Question about Haier HTN13R12S 13" TV

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Tv comes on once with retrace line and shutsdown

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The video output card has loose solderings on it. Check and resolder all the suspected solder terminals. This board can be located at the neck of the picture tube, will be directly plugged on to it.

Posted on Jan 24, 2013

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What can be done with retrace lines on my set


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Reasons and repair procedure to retrace lines in picture with CTVs are given with illustrations.

Aug 13, 2014 | Samsung TXD1972 19" TV

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.

May 22, 2012 | Daewoo DTQ-20U6SC 20" TV

1 Answer

How do we set the g2 voltage properly


turn blue black to off. turn tv to av mode. then adjust g2..until retrace lines appear on the screen.then decrease the g2 until the retrace lines disappear.

Apr 07, 2010 | Orion STV2763 27" TV

1 Answer

SONY TV PICTURE TURN GREEN WITHOUT RETRACE


Picture goes to high green with retrace lines that shows picture tube is defective and requires replacement.
Usually in above symptom, TV goes to standby mode and standby light blinks when green raster problem occurred.
New TV is better option because picture tube of KV-34XBR960 would not be available any more.
Thanks.

Aug 14, 2009 | Sony Televison & Video

1 Answer

Have 46 samsung dlp that has green lines all over the screen . menu still works but doesnt go away on the menu mode. the green is so thick that you cant see any picture in the background.


Red, green, or blue retrace lines ( a quote from "Notes on the Troubleshooting and Repair of Television Sets", found at http://www.repairfaq.org/sam/tvfaq.htm#tvrgbrlin )

Where only one color is showing, suspect an incorrectly adjusted individual background/bias control or bad part on the CRT neck board for that color.
  • Individual brightness/background/bias control(s) - mark setting of pot for the problem color and then see if a slight adjustment removes the retrace lines. See the chapter: "TV Adjustments". Of course, if this happened suddenly, the problem is not due to a misadjusted control though a dirty pot is possible - turn it back and forth - this might clean it and restore normal operation.
  • Component or connection on CRT neck board - insufficient voltage to or incorrect biasing of the video driver for this color can result in the CRT never totally blanking. Compare voltages and signals, and swap components between good and bad channels to confirm.
  • Blanking circuit - this may be a part of the video/chroma chip or separate. Check and compare waveforms of good and bad colors to determine if the blanking pulses are making it to the video output.
There is a slight possibility that a bad CRT may result in visible retrace lines. To eliminate this possibility:
  • Disconnect the filament - all evidence of a picture, raster, and retrace lines should disappear once the filaments/cathodes have cooled (15 seconds or so. If there are still visible retrace lines, the CRT is suffering from cold or field emission from someplace (may not even be the cathode).
  • Turn down the screen (G2) control on the flyback (usually). If one color remains no matter how you set the control, again there is some kind of weird emission from the CRT. However, if white/gray retrace lines remain, the problem may be in the screen supply.
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You will be greatly helped if you have a schematic for your TV set, and you may need to change some parts, clean some connector contacts and/or tweak settings inside the set, so remember the original settings before you tweak them...

Good luck

3rq8 (Triarcuate)

Jul 23, 2009 | Televison & Video

1 Answer

Lines on the screen


Are they thin, white lines running east to west? If so, they are called retrace lines and indicate that the screen settings for the picture tubes is set too high or there may be a mal-function of the CRT driver circuitry. Try adjusting the screen controls which are located behind the front grill of the TV behind an access panel. Once you remove the grill and access panel, you'll see a small control assembly the has two sets of controls. Three for adjusting the red, green, and blue focus, the other, the red, blue, and green screen controls. To adjust correctly, put the TV on an unused input(dark, blank picture) and adjust until there are no visable retrace lines or color in the image.

michtech

Feb 14, 2009 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

Slow to come on, picture flashes black, 32" SONY tv


blankenship, the "IK circuit" is blanking your screen, only "fix" is temporary, remove back of tv, and on rear right side (facing into the back of the set) you can see 2 philips type plastic screws mounted on the flyback transformer, one is focus the other is screen, do not adjust focus , turn screen control clockwise slowly until you get white retrace lines on screen, then turn counterclockwise until retrace lines disappear, this increases drive from tube to IK circuit, will last anywhere from 6 months to 18 months and then it`s replacement time, questions? e-mail me back. good luck, BMW Rider

Jan 11, 2008 | Televison & Video

1 Answer

Retrace lines and poor convergence


you have bad solder connections on the convergance board solder then and get back to me k

Oct 30, 2007 | JVC AV-48WP74 48" Rear Projection...

2 Answers

Green horizontal lines


Hi, I have a Philips 29PT9009/12 TV. Recently I have begun to see horizontal green lines on my tv, when either watching a dvd or watch tv. This has gotten worse and now the green lines are more visible and the background is now turned a shaded green. Please help me. Thanks in advance

Apr 30, 2007 | Philips 28PW6506 28" TV

1 Answer

Circuit board was damaged in electrical storm. Replaced with new board. Now, screen comes on full raster, but with retrace lines. Picture is very faded and barely visible behind lines. Sound is OK and...


I am unable to find in your statement about which brand or type of motherboard is used. One thing i come to know your using service mode kit. knowing in your statement your are a technical person. My simple idea is first you set the TV in standby mode using remote. Then in FBT reduce the screen control minimum position, the release standby. Now the tv is oscillated, now slightly increase screen control till get maximum video and zero retrace line set in position. Even no improvement give me clear picture of brand and microprocessor ic etc. there is a chances to solve by having the above details.

Aug 27, 2006 | Sanyo DS31520 31" TV

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