Hi, My 53 inch Hitachi projection tv has been working fine, but now the projectors are out of alignment and the auto focus does not work to fix it. There is a concave or half moon curvature now, as though the entire projection was pushed inward. How can this be fixed, does this have to be manually aligned?
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Re: colors out fo alignment
The convergence circuit is having a problem. This can be either bad connections at the pins of the convergence ICs or defective ICs. These are large black ICs attached to a heat sink and should be marked STK-XXX. If you can solder, try resoldering the pins of these ICs first. If that failes to resolve the problem, replace the ICs. The should be no additional alignment necessatry once the ICs have been replaced.
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There is a convergence output kit for this set. There are probably resistors in the convergence circuit that are starting to loose there values. If you are going to have the set worked on have them install the whole kit which includes the convergence outputs and resistors. Thanks
I'm no expert, but I think that you have a problem with the convergence
of the 3 color guns. I've been working on a similar problem. As a first
step, have you tried "Magic Focus?" The Magic Focus button for the
Hitachi 53UDX10B is at the left of the small front panel controls that
also include your RCA composite and SVideo connectors. Let the set warm
up for about 20 minutes (as recommended by the user guide), and then
press the Magic Focus button. When you press the Magic focus button,
the set will auto align the 3 color guns. If this doesn't fix your
problem, unplug the TV for at least 4 hours and try again.
Probably the color convergence is off. I had a similar problem. Have you tried the magic focus button yet? That is located at left in the small front control panel. Power on TV, wait 20 min (according to user guide), then press the magic focus. If that doesn't fix the problem, you could try the service mode alignment procedure. But that's a little trickier. I don't have a link handy for that procedure right now, but will look for it if magic focus doesn't re-align your color convergence.
Needs convergence amps replaced. Sometimes resistors burn and need to be replaced. This repair requires soldering/desoldering equip. and a trained eye, but usually can be done for 175.00-325.00 at a reputable service center. Good luck, Russmann.
Your HItachi has an automatic color convergence (color beam alignment) feature called "Magic Focus" which can be accessed from the set-up menu. When selected, you will be prompted to push the front panel "Magic Focus" button... do so only one time and do not hold the button in more than three seconds to enter this mode. The process takes about 90 seconds to complete, but a second push of the button will stop the process with no change.
If the convergence is still bad after the auto-correction process, then the guns are misaligned beyond its corrective capabilities, and would require manual convergence.
the convergence IC`s and associated resistors have to be replaced, do not repeatedly push magic focus or the alignment after the parts change out will take longer which of course means higher repair bill, good luck