Question about Zenith C27A24T 27" TV

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Zenith 50 inch model #pv4661lk manufactured in 1994

Tv worked fine until we moved it now has an hour glass picture surrounded by what appears to be a rainbow

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Re: zenith 50 inch model #pv4661lk manufactured in 1994 - Zenith C27A24T 27" TV Standard (CRT) Televisions

Convergence board problems.

Posted on Nov 25, 2007

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Zenith 50 in RPTV Hourglass

tried to re seat the connectors in the convergence circuit, if can not get get with reset check if their is a burnt resistor near the convergence ic.

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The picture is oversized and the printing as in the stock ticker or in the sports scores can only be seen a little bit on the bottom. Can't find anyway to resize the picture.

Zenith sets, like most others now, are adjusted electronically through a service menu. You'll need your original remote control (or a Zenith-brand universal replacement with a MENU key) to access the menu. Press and hold the MENU button until the channel number and time display goes away, then press 9, 8 , 7, 6, ENTER. This puts you into service mode.

In service mode, CHANNEL UP and CHANNEL DOWN move through the different settings, and VOLUME UP and VOLUME DOWN change the values. Make sure you write down the original value of anything before you change it so you can put it back if necessary. One of the reasons the manufacturers hide the service menu is because the set can be damaged by incorrect settings to some of the parameters.

On some models, you can't get to all the parameters unless you change one called F MODE from 00 to 01. You might need to do this on yours.

The list of parameters varies by model and features. I haven't worked on a Zenith in a long time so I don't remember exactly what yours says, but you want to find two settings for V SIZE (vertical size) and V POS (vertical position). Adjust the size first by lowering the value until the top and bottom of the screen are black. Then adjust the position so the picture is centered (black strips close to equal size). Finally, increase the size until the picture fills the screen again. It's normal to adjust for a little overscan, meaning you push the top and bottom a little bit out of view. If you stop too soon, on some channels you might see flashing lines at the top of the picture.

When you're finished adjusting, turn the TV off to exit service mode. If you needed to change the F MODE setting, put it back to 00 first. Your picture should be properly sized after all this.

Mar 19, 2011 | Zenith SY2772DT TV

1 Answer

Zenith 50'' TV blurry

There is internal elignment with the guns on the projection unit. They come loose. TV guy time

Mar 30, 2010 | Standard (CRT) Televisions

2 Answers

My 27 inch orion tv picture looks like hour glass

you have to make sure that if you are using external/additional speakers that you keep them away from console. I had a similar problem when I install a surround sound system in by bar and one of the speakers was very close to the TV. A good friend of mine walked in and said "if you want to get rid of that picture problem and save the life of the TV you had better move that speaker." It has to do with the magnets in the speakers.

Jan 24, 2009 | Orion STV2763 27" TV

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Black rectangle on bottom half of screen

captioning on turn off with remote.

Nov 12, 2008 | Zenith B25A02Z TV

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Picture but no sound

press mute button on tv remote

Oct 20, 2008 | Zenith B27A11Z 27" TV

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Snowy screen just pops up

Bad tuner in tv....might be possible to solder bad connect in

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Sounds like bad solder connect in tv tuner....can usually be
repaired or replaced.......................T.

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Tv picture shaped like hour glass

Big cap in the regulation ckt is bad. Depending on model could be various values, a shop could use their ESR meter to find and replace it.

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1 Answer

Picture Shortens, Converges, eventually the set shuts off - $50 for Correct Solution

Open the TV amd turn it on in a position you can see the picture, possibly through a mirror. Now gently tap all of the metal heat sinks on the circuit board until you find the one that is sensitive it will have a small chip mounted vertically on it, with probably like 7-10 pins. The number on the chip will most likely be an "LA****" number. Now turn the circuit board (UNPLUG FIRST) over and resolder the pins. This is your problem 99% of the time. Be very careful there is High Voltage inside this TV.

Apr 26, 2007 | Zenith IQB36B42W TV

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