Samsung CRT TV letters or text is shadowing

[JohnNovak]

Hi.
I have some problem with old CRT TV Samsung model: CW-29Z338T, 29" size TV.
The problem is that letters and other text are not clear, text or letters are shadowed on the right side.

I found 2 capacitors on CRT Picture Tube Board.

47uF/400V was leaking very bad, the second cap 10uF/250V was bad ESR reading so i replace this cap also.

Replacement these 2 capacitors did not help nothing.

I try to reduce brightness, contrast and sharpness. There is very small effect on this shadow.

To reduce G2 down have more effect but then picture is too dark no matter i can reduce brightness with remote.

Any solution for this problem?

Picture 1 is program Travel after the show was over.
Picture 3 is menu from external Combo SAT receiver.

[R_J]

try replacing C402

[JohnNovak]

Hi R^J.

I replace C402 and C404 both 470uF.
I also check both old caps are ok.

[JohnNovak]

It is interesting that when the TV is cold, there is some disturbance in the picture, which then disappears slowly. The shadow is still present.

[R_J]

I made a mistake on the cap, it should have been C422, NOT C402. C422 is a 47µf 250v cap on the 200v supply from the flyback.

Is this the S63b chassis?

[JohnNovak]

Yes the cassis is S63B.
I also suspect this cap but have no any in stock.
I need to order it and wait to come.

[R_J]

If you have another 10µf/250v you could just bridge the 47µf and see if it helps

[JohnNovak]

I replace C422 with new and does not help anything.
Old capacitor show good condition.

[R_J]

Check the voltages on the crt neck board to see if they are correct.

[JohnNovak]

Voltages seems to be correct.

[JohnNovak]

I also found one bad capacitor in vertical section, cap C307=100uF/50V was high ESR and capacity 88uF.
I replace all 3 caps, C418, C302 and C307.

[JohnNovak]

Picture is a little better, white shadows still constantly present.
When TV is cold i have some lines in the picture which appears and disappears in about 3 seconds interval and rotate from horizontal to vertical position and back to horizontal.
Line disturbance take about 10 minutes to rotate for 180 degree, it is rotate very slowly.
After 5 to 10 minutes when TV is warming up this lines are almost invisible.

[JohnNovak]

I check voltages from SLA1004, HC801
and i found 12V = 11.27V
It is a little low and also feeds crt neck.
Can this be the problem?