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Blurred picture on screen, distorted sound with vertical retrace lines?

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It sounds that either the screen voltage to the G2 grid of the picture tube, or the smoothing capacitor connected to the video output supply voltage has the fault. Replace the capacitor mentioned above. The value to this capacitor will be in between 10 to 22 MFD 350V or so.

Posted on Jan 15, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

techman
  • 3130 Answers

SOURCE: Blue Saturation with retrace lines visable

could be but there are a few checks that need to be donr first.. Try to turn down the g2 control just a bit on the flyback transformer. If no effect unsoder the blure drive transistor on the crt board If the blue is still there that means the crt is shorted and you could try to clean the elements with a crt rejuvenator and see if that helps. If the screen goes to red and green after you disconnect the blue drive transistor then you need to check the osd drivers as well as the rgb output drive from the video IC. If the blue gun in the tube shorted or leaky I have in the past and it really works a isolation transformer that plugs in to the crt socket and the other end plugs into the crt. What this does is isolate the the gun of the crt from the filiments and thats where they get shorted or leaky but for how long it will last who knows.

Posted on Mar 26, 2006

  • 556 Answers

SOURCE: insufficient vertical height

1 it is due to electrolytic capacitor defective in vrtical output stage. 2 loose contact in vertical. 3 fault due to feedback ckt in v/stage. as per schematic diagram is concern check www.serviceinfo.com

Posted on Sep 29, 2007

  • 4234 Answers

SOURCE: RCA 24V511T Vertical problem

There is a problem with the vertical circuit. In many cases this is either poor solder connections or a defecitve vertical IC. If you can solder you should be able to fix this yourself. Please note that there are potentially dangerous high voltages present inside the set even when unplugged. Let me know if you wish to attempt the repair and I'll provide additional details and instructions.

Thanks,
Dan

Posted on Jan 30, 2009

  • 88 Answers

SOURCE: distorted picture on my 32" Proscan TV...(about 15 years old)

The RCA GE sets have a problem with bad solder connections in the tuner unit which also causes numerous symptoms including poor regulation, no vertical deflection, low audio or dead set.

Pulling in from the sides is either poor regulation or a bad eeprom/solder join issue

Posted on Mar 13, 2009

bhatgiri73
  • 106 Answers

SOURCE: Vertical sweep is failing,retrace lines appear at

most common vertical ic s are7840 or 78040...but ur problem is 100mfd 40v capacitor in vertical section.. change it then u will get perfect pic...have anice day..

Posted on Mar 05, 2010

Testimonial: "Thanks, there does not seem to be any schematic available for this particular model."

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Why does my sanyo flat screen TV have vertical coloced lines on screen with no picture?


Check the ribbons going in between the boards and "work" them to clean up all connections. And on the main board look for possible bad caps.

Your t con board is responsible for all picture distortions but not the vertical lines you described.

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1 Answer

Picture up side down vertical retrace lines


Upside down picture is due to the connection reversal to vertical scan section winding at the deflection yoke.
If you wish to know more about retrace lines, and the repair work to it; visit this site. http://electronicshelponline.blogspot.com/
Reasons for retrace lines are given with illustrations.

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Samsung HiTron, CD50F2, high bright, flyback line white visible, menu text blurred


Check the screen voltage. Adjust it to a little lower and check. Check the supply voltage to its video output stage [CRT base card]. If this voltage is less than normal, this kind of fault can occur. Check the smoothing capacitor [the electrolytic capacitor of low capacitance value] is bad. If it is bad, the voltage stated above will go low,and the retrace lines will be visible. Check these.
The fault you now see is technically called vertical retrace lines with picture. The above said are the main causes for this.
If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience.
http://electronicshelponline.blogspot.com/ Pull up older posts.

Mar 31, 2014 | Televison & Video

1 Answer

Panasonic ctp2780sf no picture faint line going vertical across screen


There are two reasons for this fault. A fault smoothing capacitor at the video output voltage rail, or excess of screen voltage. These lines are called 'vertical retrace lines' technically. Check this link for more details. It has a post, which have information regarding this fault. Go to older posts there.

Dec 25, 2012 | Panasonic Televison & Video

1 Answer

Daewoo dtq-206sc have retrace lines


if retrace lines at top of picture the issue is in the vertical circuit--usually a bad filter cap and or the output chip (most of the caps that cause that are 220 uf or 330 uf and connected directly to one pin on the chip.

If retrace lines are across entire screen---likely the master screen control on the Flyback is set too high--causes excessive brightness and the retrace lines.

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1 Answer

Blurred picture


Sounds like a resistor in the convergence circuits or covergence amp ICs them selves. Usually the ICs will distort the picture. My guess would be the flame proof resistors near the ICs 1 or 2 may be oen. Let me know if you need anything further.

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1 Answer

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Sounds like retrace lines. Leaky caps or worse can cause this.. Are you getting any vertical foldover at the top of the screen?

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Sounds like the image sensor is malfunctioning (common symptoms: distorted images with purple or green cast, completely dark images, flickering lines across the screen.)

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1 Answer

No picture/vertical lines on screen


it's called retrace lines ,your screens are set to high or focus block assy which has the screen adjustments on it also is faulty

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TV Problem


No. Are the lines white or black? Does the picture look distorted at the top? Is there a chance it is still under warranty? It sounds like a problem in the vertical retrace circuit. Probably a capacitor near an IC that's used for timing. You shouldn't be having this issue already. A tech should be able to see a distorted waveform in the vertical section. Hope this helps.

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