Question about Hitachi 51G500 51" Rear Projection HDTV-Ready Television

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Hitachi 51G500A Convergence Problem

I have a 04 Hitachi 51G500A that has a convergence problem. According to other articles in Fix Ya it is the IC chips. I even went to the tvrepairkits.com and in there it said the kit had two chips STK392-110. When I look at the chips inside my TV it has one STK392-110 and one STK392-150. Are the two interchangeable or do I have to have both chips?

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Hi, 110`s & 150`s are both replaced by stk 392-120`s. which run waaay cooler because the 120``s are rated at 4 amps while the 110`s and 150`s are 3 amp devices , the real key is to make absolutely certain you are not buying generics (which are everywhere on the internet), there should
be NO black print on the back side and a 4 digit code (not 5) on the front, top right corner, the originals or OEM`s are never $8.99, usually run about $12-15 and are made by Sanyo but the word sanyo will NOT be on the IC`s , so go by the info above, be sure to check for burnt resistors next to the heatsinks as well, good luck, video-tek

Posted on Feb 07, 2009

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I have no experience at tv repair but I solved this problem and you can too. I bought 2 stk 392-150 chips made by sanyo on ebay for $30. I bought a low life jewelers loupe which is a sort of cap with different lens pieces out on the end of the bill for $10 on ebay. I bought a soldering iron and the smallest diameter silver solder and a little suction bulb and heat sink grease from radio shack for $20.

Take the back off tv. Locate circuit board with ics. remove screws that hold board . there are several wire bridges, snap these apart also. number connections with marker, undo connections. you will note that this board is connected to 3 crts by cable, do not disconnect this cable! This board must remain connected to crts by this cable! (so much for tv repair.com telling you how easy you can remove the board and solder it in your workshop) this board must remain connected to the crts, you can flip the board upside
down but all work must be done at back of tv

undo screws on ics. pry ics loose from heatsink. put on jewlwers loupe then turn board over and heat up each ic pin then **** molten solder into suction bulb. each ic has 19 pins. remove old ruined ics ( shame on Hitachi) my tv was only 3 years old! Put gob of heatsink grease on new ic, spread with razor blade, not to thick or thin, stick new ic thru holes in board and screw to heatsink . solder all pins to circuit board. look at the resistors that are close to the ics. if one is burned black it will have to be replaced, they act as circuit breakers and will burn out to protect other parts of the tv. usually the resistors are fine it was just the cheapshit hitachi ics that were bad.

Put everything back together and turn on tv for 20 min. after 20 min do the magic focus. your tv should focus up and be good as new. I have fixed several hitachi 51g500a in this way. Good luck!



Posted on Sep 21, 2009

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My Hitachi 51g500a blue lamp is causing a focus problem on the scree. The blue picture is being projected but it is off from the red and green lamps. Any suggestions?

Posted on Dec 22, 2009

  • John Schuholz Jan 02, 2011

    one of your convergence chips has gone south. replace both like the above poster stated. check pico fuses and resistors neraby the stks.

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Solution:

Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
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Screen is bowed in or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence or magic focus section.

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