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Tv picture roll

The picture on the tv rolls at times and this can pursist for a long time but can also stop on it's own

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: rolling picture

If your Television is not warrantied, there should be rca, vga, and dvi connections you can use with your pc and video card. Since I am in usa I have know idea what freeview, skybox, or scart are.

Posted on Dec 15, 2006

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MikeNJ1964
  • 398 Answers

SOURCE: Picture is Rolling..stops after some warm-up

I have seen this many times. There is a 9 volt regulator on the small signal board that causes this. The regulator goes bad and the 9 volts starts dropping, especially at start-up when the regulator is cold. If the voltage is below 8 volts then the picture gets dark and the vertical becomes unstable, with the picture squeezing down and/or rolling. As the regulator warms up the voltage starts rising back towards 9 volts and the symptoms start clearing up. There are 3 regulators in a row on the board and the regulator in the middle is always the bad one. Replacing that regulator should cure your problems but it should be replaced by someone experienced in servicing Mitsubishi projection TV's because pulling the chassis out is quite tricky.

Posted on Aug 05, 2007

Shuttle83
  • 1139 Answers

SOURCE: HORIZONTAL HOLD

Hello INDIII,

The answer is yes, if all you have to do is to adjust the horizontal hold control (usually located on the back of the TV)

The answer is no (with caveat) if you have to open up the set. This problem occurs when the horizontal oscillator is drifting off its set frequency of 15,750 Hz This can be caused by a component or components changing in value, or the problem could be caused by the loss of or decrease in the amplitude of the horizontal sync pluses within the video signal. Such a loss of amplitude can take place from the output of the Video detector to the Horizontal mixer stage (uses the Video pluses and the Horizontal oscillator to sync the picture). This means that you will be working around a hazardous section of your TV.

The caveat is if you have a background in electronics and you have the proper equipment.
1) schematic diagram of the TV to see where TV test-points are
2) multimeter to measure DC voltages at test points
3) oscilloscope to view waveform patterns in the horzontal section of the TV
4) Signal generator to produce a know good signal into the TV set.
5) Isolation Transformer to connect the TV power plug to to isolate the Tv ground from earth ground and allow proper connectivity for test equipment (plug the unit under test into the isolation transformer and the test equipment into the wall outlet.)

I hope this answers your question,
Thank you,
Shuttle83

Posted on Nov 26, 2007

  • 1153 Answers

SOURCE: Continuous rolling screen.

check out ctechnicians.com and find the error code

Posted on Dec 25, 2007

  • 1 Answer

SOURCE: Plasma Tv 42PD580DTA, Black and white screen while viewing DVDs or Video

Hi there,
My sister-in-law has exactly the same problem and is a common one with this unit.
I've spoken to a technician who says that:
1. Hitachi are withdrawing from Australia and there are VERY limited service centres left
2. The problem is a chip on the main board and depending when the TV was made will determine whether the chip is a plu-in or soldered on to the main board - if it's the latter, you'll be up for a main board at around $400
3. He couldn't get the price of the plug-in chip because he couldn't get through to Hitachi.

Cheers

Dave M.

Posted on Apr 28, 2008

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Dear, this is problem in the circuit, you need to change the VHold you your tv, but it is not an easy job, if you don't have knowledge about fixing it, it would be better to visit the repair shop, otherwise it will affect the picture tube quality and cause further damages.

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Are you sure the roll isnt Vertical? as if it is then all you need to do is adjust the VERTICAL HOLD PRESET POT which should be located on the PCB somewhere, its very unusual for TV.S to roll horizontally as then the picture just goes out of sync. and you would not see a picture at all. When you find the pot turn it ( with a small screw driver) slowly until the rolling stops, if it does not stop then you have a faulty component in the vert. sync. circuitry.

Feb 04, 2008 | Televison & Video

1 Answer

The picture rolls vertically sometimes.


I would check the capacitors in the verticle deflection circuit. Also try resoldering the verticle output as well as the verticle yoke pins where they connect to the chassis. Mitsubishi has had some trouble with their capacitors, you may have one that is leaking. Let me know if I can help you further.

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2 Answers

Picture is Rolling..stops after some warm-up


I have seen this many times. There is a 9 volt regulator on the small signal board that causes this. The regulator goes bad and the 9 volts starts dropping, especially at start-up when the regulator is cold. If the voltage is below 8 volts then the picture gets dark and the vertical becomes unstable, with the picture squeezing down and/or rolling. As the regulator warms up the voltage starts rising back towards 9 volts and the symptoms start clearing up. There are 3 regulators in a row on the board and the regulator in the middle is always the bad one. Replacing that regulator should cure your problems but it should be replaced by someone experienced in servicing Mitsubishi projection TV's because pulling the chassis out is quite tricky.

Aug 05, 2007 | Mitsubishi VS-45607 45" Rear Projection...

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