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No picture in PANASONIC TC-21RX20C?

No picture, main IC problem. where can I buy IC and what is the cost?

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Posted on Jan 02, 2017

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Posted on Sep 23, 2012

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1 Answer

How to find main system memory IC of this tv????? Panasonic tc-14e1m .. this tv no sound some channels have sound not clear. . Sound system cant change only have 'I' .. cant change ...


It is a very small IC, can be located very near to the main system control IC. Its number will be 24C01A / uPD 6263. Any one might be used. It has 8 solder terminals. I'll include an image of it here for you to recognize the IC.
26299332-inyznzkntrnyui0b3a0ckkk3-4-0.jpg
If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

Oct 03, 2016 | Televison & Video

1 Answer

I have a Panasonic Plasma TV that will not turn on. If you try to turn it on the red power button lights up on the TV but there's no picture. When I try to turn the power off the TV does not respond.


You have a burned out main circuit board most likely. The best thing to do is forget the repair and just buy a new one, the cost of flat screens is less than the repair costs in many cases. If you do decide to repair it remember the rest of the parts are getting ready to fail as well.

Jun 07, 2016 | Panasonic Televison & Video

1 Answer

Panasonic tv. model no. TC-21-FJ20R the power is off the IC SRTW 7754 the 300v is still on it


Panasonic TV TC-21FJ20R is a big blunder of Panasonic Company, shame for Panasonic company to launch this type of product in a huge price.

Mar 02, 2011 | Panasonic Televison & Video

1 Answer

My Panasonic TC-21Z88RBN doesn’t displays the total picture vertically ,when the picture is display it like not in the center of the screen sum of it is disappear in the bottom


Hello

Your TVs vertical output section has the fault. You just open your TV after disconnecting it from the AC mains wall socket, and locate the vertical output section. This section uses an Ic marked as part [IC 401] on the board and its number is LA7840. Just look for any loose soderings around its components legs, and the solderings at the IC legs, which has 7 of them. The IC stated above will be screwed onto a heatsink to radiate heat out of it when it works.
If all soldering point are fine, come towards the IC legs and measure the voltages at each leg. The voltages must be
pin 1= Ground
pin 2= 12.6
pin 3= 24.7
pin 4= 4.4
pin 5= 4.4
pin 6= 24v [vcc]
pin 7= 1.8
All voltages stated above are DC voltages with respect to ground. If any of this voltage is missing, find out the reason for that. If all of them are noted abnormal, IC may be defective, and replace it.
[vcc] stands for main input voltage to the IC.
If you need any more assistance, feel free to contact me through Fixya. Ok.

Dec 07, 2010 | Panasonic TC-21Z88R 21" TV

1 Answer

I have tv, the picture in not ok. i think the supply voltage is not good especially when i turn to other channels. the picture is just like moving or turn the side of the tv adjust about a centimeter and...


Hello
Your Tv has verical shift problem. It is not the supply problem. It can be got repaired. Sometimes it may be the fault of chroma Ic. In panasonic telivision the chroma section has an ic and it is surface mounted. We will call as SMDs. An SMD replacement needs special tools, which a normal sevice mechanic can't afford. So it is best for you to contact the authorised sevice center of Panasonic nearby.

Oct 18, 2010 | Panasonic TC-21S80RQ 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

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