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RCA 27 tube tv...half screen is fine and half screen is all black lines

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Vertical problem,possible ic and caps

Posted on Aug 25, 2008

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Posted on Jan 02, 2017

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1 Answer

Only half rca tv screen shows up


I think you may have a tv tube problem...

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JVC TV 27" Black line on top of screen


This is for the original problem.. Not the second post.

It's a problem in the horizontal deflection circuit. The parts will be available, but you will be in for some daignostic repairs also to find out why it failing or if it has failed on it's own.
There should be a few caps near the IC (an LA7840) that could also be causing the problem. Click the link, it will make it easier to locate the part inside.

This is the kind of repair best left to a TV tech, but get it done now and it won't cost anywhere near as much as it will later.

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check these two resister also R19702= 750k, R19703= 750k

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replace video ic on Green CRT broad,also look for leaky capacitor on same broad replace it also, If this does not fix it then you have a bad green tube!

Nov 29, 2007 | RCA HD52W59 HDTV Projection Television

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RCA 52inch TV


If the screen control for the green picture tube is set too high, then the colors will be greenish, there will be green where there should be black and there will be fine curved lines (retrace lines) in the picture. If you feel confident then you can open the set and look for the focus block which has the 3 focus and 3 screen controls. One row is labeled Screen and the green control will be the center one. Try turning that control down a little and see is the green background and curved lines go away. If they do not go away then there is something more serious wrong. If you do not have experience working on projection sets then allow a qualified tech to handle it for you.

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1 Answer

Vertical Green/Purple Lines on lower half of screen


I would contact RCA if the repair center dosent know how to troubleshoot this set. But I bet its an eeprom or ground issue. Contact RCA here at 580-634-0151 or At https://www.rca.com/secure/service/contactrca/1,,,00.html Good Luck

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