Question about Zenith SY2728RK TV

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Focus my picture is out of focus

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TRY ADJUSTING THE FOCUS ON THE BACK OF THE FLYBACK

Posted on Oct 18, 2008

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Its the convergence problem in your power supply board

please check out this links

for convergence board ics reparing it your self

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

and for convergence settings

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html


also check out for the convergence bulb if that goes dim the screen becomes out of focus

thanks.



Posted on Oct 13, 2008

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1 Answer

Pix is dim and too big for screen


Hello
Your TVs focus voltage has some trouble. You gets an out of focus piture now. There may be two reasons for this fault. The first one is, the focus pack trouble. The second one is picture tube base socket trouble. Both are repairable.
Focus pack is integrated with Line Output Transformer [LOT], and picture tube base socket is soldered directly to picture tube base card. You just open the TV and check whether there is any "Shhhh" sound comes from the neck side of the picture tube while tv is working. If it is so, you will get a smell of Ozone gas also. If it is so, switch off the set and unplug it from mains socket, pull out picture tube base card from the picture tube neck. Be gentle, and not make any shakes while pulling it out. The neck part of the picture tube is very thin relative to its other portions of the picture tube, and have a chance to break. So be carefull when you pull it out. You can see the base socket soldered directly to it. There will be two wires also, for some sets only one, attached to it. Normally the red wire going to a slot in the socket is focus wire, through which focus voltage reaches to the relative pin of the picture tube. Just detach the wire out from the socket, desolder it out and go for a similar type, and pin confuguration. Replacing it will solve your problem. After replacing the picture tube socket, a slight focus adjustment may be needed. Sometimes may not. The focus voltage can be adjusted. Its adjustment control is located on the above said [LOT]. There will be two adjustment controls, marked Focus and Screen. Out of which the upper one is for focus adjustment, and the lower one is for screen adjustment as its markings states. You just adjust the focus control very little, while watching the picture on your tv screen. Take menu display for reference, rather than moving pictures for focus adjustment, so that you will get a stationary image for reference.
The second stated trouble is related to the screen-focus pack integrated with the [LOT] itself. If it has got damaged, there is no other way than replacing the [LOT]. If so desolder it out from the circuit board, after detaching the anode cap from the top of the picture tube,and focus and screen wires. Before detaching the anode cap, care must be taken, as there may be some extra high tension voltage charge on the final anode of the picture tube, which is dangerous. You must discharge it before unpluging it, otherwise you may get electric shock from it, even after the Tv is switched off and unpluged from the wall socket. The charge may retain there for hours. So be careful.
If you have any more doubts, inform me through Fixya. Ok.

Nov 05, 2010 | Sanyo DS24424 24" TV

1 Answer

Picture out of focus


a part clled picture tube base is gone i think!

Jan 17, 2010 | Zenith SY2765S TV

1 Answer

Picture is no longer in focus. Remote unable to


Look at the back of the TV set.
Locate the two small holes at the lower part of the set.
You want the one that has an F for focus above it.

Using a very tiny screwdriver, insert it and turn it to the left or right until the picture sharpens.

Happy TV viewing!

Dec 11, 2009 | RCA F35317 35" TV

1 Answer

Picture out of focus. type or subtitles are fuzzy Have tried all picture adjustments in "menu"


As the CRT (picture tube) weakens the electron beam will loose some of its intensity. This will cause the beam to become a little wider, and thus the scanned picture will look softer or out of focus. Most of the time, the corners, top, and bottom tend to start getting worse than the center.

Sometimes the focus bias can be cheated a little. Some models of TV sets have a focus pot on the CRT circuit board, or on the high voltage multiplier. This control works in a high voltage area. I suggest you get experienced assistance for this. If you take the TV set over to a local TV shop or find an experienced tech, he could try to adjust the focus for you.

Considering the age and type of set you have, you would be better off getting a new up to date TV set.


Jerry G.

Sep 26, 2009 | Samsung TXJ2554 TV

1 Answer

Slightly out of focus


Try crt base replacement, and adjust focus controll on FBT

Jun 26, 2009 | Philips Televison & Video

1 Answer

Focus the picture on a Model 27GT619 Television


The focus control is on the flyback transformer (Usuallly black or brown with three wires coming out of it. The bigger wire goes to the pix tube with a rubber cap at the end.) The focus control is on the side. There are two. The top is focus. Good Luck!

Jan 13, 2009 | GE 27GT619 27" TV

1 Answer

Have A focus problem.


Sounds like your yoke is not adjusted. The yoke is made up of magnets and must be alligned one color at a time.

good luck---------tomtaso

Oct 14, 2007 | Zenith B32A24Z 32" TV

1 Answer

Dirty picture


your problem is in focus control ckt.please check 1 focus wire going to crt base from flyback transformer is loose or foreign material deposited in crt base near that wire. 2 focus control mistuned. 3 if tv is old than crt is weak. hope this will help.

Oct 05, 2007 | Televison & Video

1 Answer

Sony TV with blurry picture


blurry picture is mainly due to focusing voltage is not proper. solution 1 check & adjust focus control on flyback. 2 check crt base for loose. 3 wire going to focus control on crt base got disconnected due to foreign materials deposit on it. 4 if tv is old possibility of crt getting weak.

Sep 20, 2007 | Akai CF2791 27" TV

2 Answers

Out of focus


How old is the set? If picture is really very blurry, Try adjusting 'focus'. You can find this conttrol generally at the rear of the set. Otherwise,. if you know solid state electronics, Check the Focus control on the FBT. It is also possible that the CTR Base is faulty. Replacing this helps.

Mar 31, 2007 | Zenith Z25X22S 25" TV

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