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Picture fault Picture has shrunk width ways, picture edges are jagged with no aerial input blue screen has flyback lines

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Re: Picture fault



What is picture like if you change screen size to 4-3  is this picture size ok & fault only shows in the wide screen formats.

Posted on Oct 10, 2007

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Hi, I had a problem with my Sony CRT television.

The faint background lines are vertical flyback lines. Start your diagnosis by turning the brightness and contrast controls to minimum and view the screen in a darkened room. If you can now see a raster with horizontal lines visible then it is likely that the tubes A1 screen voltage is excessive. The screen voltage is usually within the range of 400v to 600v. Adjustment for this is often part of the flyback transformer. Check all high value resistors
in the screen and focus circuitry. Some of these reistors may be
built into the flyback transformer. As the picture gets brighter the beam current increases, this will eventually cause the X ray protection circuits to trigger shuting off the set. A fault in the video drive circuits to the cathodes of the tube will cause similar symptoms but usualy results in a predominance of one colour, ie
bright red, blue or green raster with flyback lines.

Oct 20, 2013 | Sony KP-53HS10 TV

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Set comes on with a blue screen with retrace lines,then shuts down. Turned down screen control on flyback, set stays on cannot control brill

The set is shutting down because the picture tube is been over driven, it is most likely the picture tube has a short in the blue gun, turning down the screen control drops the voltage to a safer level. The only other possibility is a short video driver and open feed resistor usually located on the video board on the back of the picture tube.

Feb 23, 2011 | Sony KV-32S40 32" TV

1 Answer

My toshiba 2577db has a blue line across

easy the vertical chip is dead /and or two
caps right next to it , total cost of part 8.00
so dont let them charge you to much if
you take it in to a shop

Jun 28, 2009 | Standard (CRT) Televisions

1 Answer

Av-32f476 picture shrinkage

I had a Crummy Westinghouse TV that had a problem like this. JVC's are typically better built then a Westinghouse. My first educated guess - sounds like it's a voltage issue, most likely on the high voltage. Probably a capacitor on the power supply side of the motherboard or the capacitor in the flyback transformer. Just and educated guess.

Jun 23, 2008 | JVC AV32F476 32" TV

1 Answer

Horizontal blue line

The intermittent horizontal line is cause by a loose solder connection in the vertical amplifier IC.
The IC is mounted on a heatsink nearby or around the flyback transformer.
The way to fix this failure is to add fresh solder where you see some brown spots on the circuitry that were cause by components getting hot.
Good Luck.

Jun 20, 2008 | Sharp 25R-S100 25" TV

1 Answer

Sony trinitron KV27V22

Solder any / bad connects horiz,vert and power supply then
try again....................T.

Please rate this solution.........................

Nov 15, 2007 | Sony KV-27V22 TV

1 Answer

Jagged horizontal blue lines everywhere

convergance amp ic bad

Mar 10, 2007 | Mitsubishi VS-45609 TV

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Tv has lost two outer sides of vision despite changing picture mode

That's either a high voltage problem, or a deflection problem. WARNING, CRT Based Televisions have potently life threatening voltages inside them, and should be serviced by trained personnel only. With that out of the way. According to It's a capacitor failure Fault - Width and E/W correction fault Remedy - Replace R626 and C630 I don't have a manual so I can't tell you for sure what the resistor and capacitor do, or where they are located.

Dec 30, 2006 | Bush WS6671 28" TV

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Tv showing blue screen with flyback lines sound ok

Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket

Dec 27, 2006 | Philips Magnavox 20MT133S 20" TV

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