Question about Televison & Video
The TV (which is old school) turns on fine, and works normally. Then after about 20 minutes or so of watching, it will go to snow screen off and on for about 10 seconds and then the screen goes black. Sound does not work either after the screen goes black. What part of the internals should I suspect to be at fault?
Additionally, I've had the TV for quite some while (pretty sure since new) and I am capable of fixing, just don't know what to expect when I pull off the back case. Thanks in advance.
The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
Posted on May 16, 2017
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Posted on Jan 02, 2017
Hi, IK circuit is engaging which basically means the picture tube is getting tired, the only "fix" is temporary (may get another year out of it). You have to increase the "screen control clockwise".
Remove back of set, follow large black or red wire attatched to picture tube down to the flyback transformer, mounted on flyback are two black controls, one is focus (leave it alone) the other is "screen", adjust it clockwise approx. 1/4 inch, remember that this is a high voltage circuit so use one hand in the set the other hand out of the set at all times,any questions ? e-mail me back, good luck, BMW Rider
Posted on Feb 27, 2008
SOURCE: Sony Trinitron kv-27HFR blurry
the picture tube is gone.
i repaired 150 sony xbr and kv series with that problem.sony has a single gun not three and has a great pix,but burn out faster.
there is a main screen control that you can adjust ,but the tube is gone.
on the back of the crt there is 3 gun drives r g b .
turn the color all the way down so it is black and white.
if there is a green ore purple tint,one gun is out of balance.
ajdusting the r g b controls so that black and white is normal is what you want to do.
the crt board has the screen bias voltage 800volts on it so be very careful and use an insulated screwdriver to adjust the drive controls.
Posted on May 13, 2009
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