Question about Sony FD Trinitron WEGA KV-20FS120 20" TV

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Blinking picture and bars running on diagonal

Blinking picture, began as occasional now all the time. also bars running on diagonal,

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A common cause is a short in the electron gun inside of the CRT neck. This is not fixable without changing the CRT. The CRT is terribly expensive to replace if it was available.

A less common cause is a failure in the HV multiplier. This is part of the flyback assembly. Changing the flyback assembly is taking a gamble to see if the fault is fixed this way. There can also be some other support components that will have to be changed.

Considering the age of the set, I would not invest any money in to it.

Jerry G.


Posted on Jan 17, 2009

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The power light is red and blinks and beeps. I have no picture or sound. I was watching the set and it just started doing this


How many times do this standby/power light blinks at one time switch ON? Count it. These blinks are fault indications, and are called blinking codes. By this number of blinks, you can get an idea about the faulty circuit stage inside the TV. If you wish to get more details about these blinking codes, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by its left side bar, or view it in Timeslide option.

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are they horizontal or diagonal? if they are diagonal it could be you're brightness is turned up too high. try turning it down.

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Can not turn TV on. The standby light shines but nothing else lights up. No picture tube light.


the set having self diagonize function the system detect the error and gose to standby mode but number of blinking shows the error code and blinking code can be download form the net

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2 Answers

Fine interference lines running diagonally across picture.


Hi There,
Sounds like your Horizontal Output Circuit is leaking current causing diagonal lines across the screen. I hope this will help and thank you for using FixYa!

Mar 29, 2009 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

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Good day.

You are getting an intermittent performance for your unit. One reason for this might be with the loose contacts on the high voltage section of your unit. Have it resoldered.


Regards,


chris

Aug 19, 2008 | Sony KP-48V90 TV

1 Answer

Diagonal green lines on a green screen


It is possible that the electron-gun inside of the CRT is having an intermittant short. It is also possible that there is an intermitttant failure in the bias or drive circuits for the CRT electron-gun.

The TV service tech would have to run some tests to determine the actual fault, and then the failed components.

If the CRT is at fault, the set will not be worth to service.

Jerry G.

Apr 25, 2008 | Standard (CRT) Televisions

1 Answer

Blinking and bars in background


check capacitors located at horizontal section.is there any popcorn sound?post back.u

Apr 22, 2008 | Sony FD Trinitron WEGA KV-20FS120 20" TV

1 Answer

TV picture won't stop blinking


Sounds like a bad solder joint or leaky capacitor. What make and model set do you have.

Jan 11, 2008 | Standard (CRT) Televisions

1 Answer

Sony Trinitron KV35V36 Blinks Every Second


Picture blinks on/off and audio is still there?? If so it's the crt and a common thing for sonys to go out like that.. You can lower the G2 voltage a bit and that might help for awhile or have the tube rejuvenated by a technician - but either idea is only a temporary fix...
Sorry
Bill

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1 Answer

Power light blinks and no picture


No picture - screen is empty. Sound is ok
Check IC101 (BA7630F), if video signal comes to input (pin 1) but not present at output (pin 14) then replace this IC
No picture and sound, only a high pitch sound at switch on
Remove horizontal transistor and measure the resistance across any two pins. This value should be no less than 200ohms
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Faulty joints on CRT pcb. Cracked solder joints at tube socket connections on CRT circuit board. Caused variable supply to CRT heaters. Resolder all socket pins to pcb.

Nov 24, 2007 | Toshiba CZ36V51 36" TV

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