Help with STK's

I almost forgot, I have been working on this set for several months off/on. I am a beginner and like the experience anyway. Some of you may remember my posts for feedback concerning the above set (turning itself off). I found out what was wrong!!!!!! After finally figuring out that the relay in the power supply was staying energized when the set goes down, I checked for power on the primary of the switching regulator and I had it. Nothing on secondary cause the regulator was shutting down. Why? Because after a careful look at the regulator and a very hot touch of it, I realized my dumb AS* didn't secure it to the heatsink using the machine screw or heatsink compound. Fixed this and BINGO. The set stays powered up now indefinitely. Most of you probably wouldn't have made this mistake in the first place, but I thought this was worth posting. Thanks again all.

MCM Electronics

has them in stock. Electronix has them in stock Consolidated Electronics has them in stock

Should I order them for you also?

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Dave M
MasonDG44 at comcast dot net  (Just subsitute the appropriate characters in 
the address)

Never take a laxative and a sleeping pill at the same time!!

Yes please. When you get them post back and I'll tell you where to send them. When I receive them - I'll pay you back. How's that sound.

HA HA. Me thinkst he was being sarcastic. He gave you the links so you could just order them yourself. I would suggest however, that you get them from B&D

because we have found their semis to be more reliable. Only problem there is they have a minimum order of $25 I think. Replacing all three might cut it, if not you might find SOMETHING on their website you might want to break the $25 barrier.

Also note that if you don't have a vendor or business licence MCM and some others won't sell to you, but usually only if they're based in your home state. MCM is in Ohio, I think B&D is in New York, but not sure.

Also be aware that if the STKs have lot # of 7027 or starting with E4 don't trust them, that is don't second guess yourself because these lot #s are problematic. The E4 series of STKs usually fail quickly or work =BD assed from the beginning. If you change them and get a change in symptoms, get some frome a different supplier. Don't expect your money back either, and remember, TV shops go through this all the time. So when you see that the ICs are only about $12 each, don't wonder why a TV shop needs about $200 to replace them. Of course this includes cleaning, alignment and soldering, but getting substandard parts is a big problem for us all.

JURB

HA HA. Me thinkst he was being sarcastic. He gave you the links so you could just order them yourself. I would suggest however, that you get them from B&D

because we have found their semis to be more reliable. Only problem there is they have a minimum order of $25 I think. Replacing all three might cut it, if not you might find SOMETHING on their website you might want to break the $25 barrier.

Also note that if you don't have a vendor or business licence MCM and some others won't sell to you, but usually only if they're based in your home state. MCM is in Ohio, I think B&D is in New York, but not sure.

JURB

MCM does not require that you be a business in order to do business with them... I have placed many orders from them without a business name.

And yes, I was being sarcastic when I asked if I should buy them for you.. searching the web for electronics suppliers is child's play... and you could have easily done it for yourself instead of asking someone else to do it for you. Try Google first next time you need something.. you'lll save time and the subsequent ridicule that you deserve and will likely get.

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Dave M
MasonDG44 at comcast dot net  (Just subsitute the appropriate characters in 
the address)

Never take a laxative and a sleeping pill at the same time!!

Thanks a bunch for the reply. Very informative, and I will check them out. I am capable of searching and ordering components online and have done so. But FYI, I am having difficulty locating components for this particular TV. So, usually when I try to cross to NTE, and they don't have it, I am stuck ordering through Union or Tritronics, and they are limited in what they carry as far as Hitachi parts go. One of the links Jurb posted was helpful (carry gobbs of Hitachi replacement parts). I have searched the web for other Hitachi part suppliers but haven't had any luck. This is the long story of why I asked what seemed to be a lazy request. My post was not asking someone to surf the web for a part for me, but asking if someone familiar with STK's could tell me there are generics available - yes or no question. I can take ridicule, but I sure wouldn't bother to take the time to look for a component if I thought the person asking could do it their self. (unless I was looking for an excuse to ridicule someone). Jurb, thanks for the links, and I have your ridicule..........................

Available at

snipped-for-privacy@cox.net wrote:

It seems the STK392-110 has a 3 channel output stage, but the STK4274 has only 2 channels.

- Met vriendelijke groet,

Maarten Bakker.

Just for the record, I looked up the replacement, it should be: STK391-120.

- Met vriendelijke groet,

Maarten Bakker.

Ok the STK391-020 is the same as STK4274.

NOT STK392-110