Question about Sanyo DS27910 27" TV

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RE:Sanyo 27 " Flat Tube Set

Hi This is a vertical problem, the image on the screen is about 5" to 6" vetical, full horizontal deflection, and the image displays severe fold over, I have checked all the capacitors in the vertical ckt, resistors as well as diodes, and find no defective parts, I've tried replacing the vertical output itself, and still no luck, I've checked the yoke, and does not appear to show an open condition, at this point I'm stumped! any ideas as to what to check next? Mark

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Re: RE:Sanyo 27 " Flat Tube Set

You have a bad cap or caps look to see if there is hump on any

Posted on Aug 19, 2009

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Re: RE:Sanyo 27 " Flat Tube Set

What about a cap in the power supply for the vertical circuit? Usually found near flyback-- 2)check vertical drive signal (comes from jungle IC ).Use your scope....

Posted on Sep 26, 2007

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No verticle deflection

NO VERTICAL DEFLECTION MEANS YOU HAVE A HORISONTAL BAR IN THE SCREEN?, Check the power supply for the correct voltage to the vertical circuit, check the vertical DRIVER circuit, check the conductivity of the YOKE (vertical winding) on the neck of the tube

if you have a VERTICAL bar in the screen (common mistake) check all of the above relating the HORISONTAL circuit

good luck!

Jan 13, 2011 | Sanyo DS27800 27" TV

1 Answer

My 27 inch Insignia flat screen tube TV goes blank

The vertical deflection has gone out. Put it in the shop.

Apr 24, 2010 | Insignia NS-27RTV 27" TV

1 Answer

When I power on my Mitsubishi CS-35313 tv, I only get a thin horizontal line across the center of the picture tube. What could be the problem?

There is a failure in the vertical deflection circuit. Typically there is a vertical output i.c. that provides the deflection vertically. The i.c. itself is a fairly common component to fail. There are some lower power circuits that feed this output device that also could be the problem. When the electron beam in the tube is not deflected vertically it "writes" only horizontally across the center of the screen thus resulting in a single trace. Be careful not to leave this at high brightness for any extended time as it can "burn in" that area of the screen. Unless you are a "techi" this is a job for a qualified technician. Troubleshooting would be in the vertical deflection section of the set. Most of the parts are not expensive in themselves, except for the deflection yoke which sits around the neck of the tube. The cost to repair would typically be the shop labor.

Nov 25, 2009 | Standard (CRT) Televisions

1 Answer

10 yr old Quasar 25in color tv. Audio is ok. No raster for picture, just horizontal electron beam trace across screen. No vertical deflection for picture display. Any suggestions other than using tv for...

Don't have specific knowledge about this model but the problem is in your vetical o/p section an is fixable.
In general read below.

This is an easy repair if you've ever soldered and would not be too costly for a repair shop to do it for you. The problem is a bad Vertical Output IC (usually mounted on an aluminum heat sink with the part on it labeled LA78?? ) and 1 or 2 bad capacitors. Some times you can even fix the problem by re-soldering the contacts of the IC- To find the IC follow the 4 wires that come from the Yoke (which is a contained coil of wires slipped over the neck of the picture tube(s)) back to the board. 2 of the wires go to the horizontal o/p and 2 to the Vertical o/p the thinner gauge wires are for the vertical.

Sep 22, 2009 | Quasar SP-2722 27" TV

2 Answers

H line problem

I think you are describing 'no vertical deflection.' If all you have on the screen is a single horizontal line, the vertical deflection circuit (or IC) has died. Unless you have service documentation on hand, I can't give a part number to replace but this is typically not an expensive failure and if the set was OK before, it is worth having repaired.

Jul 05, 2009 | Sansui 27" TV

1 Answer

Vertical line in center have replaced vertical output ic

If the line is vertical then the problem is no horizontal deflection. The vertical chip is probably fine.

Check connections around yoke (thats the connector with at least four wires that goes up to the coils around the neck of the tube)

Maybe that TV has two horizontal output transistors. One for deflection and one for high voltage? Check both of them. Look for bad solder joints!!!

May 21, 2009 | Sanyo DS31520 31" TV

2 Answers

Picture tube has a horizontal line across the screen but not picture, just the sound comes through. I can sometimes regain a picture by quickly turning on and off the surge protector switch, but lately is...

You are experiencing a lack of vertical deflection or vertical collapse. Since it will come back the first thing I would suspect is “ring cracks” in the solder joint in the vertical circuit, mainly the vertical IC. These suspect solder joint can be re-soldered and the television set repaired.
I would suggest that you contact a local servicer. If you are repairing the set yourself, be careful, there is always a risk of shock when dealing with electronics.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post.

If I have helped you, please help me, and rate this suggestion a FixYa rating. If not then please comment to this post and I will try to help you further.
Thank you for your support

May 15, 2009 | Sanyo DS27510 27" TV

1 Answer

Jvc av-29ts2ek

It sounds like a vertical deflection problem. You mentioned you had a white HORIZONTAL LINE in the middle of the screen. If this line runs from left to right across the screen it's in Verticla deflection. If it runs from top to bottom, it's in Horizontal deflection. I am assuming the problem is a Vertical deflaecion problem. The repairs necessary are most likley to replace the vertical capacitors or the verticla deflection chip.
Good Luck
NC Electronic Mills, Wyo USA

Jan 05, 2008 | JVC TM-2703SU 27" TV

1 Answer

JVC 27" CRT TV AV-27BP3 display shows single horizontal line

I have a similar problem on my CRT computer monitor (AcerView 76c). It is an old screen and I think it is just at the end of its life, much like your TV. Having some background in physics, I would be pretty sure that the problem is with the cathode ray tube's vertical deflection system. The horizontal deflection electrodes are working while the vertical one is not. This results in a display of a single horizontal line (or in my case, a few superimposed) in the centre of the screen. Where both X and Y (horizontal and vertical) deflectors fail then the electron gun firing would result in a single bright spot in the dead-centre of the screen.

So really, we have no choice but to move on and buy a new set as repair is probably just as, if not more, expensive than replacement with a new device. Seeing as your post was in 2007, I hope you managed to solve the problem.

Best wishes,
SZ (Sydney, AUS)

Dec 24, 2007 | Standard (CRT) Televisions

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

hope this will help



Oct 12, 2007 | Sanyo AVM-2557 TV

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