IMAGES APPEAR WITH A HALO EFFECT. MAINLY SURROUNDED BY RED. THE MAGIC FOCUS FEATURE STARTS TO WORK, BUT WHEN IT GETS TO RED IT STOPS AT TWO BARS
The convergence has gone out and when i run the magic focus it runs for about ten seconds and then flashs a green number 4 in the lower right hand corner. I don't have the money to get it repaired but i do have some expierence with silver soldering mother boards for I.O.Mega computer systems. I would appriciate any help in getting direction to parts and schematics to fix this problem. I LOVE THIS T.V.
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Re: IMAGES ARE OVERLAID AND NOT IN FOCUS
Here is the schematic diagram. Download all the 13 parts and unzip them using winrar.
The parts you need are listed on page # 50 of the schematic diagram.
You will find the ICsHERE.
Make sure you check the fuses and micro/pico fuse nearby the ICs, as well some crystallized solder joints.
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Sounds like the convergence circuit is failing. You can try pressing the "magic focus or perfect focus" button to see if it clears up. If not the circuit is bad and needs repair. They have repair kits on this website. tvrepairkits.com if you want to try repairing it. otherwise it can cost $300-$400 to have somone else repair it.
Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s) This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks! See link for more detail http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html
If this tv has a feature called magic focus or perfect focus which is a button inside door that flips down on the front, then it has sensors on the inside of the screen. When it was pushed in, these were probably messed up and will cause a poor picture. It may be difficult to get those realigned. Magic focus will not work right until they are realigned.
Just to clarify, it sounds like what you are saying is that the image
appears to duplicate in either red or blue along the edges of the image
(especially white lettering and probably increasing along the boarder
of the TV). This is resolved by converging your TV. Convergence will
drift normally on large screen projection TV's over time or through
moving them. The Hitachi 57f500a has a feature called "Magic Focus" (pg
36 in your manual) which will auto converge the image. If the auto
converge feature doesn't work, on page 37 in your manual, it explains
how to converge manually. If you do not have the manual, I have the
image of the pages below. If for some reason this doesn't work, please
provide additional info and detailed prior to rating the help.
I have red concave lines going across the screen, plus wording appears double like a ghosting effect, this is ongoing from the time the tv is turned on until it is turned off. This started 3 days ago. Is it time for a new tv, its 9 or 10 yrs old now.
sounds like you are having a convergence fail. there are 2 Convergence amps in the tv should be on the largest heat-sink inside(right hand side looking from back) replace with stk392-110 and any open or burnt resistors. check for any cracked solder and mark any cables you unplug. if you do that work and need to align the convergence at all let me know and ill walk you through those steps
without knowing the model number, i can only give you some ideas on what to check.
If the tv was working fine, and started experiencing the problem after being moved, check your focus. you may or may not have an electronic focus pot on the rear of the tv, and you should have a manual focus located on the lens assembly, loosen the wingnut and rotate the lens to focus it.
also check the crt coolant level, if it has a bubble in it, it may be causing the red halo effect.
if the red is to the top or side of the characters and not completely surrounding them, it may be a convergence issue, check the manual for convergence procedures, if it does not have them, your best bet would be to take it to a service tech.