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Bottom part of the screen cut off

My sony trinitron tv screen has moved down, I don't see the the figured at the bottom line. I guess I gotta go to service mode and adjust the vertical height. Please tell me the code to get to that point.

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  • Master
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If the vertical of the tv moves when it is that old that is your first warning sign. All electronics need their electrolytic capacitors replaced (especially the small ones). Not replacing them will cause a catastrophic failure. The next sign you will receive is when you have lines every half inch across your screen. Or the next sign will be losing your vertical entirely until all you have is a line. Then everything will go poof till only a standby power light will show. Pressing buttons in a secret pattern to get into the service mode will not fix failing.

Posted on Nov 27, 2013

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Posted on Jan 02, 2017

techman
  • 3130 Answers

SOURCE: Sony TV - Loss of half the picture

sarge, it sounds like the vertical output IC went bad on you. If it was a bad connection or a bad capacitor, your picture would have been a straght line across the screen. They call the output section of the IC a push-pull type of amp, so the top half of the sweep IC went out. If you have had some soldering experience, and or experience with solid state repair, locating the bad IC and replacing it is no big deal. If you havent, stay safe and call in a pro to assist you in this repair, as there is alot of high voltage inside this puppy that is still present even if the set is unplugged. It should not cost an arm or a leg to repair this set. An honest repair on a set like this if you take it in should not exced 125 to 150 bucks. Good Luck PS Please dont forget to rate this thread.

Posted on Oct 22, 2006

jerryg50
  • 1667 Answers

SOURCE: Need to center the picture

This is a defect in the vertical scan amplifier. It is not an adjustment. Most of the time there are a number of capacitors in the vertical deflection amplifier that can cause this type of fault. Sometimes the output drive IC can cause this fault, but more rarely.

An experienced service tech can locate the defective parts and replace them. The average time involved is about 1 to 1.5 hours.

Jerry G.

Posted on Jun 02, 2008

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