Question about Sony FD Trinitron WEGA KV-32FS120 32" TV

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Sony KV-32HRS10 It has a sound,but not picture.Powers, screen are ok.,but the tube without its board,has a high tension in all the pins.I tested with the cable of the multimeter.Is the tube damage? Thanks.Walter.

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  • scottokey Dec 05, 2009

    sony trinatron no picture standby light continuly blinks red


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I need more info. Sound ok but no picture? Do you have displays? (Vol bar, chan #, etc).

Posted on Mar 01, 2008

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How can I turn the screen voltage up?

from description you are on the right track--screen con inside will either be on the crt circuit board or on the high voltage transformer, on or the other--lots of the older Sony sets when the picture tube gets weaker need this done.

Dec 15, 2012 | Sony KV-32S42 32" TV

1 Answer

White lines on the screen.sounds ok.picture is coming behind white line.

Lines means Screen Drive is overdriving, try adjusting the Screen control on the FBT flyback Transfomer, adjust it down. If that does not Clear out Problem then replace the CRT Board that is connected to Picture Tube.

Jan 22, 2011 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

I purchased my Sony KV-35S66 in Dec. 1999. The screen is black when I turn it on. Sometimes, it will show the picture for about 45 seconds, then it disappears. The audio is fine. Have the picture tubes...

No,this tv is fixable.The video board,that the board,that connected to the CRT (Tv Tube),those round pins holes that connected CRT sockets that hold the CRT(Tv Tube) and the video board together.Resolders those CRT pins sockets that connected on to the video board.Will solved the cold solders connections between the CRT pins sockets and the video board this problems,will be solved.Tries take it to a tv shop,ask them take the tv aparts,resolder the video board CRT pins hole sockets on the video board for you.The priced my guest about $35-40.They must,take tv cover out and resolder the vdieo board CRT pins holes sockets.The whole job,take about 20-30 mins.

Oct 28, 2010 | Sony KV-35S66 35" TV

1 Answer

My sony tv model no.kv-32fs100 screen goes black sound still on

If your TVs sound is Ok, and there is no picture means there is some fault in the horizontal output section inside the circuit bord of your tv. No Extra High Tension Voltages are generated in it. It may be due to Horizontal Output Transformer, usually say as [LOT], or its drive circuit, or line drive transformer failure. You can check if [EHT] that is Extra High Tension Voltage is genrating inside your TV or not.
Place your forearm parellel to the outer surcace of the picture tube, at about 2cm apart from it, and switch on your TV. If there is EHT geterated inside, the hairs of your forearm will be attracted towards the surface of the picture tube, and you can feel it. If it is not, there will be no attraction.
[1] If it is:- there is no screen voltage is coming to your picture tube. In most of Sony TVs the screen voltage is coming from one point in the printed circuit board, and its adjustment control is placed on the base card of the picture tube. Focus votage and screen voltages can be adjusted.
[2] If it isn't:- Your TVs LOT mentioned above has got damaged. LOT damage is is a general case in all TVs. Some times the driver transistor which drives the LOT also may also get damaged.
You just unplug your TV from wall socket, and open its back cover without damaging anything. Point out the horizontal drive transistor, usually can be seen very near to the LOT, screwed into a heatsink metal. Without touching any inside part, power on your TV. Wait for 2 minutes or so. Just power off and unplug it from the wall socket, and touch with your bare had on the transistor heatsink. If LOT is shorted, the transistor will be very hot during this time, and an "Ishhhh" sound also will be heard. If you have sufficient equipments, desolder and take out the horizontal output transistor mentioned above, and check it for collector to base leak. If it is leaky replacing it with same type and number will solve the problem. Anyway it should be replaced along with LOT replacement. Therefore just do it first. If the replaced one also overheats, surely LOT is damaged and it should alo be replaced with same type and number. If there is no heat in the transitor and if no hissing sound is heard from the LOT side, check for its [LOTs] supply voltage. It shoud be around 135 to 140VDC in 32" Sony sets. If there is no voltage, just track the circut print for any crack or have any series resistor failure.
If there is supply voltage to LOT and still it seems not working, come towards the Line Drive Transformer. It is a small transformer can be seen on the circuit board diretly soldered to it. If its winding gets opend, there will be no frequency [15625Hz] to drive the Horizontal Output Transistor. For all these checks you must have a multimeter and a soldering iron in hand.
Please remember how the TV was shut down. If it is during on working, and a sudden faulure it was, surely LOT is faulty. There is no doubt about it. Anyway take precautions before opening the back cover. Keep children away from you and let an adult beside you too. As much as 27KVDC [27,000VDC] points are there inside your tv. It is dangerous to touch. You can see that voltage wire, which comes from the LOT, and connected to the top side of the picture tube, seems to be sticked with a rubber boot to it. Never go nearby its side any part of your body.
you must have some skill, causiousness and more patience to do this work. Otherwise get help of any experience technicians for this job.
If you feels any difficulty; please inform to Fixya, and they will give me alerts. I'm here thousands of miles away from you and trying to solve your problem by understanding from some words of yours you remember. Anyway wish you sucess. Take care.

Oct 21, 2010 | Sony FD Trinitron WEGA KV-32FS100 32" TV

1 Answer

Sony trinitron television , when you turn on it takes awhile for the picture to come up on screen and when it does the screen constantly blinks

Three possibilities
First it sounds like your Tube EHT ( Extra High Tension) power supply is failing.
CRT TVs need a high voltage around 30K for the tube to work. Whcih is generated in the set, if you hear clicking sound like arcking this will confirm it. Unless you are familiar with HV electronics you should not attempt to fix it since it can be dangerous.
Second possibility is the picture tube is failing.
Third possibility is there is some problem with the video circuits, to check this try connecting a VCR or a DVD to see if the picture is OK. If it is, the problem is in the video circuits.

Feb 15, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

2 Answers

Sony kv-32fs10 won't turn on...stand by light blinks continuously

No,ur power ic board converter is dead.
U need a new one.U know some Electronics repairs,open it take off the board where near the A/C cord plug in is use the parts numbers buy it from the Web.replace it that might work, if only the power prob.nothing else.

Aug 19, 2009 | Sony FD Trinitron WEGA KV-32FS100 32" TV

1 Answer

No picture, sound works on Sony TV KV-27V22.

try to adjust the screen. it is located behind the CRT board.(CRT board is the board that attached to the picture tube) you will find a black knob which label screen adjust it by turning the knob.

Jul 04, 2009 | Sony KV-27V22 TV

1 Answer

Green screen and distorted picture sound is good but no picture

It must be connected with the color circuit of your tv, a board connected to back end of the tube. Could be dust, cob web or carbon deposit shorting a transistor. Popping noise if loud enough can be attributed to high voltage circuit fault and picture tube.

Have it service by a qualified person.

Apr 04, 2009 | Sony FD Trinitron WEGA KV-27FS120 27" TV

1 Answer

Sony KV36H5500 WEGA TV (flat screen tube) will not turn on

Pull the back Off Disconnect CRT board connected at End of picture tube then turn set on and see if it comes on with volume, high voltage you can feel front of tv for static elect.... Let me know what happens then i can tell you what is wrong with TV.

Dec 27, 2008 | Sony KV-32XBR85 TV

3 Answers

Sony kv-36fs10

My picture would go out after several minutes but I still had sound. I took the rear cover off and blew all the dust off with compresed air.I did this for a few times over several days nothing happened.I also took off the rear circuit board that attaches to the tube with a round pin socket and blew that with compressed air and put it back on. The TV has now worked for two days without the picture going out. It worked!!!!!!!!!!!!!!

Jan 10, 2008 | Sony KV-36FS100 36" TV

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