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sansui crt TV vertical deflection problem

Discussion in 'Troubleshooting and Repair' started by mark Jones, Nov 9, 2016.

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  1. mark Jones

    mark Jones

    2
    0
    Nov 9, 2016
    Hi sansui sv 2118i m28 using la 7840 vertical ic. The vertical deflection expands slowly when switched on changed all electrolytic caps replaced ic the picture has a 1cm gap at the bottom when fully expanded- any help will be appreciated!!
     
  2. shrtrnd

    shrtrnd

    3,795
    503
    Jan 15, 2010
    Do you see any observable heat damage to components or the board?
    Take a look at the power supply board too.
     
  3. mark Jones

    mark Jones

    2
    0
    Nov 9, 2016
    Thanks!! for ur quick response. The chassis in relative good condition no heat damage. It starts with half full picture on top then epands at the bottom until icm gap at the bottom there is Light diagonal bars running down the screen - the channel program dissappears now and then leaving a blue screen comes back when u change the channels
     
  4. Atheros

    Atheros

    13
    0
    Oct 22, 2016
    Can you post some pics of tv screen and the components ?
     
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