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Retrace lines at top on cs27503 mitsubishi - Televison & Video

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Check for dry capacitors near the vertical side of the tv

Posted on Sep 30, 2009

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How to repair top horizontal lines problem ?


The fault you say is retrace line problem. Reduce the screen voltage and check whether it vanishes.
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/
Retrace line problems and reasons are described by one post.

Aug 15, 2014 | 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.

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

1 Answer

TOP RETRACE LINE IN THE SAMSUNG CRT TV MODEL CB5081Z


you are going to find a open filter capacitor right at the vertical output chip (usually a 220 uf at 25-35 volts) that is open or low in value.

If the set is run like this it will soon destroy the output chip.

Mar 23, 2012 | Televison & Video

1 Answer

Mitsubishi TV had horizontal lines across the screen and rolls up


Answer
ONE: Yes, the speaker mounted close/near to the set can be a cause of mischief; please move it further away and see if that helps clear up the problem. But, you must keep it away for several days before you will know for sure because it takes some time to degauss all the internal parts that may have become corrupted by the magnets in the speaker.

TWO: Yes, any set can be repaired the question is cost and wisdom. Old sets are sometimes not worthy of the repair simply because of the likelyhood that another failure will follow soon after. A big screen always invokes a repair charge of $200 and up. After a few of these you will wish you had put all the money into a new set!

THREE: The lines are most likely a problem in the vertical blanking circuits of the set. These are horizontal retrace lines that are supposed to be blanked out during vertical retrace of the raster. Think of it as a paintbrush that scans across the screen painting thin lines and when you get to the bottom of the screen it goes quickly back to the top, but during that time the horizontal, which is many times faster, has made several sweeps; so it must be blanked out during the retrace. The repair involves finding the guilty parts and replacing them. Usually this repair runs over the $200 somewhat.

FOUR: Prior to calling in a service tech try a hard reset to see if that will recover any of the circuit degradations. Merely unplug the power cord and leave unplugged for 4 hours or more. It may help. Or, it may not help; but worth a try since is won't cost you anything.

If the set is over 5 or 6 years of age it probably is not a condidate for any expensive repair. On the other hand, it is a Toshiba - and they make a fine set.

Hope this helps. Let me know if you have further thoughts.

May 09, 2009 | Mitsubishi WS-55511 55" Rear Projection...

2 Answers

Tv problem


bias on green is too high or current is too high^^^turn bias down on focus block^^^--curved lines(not retrace lines) convergance IC`s going or resistor(s) out of range^^^replace them^^^

Sep 10, 2008 | Mitsubishi VS-50605 50" Rear Projection...

2 Answers

Lines in picture


can you post a picture of the lines that are going across your screen? Sounds like maybe retrace lines.

Feb 14, 2008 | Mitsubishi VS-45607 45" Rear Projection...

1 Answer

Mitsubishi proyection tv


what model mitsubishi do you have. It has to be video related not deflection or you wouldnt have the menu screen. Do you have snow, retrace lines or black screen? Let me know your model.

Jan 19, 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...

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