Question about Hitachi 50EX01B 50" Rear Projection Television

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Part number for IC module Hitachi 50EX12BA?

HI, I'm an Army soldier stationed in PR; having convergence problems. Does anyone know what the IC module part number is and where I can get it? My problem is similar to other posts; Curved line on the bottom bowing towards center.

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Re: Part number for IC module Hitachi 50EX12BA?

The Hitache 50EX12BA uses 2 IC's labeled STK392-110. If you are looking in the back of the set, the convergence IC's are mounted on the large heat sink on the right side. If one of the IC's has burned out, go ahead and replace both IC's with the newer improved STK392-150 IC's. These IC's are very common and can be ordered from almost any electronics parts supplier. When installing the new IC's you will need to clean off the old heat sink compound and apply fresh compound to the back of both IC's.

Posted on Aug 19, 2007

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Re: Part number for IC module Hitachi 50EX12BA?

Hey, my 50ex12ba has three STK4274. it was built Dec. 1995.

Posted on Oct 06, 2007

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Watching our Hitachi Ultravision 57" and the colors seemed to separate, seeing several images, each in it's own color. Ghost-like...any ideas?

yes that is always the same problem.,
that is the convergence module where you have two
ic call stk /but you can try the magic focus button if it work for a while and come back you will have to replace the ic.
hope that give you an idea
have a nice day

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It sounds like a convergence problem; either bad solder connections at one of the convergence Ic chips or a bad Ic. if this was helpful give me a vote----if one of the chips is now bad it will have to be replaced(usual thing is to replace all the convergence ic chips---most use two and a few 3.

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If the problem "distorted picture" was red and blue lines everywhere you may have a shorted convergence IC and the set may be in shutdown; someone needs to determine by unsoldering the two convergence IC chips and then trying to turn the set on; if they are unsoldered and the set comes on---one of them is the trouble----also you can look around them at a number of small resistors to see if any are discolored or look burnt--If you need more direct assistance my email address is:

The convergence ic chips are usually located on the right side of the set as you look at it from the back on a large finned piece of metal(it is a heat sink to keep them cool).

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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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IC module part for Hitachi 50EX12BA?

Hi.. look I am willing to obtain & send ya the "bit" free of charge if ya can find out what the "Bit" is I found a link below that indicates a free service manual to help with identifying the "Bit". I "Googled" Hitachi 50EX12BA and got a lot of "Hits"... see if ya can get the part number and your return address and send it to my email, if i can obtain it I will send it on ASAP.. Anything for support.. alla best from New Zealand..

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