Question about Hitachi 51F500 51" Rear Projection HDTV-Ready Television
The tv have a problems known as a convergence problems,it dead.Magic focus button doesn't work.The R,G,B colors lines don't match up mis alignment,have colors shadows pictures or 3D pictures.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts,must be replaced to solved the tv convergence board problem,to solved convergencce problems.The shop,will cost u $300-350 for parts and labors.
Posted on Sep 15, 2010
If picture looks 3d in some way you have a convergence problem.
This set should use two of the STK-392-150 CHIPS FOR THIS.
The repair can be a do it yourself one if you have some skill. Magic focus only attempts to adjust at about 18 points on the screen.
Parts cost will be under 25 dollars. The repair consists of getting at the chips (2) and replacing both--on EBAY they will cost under 15 dollars (I fix sets and use a seller there).
If I can help make a comment here and if this told you something you did not know, rate this solution as very helpful as I do this here for free.
Posted on Sep 15, 2010
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Posted on Jan 02, 2017
SOURCE: Magic Focus does not work.
Convergence issues usually resolved by changing convergence output amplifier IC's.....Original STK392-110 should be replaced
with upgrade Stk394-160E Hitachi part # CZ 01341,change both
for reliability.....check B+ feed resistors for over-heating....T.
Posted on Feb 04, 2008
you need to replace the convergence ICs they are STK392-110 you can get replacements at the following link and they send instalation instructions with pictures so you can do the repair yourself. You need to replace both IC they are both STK392-110 they are located on the large heat sink on the far right side of your Tvs' chassis Heres the link for replacement ICs
Posted on May 20, 2008
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
Replace Both of your STK ICs they are Big Black ICs Also CK and replace these resistors RK42 3.3 /RK46 1.8 /RK50 2.7/ RK54 1.5 RK54 1.5/ RK58 3.9 /RK62 2.2
Posted on Feb 16, 2009
The magic focus will stop if there is a bad sensor and or a problem in the convergence circuit.
This set uses two STK-392-110 convergence chips--both along with any of the resistors that protect them need to be replaced and the set adjusted--I have repaired hundreds of these sets----
Confirm model number----and if you go into the customer menu and either red or blue will not move in any or some direction--the chips have to be replaced---LET ME KNOW WHAT YOU FIND AND I CAN GIVE YOU FAIRLY DETAILED INSTRUCTIONS ON WHERE TO GET THE PARTS AND WHAT IS INVOLVED IN THIS REPAIR.
I am here to help people--
REGARDS, SD TECH
Posted on Oct 02, 2009
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