Question about Mitsubishi WD-52525 52" Rear Projection HDTV

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Picture in narrow line on 35" Tube set

I have a tube set, picture is in a compressed narrow horizontal line, about an inch wide. Audio is fine.

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  • 208 Answers

The problem you are describing is called loss of verticle deflection. You will find this will require diagnosis and there is no simple answer to this repair. Most likely there will be either bad electrolytic caps or bad vert. output IC in the vert. circuit.

Posted on Mar 29, 2008

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1 Answer

Purple static lines and a jumpy picture


Your picture tube is about to go.
If it's still under warranty,take it back.
Hope this helps.

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Six year old 53UDX10B - Faint Horizontal Lines in Picture


This is a pretty common fault here Mike. I cannot remember the capacitor number, but it is right off of the flyback transformer and supplies the screen voltage to the picture tube driver transistors. You will need to get a scematic and trace out and check the flyback secondary capacitors for leakage, I am sure you will have more then on or two capacitors that need to be replaced. One more thing with this TV set. Look right under where the picture tubes are on the printed circuit boards, for an indication of fluid leakage or an oily substance. If you see any evidence of this, turn off the TV set and unplug it and call out a tech to try and clean off these boards before any further damage happens. Good Luck

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Sounds like the convergence has failed. This video gives more details

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1 Answer

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The green CRT's (color picutre tube or color wheel, or ballast) will need to be tested for replacement.
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May 06, 2009 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

35 inch Mitsibutchi TV model #CS-35201A, serial #502637, manufactured 1993 TV made a popping sound when turned on and now only visable object is a straight horizontal colored line in middle of screen....


Hello dan82810,

The picture tube or CRT is not the problem, and yes this set is fixable. What has happened is that the vertical deflection circuit has malfunctioned. More precisely the vertical coupling capacitor has malfunctioned (The pooping sound was the capacitor exploding).

Open up your TV (take the back off and unplug the set), and look for the damaged capacitor, it will look puffy or if it has exploded.

To fix this problem you will need the schematic diagram for the TV (can be found at www.servicemanuals.net). Then you will need a multimeter to measure the DC voltages on the vertical output circuit, and finally an oscilloscope to measure the waveforms at the vertical output circuit and the input to the vertical windings of the deflection yoke transformer.

Now what you should basically find is a sawtooth wave at 60Hz which is the drive for the yoke transformer. However since the coupling capacitor is bad you will have the wave at the output of the vertical output stage, but not at the input of the yoke transformer. Use the schematic to find the value of the capacitor that has malfunctioned.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Feb 28, 2009 | Televison & Video

1 Answer

Hitachi 50SBX78B Horizontal lines and bow


John, Hitachi site is down at the moment, if you remove the clips on the front of the IC`s you will see the numbers of the convergence ic`s, and yes they are a pain to get out, they are probably stk 392-110`s if they are the originals, you`ll have to un-solder 36 pins total to get them out, check for burnt resistors in the general area of the ic`s and replace any that are burnt before turning the set on,be sure to order a tube of "heat sink compound" to apply to the back of the new IC`s, once on the set will probably still look poor, this is normal, run the set for minimum of 15 minutes then push the " magic focus button " inside the front door panel, after it has finished running magic focus it should look great, video-tek

Feb 08, 2009 | Hitachi 50SBX78B 50" Rear Projection...

1 Answer

Bowing in the middle like an hour glass


about the zenith it seems you have the flyback transformer malfunctioning - try to change it - delfo

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2 Answers

Intermintent picture


Check the horizontal output transistor this could be damage and causing the problem.another thing is pilot light that cause the screen to light up.since this is a projection t.v.it does not garry a tube.

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