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How should i repair onida igo tv yellowish colour problem with eht sound?

Have a problem of continuous yellowish color & flicker sound in eht

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: onida stand by problem

sir my onida tv 21'' ineed un lock

Posted on Nov 20, 2008

SOURCE: ONIDA CZR-20 Intermittently change TV

the crt socket may be bad or crt board may have loose connection or chroma and or microprocessor ic has poor solder joints good luck

Posted on Jan 21, 2009

Shuttle83
  • 1139 Answers

SOURCE: Green Display Problem

Hello vinodquilon,

The problem you described is more then likely related to the video processor. Possibly also some power supply issue, since the audio section is being effected also. Or this may be two unrelated problems in that case the video processor and the audio processor and amplifier should be suspect. This is how I would handle this problem:

1) Get the schematic for this TV

2) Tackle the video problem first
a) Locate the video processor connect a known video source generator (I use the Sencore VA62A) and take voltage measurements and compare them to the schematic values (For red, green, and blue), if the values are not as they should be, use and oscilloscope to look at the waveforms of the video section and compare them to the schematic values if they are not as they should be, change out the video processor. Retest the TV, this should take care of the video problem.

3) Tackle the audio problem
a) Using the audio section on the VA62A inject a 1000Hz tone into the TV and using an oscilloscope check the input to the audio processor and the output of the audio processor if you do not see a 1KHz sine wave on the output check the voltage levels and compare them to the schematic, if they do nor match change out the processor, if they do match and you see a 1KHz sine wave at the output of the processor, then check the input and output of the audio amplifier stage in the TV if there is no audio at the output change out the amplifier.

This is a good starting point, now I must be frank with you, I run a TV repair business and I do understand that you may not have , Video Signal Analyzer or Oscilloscope, and Video/Audio Signal generator, or even a multimeter to do this job correctly, so since I have told you how I would do this job and you can follow the instructions given and solve your problem, Let me advise you on what you should do,

If I were you and did not have the above equipment nor experience in electronics, I would take the TV to a qualified TV repair center and have it fixed there since they would have the necessary equipment to do the job properly.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Posted on Jan 21, 2009

  • 126 Answers

SOURCE: After TV turned on for 2-3 hours the colors begin to change

The light engine is going bad. To be specific the color wheel is wearing out and cannot be replaced seperately as it's part of the light engine. Mitsubishi extended the warranty on the light engine for an additional two years. You need to contact a local Mit's authorized service center to see if yours is still covered. Better hope so as the light engine is expensive.

Posted on Jul 09, 2009

  • 63 Answers

SOURCE: My SONY tv KV-XF21M80 produces a continuous sparking sound

The tech is very likely correct. The EHT or flyback transformer can develop hairline cracks that allow leakage of high voltage that exists in this circuit. There are other related components that can also cause this, but the transformer is the most likely. This area in the set also builds up allot of dust also due to the high voltages and this aggravates the issue. I do not recommend operating the set very long this way as it may begin arcing inside and cause more components to fail. Replacing the part would depend on how much you want to invest in the unit. Get an estimate and go from there. Good luck.

Posted on Nov 25, 2009

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What's your question?onida oxygen thunder 21 inch TV EHT ok still filament not glowing


If EHT is OK; LOT is working fine, and the filament should glow. If not, check the continuity of the filament. If it is OK, check the continuity of heater winding of the LOT.

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NO PICTURE OR SOUND 6 BLINKS REPEATIONG ON RED LED STANDBY NEXT DAY TV WILL WORK BUT ONLY AFTER IT HAS BEEN LEFT OFF FOR SEVERAL HOURS.


after 4 or 5 yrs EHT ( transformer that supplies voltage to CRT TUBE - TV TUBE ) becomes weak - then 1 of the indication is that it takes few seconds time to start [ after few days it takes few hrs to start (your case) & then finally stops completely ].............. .......so solution is EHT ( also called as flyback transformer ) should be replaced....... {{ few details about EHT---- its size will be around 3inch X 2inch X 2inch ---it will have 2 or 3 knobs to adjust focus , brightness ------ at bottom around 10 pins will be there ------- from EHT 1 thick red colour cable goes to CRT TUBE --------- on EHT its part number will be there }} -------- so if user is a technical person having idea about components ( resistors, transistors, diodes, etc ) , having tools like multimeter ( to check components) , soldering iron, soldering lead, flux, desoldering wig ( for removing components), etc also little experience in servicing field( compulsory) ----------------- then user can remove EHT from main board ---- take to electronic shop ----- buy same type EHT --------- fix to mainboard ( knobs on EHT should be adjusted according to picture --- after switching TV --- this adjustment is very important ) ----------iam from bangalore --- here EHT's price will be around Rs 250 ( US $ 6 ) & for my customers (in bangalore) i will take another Rs 500 (US $ 11) as service charge......i don't have any idea about EHT ' s price & service charge in your place.........since it is very risky job i suggest to contact TV service engineer ------- because they are highly experienced & can fix this component very easily. ------------ [[ sometimes along with EHT another component called transistor ( big in size - situated close to EHT - it will have 3pins - its size will be 1inch X 1/2 inch X 1/2 cm --approximately ---- black in colour ----- fixed to aluminium metal ) --- will also gets deffective --- so this component also should be checked ]] ---- in your case this transistor is good ... because when this component gets deffective then TV won't get '' ON '' .............so in your case only EHT should be replaced.........100% it works normally .....GUARANTEE....... vishnuswamy_4.jpg

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Onida stand by problem


sir my onida tv 21'' ineed un lock

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