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Tube TVs

LG 21fj4a TV failure crisp image only subsumed having white color

Televisor LG 21FJ4AB

Televisor LG 21FJ4AB

Willys05
hace 5 años
hace 5 años
Good afternoon gentlemen again asking for help to solve this defect on this LG 21fj4a TV was a problem in the horizontal section and it is all ok the only defect is that the image runs a little from left to right to have white image and makes an interference every Once a bright image appears while you run a little, this figure is waiting for your valuable help and thanks in advance
nicomena2015
nicomena2015
9.501
hace 5 años
hace 5 años
hello colleague: try lowering the screen voltage a little .... look for the potentiometer q. It is at the bottom of the fli-bak ... and you turn it a few millimeters to the left ... the brightness will go down a little ... but the screen should be at a right point ... it can walk in the measured 350v in the socket of the tube ... if that does not work, it measures what tension you have on pin8 ABL of the fli-bak ... I must walk in the 8-15v .... comment ... greetings !!!
nicomena2015
nicomena2015
9.501
hace 5 años

try lowering the contrast from the remote control ... leave it at 60-70% .... and see if there is no longer any audio interference ...

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nicomena2015
nicomena2015
9.501
hace 5 años

that may be why, the tube exceeds its consumption when white tones appear ... or the vertical frequency gets x some point towards the lc501 micro jungle .. it can also be a deficient action of the ABL ... or poor filtration of tensions that come out of the chopper or fli-bak ... verify that ...

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El LInce
El LInce
11.610
hace 5 años

Hello, change the horizontal frequency crystal

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Willys05
hace 5 años

I have already lowered the screen as much as possible and in the same way follows the detail that the interference is heard with the white image when the image is swept from left to right

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Javier Chavez C
hace 5 años
hace 5 años
Diagram here: http://www.mediafire.com/file/02ri60hr3gijv5v/LG%252B21FJ4%252BChassis%252BMC-059A.pdf/file Check the good condition of the components in the entire AFC pulse line that leaves pin 10 of the FBT on its way to pin44 (FBP) of the jungle IC.
Willys05
hace 5 años

I keep tracking down if there is any altered component and commented on the ABL line is ok I go to AFC and I comment thank you

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Willys05
hace 5 años

Failure resolved gentlemen I appreciate your contributions to all because they are very valuable and comment that the problem was in the line of ABL with the capacitor c514 of 200v / 223pp curiously it was not filtering correctly and distorted the image by saturating brightness thanks to all

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Javier Chavez C
hace 5 años

Thank you for sharing the solution.

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luis tartaglia
hace 5 años
hace 5 años
Hi . Reduce the scrin a bit to see if it fails. If so, you must control the source first. or you put the tester in the + by without removing it from there see if it does not vary (decrease) in clearer images.
Willys05
hace 5 años

If friend already reduced the screen and the same way the defect persists
It is defect only appears with clear images example sea sky white letters etc. And although it is a screen, this bass always makes an assumption or clear image noise, I don't know if I explain myself in addition to the image running a little from left to right

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luis tartaglia
hace 5 años

You did not comment.
Reduce the volume to 0.
And comment if it continues ls or increases to see if it manifests more.
You don't comment on tensions. Without placing antenna you also have that noise.

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