Toshiba 50" rear projector. The tv flickers a few times a day and the convergence is off by a mile. Now tv will go into "standby" with the power light flashing and the only way to get it back is to unplug it and wait then plug it back in after a few minutes. Anyone in the Abinton Mass area that can fix it or refer a repair man I will hire you. firstname.lastname@example.org.
I recently had what sounds like the same problem. The problem was that the focus anode coming out of the flyback had broken loose enough to start arcing inside the flyback. You might want to verify that this connection is tight.
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More likely is the set is in shutdown---most common issue on this type of set is the convergence---to know you would have to locate and unsolder both 18 pin convergence chips---with them out of the circuit if the set comes on (will not look good) one of the two chips is shorted--these sets have very good protection circuits to prevent many parts from being destroyed at one time..
These are the chips--STK number is right on the front.
Ur tv have convergence problems,it dead.U must have soldering tools,solders and know how to solders to fix convergence problems.U must replaced 2 STk convergence ICS,and some or all it resistors.Tries websites Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost U $300-$350 for parts and labors.
defintly the convergance.if the con is on a small board ,maybe 130 big board 250&up.if u know how to solder 35$ each STK and u need 2. and check each internal fuse with a ohm meter with tv power unplugged
We need a better description of what you mean by shadowing. However I am assuming:
1. You mean it ''bleeds'' off to the right when you have something with a hard red/blue drive.
2. When you turn the contrast and color down a bit it gets better.
unfortunatly I cannot tell you how to fix convergence, but I can think of some other possibilities.
In this case the red/blue emmision of the crt is dying off and going into saturation when driven hard. To fix, replace with a new picture tube/crt. In some cases you can get a little more life out of that tube (with a watchable picture) by having the screen, focus, cathode bias, and drives slightly readjusted. It will take someone with experience in doing these adjustments on a weak tube to get it looking as good as possible.
Given the construction of the cathodes (guns) in that crt, only a very low level crt reactivate should be tried on it. The hard rejuv most crt testers give is highly likley to completely destroy the cathode on that crt.