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Tv screen looks like an hourglass!! i need set up code for a is-tvhd30

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  • Robert Johnson May 11, 2010

    what is the make and model of this unit?

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This can happen when the power supply is not there, 1 cause is a blown convergence chip or maybe the fuse is just blown, the first is the probible cause.

Posted on May 27, 2010

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If your tv pic looks like & there no black space on the sides your prob will be in the convergence circuits, 99% the IC'S they are mounted on large metal 'het sinks'. The #'s on the IC'S normally start with STK392-110, eg. If black on sides loo into pi cushion or damper circuits. Good luck.

Posted on Apr 02, 2008

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There is malfunction in the horizontal circuit for sure

Posted on Apr 01, 2008

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Your problem is not an adjustment. You will need to change the convergence IC's. What brand and model number is this TV?

Posted on Mar 31, 2008

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1 Answer

Picture has hourglass look and has split screen picture hourglass comes and goes but split screen is continual


If hour glass on conventional set it is either pincussion circuit or power supply---by split screen if you mean folded over top to bottom in the middle that is in the same areas.

Apr 06, 2012 | ESA EF427E TV

1 Answer

My TV has been acting strange lately. When I turn it on, the screen looks purple and has these horizontal lines up and down the entire screen. They don't expand to both sides of the screen, though. WHen...


there seems to be a problem in the horizontal circuit...there is a control on the flyback transformer that is labeled "screen". (you'll have to take the back off) The flyback is the component that looks sort of round with the red high voltage lead coming out the top and connecting to the top of the picture tube.On the back of the flyback there will be 2 or 3 controls if 2 there will be 1 focus and 1 screen, if 3 there are 2 focus and 1 screen..using an insulated flat blade screwdriver, slowly turn the screen control counterclockwise to see if this will make the lines go away...if not then there is a horizontal cicuit fault and quit possibly a pincushion problem(hourglass effect)..these will need to be checked by a service shop

Jan 22, 2011 | Sylvania 6432TFY TV

1 Answer

It has an hourglass shape when first turned on but


Your TV set has trouble in its "pincushion correction" circuitry, which corrects distortion so the picture is straight on the screen. Unfortunately, it's not possible to pin the trouble down to a specific part without having the set for troubleshooting. Since the trouble clears up after the set's on for a time, it's probably due to a faulty capacitor or intermittent solder connections. Because of the troubleshooting skills and tools needed, you should let a professional service shop handle the repair. This kind of problem is relatively inexpensive to repair (at least parts-wise; I've been out of the repair business for a while now, and have no idea what kind of labor prices shops are charging) and would not cost nearly as much as a replacement TV.

Sep 24, 2009 | Panasonic CT-35XF53 35" TV

2 Answers

Have you ever had this problem?


Sorry Ginko, but a convergence problem would have the curves down from the top and up from the bottom. The hourglass shape is a pincushion problem. This can be as simple as a bad capacitor in the pincushion circuit.

Could you please confirm the model number so I can look up the probable part?

Thanks,
Dan

Jan 08, 2009 | RCA F32632SB 32" TV

1 Answer

Hourglass shaped picture on rear projection Hitachi 48 inch older


you will need to take the TV and have them diagnosed it for you.

Dec 05, 2008 | Sprint Hitachi P300 Cellular Phone

1 Answer

Insignia TVHD30 has picture that pulls in at the sides


HELLO it sound's like you need to set the convergence. on the set.!!! or need to replace the ic chip's on the convergence board. to fix your problum. "good luck"

Nov 25, 2008 | Mitsubishi WS-55859 55" Rear Projection...

2 Answers

Red sideways hourglass


Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Jul 20, 2008 | Philips 60PW9363 60" Rear Projection...

1 Answer

Screen looks like hourglass


You have a convergence problem. Most likely the convergence IC's will need to be replaced.

Mar 30, 2008 | Televison & Video

1 Answer

Hourglass shape on screen


you might tyr adjusting the eprom setting to correct the e/w pincushion fault,or call for service to adjust.

Nov 06, 2007 | RCA 32F531T 32" TV

1 Answer

Hourglass screen


Did you check for fuseable resistors open when you changed the chips? This usually happens on a pioneer set . Did you get a manual?? You shount try to fix a set without a service manual. i'll see if I can get the way to do it BUT your still going to need to find those fuseable resistors thats bad. A manual makes it alot easyer. Good Luck

Aug 06, 2006 | Pioneer PRO-200 60" Rear Projection...

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