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Av-g21p out of focus,how to fix

Cannot fix in fbt

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You need the generator for pattern for to fix it. Otherwise you must try by proof and error.
God bless you

Posted on Jul 20, 2013

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1 Answer

CRT monitor screen is out of focus.text and other images looks blurry


Hi,

This kind of symptoms can be correct by the focus adjustment at the flyback transformer. FBT mostly has two control knob (Focus and Screen), focus is usually at the top one like in the sample picture below.

jdvillanueva_86.jpg

Open the back cover of your unit and then locate the FBT. Power on the unit and try to adjust the focus knob.

If the symptoms can't be cured by the this step, this is an indication that the CRT socket is already faulty. You have to replaced this parts and then make some adjustment at the focus knob of the FBT and your unit will back to normal again.

CRT(picture tube) socket

jdvillanueva_87.jpg


Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Jdvillanueva

Jul 14, 2011 | Samsung SyncMaster 753S 17" CRT Monitor

1 Answer

I'm getting an 'hour glass' effect inwhich the sides are pinching into the center. I unplugged it once and it fixed itself for about 10 mins and then went back to th e'hour glass' and...


Problem will be on the Deflection Board, You need to resolder all the connections on Board.
Deflection board is the bottom left handside board, will have FBT flyback transfomer on it and it connects to the SSB board on Right hand side that has av and cable connector on it.
Resolder all the pinns on the FBT and all of the Big Diodes.
If you are unable to Solder ,then you can ship the board to PTS they rebuilt boards 1-800-844-7871

Jul 04, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

I have a Toshiba 36"


Resolders the FBT-(flyback tranformer).Resolders the video board connections sockets holes,that the board connected to the CRT-(tv tube).Plug in the tv,to have power to the tv,take out the tv video board,for exposer of the CRT-(tv tube).Take an electrical wire with a good insalation in it,grounded to the tv steel frame some where.Take the other end of the wire go toward the open high voltage CRT-(tv tube).U will hear a pop sound,than ur tv CRT-(tv tube) is a 100% clean out of contaminations or u will hear a deeing sounds only,mean the tv CRT-(tv tube) it is to old to pop anymore,just let tv deeing sounds going on for like about 20 mins to rejuvenated the old CRT-(tv tube).After this repluging the tv video board for a tv signal and readjust the button on the FBT-(flyback tranformer) that said focus to fix the CRT-(tv tube) focus problems.

May 01, 2011 | Toshiba 36A40 36" TV

1 Answer

LG 710S monitor the picture is not my focus. I have attempted to adjust the trimmer on the FBT result there is a change but not really focus. Got another solution? whether FBT is damaged? Thanks


i think your problem is there is no clarity ...means picture is not clear ....if yes then solution is replace FBT ..................if your problem is something else kindly give little more details........

Apr 23, 2011 | LG Flatron 775FT 17" CRT Monitor

1 Answer

Picture gets bright then blinks black, adjusts and then gets bright and blinks again every 4 seconds. used to be every couple of minutes.


Take the tv aparts.Caution high voltage ERA FBT.The FBT the flyback transformer.That the big block of plastic,with a red wire with a cap hook to the CRT(Tv tube).On FBT that big block of plastic there are 2 knobs one said FOCUS the other said SCREEN.Turn knob said sceen down a bit,will stop get very bright pictures and shutdown,the screen will hold high voltages.

Oct 06, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

I was watching tv and it just shut off now the power light is blinking red and a clicking noise is coming from the tv. It wont stop unless I unplug it


i chaged some flyback on that model. you can unsolder b+ of fbt and replace with a 75 watt bulb to see if power supply or fbt.

Apr 22, 2010 | JVC AV-36D303 36" TV

2 Answers

Picture out of foucs


HIGH VOLTAGE WARNING - open the tv and on the flyback Xformer, there should be a knob that is labeled FOCUS try adjusting it. the flyback has the red wire on top that goes directly to the the top of the picture tube.

Jan 11, 2010 | Televison & Video

1 Answer

I have a JVC 27'' AV-27530 TV that the picture is very dark


An aging FBT if it still can be adjust using screen adjustment on FBT that will be a small tweak.

But if you are inexperienced with this, asked someone who knows how to do it to fix it for you.

Apr 08, 2009 | JVC AV-27530 27" TV

1 Answer

Blurred Corners


hi there, its a decousing problem, look for the connection of the decousing which is connected behined the pic tube to the board. check some electronic parts, it may be temperature resistor, termistor, transistors, capacitor, etc.ty

Dec 25, 2007 | LG Studioworks 775N 17" CRT Monitor

2 Answers

Dark , blurry picture


MTNESTR, My guess would be the FBT loc.TH01(flyback transformer) Hitachi p/n#BW03004 which would be far less expensive than replacing the entire deflection board... A shop could ring test the FBT to confirm the failure. I do know the FBT in this unit has an internal resistor that is prone to failure. It is in-line with the focus block and if it's open it would explain the blur and lack of screen voltage to light the crts properly. The deflection board is about $290-$350 plus shipping and a FBT is somewhere between $60 - $90 depending on the supplier. Hope this helps! Bill

Jun 04, 2007 | Hitachi 46F510 46" Projection HDTV

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