Question about Hitachi 53UDX10B 53" Rear Projection Television

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Hitachi 53udx10b convergence man is sad today

Okay,my wife has already been on here, so it's my turn.stk-110 were replaced with stk-180's. i soldered all pins,not a professional, but did a pretty good job. put it back in the tv. after all was in place, turned it on, screen was whole, no lines , just some double vision.i did notice a resister poof with smoke. thought nothing of it and looked into adjusting the pic which was to no avail. so i called a repair shop today,, he was very open for info on the phone. he said the light box may not be lined up.that whole grid you see when you take off the cover.. so i moved it a couple times, screwed back in the grid using the four screws. with the back off, she turned on the tv, poof, a small bit of smoke again. so i took off the mother board again from the grid. noticed the harness on top of the area you would plug your video leads back into was forgotten during the first reassembly.after doing some reading online, i went and bought a multimeter to measure the resisters. no reading was given on the burned out ones. all the others were close to what the other guy said they those parts were wrote down(rk46)2.0 ohms.etc...should i order 1watt parts or 1.5 watts as i have read from another blog.and where should i order my parts from, is online a good place. that is where i got the stk's from. only took two days to deliver. i did turn over the grid and use a real fine screwdriver to clean between the soders on the stk' looked pretty good. so what else could go wrong with this fix? do i need to get several of each resister? sad with no amps!

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Re: hitachi 53udx10b convergence man is sad today

To my knowledge Stk392-180's are not a good sub for -110's...
Hitachi STK392-110 subbed to -150 and currently subs to
STK394-160E = HITACHI PART # CZ 01341 = an upgrade = the
best IC for your repair.....Please read some of my solutions for
more details.....Here is the basic idea...when I repair a convergence circuit,my first thought is = are my replacement parts OEM quality or better ? A cheap generic second will just BURN RESISTORS so why would I use them? New,proper IC's
should never burn resistors ! The wattage of resistors is a minor
issue concerning damage from failure of original IC's...the right
choice of IC replacement is of MAJOR importance ! .........T.

Posted on Jan 12, 2008

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Have a convergence problem on a 53 inch hitachi projection tv. How can I fix it

Start out with replacing both of your STK ICs 392-110s use 120s or the 150s Mats Electronics has them 1-800-628-1118
They are big black ICs and will have the part number on them STK392-110.

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Replace both of your STK ICs STK392-110 use 150s
Mats has them 1-800-628-1118

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Looks like the picture is being pull to the center

Hello the convergence IC's have failed and need to be replaced. the part number for the IC's are STK-392-110, have them replaced with STK-392-120 as these will last longer.

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Replace Both of your STK convergence ICs STK392-110 use 150s also ck these ResistorsRK42,46,50,54,58,62
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Sure, Stk392-180, I use them all the time instead of the 110 and 120. Was your convergence out and that prompted you to replace the Stk's? If you had a picture before ( but bad ) I would check for the 6.8ohm bias resistors. They must be on the money, if not, they will destroy your Stk's in a heart beat. They are all located right buy the Ic's all in a row. Don't forget to clean the heat sinks off then apply a bead of Heat Sink Compound across the middle of the Ic's before installing them. the resistors may not be the value I stated, so measure a few, that will tell you,

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Electronix Online - Electronic Parts & Accessories for Technicians and Hobbyists
Order Number: 35987
Detailed Invoice:
Date Ordered: Monday 09 October, 2006
Ordered from IP Address:

Technical forum on website had link for Hitachi HDTV convergence board problems

2 x Semiconductor STK392-110 (STK392-110) = $11.98
Sub-Total: $11.98
Tax: $0.00
Shipping: $6.30 via USPS priority Mail 1 X 0.7
Total: $18.28

Sits on soldier stand, and will take a good soldiering job to attach. I replaced both since they are only $12 for two of the STK chips.

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1 Answer


Chances are it's the STK392-110 convergence IC's....check for blown resistors in the area of the STK's also. It's a really simple solder job. I'd suggest buying a desoldering tool (about $30 off ebay for a good iron style with spring loaded "******") and I'd also suggest replacing BOTH stk's and not just the one. NORMALLY if it's only one STK that's gone south - if the TV is on you can see the STK's with the back cover removed, they are attached to large heat sinks, and look like black blocks....ONE of the heat sinks after operating for a half hour or more would be noticeably hotter if it's burned out. Touch CAREFULLY to check for heat with power on (duhhh) and beware that if the STK is failed - the heat sink may be VERY hot. Heat would be the indicator that something has failed miserably.

STK392-150 is an upgrade part# to replace STK392-110, and they will last longer due to higher heat tolerance. If you're going to replace the STK's - get the 150's, and MAKE CERTAIN they are authentic sanyo IC's. The generic **** won't last long.

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It looks more like an open solder because you were able to align it properly after replacing the STK ICs, if there was an open resistor(s) you would not be able to get it align.
I would suggest to go back and double check the solder joints on the STK ICs as well add some fresh solder to the resistors nearby the stk392-180.
Good Luck.

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chances are that IC804 has failed. You have two ICs that allow you to converge the three colors. IC804 is used for Red Horizontal and Vertical Convergence and also for Green Vertical Convergence. IC805 is used for Blue Horizontal and Vertical Convergence and also for Green Horizontal Convergence. These ICs run very hot and have a very high failure rate which sometimes will cause damage to resistors in their associated circuits. They are both STK-110 and it's best to replace them both at the same time. It's also a good idea to upgrade them to either STK-150 or STK-180. These will run a lot cooler than the STK-110.

Before replacement do inspect for any open or overheated resistors as I stated earlier. Being you only have problems with Red Convergence the plus and minus power supplies should be okay since they are common to both ICs.

Try They have the Hitachi CZ00433 (STK392-150) in stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very good results replacing STK392-110s with these chips. Do check for open or overheated resistors before replacing these chips

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