: Hitachi & Other Manufacturers Convergence Problems (STK392-110 ICs) Read Post 1
2008-07-07, 05:33 PM
I came accross above link while browsing thru net.
If you are registered tech then you can get id and pass for this site which will give you all the information free including service manuals.
Since I am not tech they send me email and I got lots of information from them. Please see the info I got from them for my model. If you need same info for your model then go and register to above site and someone will contact you in 24 hour.
53SWX10B, 53SWX12B, 61SWX10B, 61SWX12B
X480302 Repair Kit for the JT22056 (DP-17 Convergence Output PWB)
This Repair Kit has been created in order to aid the service technician in acquisition of the proper convergence output section repair parts. Included are the six low ohm/high wattage return resistors as well as both output devices. Generally speaking, this kit is to be used when a single color has lost either horizontal or vertical control. It is highly recommended to replace all of these parts together, especially the two STKs. If the convergence problem remains after replacing the output section, the service technician should be advised to ensure that both the DCU and the Convergence Yokes are functioning properly.
Convergence Output Section of JT22056 DP-17 Convergence/Focus PWB.
Contents of JT22056 Repair Kit - p/n X480302
53SWX10B, 53SWX12B, 61SWX10B, 61SWX12B
Resistor Location Value Part #
RK42 2.2 Ω 1 W AT03197S
RK46 1.5 Ω 1 W AT03193S
RK50 2.2 Ω 1 W AT03197S
RK54 1.5 Ω 1 W AT03193S
RK58 2.7 Ω 1 W AT03199S
RK62 1.8 Ω 1 W AT03195S
IK04 & IK05 STK394-160E CZ01341
NOTE 1: The demand is extremely high for these repair kits. If, (in the event) that a kit is on Back Order, please order the individual parts separately. Use the Convergence Low Ohm resistor values and STK table which shows the correct resistance, STK and Part Number. (DO NOT use Generic ICs.)
NOTE 2: The STK392-110, STK392-120, STK392-150 Convergence Outputs ICs are no longer available.
They have ALL been replaced by the STK394-160E (p/n CZ01341).
Note: This replacement is not backward compatible. You can not put a STK392-110, STK392-120, STK392-150 in place of the STK394-160E, but you can use the STK394-160E in place of the STK392-110, STK392-120, STK392-150.
Suggestion: Please replace the Outputs as a pair.
IMPORTANT: The Resistor Values shown in the Table MUST BE USED, failure to do so may generate a shutdown condition when using the STK394-160E.
He also give me link for thier parts distributor who sell latest model of these kits.
To conclude, I dont think STK 110 and 150 should be used to fix your TV, I would rather go with 160 as mentioned above.
2008-07-07, 05:36 PM
I also had dedicated support person from Hitachi Service to help me out with any other question I had.
I hope this helps.
2008-07-08, 07:17 PM
Okay, I have been studying the service manual for my Toshiba 50H82 and found that the IC I need is the STK392-110. I also understand that the STK394-160 is a good replacement. The kits that include the resistors seem to be specific for Hitachi model TV's and the upgraded IC. My questions:
1> Will the resistors work with my Toshiba?
2> Should I just get the STK392-110 kit and forget about upgrading? I beleive the STK394-160 is more reliable/heat tolerant.
3> Is the assumption in question 2 correct?
Thank you. :)
I know this is basically the same question as the above post a couple up. I don't think it has been answered though. I just noticed Ketun's response and I have several browser windows open with different pages up for all this research I am doing. Sorry if the questions sounds redundant.
2008-07-09, 11:25 AM
As long as Ohm and W vaules are same it would work regardless of which TV model you have.
Best way to find out is just get the Kit number for your TV from its service manual and go to one of the part distributor from the link I have posted above and search for that Kit. That will give you list of ICs as well as resistors you will need for your TV.
I hope this helps.
2008-07-09, 12:06 PM
Just got a reply at another forum and it looks like the resistors in the kit are specific to the Hitachi chasis. Now I need to identify what if any resistors are actually damaged. It would be nice if Toshiba supplied a repair kit. I'll have to look into it.
2008-07-09, 08:25 PM
In an attempt to obtain parts for my Toshiba 56H80 I ordered a new convergence board from www.partstore.com I was told by two different reps that it was "available". I ordered it on Monday 7-7 two day air. On Tuesday I checked status on line. There was no change so I called in only to find out that according to www.partstore.com "available" means you can order the part... But, they have no idea if it is "available" to ship. Misleading a bit wouldn't you say? The board I ordered is backordered till 7-15 :mad: so I am back to square one. Neither supervisor (Jacob or Jennifer) gave a rats butt about the problem and could not transfer the order to an obtainable part. I would definitely stay away from this business.
2008-07-09, 10:57 PM
I have ordered replacement IC's and they should be here in a week. I figured I would take out the board to be ready for when it arrives. One thing is keeping me from taking it out though. Does anyone know how the "jumper" blocks between the two boards are removed?
Here is a picture of what I mean. Its the two white and one blue blocks that I don't want to damage them. They seem very delicate.
2008-07-10, 12:03 AM
Never mind. I figured it out. They have some tabs that you lift up. Was a little tough to get off but I got it. The board is out. :D Upon initial inspection, the resistors look good. I am going to look for cracks in the solder now. Now to wait for the parts to get here.
2008-07-10, 12:51 AM
The inside of this set is really filthy. :( I am going to vacuum it out. Here are some more pics of the inside. Took them mainly to remember all the connectors I unplugged.
Resistors can look good, but be bad. When the kit comes, replace the resistors or you may need to do the repair twice, as indicated in post 1.
2008-07-10, 12:46 PM
Yes, definitely will check the resistors with my meter. :D Also will need to see if I have to buy different resistors than what comes with the kit.
By looking at the solder points at the IC's, I think this TV has been repaired before. The solder points on the IC's are not as clean as the rest of the board.
I never mentioned I just got this TV about a month ago. The previous owner was surprised about this. He said he never had any work done on it and he is the original owner. :o
2008-07-11, 10:40 PM
Which kit did you buy? The 56H80 schematic shows different values for the ones in the kit from BD.. Where did you order your kit from?
2008-07-15, 10:19 PM
Some time ago, I was given a 2001-era Hitachi 53UWX10B, that had "convergence problems". I vaguely recall the owner showing me the problem by pushing the Magic Focus button, and seeing all the red, green, blue crosses all being out of wack, especially at the corners. Several months later, I read the posts on this forum about how to do the repair & adjust convergence, tested the six feedback resistors & replaced the two STK392-110 with identical Panasonic (Japanese-made) ICs. I still have the convergence problem, but I don't think I can attempt to do the manual (DCAM mode?) adjustments described on this forum, because the screen is so dark that I can't read the words in the black rectangle that pops up in the center of the screen when I press "Menu". I don't remember if the screen was so dark back when I was first given the TV. The audio, deflection, and tuner sections seem to be working properly, as I can hear and (barely) see programs when I tune to local channels.
I double-checked my soldering work, and don't see any obvious burned components on any of the circuit boards (though there is a small circuit board mounted near the front of the TV, above the power board, that I can't get to, that connects to the convergence board with multiple blue wires).
Does anyone have a service manual they can e-mail to me? I have p-mailed several members who previously mentioned in posts that they had manuals, but got no replies. I cannot find a free service manual on the web. I would also really appreciate any advice. It has been 30 years since I received some TV repair training at DeVry, and very little of it stuck. However, I can follow instructions on which components I should look at. If there is a manual brightness control on a circuit board, please advise. Also, if someone can tell me step-by-step, which buttons to press on the remote or the main panel to manually turn the brightness to maximum, that may help (remember, I can't read the menu prompts, and I've never used this TV before, so I'm not familiar with the operation of it).
THANKS IN ADVANCE FOR ALL HELP!
2008-07-15, 10:22 PM
I have p-mailed several members who previously mentioned in posts that they had manuals, but got no replies.
Most members do not reply to new members who have not posted on the forum and have not contributed to the forums.
Please post your questions on the forum
2008-07-21, 09:17 PM
I got the Hitachi kit with the 394-160's. I don't expect I will be able to use the resistors but the kit should be here tomorrow. I kow for sure that two resistors are toast. I am waiting to see if I will have to buy them or if the correct resistors will be included in the kit.
2008-07-22, 12:50 PM
Well, it looks like only one resistor is toasted. I misread one resistor. Good thing I have someone checking my work. :D
2008-07-27, 02:06 PM
I just repaired my Hitachi 43uwx10b with STK394-160 s and one blown resistor and although I can to the magic focus now, the colors are still not aligned at the top and bottom. I attempted some manual focusing using the service manual, but the grid lines are pretty bowed and do not line up. I noticed in the manual that there are some gun focus rings that can be adjusted, is this something that would be required after the stk replacement?
Do I need to clear the RAM or ROM (not sure which it is called) after the repair? I've done this repair to my Samsung and Toshiba but those were pretty straight forward. Again, I have the service manual and I am not afraid to try any of the procedures, I just wanted to be pointed in the right direction.
Here is a link to some pics of the screen if needed:
2008-07-29, 11:40 AM
I am in the same boat. Finally received the last part on my Toshiba repair and I can't converge anything. The convergence pattern looks like slight bow tie or as if you are looking at a globe from the inside (concave lensish look). When I try to converge it in the consumer mode, it does not display the center cross hair and goes straight to the nine point convergence grid. Again I can only see the numbered points but I cannot see the crosses.
*EDIT: I forgot to mention that when I do the "touch focus" (the Hitachi equivelent of Magic Focus?) The screen flashes "Touch Focus" then goes black and I can still hear sound. I don't see the regular red, blue scan lines that usually go across the screen either.
2008-08-06, 01:25 AM
I received a reply from a Toshiba tech on what resistors are used on the 56H80 and 40H80 convergence IC. The Values are 150 Ohm & 220 Ohm at 2 Watts and 2.2 Ohm, 1.5 Ohm, 3.3Ohm and 1.8 Ohm's at 1 Watt.
He explained that on the Toshiba the 220 ohm 2 watt tend to blow most often.
Hope this helps anyone else with a Toshiba.
2008-08-18, 01:45 PM
I have a Toshiba 57HDX82 with what I believe to be a convergence problem after much reading. The colors are off as well as the screen is skewed or bowed-in toward the center. The auot-focus button comes back in error. I just had the IC TA 1360N board (part 23009132) replaced 90 days ago and I believe this is the same problem. Unfortunately, Electra Sound only has a 30-day warranty on it.
My questions are: 1) Is this a convergence problem? 2) Is this the same part that needs to be replaced? 3) Should I pay $400 to replace this again or just move on? 4) How long do these typically last?
What would you do?