Sony FD Trinitron WEGA KV-21CL10 21" TV - Answered Questions & Fixed issues

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://homenol.blogspot.com/ http://electronicshelponline.blogspot.com/ If blinks continue without any pause, the main board is faulty. Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

http://www.nodevice.com/manual/Sony.html

Id try ebay or thefind.com you may get lucky and they will suggest a substitute. Radio Shack may also. How do you know the transistor is bad?

Check all the solder terminals at its video output card;[CRT base card]. Check the soldering of the CRT base socket. A dry solder joint or an open color output transistor can cause this fault; provided the picture is there. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ The fault is technically called 'one color predominant screen'. Use this keyword to search the site.

first check main card and then check fuse .if fuse is blown put new one amp fuse.af set is ok leave it .if not work then chcck seitching transister and S.T.R 6007and oo120volt zenner diode.

I never could get my service manuals for free. In my days I even had to prove I was certified by Sony to repair their Triniton TV. I can't find any Trinitron service manual and I discovered recently I even lost my PDF copies. There used to be some east European sites with manuals, but I think "security" from NSA is blocking everything coming from there. Sorry I can't help now. Ill keep looking, because I want my PDF's back.

Check the speaker/s first. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power led, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating, to many popular brand TVs and other devices. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/ Blinking codes details to many popular brand TVs are given

If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. Circuit diagrams are n PDF, and cannot include here by this window.

These horizontal lines are vertical flyback lines and would indicate one or more of the tubes cathode drive circuits are defective. As the picture is predominantly yellow this would indicate excessive drive to red and green guns. Check the red and green video output stages especialy any clamping diodes.regards from Vintie

http://www.servicemanuals.com.aspx/

HiPlease do not dessolder anything before a thorough test. You should first check the main fuse. If it is blackened the MOSFET switchinhg transistor is probably bad and need to be replaced. The test should then go on thorugh the output line voltage in search of shorted components. Only when the fuse is clean but open (interrupted) you can replace it and plug in the tv set and test.Be careful and follow safety instructions on dealing with high voltage section of tv set. High voltage is letal.I hope this will help you,Sully

check the color drive, and resistors that change value or open, check also the connections

Hi,
In this situation as I don't know what adjustment item has been changed, go to service mode and press 5 and 0 on remote. This will reset all adjustments data on factory default. press mute and zero to write on memory. I want to inform you that after above procedure, you will have to adjust Horizontal, Vertical picture size and pin amp adjustments to get normal picture.
Good luck.

Check this link to download the user manual to your Sony TV. It has all details.

count the blinks on the power light--most will have a error code where the power light blinks a specific number of times---does not point to a specific part but indicates what area problem is in.

Details can be had from its service book. Download it from net.

Sir I think there is a missing part in the part number of the str can you give me the complete part number thanks.

Use a deguassing tool to clear the picture tube in case there was a failure of the deguassing posistor or a lightning flash. If there is no result the fault can be related to a failure in the colour processing section.

This can be the Luminance /Chrominance IC or a simple dry joint. Check the colour system settings( be it PAL/ NTSC/SECAM) before you open the set.

There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.

Thank you for using Fixya.

solution
step 1 : Now at first test your fly back transformer
step 2 : A.C. transformer out put voltage test
step 3: Vertical yoke coil adjust