Mitsubishi convergence IC's used in the differant models

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SMorris
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Hey larry its stephen again. 

Hey larry its stephen again.  I replaced those ic's and I am still having the same problem.  I appreciate your comments on my questions before and just wondered if you would know the best place to buy those fuses and pico fuses from.  I did not buy the service manual for my t.v.  I just found the ic's and replaced them.  If you knew the part numbers for those fuses it would help me out alot.  If not I guess I will just have to buy the service manual since I do not see these fuses or pico fuses.  My tv is the Mitsubishi VS-55707.  Thank you so much for your help.

rls in pa
rls in pa's picture
I have a Mitsubishi WT-46805

I have a Mitsubishi WT-46805 TV with convergence issues. I cant use the factory restore setting and the advanced option does not work. I see that it might be the convergence IC's. Where inside the set can I find them?? Diagrams could be sent to my e-mail. Thanks

Larry Dillon
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SMorris, I do not have that

SMorris, I do not have that service manual and I do not have a clue what the fuses designation markings on the board is.  On almost of the other TV sets, or shall I say the Mitsubishi sets, the Convergence power supply fuses that go bad in the main power supply is marked F9A04 and F9A05. I cannot say for sure if this is the same but it would not hurt to check this out.

mikefromblackrock
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Dear Larry,

Dear Larry,

I am new to this site and am glad I was able to find it.

My problem is with my Mitsubishi WS-55905 projection TV. The blue convergence is off, creating a trailing effect in the picture. I haven't done much testing to determine what is the exact cause for the problem, but I would imagine it is the IC part.

Through reading the thread (boy, loads of great info and knowledge I gained), please confirm that the correct chasis for this model is: V16 and the IC p/n is: STK392-040      I found the right IC parts on the link noted in the thread and will order today to take a stab in fixing myself.

Also, are their any  other hints or additional parts I should replace at the same time? WE really love the picture the Mits produce, and do not want to junk before trying to save it. I think the picture is still better than whats out there today.

Thanks and enjoy reading your comments and help!

Regards,

Michael

mikefromblackrock
mikefromblackrock's picture
Dear Larry,

Dear Larry,

Hello. I added a comment to this thread in regards to my Mits. WS-55905. I am new to this site, and hopefully am adding my question for info in the right spot.

The problem is in regards to my blue convergence being out of whack. I have not done any tests to determine the problem, except for doing aq cnvergence test, which I am unable to correct the blue.Reading all the info on this sight leads me to believe the IC part must have went bad. This is the first problem we have had with our Mits and want to fix instead of putting in the scrap heap.

Can you help?

Thanks!

Michael

Larry Dillon
Larry Dillon's picture
Michael, I do not seem to be

Michael, I do not seem to be able to locate this service manual. If you would like to get it and send me a copy, I will see what I can do to assist you with this repair. Go HERE to download a service manual for your TV set. Also, do you know how to solder and have the desoldering skills to work on printed circuit boards? If not, do you know anyone that does as it is very easy to ruin the board with bad soldering skills.

mikefromblackrock
mikefromblackrock's picture
Larry Dillon said: Michael, I

Larry Dillon said: Michael, I do not seem to be able to locate this service manual. If you would like to get it and send me a copy, I will see what I can do to assist you with this repair. Go HERE to download a service manual for your TV set. Also, do you know how to solder and have the desoldering skills to work on printed circuit boards? If not, do you know anyone that does as it is very easy to ruin the board with bad soldering skills.

Larry,

Thanks for the reply. I'm not sure if you noticed my other post, but reviewing this thread, i believe i found the right IC parts I need. Could you confirm that for this model TV (Mits. WS-55905), that the chasis is V16 and the IC p/n is: IC8D01 & IC8D02. One of the links you supplied had the parts in stock, Sanyo # STK 392-040.

As far as soldering skills, I am pretty decent, however, my brother is a pro, with his background being in video and amusement vending business.

I will find a service manual for this model and e-mail it to you. Any other info you may have would be greatly appreciated.

Thanks!

Michael

Larry Dillon
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Those numbers sounds about

Those numbers sounds about right. Best way though would be to open up the TV set and look on the heat sink of the STK numbers.

mikefromblackrock
mikefromblackrock's picture
Larry Dillon said: Those

Larry Dillon said: Those numbers sounds about right. Best way though would be to open up the TV set and look on the heat sink of the STK numbers.

Dear Larry,

I just received my service manual I ordered for the Mitsubishi WS-55905 we have discussed.

I have it on an PDF file, containing the 158 pages to the manual.

I guess I am not computer savvy enough to figure out how to attach it to this e-mail. Perhaps there is a direct e-mail address I could be told, so I can send you or Techlore the file.

Once received, if you could "zoom in" to the section that would help me in fixing my blue convergence problem that we have discussed.

Thank you very much for all of your help and assistance.

Regards,

Michael

Larry Dillon
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Michael, you can send it to

Michael, you can send it to techman32k@yahoo.com

JStiers
JStiers's picture
I have a ws-65313 about 3yrs

I have a ws-65313 about 3yrs old. It will not come on unless I unplug it for an extended period of time. Then it will work until I shut it off, then I have to unplug it again. My question is this; can this be caused by a bad DM board? Mine does not have the caps everyone is talking about, it has the small silver button caps. There are no obvious signs of shorted caps, all fuses are good. I have been trying to find someone with the same problem on this particular model but so far have not.

Any help would be appreciated.

JOEVARD
JOEVARD's picture
jamesb69 said: I have a ws

jamesb69 said: I have a ws-65313 about 3yrs old. It will not come on unless I unplug it for an extended period of time. Then it will work until I shut it off, then I have to unplug it again. My question is this; can this be caused by a bad DM board? Mine does not have the caps everyone is talking about, it has the small silver button caps. There are no obvious signs of shorted caps, all fuses are good. I have been trying to find someone with the same problem on this particular model but so far have not. Any help would be appreciated.

 I have a WS-55313, which is basically the same as the 65313; at least according to the manual. I have a similar issue. The TV will power on and then immediately off. I get the blink code 2-2, circuit short protect error.

 I have opened the back and looked for bad caps, etc.. but I cannot find any faulty components. Any information anybody has on this family of Mitsubishi would be much appreciated.

wrwelect
wrwelect's picture
Larry I picked up the IC's

Larry I picked up the IC's from the site you reccommended they worked great thanks for all your help and advice, it saved me 400$

JStiers
JStiers's picture
You replaced the IC's. what

You replaced the IC's. what was your model number and error code? or symptoms??

Larry Dillon
Larry Dillon's picture
sap29, you will not"see"

sap29, you will not"see" faulty components in a solid state set unless they are really burnt up, and that is not how mot components fail. Your complaint is most likely the convergence IC's. I say most likely because I have seen this symptom many time, and the cause were the IC's. I have also seen this problem to be in the power supply board., This is where troubleshooting skills come into play. You really should call in a tech if you have no solid state repair experience. I just had a guy who tried to change his own IC's and ruined the printed circuit board. It will, if he decides to have the set repaired, many hours of hard wiring the IC's, both of them, back into the main circuit. You need good soldering skills when working on a set. You could send the entire electrical chassis to ptscorp.com and they will repair and overhaul the chassis for about 300 bucks or so. You need to call them to find out. Good Luck with your set.

JOEVARD
JOEVARD's picture
Larry Dillon said: sap29, you

Larry Dillon said: sap29, you will not"see" faulty components in a solid state set unless they are really burnt up, and that is not how mot components fail. Your complaint is most likely the convergence IC's. I say most likely because I have seen this symptom many time, and the cause were the IC's. I have also seen this problem to be in the power supply board., This is where troubleshooting skills come into play. You really should call in a tech if you have no solid state repair experience. I just had a guy who tried to change his own IC's and ruined the printed circuit board. It will, if he decides to have the set repaired, many hours of hard wiring the IC's, both of them, back into the main circuit. You need good soldering skills when working on a set. You could send the entire electrical chassis to ptscorp.com and they will repair and overhaul the chassis for about 300 bucks or so. You need to call them to find out. Good Luck with your set.

Larry,

  Thank you very much for the follow up. I admire your graciousness and patience helping all of us who own these TV's on this forum. You  have convinced me to have it fixed or just see if someone wants it, and let them deal with it. Thanks again.

Shananmb
Shananmb's picture
I have the WT-42311.  The

I have the WT-42311.  The screen was expanding and contracting (like zooming).  It would also occasionally turn itself off.  Eventually the red convergence went way off and was uncorrectable.  After reading several posts on convergence problems my uncle changed out the STK392-110's with a pair of STK392-150's (it was said to be able to handle more power).  The convergence is now great.  However after having the convergence fixed for a week, today it did the zoom in then turn off 3 times.  After the set is warmed up it doesn't do it again.  Any ideas on where to look next?  We were thinking an over voltage somewhere in the power board but don't have the testing equipment to check each capacitor.  Is there one that seems likely or has been a common problem?

Thanks,

Shanan

rls in pa
rls in pa's picture
I have a Mitsubishi WT- 46805

I have a Mitsubishi WT- 46805 projection TV. I replaced the convergence IC's trying to correct the convergence problem. I still am unable to use the set-up auto convergence to correct the problem. Everything else works fine. Good picture but a picture that is tall at the sides and narrower in the center. Your help is appreciated.

Larry Dillon
Larry Dillon's picture
Shanan, I'm afraid that a

Shanan, I'm afraid that a problem like this might be a tricky one to find. The problem is that it does not happen all the time. You might be able to find a voltage drop or change when tapping on the sweep or power circuit, or by heating up or cooling down certain sections of these different circuits. But for a handy person or a novice at electronics, probably not possible to track down.  Good Luck

berniew
berniew's picture
Hi Larry,

Hi Larry,

I have a Mitsu WT 42313 and appears to have a covergence circuit issue similar to what others here discribe. Mine specifically distort the picture for about 2 - 3 inches on the left of screen throwing a "ghost" picture in the three colors and sometimes the picture goes into a bow. I heard you might have the manual / procedure for replacing the covergence circuit stk394-250? My email is bwilsenach@gmail.com

I see the STK's are sony is this correct?

Where would be a good source to buy it from. I see them anything from $7 - $30.

 Thank you,

Bernie

Larry Dillon
Larry Dillon's picture
Yes Bernie, if does sound

Yes Bernie, if does sound like there is a convergence problem with your TV set. If your set has the STK394-250, and there are two of them in this TV set but I do not have any how to do instructions for this procedure but if you can solder on solid state printed circuit boards, the job really is not that difficult and you can save several hundred bucks by doing it your self. If you do not know how to solder on printed circuit boards or have no experience whatsoever, play it safe and find someone who does or have a pro do the job for you. If you overheat the solder pads on the IC's you could ruin the printed circuit boards. No on another note, the IC's are not made by Sony, they are made by Sanyo and you really have to be careful where you buy the IC's from. A lot of the IC's you see out there that are less expensive, like the 7 to 15 dollar range are most likely cheapo after market types or the factory rejects. ONLY USE TRUE SANYO REPLACEMENTS!! I buy my IC's from HERE. Also, before you install the new IC's onto the large metal heat sink, apply a good layer of heat sink compound onto the backs of the new convergence IC's.  Good Luck with your repair.

berniew
berniew's picture
Thanks a Mil Larry, I have

Thanks a Mil Larry, I have repaired other circuit boards before so think I can wing it. To pay someone $500 to do it is worth failing and buying a new TV for $700! Thank you for the link to your source for IC's. It is great to see someone sharing knowledge like this. I will report back on my outcome.Wink

Larry Dillon
Larry Dillon's picture
Great, and good luck with

Great, and good luck with your repair.

Lorens
Lorens's picture
hey larry i meant my
hey larry i meant my Mitsubishi VS-60805 tv monitor/screen/piuture display slowly started bending and getting distorted until after a while it turned pitch black. i unpluged the power cord and turned the tv on again and the monitor/screen picture was back and just fine. but 10min later the same thing happened. i can still hear the audio/sound of the tv/chanell though. i found the STR... convergence boards... but before i order the new ones and dig into it i just wanted to get an proffesional confirmation that the problem of mine is the convergence boards indeed? i noticed just like you said on the forum replacing those IC is a very tidious/time consuming soldering task. is there anything you can recommend/confirm me to do?
PS.: I'am also gonna try to find the Convergence power supply fuses that can go bad in the main power supply marked F9A04 and F9A05. anybody knows where tose are or anybody got manuals?
thanks a lot,
Larry Dillon
Larry Dillon's picture
If you look on the chassis

If you look on the chassis from the back of the TV set, You will see a larger board on the left side of the main TV chassis, and a smaller one on the right side. Now looking at the smaller board, only the smaller board on the right side of the chassis, that is the power/deflection board. On the right side of this board only, near the middle front of the board, you should see those on board fuses. They do not look like a typical round metal fuses. They could be black, green, or yellow in color. You should see the marking on the board where they are. I have added a link on soldering, in case you are not famiular with it. GOOD LUCK!

http://www.techlore.com/forum/thread/17742/sony-KP-51WS510-convergence-ic-help/?page=10#30298

smc57
smc57's picture
Larry,  I replaced the 2

Larry,  I replaced the 2 convergence IC's 5 months ago and it's been like new! The day before Superbowl my Mits ws55809 won't power on. It shows 2-2 on service codes. Also when plugged in AC there is no 3 LED flashes. My service manual says is no 3 LED flashes the microprocessor not functioning. I've read many posts that say possibly needs  TDA8177(IC4B01) Vertical deflection booster. I ordered that and more PICO 5a fuses incase F9A04 & F9A05 are open. Do you thing I'm going in the right direction?  

Larry Dillon
Larry Dillon's picture
IF FA905 or FA904 is open,

IF FA905 or FA904 is open, you have a convergence problem. Where did you get the the replacement convergence IC's from?

smc57
smc57's picture
Got them from Bluestar

Got them from Bluestar International Components- Blusestar-online.com--it's been wroking fine since it installed them.  The difference I've noticed this time is now when AC is plugged in I don't get the 3 LED flashes showing the microprocessor is working properly.  

Larry Dillon
Larry Dillon's picture
If Sanyo is not written on

If Sanyo is not written on them, they are aftermarket type IC's or factory rejects. And that's why they did not last long.  Also you need to scrape off the old heat paste compound and install new before installing the IC's.

SMorris
SMorris's picture
Hey larry, this is stephen

Hey larry, this is stephen again.  I dont know if you remember but I had talked to you about me thinking that my ics went out.  I replaced them and I had the same problem.  You had told me that you thought that it could be pico fuses or fuses that may have went out.  I did not have the manual at the time but I have downloaded the manual now.  If it would be helpful I will email you the manual.  It is good for many different manuals.  That way maybe if someone needs help in the future you will have access to the manual.  Another thing if you want me to send it to you, would you varify and see which fuses you think it would be.  Thank you

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