: Hitachi & Other Manufacturers Convergence Problems (STK392-110 ICs) Read Post 1
2011-01-28, 08:20 PM
hello, recently the convergence on my hitachi has gone out of wack. The red and blue can be adjusted however the green can only be adjusted on the vertical lines. I have tried the majic focus, reading from the rom and tried adjusting in dcam mode but nothing helps. Any ideas?
Your post was moved to this existing thread on the topic. Please read post 1 carefully and throughly, along with the links there. Replace the ICs and resistors, etc.
2011-02-06, 04:11 PM
New to the forum.. Lemme lay it out. Picked up the Tosh 50HX70 from a co-worker who ditched it 'cos the red convergence was bowing up. I took it off his hands and ordered the new IC STKs. I installed them and hooked it all back up last night. When I turned it on, it was like the convergence had reset, all the colors were misaligned and I could not adjust any of the colors from the menu, they wouldn't move. I have the Service Manual for the TV, but can't get it into service mode the way they instructed. Which was to hit mute, hit it again and hold, then press menu on the set. Can anyone confirms this works, or another method of adjusting the convergence on this set?
Hoping the monolith in my living room starts making moving pictures.
Per post 1, did you replace the appropriate resistors? Check the other items in the checklist?
Here's an (older) FAQ on Service codes/modes - heed the warnings:
Here's a post useful for those new to the forum - FAQs, Search Tips, Optimization:
2011-03-01, 08:01 AM
I am new to this site but It has been a great help and is wonderful. I just had put new convergence STK 392-110 in my set and I still have the red horizontal bow top and bottom of the screen. There are three wires plugged to the board Red, Blue and Green and I did not mark the order they go. Can anyone help with this? A service manual would be much appreciated. Thanks and any help with why I still have red bows on top and bottom. Thanks
2011-03-01, 08:40 AM
u don't even mention what brand it is.
Main branch of our Local Library always used to subscribe to
SAMS Photofacts, probably still do. Search the index.
That's where I used to go. If it's listed in the Index, then it should be available at your local library if they have a subscription. If not, they may be able to borrow it from another library system that does have a subscription. They do favors like that for each other all the time.
James38362: Your post was moved to this existing thread on convergence issues. Make sure you check out post one and the links there thoroughly. For example, if you replaced the ICs and not the resistors, the resistors could be bad and have damaged the IC.
2011-03-01, 01:28 PM
I did check them and they check fine and no burnt look. Can you help with the wiring? Thanks
As mentioned in post one, you cannot check the resistors, you can only replace them to be sure. There are also other things mentioned in post 1. Often if people only replace the ICs, they have other issues and also possible blown new ICs.
2011-03-03, 07:53 AM
I found RK46 was not reading zero on my meter last night. Pulled it out and put in a new one but did not get to put it back together yet. Will let you know if it worked when I get it back together.
2011-03-03, 12:01 PM
Re: "Service Manual Needed 51SWX20B Please Help"
If you still need one, I may have a manual. Remind me about it if I forget to check when I get home and post my response here. Do you need one?
2011-03-03, 04:07 PM
Yes sir I need it if you got it. I sent you a private message. Thanks James
2011-03-04, 07:48 AM
Will for anyone who is interested to know, the RK46 resistor did the trick. My Hitachi is back up and going strong with new Ic's and one resistor. I really beleive the resistor was the only real problem and could have gotten by with just replacing it if I had only knew what I now know. Thanks for 57 and all others who helped me out. Thanks James
Good to hear. Glad to be of service.
2011-03-31, 04:05 AM
Time to brring this back!
I have to tv's LG and Hitachi. I got the LG working by replacing the convergence chips. I bought some for the Hitachi and changed them. No luck the same problem still.
And since my Hitachi had been fixed for the same problem a few yrs back. I started to look at the chip board. Sadly the store that fixed my TV has closed down. I think the guy retired, he looked pretty old.
I know he changed 2 things to fix the problem. He replaced my power supply and some other chip. I'm wondering if it's a deflector chip? It's close to the power supply. I'm gonna see if I can read off a model #.
I can see the soldier he did, as the part where he melted has turned a but brown instead of the normal silverish color you see. The same when I changed the convergence chips, so I can see what parts he removed and it seems like 2 parts as mentioned above.
I know the power supply works fine, as my tv stays on and doesn't randomly turn off like it used too. Just the picture is stretched out.
2011-04-05, 08:53 AM
So you changed the convergence chips on the Hitachi? I did too but it turned out to be just a resistor. If you bought the kit it came with the resistors and you should change them and you might get lucky and fix your problem. What is it exactly? Blurred images or what?
2011-05-11, 10:17 PM
This is my first post on this forum, wich i found searching the web for answers to my problem.
A friend of mine pretty much gave me his old tv, telling me it had a problem with the colors. Since it was a definite upgrade from my old 27" CRT tv, i took it!
The model in question is a Panasonic PT-47WX52CF, chassis #EP824. It was produced in june 2002.
This is what the screen looks like in a white-ish background (easier to see than with motion);
Here's a picture of the convergence setup #2; I cannot correctly setup the blue on a few spots, especially #1 (upper left) and #6(lower left);
I managed to find the repair manual on the web, and was able to access the service mode. In the convergence setup pictured below(blue), the green and red specs are alright (perfect vertical and horizontal lines). But this is what the blue looks like;
The tv performed a system check, and everything turned out OK, nothing anormal detected whatsoever, i dont even have blinking codes with the power LED...
Do i have an issue with IC chips, and/or resistors, or a way more expensive fix on my hands?
If ever you guys need more precise info, let me know! Oh yeah, i didnt open the tv yet (casing)
Your post was moved to this existing thread on the topic. Yes, looks like IC/resistor, etc issues and then you probably need to do convergence once that's fixed. Please read post 1 of this thread and the links there, thoroughly and carefully.
2011-08-18, 06:04 PM
Hello, I have read all of the posts and I know what "should" be done, but what if I cannot even get into Magic Focus or DCAM mode. Whenever I press the "little blue button" or the MF button on the panel of the TV, the screen just goes black for about 15 seconds then returns back to regular image with messed up colors.
I reluctantly called the service guy to come out because I had not seen this particular symptom in any of the threads so I was not sure if simply replacing the ICs and resistors would fix the issue. The service rep replaced the two ICs with 150s but did not replace the resistors. Fired up TV and still had convergence problem and still could not bring up Magic Focus or get into DCAM mode. The service rep thinks that it could be the "Digital COnvergence Board", the little box that's right behind the blue button. He said he would take the entire board back to the shop and replace that piece if he had one in the shop. I asked him if he needed to simply replace the resistors and he said he didn't need to since he can't even get into the MF function. He said he thinks the problem is with the DCB. 4 hours later, he tells me that he doesn't have that piece in the shop and cannot find one on-line. Now he wants to sell me a newer model Hitachi that he has in the shop for $300, a DLP I think.
57, please tell me you have a clue if this guy is on the right track. I thought he at least would have tried to replace the resistors just to be absolutely sure. Now I've paid him $50 and I have to go pick up the board and either buy a new TV, pay $300 or tell my son he has to live with the 2 images of sponge bob for a little while longer.
I don't believe very many people are paying "real money" to fix any of these old TVs. It's simply not worth it, especially a 10+ year old 4:3 TV. Some people may fix them themselves for a few $....