Question about Sanyo AVM-3259S TV

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Avm 3259 picture problem

I have a sanyo avm3259 that i am trying to fix i was told it might be the vertical deflection ic or its supply resistor i have changed the ic (la7841) but i dont know the resistor number to change can anyone help

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Vcc is on Pin 6 of the vert. output IC so you can trace that back to it's feed resistor (not sure the location number but you can find it easily by following the circuit trace). Depending on what your problem is you may need to replace some electrolytic capacitors as well. Follow pin 7(pump up) back to it's electrolytic cap. and look for swelling or bulging. Look for other bulged capacitors in the vertical section. You may also identify a bad resistor by a discolored look but not always, if in doubt meter it.
Let me know if you need some more info.

Posted on Oct 06, 2008

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Horizontal line


Basing on your post : Horizontal line ,

check vertical deflection circuits

( includes IC, capacitors , resistors % foil paths ) , up to the yoke.


Could be just a cold solder joints on Vertical IC, open resistor,

leaky capacitor or both




Have voltage :


On most the supply line of vertical IC is +24V

Aug 14, 2012 | Standard (CRT) Televisions

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Picture go into a thin line.


You have a thin horizontal line in the center of the TV. You, in this case have vertical IC that has bad grounds. Resolder the vertical IC pins and check the capacitors in the immediate area and replace these caps as necessary. If you still have a horizontal line, you will have to replace the vertical IC. Find a TV tech or someone with electronic experience to do this for you. Should be reasonable to fix. Thanks for asking and Good Luck!

May 30, 2010 | Sanyo AVM-3659S 36" TV

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Sanyo TV Model DS25500. Replaced fuse, but now it has a line across the screen? Does the picture tube need to be replaced?


Your picture tube is fine for now, but it won't be if that line is allowed to burn into the screen. You have lost your vertical deflection. Since a fuse was involved, that indicates that an overcurrent condition existed. You may have a blown vertical deflection IC, or there could be just a shorted diode, which caused the overcurrent, and subsequently burned a resistor in series with the diode, also acting as a fuse. It could be all three.

Apr 05, 2010 | Sanyo Standard (CRT) Televisions

1 Answer

We have perfect sound but only a thin horizontal line in the middle of the screen.


this is a capacitor that has gone bad in the vertical delfection stage of the tv. it is an very easy and cheap fix if you know someone who knows how to solder and replace electronic components. If not then you'll just have to get another tv as taking it into a tv repair shop is not worth the cost. You could get another tv for what they will charge you to repair it,

May 31, 2009 | Sanyo AVM-3659S 36" TV

1 Answer

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

Oct 26, 2008 | Sanyo DS27800 27" TV

1 Answer

Sanyo ds24205


I don't have any specific information on this model.... but I can tell you that the problem is the vertical deflection IC or just the solder connections on the PC side of the IC. The part number usually starts with the letters LA and then 4 numbers. Will be on a metal heat sink. And sometimes there is a 1ohm resistor that opens and even the diode may be bad in that circuit coming off of the HV transformer through the resistor and then the diode then to the vertical IC Hope this helps.

Mar 16, 2008 | Sanyo DS24205 24" TV

1 Answer

SANYO AVM-3289G no vertical deflection


It isn't a transistor, It will be an I.C. with a part number that probably starts with an LA_ _ _ _ . It will be on a heat sink and be in the vicinity of the connector going up to the yoke. Try replacing that. But first, check all the electrolytic caps around it for testing dry (sorry - takes a special meter to do it in circuit) or just replace them. May have lost power to the I.C. as well. Look the I.C. up in the free NTE crossreference at nte.com get a diagram of its pinout to find what pins the power and outputs are on.

Dec 14, 2007 | Thomson 28VK25US TV

1 Answer

Sylvania vertical deflection problem


I don`t know where you live and it makes a BIG difference, the cost of doing business is waaay more in NYC than Peoria. At my shop if you brought it in, approximately $110 plus tax (6% here in Fl.) I`m basing this on the fact it needs the output IC, you may not need the IC it`s possible the 26 volt line is missing to the IC but you asked for a generic guess and that`s what it would cost you here, remember: Big City means big rent which means much higher bill, I`m in a little town in western Fl. hope this answers your question, good luck

Nov 27, 2007 | Sanyo AVM-2557 TV

1 Answer

Sanyo 25" Standard Tube Vertical Deflection Problem


you can proceed as follow to fix it.

  1. reduce brightness to minimum to avoid screen burn.
  2. check voltage on vertical uotput
  3. check yoke connector for loose.
  4. check v/yoke winding.
  5. check v/drive from signal processor to vertical output

now your problem how to find out whether drive is there or not it is very simple even you donot have scope.

you simply touch with screw driver or meter prob  at the poibt where vertical signal is input to vertical stage

if h/line is spreadindg or tries to spread then your output is ok &problem is in drive ckt.

for schematic try given site give model no &download it

http://www.eserviceinfo.com/index.php?what=search2

hope this will help

 

 

Oct 12, 2007 | Sanyo AVM-2557 TV

1 Answer

TV


The vertical output IC has stopped working. The vertical output IC is the part that drives the coils in the yoke that spreads the picture up and down. This could be because it has cracked loose from the board (solder joints) or it simply burned out. Sometimes a bad pump-up cap will cause the vertical output IC to short out, and when the IC shorts out it often opens up a small value resistor next to the flyback. This is a relatively easy thing to repair. A qualified tech will be able to tell exactly why the vertical output has stopped working and repair it for you.

Aug 25, 2007 | Sanyo AVM-3659S 36" TV

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