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Red Color Problem In CRT TV

By on July 3, 2013

I have got a problem with  Jumbo  CRT TV chinese make model No. KB210 51 cm. It displays a red faint colour with many lines from top to bottom. The sound is ok except the picture problem.


It could be the red transistor or the red gun in the tube have problem. If the red gun is shorted in the tube the lines will appear. I suggest that you compare the Green and Blue driver transistor voltage/waveform for reference. Any differences in the signals indicates that you should troubleshoot the area. Using an oscilloscope  will me much easier to see as compare to voltage.




  1. shibsankar maity

    April 1, 2017 at 9:55 pm

    lg tv pink color problems.picture tube base open R G B volt ok.but base canection badme r g b volt problems

    • Jestine Yong

      April 3, 2017 at 9:23 pm

      Hi Shibsankar,

      Have you tried to adjust the RGB vr? What about the OSD menu setting? If all the RGB voltages at the CRT board are good this could suggest a weak tube. Have you tried run it on a color test pattern to see which color is weak?


      • Rahul kumar

        March 23, 2018 at 4:06 pm

        hii sir mi colour tv folt this not missing red colour

        • Rahul kumar

          March 23, 2018 at 4:07 pm

          mising red colour

  2. longlise

    June 16, 2017 at 10:41 am

    sir there is always pink color in
    my colour TV how can I repair please help ur help will be very useful for me .

    • Jestine Yong

      June 17, 2017 at 2:12 pm

      Hi Longlise,

      May i know what have you checked?


  3. Aniruddh Bhagat

    October 5, 2017 at 7:35 am

    my lg crt tv it shows only reddish picture. I have changed the 6107 but problem not solved it displaying red color again...

    • Jestine Yong

      October 6, 2017 at 3:10 pm

      Hi Aniruddh,

      Reddish can be the problem of weak picture tube, eeprom data corrupted, bad components in the CRT board and etc. Without hands on assessment I would only be guessing only.


  4. Excellence Emmanuel

    December 15, 2017 at 8:29 am

    please sir,
    my CRT is behaving funny,
    when I power it on, it displays full colour for a moment, then fades to monochrome.
    what could be wrong with it?

    • Jestine Yong

      December 15, 2017 at 10:31 am

      Hi Excellence,

      Probably dry joints, loose connection in the crt board bad, jungle IC and etc.


  5. stanlet

    December 31, 2017 at 2:14 am

    I have a CRT tv it has a blurred image with dark coloured shades so image isn't clear at all more so the red colour is too much Wht could be the problem

  6. Vaibhav Vats

    January 30, 2018 at 4:31 pm

    My crt TV doesn't show red colour. How to repair electron gun of picture tube?

  7. Prem

    July 8, 2018 at 7:35 pm

    Hi,my crt tv sony trinitron having a issue of blue colour missing.I have checked voltage it is very low compared to other colour cathodes.Driver voltages 3.5v(blue),1.7v,1.7v respectively.What could be the issue.Can we check picture tube cathode.I heard shorting cathode with ground will confirm faulty cathode.Is it right?please help.

  8. Paakodie

    July 19, 2018 at 11:43 am

    my Panasonic coloured tv turns to yellow colour when i watch it for about 5 hours. what could be the problem.

  9. Sam

    September 15, 2020 at 11:25 pm

    For blurry image, I solved by changing the G2 capacitor on the RGB BOARD. it was B122k 2kv but I used 222k 2kv ad worked just fine.

  10. Natraj rajgire

    July 5, 2021 at 3:55 pm

    My sharp crt tv green color 3 hours late display picture


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