Question about Hitachi 51F500 51" Rear Projection HDTV-Ready Television
The magic focus doesn't work and when it is actuated, it starts to go through it's function, goes quickly through the colors and then a blue #5 shows on the screen. The color is also degenerated.
The convergence has failed on your TV and will need to be repaired. You can call a shop or do it your self with a convergence repair kit from sites such as www.TvRepairKits.com . This is a failry common problem that all projection TV sets will have at some point.
Posted on Apr 30, 2013
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Posted on Jan 02, 2017
Your problem is the convergence circuit. This is very common in CRT projection sets like yours. There are a couple of IC's that need to be changed and possibly some resistors. A good repair shop will run you $400-$500 to do the repair.
Posted on Oct 28, 2008
You have a projection light element out. I had the green element go on mine. I had a service agreement so a repair tech changed it.
Posted on Feb 07, 2009
OK--for a Hitachi this set is a little unusual---it uses two of the STK-392-120 CONVERGENCE CHIPS.
Oneor both are bad(usually just one) You need to replace both and anydiscolored resistors around them--all the resistors have locationnumbers and if any are even slightly discolored you need to replacethem and both chips---You can buy a pair of these chips on Ebay forless than 13 dollars plus shipping.
If you remove the back cover (unplug the set first!) look at the circuit boardon the far right side----about 4 inches wide and about 12 inchesdeep---the chips are on the far right side on the large metal piecewith fins.
If you look and find any of the resistors behind them(on the left side of the metal with fins) discolored---note thelocation number printed on top of the circuit board under them (RK46etc) and I can tell you the exact value of that part--most of theresistors that fail are low value and can be tested just like afuse--It is important to find any bad resistors as if you replace thechips and miss any open resistors the set will still have the sameproblem.
THIS IS A EASY SET TO DO THIS REPAIR ON IF YOU KNOW HOW TO SOLDER---I CAN GIVE YOU INSTRUCTIONS IF YOU NEED THEM.
THISKIND OF REPAIR TAKES ABOUT 1 HOUR--THEN YOU ADJUST THE SET WITH THEORIGINAL REMOTE--set should be good to go without having this troublefor 5-8 years.
Let me know if this information helps you---If you are not able to do the repair let me know and I will give you advice
Posted on Oct 14, 2009
Testimonial: "Thank you so much. You have diagnosed my issue very clearly. I have a friend who can solder. I will pull the back panel and check out resistors."
Check the resistor in front and back of Convergence ICs. STK392-110s. the ICs might need to be replaced also. Look for poor solder connections also.
Posted on Oct 09, 2012
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