Picture distortion Combination of problems: Blew power fuse- corrected with new fuse Set still cracks periodically and all power disappears, after a time set will turn on. Last time the set cracked and power returned the picture was and is still distorted, picture is too large for screen and has )( effect. Picture color and quality still excellent. Too large to transport so need to trouble shoot here. Any suggestions

If one or more of the color components of the picture is also distorted in a bow-tie shape, you have a blown convergence amplifier module - the fuse went when the amplifier melted down. This is a common failure in CRT-type rear projection TVs. The modules are black plastic slabs about 3" wide by 1 11/16" high by 5/16" thick with 22 pins on the bottom edge (more or less, depending on version). They are marked STK392-nnn, where nnn is a three-digit number denoting the specific version. There are two of them, and they will be bolted to one or two flat or finned metal plates to dissipate the heat they generate. Sometimes when they go out, they also burn out some resistors in the convergence circuitry nearby on the circuit board.

If you don't have to replace any resistors, you may not need to readjust the convergence on the set after repairs, provided you don't try to adjust the convergence beforehand.

The part price is generally between $12-$35. Avoid the cheap Chinese no-name knockoffs - they don't last. The major brand supplier of this parts family is Sanyo.

On the other hand, if you just have a minor misalignment, this could have been caused by a mechanical shift in the optics when you dragged the set away from the wall to get at the fuse (if you went "bump" - "oops!"). The problem can be corrected electrically using your remote control - see your owner's manual for the front panel and remote control combination code to get into convergence adjustment mode. Be careful to keep the convergence dot spacing uniform across the screen or your picture will be misshapen, work in small increments, and keep in mind that adjustments in one part of the picture affect convergence elsewhere. If an attempt to adjust the convergence results in no adjustment (you can't move the dots of one or two of the colors) stop - you do have a bad part. Attempting to adjust convergence with a bad part will make a lot of extra convergence adjustment work after repairs.

Your convergence ICs have shorted out. I have a tip at http://www.fixya.com/support/r4220499-change_projection_tv_convergence_ics which explains the problem, how to correct it and where to get the parts. Let me know if you need more help. Thanks for using FixYa and for the generous rating.

hardrocko

The fact that you continue to have sound while the picture disappears points to one of three potential issues.

Issue 1: the LCD Panel.

Issue 2: The Inverter Power Boards (though these tend to cause power/shutdown/no video at startup than video distortion)

Issue 3: the Time Control Board - a small board at the top of the LCD panel on the back that relays data to the rest of the screen.

Any one of these three repairs, you should call Sony if the unit is outside of manufacturer's warranty. They are expensive to perform, and the parts are not cheap. Hopefully you have an extended warranty to help with the issue.

MOVING CAUSES. ITS A GOOD CHANCE THESE BUMPS CRACKED THE CIRCUIT BOARD. ALSO IF THE TUBE IS BROKEN, LOST ITS VACUUM.

Yes, thats correct.
If lcd tv screen got hit by some thing then lcd panel got cracked and does show distorted lines or cracks instead of picture and lcd panel have to be replaced that would cost you 70% to 80% of new tv price.
New TV is better option.

Try turning off power and let set cool completely. Then turn back on. Letting it cool complety re-arms the autmatic degaussing circuit. It may take several cycles to completly clear it up.

Blew the dust out and pressed on all the wire connections to circuit boards and when I turned it on it powered up. I will clean all connections and check for bad solder. I bet if I move the set the problem will return.
P.S.-Brother has the same set doing the same thing.

Projection sets have two very common problems.

The first common problem is convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

The T.V. has a problem on the convergence panel Bd. Check each of the resistors near each regulator transistor. You can send the panel to P.T.S. Electronics in Indiana for repair. Call 1-800-844-7871 and they can repair it for you.