Question about RCA F27667 27" TV

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RCA 27" F27189ET HOME THEATRE - No picture

The picture on this set is now a vertical line in the middle of the screen with a sliver of the picture showing. Sound works fine and can change all the channels. Does this mean the picture tube is done for? And is this worth fixing?

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  • pulsar gtr Nov 20, 2007

    Hi Guys,

    I have the same TV with the exact same problem where I have a vertical line in the middle of the screen from top to bottom, I was wondering if you have fixed your TV, and if so, what component did you replace in order to fix it.
    I can be reached at rafi2247@rogers.com

    Thank you,

    Rafi

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Is unlikely the picture tube is bad,the description of the problem tells me you have a straight line from top to bottom that is an indication of a horizontal deflection problem and is correctable and inexpensive,just in case the line you mention goes from side to side the problem will be in the vertical circuit and is also repairable.To make things easier tap the set on the side just to see if it reacts,don't over do it ,if it does the should be a lot less expensive because it might just be loose conections.Be safe and call for assistance.

Posted on Sep 29, 2006

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1 Answer

Television has sound can change channels....but has no picture just a thin horizontal line in middle of screen


Hello
The vertical sweep section of your TV is faulty. It may be either to a loose solder points at somewhere in that section of to the fault with the vertical output IC. Check all the solder points on the vertical output section of your TV. It is best to resolder most of the suspected soldering points, by applying a little more solder, without making any solder bridge short in between adjecent solder terminals. If this does not help you, replace the vertical output IC with same type and number. OK.

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I know the line is horizontal but the problem is in the "Vertical" circuit of the set that deflects the picture from the middle of the screen to the top and bottom.

Only a few easy possible reasons for this.

1) set has developed bad solder connections in the vertical output circuit--it happens as a normal thing and most sets like this the picture will have opened and closed before going to just a line.

2) a part in the vertical output circuit is bad---most common is a IC chip for output. Not real hard to get at or replace and is inexpensive.

If it is as stated here a 27 inch set it may not be economical to fix and cheaper to just consider replacing it.


Let me know if you have questions.


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Hello,
Sounds to me you have a cold solder joint ( loose solder connection ) on the printer circuit board around or on the vertical chip or on one of the vertical capacitors. You may also have a bad vertical chip or a bad vertical capacitor, but I doubt it since it did come and go. I'de get a soldering iron and some solder and touch up the connections. I will remind you that you need to always excersise saftey by making sure, before removing the back, unplug the TV from the wall, and use care not to come in contact with the large red wire going to the back of the picture tube as the picture tube can be turned off and still store lots of voltage ( up to 35,000 volts). Always stay safe and when soldering, use care not to run solder across places that will make a short.
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307-266-4675

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Look for bad capacitors in the vertical deflection amp, and in the pin amp sections. This is common on most of these types of TV sets.

The caps tend to go high in ESR with age. It is best to use an ESR meter to find the bad caps. It will be a lot faster than workign out waveforms with a scope.

Wikipedia explanation about capacitor ESR:
http://en.wikipedia.org/wiki/Equivalent_series_resistance



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1 Answer

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