Question about Panasonic Televison & Video

Open Question

I have panasonic television model TC-21FG10P there is an output voltage in horizontal output but hold down appears i suddenly replace the vertical but it is still the same hold down again

Posted by on

Ad

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
  • 178 Answers

SOURCE: 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.

Posted on Oct 10, 2009

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My panasonic tv TC-21SF4 has no picture with sound, what is the parts should i replace, i replace the vertical ic.


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. 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/
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

Nov 08, 2015 | Panasonic Televison & Video

1 Answer

UndefinedI've checked a Panasonic crt color tv model TC-21fj20p, and I find a hard way to discover the cause of the problem until now.. The set has a good primary voltage supply. No problem with the IC...


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. 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/
Any short circuit at the horizontal output section circuit will shut down all the secondary SMPS voltages, as there is short circuit protection circuit to all Sony TVs.

Oct 28, 2014 | Televison & Video

1 Answer

Why I have a thin line across the screen in my TV model Panasonic TC 21. After replacing the vertical IC the horizontal line across the screen reduced to few inches and not as it was earlier. vertica


First, You should to replace by original part, then you should check the voltages on power supply, and check the voltage for vertical IC based on datasheet, also check the voltages on vertical section including yoke and last you should check the ESR capacitors on vertical section.

Oct 13, 2014 | Panasonic TC-21PM10RQ 21" TV

1 Answer

My tv will power on but have no raster its completely black. B+ plus voltage with respect to ground is 110 volts dc.


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
Do a search by type in the brand name of your device at its search box.

Jun 08, 2014 | Panasonic Televison & Video

1 Answer

Circuit diagram TC-29P20B


Vertical scan output section circuit fault. Horizontal line problem. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

Apr 29, 2014 | Panasonic TC-29P22R 29" TV

1 Answer

No horizontal and vertical deflection available:- audio OK


Check its horizontal output stage circuit. Replace damaged component/s. Vertical output stage gets its working voltage from the horizontal output transformer. If you want to get vertical deflection, this transformer, otherwise known as {LOT] should work to produce the supply voltage to vertical output stage.

Oct 12, 2012 | Panasonic CT-2789VYD 27 inch 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

2 Answers

Picture on TV ''squeezed'' to center of screen horizontally


Check the horizontal trafo output voltage,the capacitors and the power supply voltage (135-155V dif.the tube diameter).

Aug 14, 2009 | Panasonic Televison & Video

1 Answer

Panasonic CT-36G24A Horazontal Hold


  • your problem is in the vertical output section as you have already mentioned that compressed down to 3 inch
  • if is is some times then you will have to check
  • loose contact in electrolytic capacitor in vertical output section
  •  it will be dry or some print cut must be there.you solder it.
  • it is best thing to replace all electrolytic capacitors in vertical output stage.they are hardly two or three.
  • it is a common failure,& not a major problem.
  • as per location of the suspect is concern it in the section from where the wires are going to crt neck.
  • hope this will help
  • good luck

Oct 18, 2007 | Televison & Video

1 Answer

Wavy horizontal picture


the vertical IC outpt needs to be replace

Dec 29, 2006 | Panasonic PT-53WX42 53" Rear Projection...

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

43 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Televison & Video Experts

 Grubhead
Grubhead

Level 3 Expert

5699 Answers

Demonic-2011
Demonic-2011

Level 3 Expert

512 Answers

The Knight
The Knight

Level 3 Expert

76140 Answers

Are you a Panasonic Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...