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I have a china 21"crt tv based on m61266 ic.when I turn on my tv picture gets shrink horizontally but after a litte while picture strats filling the screen and makes a little bright line in the bottom

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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. 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 the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result will display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.

Posted on Jan 03, 2017

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Posted on Jan 02, 2017

snakehead
  • 1074 Answers

SOURCE: Picture is shrinking from the bottom

Hi you have lose solder in yor vertical section have a tech resolder it or that problem will cost you .hope you have already have it remedied.

Posted on Mar 23, 2007

bobjrdns
  • 84 Answers

SOURCE: 27" sharp has audio/no picture/ horizontal white line across screen?

bad vertical chip ic

Posted on Oct 19, 2008

  • 75 Answers

SOURCE: TV: bright line across black screen for several hours.

vertical problem need to check for bad solder joints on vertical ic would be helpfull if we had the model number o f yur set. also could be bad capasistors in vertical section.

Posted on Mar 09, 2009

  • 88 Answers

SOURCE: Flickering multi-colored line in the middle of the screen.

You have a failure in the vertical deflection circuit. This could be either a bad vertical chip, the power supply that runs the chip or a bad capacitor in that circuit. This is usually a repair best left to a professional. There is a small possibility that it could be bad solder connections. If genlty tapping the unit temporarily solves the issue you can try and resolder the pins on the vertical chip LA7841 is the part number. There is also a resistor 1 ohm 1 watt. If that resistor is open you can assume the IC is bad

Posted on Mar 12, 2009

  • 700 Answers

SOURCE: Picture is squeezed down to middle with a bright green horizontal

If you can do it, then just reheat or resolder the vertical ic pin for first step. If this work then no need to change the IC. Good soldering technique is needed. Do this when unit is no power and unplugged from wall socket.

Remember nasty voltages inside, it might caught you.

Posted on May 25, 2009

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1 Answer

Onida crt tv no picture ,week snow, ic m61266,tuner,swa filter replaced but no iffect. Suplay 5v,33v,sda,scl,agc ok


M61266 fault. Replace it. If you wish to get some details; check the site linked here. 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.

Jul 17, 2016 | Televison & Video

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Philips 21"tv 21PT2125 is LOT sparking and shut down.replaced LOT,main IC,crt base.any solusion pls...?


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/

Jun 13, 2015 | Philips 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 Panasonic 20inch crt tv get switch on for few seconds and shrink in to a sharp horizontal line. How to repair this?


the horizontal deflection is controled by a IC and other components on the chasis. these are somwhat tricky to fix as a new IC is expensive and doesn't always fix the deflection problem. best bet is replace the old crt technology with a modern lcd type monitor.

Apr 18, 2011 | Televison & Video

1 Answer

Picture shrinks horizontally every few seconds.


You are changing parts in the wrong circuit. The problem is in the vertical circuit. Look for the vertical IC and resolder the pins first. It should be an LA7837 or something similar. Also, check the 100ufd and 47ufd caps in the same circuit.

Keep us posted.
Dan

Jan 19, 2009 | Panasonic CT-20G11 TV

1 Answer

Samsung TV stopped displaying picture


No picture but sound can mainly be of two problems, most of the times it is caused by a faulty vertical deflection ic, you can diagnose this by slightly increasing the screen voltage by turning the screen control on the LOT, a horizontal line will appear if the vertical ic is shot, and the other problem is the CRT base, but this is less common for shot base won't go off at once, it will show picture faded in the beginning. Now another problem could be the horizontal output transistor, if the tv has a high power sound output, the sound power supply will come from smps itself instead of from LOT, check that too, to confirm this, check if the CRT filament is glowing. Good luck.

Jan 17, 2008 | Televison & Video

1 Answer

Picture broken and shrinking


You need to change your vertical IC, along with some capacitors around the vertical IC. Capacitor with value 220UF, 10uf, 470uf and finally 1000uf. Doing this will fix the set. Total cost under $40

Best regards
Circuitcity

Nov 29, 2007 | Sony FD Trinitron WEGA KV-32FS100 32" TV

1 Answer

Screen shrinks to 10 cm horizontal line


Yes, you are correct. Usually what I find in a set like that with that symptom is that the solder joints have cracked and come loose on the vertical output IC. That is the IC which drives the yoke coils that spread the picture up and down. If you have soldering experience then you can locate this IC and resolder its pins but if you have never worked on PC boards then have a qualified tech handle it for you. This is a very easy thing to repair so it should not cost too much.

Aug 06, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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