Question about Prosonic Televison & Video
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Posted on Jan 02, 2017
It sounds like the entire screen goes blank with your problem. My problem is the lower half of the screen goes blank. Do you think the SSB is also the problem? What are your thoughts about the "Video Board" or the X Board?
Do you know where to purchase parts?
Posted on May 28, 2008
The power supply is in the protect mode. There are many things in the set that can cuase this. Most likely there is a short on one of the circuit boards, or the power supply itself has failed.
You will have to have the set serviced in order to get it going again.
Posted on Jun 03, 2008
That's a fairly common indication that a component in the main power supply called an 'electrolytic capacitor' is fading away.
These are used as filters and in feedback paths in switched mode power supplies and one of the parts on which mfr.'s safe a nickel or two. If these parts are not rated for the type of service they perform (higher frequencies and ripple current) they chemically break down and lose value until they no longer can serve their purpose.
If you open the back of the set after allowing a number of hours (overnight is better) with the plug pulled, look for a smaller circuit board with larger than average parts. Some of these will be blocks (transformers and chokes) and it will have cylindrical 'cans' that are mounted 90 degrees to the board. Look for a part number which may be on a sticker. If you can find this, contact Panasonic service in your area and ask about repair or replacement cost of this board. If either causes a faint heart, check on the site below to see if they happen to have this board on hand, it may save some money:
Subassemblies are normally plugged in and won't require soldering to replace.
Posted on Mar 19, 2010
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