: Hitachi & Other Manufacturers Convergence Problems (STK392-110 ICs) Read Post 1
2009-10-20, 03:35 PM
Hello all. I have a 46F500 and i want to post here and get some ideas. My convergence is not as bad as some of the descriptions that i have seen in this posts, however i have the feeling that my Convergence IC's are starting to go.
This morning i went into manual focus (no time to do a full convergence) and I noticed that the grid is out of wack on the top right corner the most, but not to clear over all. Green and red are out of focus on all the corners but it is worse on the right corner. Also, when i run Magic Focus, the squares on the corners, well i think they are supposed to be squares, are bowing. Does anyone has a picture of what a good convergence is supposed to look like? Should i be able to comfortably read the small fonts in a PS3 when i have it connected. I know i should have not a green halo on the letters on the screen but I am also comparing the image to a Sony Bravia LCD that a friend has? Is an DLP capable of the clarity and sharpness of a LCD or do i need to sit down and spend a few hours doing a full convergence, perhaps an upgrade kit? Which are the newest chips for this set available or upgrade kits available? Anyone has an idea?
I will post pictures of my set when i get a chance.
2009-10-20, 03:44 PM
Yes, it is worth the 2 hours it takes and the $15 bucks to replace the ICs. The corners shouldn't bow, and this is an indication of the IC's going bad. I have seen DLP tvs that look better than LCD.
As far as an upgrade for your particular set, I am unaware of any, maybe someone else would know. Look how long the originals lasted.
3 Hitachis 43"
2009-10-20, 04:11 PM
I have had the TV for maybe 5 to 6 years. I remember the tech visiting once but just for a regular adjustment/cleaning of the lenses that was complementary from the store we bougth it. The picture on the TV looks nice and clear, but when it comes to smaller letters, like computer connected to the tv, small movie credits, PS3 letters, they do not display clearly.
I am an studying Automation and Controls and have an extensive electronics background with plenty of working in digital circuitry but I am a little afraid of changing the IC's and then having a worse convergence just like some other people have had here in these posts.
Where is it that i can find those IC's for $15.00?
2009-10-20, 05:28 PM
I buy all my chips at Suburban Electronics here locally, but they do ship:
2009-10-25, 02:43 PM
I was given a 4 year old hitachi 60 rear projection that as the previous owner put it and I quote "Randomly go 3d".After much research on the net I realized that the ic convergence parts where about to croak.Then I found this thread last night and read through the entire thread at 3am.So this morning I tore into the job .Once I got the convergence board out and under some bright lights I noticed that many of the ic contacts had cracked solder.I decided to just resolder all the connections to the board and see what would happen.I am pleased to say the tv has been on for about 3 hours and so far picture is still great.
A big thanks for this thread without it I never would have worked up the never to try and fix this myself.
I have since cleaned the mirror and the crt lens and wow this tv gives my 1080 lcd a run for its money.
I am now going to search this great site and see how often it is recommended to change the crt coolant and if I should clean the inside part of the plastic screen.
P.S. I think I am going to add a fan to the back of the set as the air circulation is really poor.
2009-10-30, 12:46 AM
Had a bad convergance problem. Bought the kit and all is well except that it's stuck in STATIC Mode. If I hit the magic focus I immediately get the Green STATIC MODE message and then a black screen with a single set of cross hairs that flash and go through the colors and then it returns to the picture. I think my biggest problem is that I'm using a generic remote that doesn't do everything that it should. If I need to hit the "blue button" is it with the TV on or off? I'm sure I missed this somewhere in the last 39 pages. I've read the DCAM links and I'm missing it somewhere. Please help....
Press the small blue button with the TV on. It should take you out of static mode into DCAM convergence mode. You of course need the correct remote (or one that has the equivalent buttons) as indicated in the DCAM convergence thread.
If the convergence problem has not been fixed properly (as indicated in post 1 of this thread), then you may not be able to perform DCAM convergence.
2009-11-02, 07:54 PM
Excellent information. ordered the parts of e*ay, took me (a novice) about 2 hours to remove and resolder the IC's and resistors.
Up and running, fixed the convergence (was the red one).
Took a while to read through most of these, but Thanks to all the excellent posts.
2009-11-17, 06:22 PM
I have a hitachi 53fdx01b, which I replaced the convergence ic's. Pictures looks good, except I know I need to do a convergence adjustment. Problem is when I press the blue button it won't take me the the crosshair screen. Only get what looks like static specks over the tv picture. I can't get access the the DCAM. Did I miss something while replacing the IC's?
I'm not sure if that model has DCAM - perhaps only a manual convergence with say 4-9 crosshairs, which you should be able to bring up as indicated in the operating manual?
Perhaps you could consider getting a service manual?
2009-11-17, 06:42 PM
Downloaded service manual for this model, but got the same instructions as posted here. Before I replaced the IC's I was able to enter the convergence screen, but I can't now.:confused:
Did you replace resistors, check for cracked solder, etc as outlined in post 1? There's a list of things that people missed in post 1.
What happens when you press magic focus or whatever the user convergence is for this model TV? DCAM is actually a service convergence, not really applicable to the average user.
When you used to adjust convergence, what came up? 9 cross-hairs?
2009-11-17, 06:55 PM
When I the press the blue button nothing really happens. Sometimes I get what looks like static over the picture, but I'm locked out of going to the adjustment screen.
Are you talking about the little blue button on the chassis, or some button that a normal individual would press on the TV or remote to do convergence. I'm trying to ask if you can do the latter.
2009-11-18, 01:35 AM
Can anyone recommend an authorized repair shop or any good repaiman in Scarborough area where I can bring my board and have it fixed?
I dont think I have the skill set for this repair thing... :(
If you can't find one in Scarborough, try Radio Service Laboratory 3307 Yonge St. (North of Lawrence)
2009-11-19, 12:53 AM
Buttoms on remote working fine. According to both the user and service manuals access to the convergence screen is by depressing the convergence button in the front panel or the blue button on the chassis. Neither of them seem to be working. They did before the convergence chips went out, but now don't. The picture looks ok, but it needs some adjustment.
2009-11-23, 11:29 AM
I've posted here a couple of times here before with no response. Thought I'd try one more time. I also had convergence issues with my tv. I replaced the IC's, replaced all of the convergence resistors with no change in my situation. The picture is reduced to the center width of the screen with the 3 colors. I got on all experts.com and Allan there said it sounded like a yoke transformer. Any ideas?
2009-11-29, 05:35 PM
Recently got a Sony RP HDTV that has the convergence way out of whack.
I plan on replacing the ICs and have done some reading about newer chips coming out to replace the originals with one of the main benefits being that they run cooler and the failure rate isn't as high.
I already pulled the back off of the set and the ICs that are in there are
Are these the only ones available for the set (Sony model KP-51WS510)
Any leads on the cheapest (yet reliable) source to purchase them?
I have a friend who is a tech who will replace them for me once I pull the board. Other than checking the resistors anythings else he should test?
Is their a manual/schematic anywhere for download?
2009-12-02, 01:45 AM
hey guys, quick question. i have a Hitachi 46f500 that i replaced the IC's (not the resistors) on around march 2008. shortly after fixing it the problem seemed to return so i put the tv away in the storage area of the basement and haven't thought about it since. tonight i saw it and thought what the heck i'll plug it in and see. well plugged it in and turned it on and its working great. now i didn't leave it on for very long.
Could the problem only occur when the chips have heated up? I'm going to turn it on tomorrow after work and leave it on and see what happens, i just thought i'd ask if anyone has any ideas?