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Anonymous Posted on Jul 07, 2014

Rca 27v412t tv picture only in middle of sceen

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  • Toshiba Master 76,851 Answers
  • Posted on Aug 18, 2016
The Knight
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It is the fault with some components related with its horizontal scan output section circuit. Just check the circuit part; and check the components I've marked in red here by its horizontal scan output circuit. Beware; you're going to touch the most dangerous part of its circuit. Keep it in mind always.

rca 27v412t tv picture only in  middle of  sceen - 24780559-dmive0z32bcpzrsafcaw1enm-4-0.jpg If you wish to see the circuit diagram in full; visit
http://schematicscom.blogspot.com/

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RCA Model 27V412T Trying to fix the screen size. The edges are cut off

When the picture gets smaller that means the high voltage being applied to the picture tube is failing. The flyback transformer and the horizontal output transistor are the likely parts that fail. Power supply capacitors that have domed tops are suspect too. Parts and labor for a TV that old may surpass the price of a new TV.
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Can you see a picture at all or is it completely bright red? Is there sound?
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Im looking for the manual for my RCA 27V412T

You can view or save your manual from this site to view in PDF or print if so desried.

http://tv.manualsonline.com/manuals/mfg/rca/27v412t.html?idRes=11396722
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ok! change all tact switches! your tact switch has abnormal resistance! thats why your tv is changing system!
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