Question about Sharp 19R-M100 19" TV

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Excessive brightness with horizontal retrace lines

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This usually means the red, green and blue driver transistors on the CRT board have lost their 180 volt pull up voltage. So you will be looking for a diode off of the flyback transformer that usually will have a current limiting resistor before it that has opened. These resistors are usually low in value.

Posted on Nov 12, 2009

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How do you fix horizontal lines on a zenith tv


Retrace lines. 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/
Search the site with keyword 'retrace lines'

Mar 23, 2015 | Zenith Televison & Video

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There are re-trace lines across the CRT.


check the G2 ,if to high retrace lines wil be vissable.If ok check the RGB,12V on picturetube panel.
Are the lines in one collor then check the circuit of theat collor

Jul 27, 2009 | Televison & Video

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My tv sony kv-xa21m61 display too bright and many horizontal lines. no picture


Vertical retrace lines is the problem. Thin white lines runs across the entire screen, at about an inch apart to each other. Check its video output supply voltage. Reduce the screen voltage to a little bit down and check. If you still wish to know more about this fault, check this site. Pull up older posts there.

Feb 09, 2013 | Sony KV-XA21M61 21" 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

Solid thin horizontal line


Check for excess screen voltage. Adjust the screen control to eliminate these vertical retrace lines. [Thin white line acorss the frull screen at about 1 inch apart.]

Mar 10, 2012 | Televison & Video

1 Answer

At first it was lots of horizontal lines over the screen, and later TV screen went completely black. The sound still is perfect. Perhaps I just need to replace the fuse? I love this TV! Thanks...


Hello
You have stated that your TV has a lot of horizontal lines before it went off picture. We say that lines as retrace lines. So many of them will there on the entire screen, at about one inch or so apart, horizontaly scattered along with picuture. At that time, you may be unable to down the brightness control also. Even though you have reduced the brightness control to zero position, there will be some brightness level on the screen. You should have to repair that fault at the begining. There is a voltage going to the picture tube base, known as screen voltage. That voltage determine the emission of the picture tube, and we call it a bias voltage. When it goes higher than normal, this trouble ie retrace lines will occur. In long run it may spoil the picture tube itself. I don't know what the case of yours.
Anyway it is best for you to consult an experience technician in this case. Ok.

Nov 05, 2010 | Sony KV-35V35 TV

1 Answer

IM A TV TECH. I HAVE A SONY LCD KP-60XBR800 I HAVE NO RASTER. POWER OK, MENU OK BUT NO RASTER ON TUNER, TUNER VOLTS OK,CAN YOU HELP ME PLEASE. THANKS my email sergioaguirre0182@hotmail.com


check the high voltage with the screen control turned up high where there is no raster. suspect problem within the video circuit where there is no high voltage or defective picture tube.some time when the screen is black and the screen control advanced,you can see if the tv has video or vertical or horizontal problems on the screen.service the high voltage circuit if there is no raster or high voltage is seen.no raster can be caused by the no heater or filament in the CRT.---- a defective picture tube can cause many problems, such as, poor brightness ,missing colors,intermittent picture,poor focus,a single-colored raster,arching in the gun assembly,retrace lines in the picture,negative picture,chassis shutdown,noheater or filament lit and no raster to name a few.an open filament or heater can cause no picture or no raster symptom.a defective CRT can have an extremely bright screen.loose particles of the cathode element can lodge between the grids and cause an intermittent black and white picture. simply tap the ends of the CRT gun assembly and notice if the picture begins to flash off and on.---- with a leaky picture tube after turn on the raster dims and get extremely bright.a dim picture with no green in the raster can result from a bad green assembly. a heater-to-cathode short can cause a raster to change colour or a result in no raster at all.replace the picture tube if there is severe arching in the neck of CRT. excessive brightness with retrace lines and a vertical collapse to a thin line can be caused by a bad coil on the neck board of the picture tube.rejuvenate the picture tube when there is very bright green screen. check for the resistance change on the resistors of the CRT neck board for an excessively bright picture with retrace lines.excessive dust inside the CRT spark gaps within the picture tube socket can cause the very bright raster and the chassis shutdown.a defective video amp,luminance buffer,or reference transistor can cause a bright picture with retrace lines. -------- for getting any required parts to replace you can get it from www.radioshack.com or from www.partstore.com or from www.shopjimmy.com --------- thanks.please do rate the solution.thank you for using fixya.keep updated.

Sep 06, 2009 | Televison & Video

1 Answer

Excessive brightness with retrace lines


Here are the values:
RY04 >>>> 68 ohms >>>> 1 Watt
RY04A >>> 47 ohms >>>> 0.5 watt
RY02A >>> 330 Ohms >>> 0.25 Watt.

All resistors should be 5% tolerance.

Apr 17, 2008 | Apex Digital GT2715DV 27 in. TV/DVD Combo

1 Answer

Screen went full bright one day.


Hello, please check the 10uf/200V capacitor around flyback transformer. Best regards, Arpi

Jul 17, 2007 | JVC AV-27230 27" TV

2 Answers

Horizontal 'pinstripe' lines on all channels


sound like the screen control on the flyback is set just a little too high. the flyback has the red wire attached to the tube. the flyback has 2 small adjustable controls. if you look close enough 1 is marked focus & on is screen. turn the screen slightly to the left & look at your picture. the screen is like a master brightness & if it's up too high you will see what is called retrace lines. good luck.

Jan 16, 2007 | Daewoo DTQ-20N3FC 20" TV

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