Question about Sony FD Trinitron WEGA KV-27FS100 27" TV

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Screen Image is Concave

Picture is full top to bottom but is concave on the sides. I have taken it to repair shop and the TV works fine there?? But when I return home and plug it in the picture returns to its concave sides. Could this be a low voltage problem?

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Re: Screen Image is Concave

Sony trinitron colour 29ins tv its black and white not colour but the teletext is colour

Posted on Sep 01, 2006

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My LG Super Slim 29"

You don't have a deflection yoke problem, you have a pin cushion problem. Check the pin cushion transistor.

Jul 22, 2011 | NetTV DTV-29XF3 29" TV

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Picture is too low . menus do not appear straight or are half present on screen. sides of picture appear concave. picture looks magnified.

hi friend,,,
i think it is cathode ray tube problem or an error in D-BOARD..u should repair it in service man

thank u,,,,,PLEASE RATE IT

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Where is the convergance amp?

Accros the top of the chassi.conv power supply is to the left

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Hitachi Repair

check the nearest capacitors or the vertical yoke

Jun 16, 2008 | Hitachi Standard (CRT) Televisions

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Panasonic tx-29gf10x image not filling screen

Hi there, I have the same model, and I had a simular problem , except my picture shrunk from each side of the screen into concave arc, if you know what I mean. I thought it might be a faulty horozontal output transistor, so I replaced that but did not fix it.
Eventually the picture quality dropped namely it became out of focus and i couldnt refocus it. Then it stopped all together and I heard a ticking sound, which I found was
coming from the line output transformer. A Tech friend told me it was probably a cracked or burnt out HV Capacitor, so checked them all and ofcourse they were all o.k.
So I have come to the conclusion that the Line Output Transformer is faulty, I hope I
am right as they are not cheap.
I think I have the answer to your problem which is a very simple one:
Adjust the "vertical picture height," and it will bring the picture down and fill the bottom of the screen. To do this adjust the VERTICAL CENTER SWITCH by pushing it forward towards the tube , this switch is on Board
TNP 107985 which is located right next to the AV inputs on the back of the TV, the switch is a round white component with a lever on it, and is located on the top of the board, push it to the max forward position, this should help, but might not fix it enough
depending on how much space u have at the bottom. There are no other vertical height adjustments on this Model so it would have to be a faulty component, like a HV
capacitor or burnt out resistor, or not enough HT drive voltage, which suggests dare I
say it--- Line output Transformer, could be wrong though.
Anyway good luck with your problem, hope what I suggested helps.

Dec 13, 2007 | Standard (CRT) Televisions

1 Answer


The picture on my projection TV has intermittent concave right and left sides. Can you tell me what's wrong with it? your problem is due to pincushion ckt as it is intermittent so that there might loose contact or print break in pincushion ckt it can be rectified easily by skilled tech. there is no parts failure. good luck

Sep 23, 2007 | Zenith Z56Z83R/D TV

2 Answers

TV picture was warped, no it is black, but the power light remains on...

the problem you are having is in the power supply you can go ahead and take your set to a repairman o look at your set good luck.

May 02, 2007 | Philips Magnavox MS3652S 36" TV

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