replaced STR to fail. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
SMPS Circuit diagrams [STRW6754] of many popular brand TVs and other devices are given.
Search the site by type in the "BRAND NAME" or the STR number; of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Sep 04, 2016 | LG Televison & Video

1 Answer

How to fix Panasonic TC-P60S30 after electrical storm messed it up, no click, no nothing?


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Nov 05, 2015 | Panasonic Televison & Video

1 Answer

I have a Panasonic LCD tv, model# TC-32LX70, S/N MY71420839, manufactured May 2007. The tv wouldn't turn on unless the power cord was unplugged and plugged back in for about 2 years. Then it


Fault with the main power supply regulator section circuit board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Oct 20, 2014 | Televison & Video

1 Answer

I have a tc-p55st50 panasonic television that will not power on.


Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time; especially to Plasma TVs.

Sep 24, 2014 | Panasonic Televison & Video

1 Answer

Won't turn on


Fault with the main power supply regulator board.
Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

Aug 06, 2014 | Panasonic TC P42S1 42 in. Plasma HDTV

1 Answer

No power supply regulating and str no x6757


The STR or voltage regulator is probably bad. If you are not familiar with soldering and using a multi meter for troubleshooting then I suggest buying another power supply they are not too expensive. Try e-bay. Good luck

Mar 23, 2014 | Computers & Internet

1 Answer

I have a panasonic tv model 21fx20- shut off after few minutes


Request the schematic diagram directly from Panasonic.

Jun 19, 2017 | Panasonic Televison & Video

1 Answer

When we will give the power to TV, fuse & R502 location resistor burn.


damage can be ascertained from the power regulator, you can check the transistor / STR power regulator, and Diode Bridge (AC-DC), check the Positive and Negative on Elco 220/450 volt power regulator, is there a short circuit? if no, probably from before entering the diode, it can be from thermistor. Hopefully help

Oct 20, 2010 | Panasonic TC-2119R 21" TV

3 Answers

Pictures shrinks.. Panasonic TC-20LM Television


Shrinking picture is a voltage regulation problem in the switch mode power supply, Possibly a cap used in the feedback circuit. Or an over current condition on the B+. This is a very tech intense repair because there is no magic bullet. If it is shrinking on bright scenes then you can bet it is a regulation problem, bright scenes draw more current from the power supply causing this effect. I would not suspect the horiz output because the regulation for this circuit usually comes from the main switch mode power supply. One diagnostic is to monitor the B+ going to the horizontal output and see if it fluctuates. If so you can bet it is a cap or optical coupler in the switch mode circuit.

Oct 10, 2009 | Panasonic Televison & Video

1 Answer

I have purchased panasonic TV model number TC-21K400W at 2002 in Chennai, India. now hte power supply STR was burned and the number is not able to find out


I also faced similar problem with the TV board. I got it fixed by replacing the TV kit with some other manufacturer kit. Nowadays Panasonic does not make CRT based televeisions hence there is no possibility of finding nearest matching TV kit.

Aug 11, 2009 | Televison & Video

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