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June 9, 2007 01:32 PM

Categories: Televisions and Projectors

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Barbara Johnson

Joined: 06/09/2007

My 7 year old panasonic hdtv rear projection tv started showing a double image  2 days ago. The red color is also a little too pronounced. I recently had high  def service added to my satalite service. The double images started all of a sudden. Any information would be appreciated.


Discussion:    Comments 51-75 of 88 | Latest Comment | « Previous 1 2 3 4 Next »

March 7, 2010 6:50 PM

I have a Panasonic PT47WX49E. Color convergence problems, so I replaced both convergence correction parts (STK392-110). Like many others in this forum, the tv now comes on briefly (no picture) then clicks off. Must unplug to try again. Larry has indicated he would email a fix to those with this problem. Larry, if you are still tuned in, please help me out! jpmac88@gmail.com

If any other visitors to this forum received that fix via email from Larry, would you please share it with me? Thanks!

And please hurry -- my wife is trying to get me to spend 2K to buy a new LED LCD -- which is very tempting, but I need to fix this tv regardless!

March 8, 2010 1:00 AM

make sure you replace the ic's with only original Sanyo or Sony replacements IC'sand you really should get the kit as you get only the original ic's fuses, grease for the backs of the new ic's as well as many of the original flameproof resistors as well as the clear-easy to follow directions , The best advice I can tell you at this point is to go to TV repair kits.com and order the complete convergence kit for your model of TV set, click on here please: http://www.tvrepairkits.com/xcart/home.php?partner=larry
no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK IC'S , not those cheap aftermarket or china made IC'S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases,

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

March 8, 2010 3:39 AM

Thank you very much, Larry for the quick reply. I'll try it!


March 13, 2010 2:09 PM

Bada boom, bada bing! It worked! I bought the kit with original parts. I didn't need the resistors, but did install the new STK392-110 parts. I think I had bridged a couple pins with solder in my first fix, not sure. Had to reset convergence. Then I turned it off to hook up components and close up the back. When I turned it on again, I had to reset convergence again! But no problem after I turned it off/on the next time. I hope it remains fixed!

I just saved about $400 for the repair, but more importantly, I saved $2400 by not buying the new Samsung LED LCD 55" 240 Hz beautiful tv! Yeah, we have been studying and shopping as I waited to get the parts. If the fix did not work, then I'd be working overtime to pay for a bigger fix!

Thanks for your help Larry. Your "partner" site was very helpful with the photos and instructions tailored to my model. Good job.

jpmac out

March 14, 2010 5:45 AM

great if you follow the instructions to the letter the kit will work 80 to 90% of the time!!!!! the biggest problem is solder shorts on the ic's or solder splashes on the board!
Larry Dillon

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

March 14, 2010 5:47 AM

If you have any suggestions to make the fix easier or better please share!!
Larry D.

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

March 23, 2010 9:18 PM

BobbyZ said:

PT 47WX49E powered off - won't turn back on. started as switching off problem. If convergence board, please help with diy fix. I am without TV and can't afford service call let alone couple hundred to fix. I am a former Motorola Service Tech with soldering experience on circuit boards. Thank you to all the pros that assist with DIY'ers. oceanstereo(at)yahoo.com

Thanks to Larry and another forum member, this repair has finally been completed. I ordered the kit from Larry's recommended site and replaced the 2 convergence chips and 1 resistor and the set came on fine - barely any convergence adjustment needed.

Courtesy - if you post a question, post the fix.

April 26, 2010 6:37 AM

Auto diagnosis feature
This receiver incorporates a new auto-diagnosis
feature. With this new feature will be easier for the
technicial to detect the failures. There is a LED located
by the keyboard on the front panel, this LED will start
flashing when a failure is detected by the circuits
located in specific areas, depending on how many
times the LED is flashing, this will tell you what circuit
should be checked.
Make a count of flashing and see Table 3.
Please use this feature effectively especially for
intermittent problems.
Table 3: SOS of front LED
After the count:
Proceed to check that area, verify what board is the
problem located, this way the area to check will be
reduced until the failure is found.
1 +140
5 IC4011
6 IC4018

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

April 26, 2010 10:51 PM

look at the post above please!!
Larry D.

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

May 10, 2010 10:55 PM

Hey could you help me with a problem. I replace the convergence chips on my panasonic pt 47 43G Rear projection tv. Before I worked on it picture with convergence problem after i fixed it No picture sound or anything except the blinking red light. What did I do wrong?


May 10, 2010 10:57 PM

Ok here is my problem I ordered and replace convergence chips on my PT 47 43G panasonic rear tv after reassembly i have no picture or sound. What did I do wrong?


May 10, 2010 11:09 PM updated: May 10, 2010 11:11 PM

doble check that there are no misplaced or forgotten plugs and or connecters, and triple check to make sure that there are no shorts on the ic's or solder splashes you replaced and that they were the same numbers and also check all the fuses for continuity as there should be a label inside the set where and the fuse numbers are on one of the sides if this was a kit and you still have a problem please go to tvrepairkits.com/helpdesk and start a repair/trouble ticket please

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

View unverified member's comment - posted by rc69fab

May 14, 2010 11:10 PM

is the green light flashing three times?? Larry Dillon(AKA)

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

May 14, 2010 11:12 PM

unplug the set and plug it back in does the light flash now?????
Larry D.

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

View unverified member's comment - posted by rc69fab

May 15, 2010 6:13 AM

Larry it sounds like you missed one of the fuses in the power supply chech them all for full continuity please let us know??are you sure you do not have any solder shorts on any of the many pins /connections you had to unsolder and resolder??there are two fuses in thevmain power supply that go bad maybe even small resistors inline with the fuses Look for small burn marks or scortching on the small resistors, you cannot look at the small glass fuses you will need to test the continuity with a meter the meter should have a tone type continuity tester on it if you do not see it please tell me what brand and model number of tester do you have??also lrt us know if it is a neddle type meter you have also or is it an electronic type of meter if you do not have one you will need to borrow one and ask its owner how to check continuity THANKS!!
Larry D.

"Those who do not know their opponent's arguments, do not completely understand their own".**For complete TV repair kits including parts goto www.TvRepairKits.com

May 15, 2010 6:58 PM

Hi all, I have a PT-47WX51E that I just replaced the convergence IC's on. Everything works great but the set could use a major tune up, and my service manual is hardly readable. I found the first simplified manual in the resources section but when I tried to download the "etc." download for the PT-47WX49E (same chassis) it wouldn't complete the download. If anyone could send me or provide a woking link to the extended service manual with all the convergence and set up details I'd really appreciate it. Thanks in advance.

May 17, 2010 11:23 PM

Hello Larry,

Sounds like you are quite the helpful guy.

My roommate has a Panasonic PT-47WX49E television that is experiencing the same problem you have e-mailed others about.

The TV turns on just fine for a few minutes, then shuts itself off. The LED does not blink at all after doing so, it just powers off.

If you can provide any help for us, that would be really helpful! Not too excited about the idea of buying a new tv....

my e-mail address is lucas.c.simmons@gmail.com

Thank you so much for any help you can provide!

May 30, 2010 1:28 PM updated: June 12, 2010 1:57 PM

I got my Panasonic PT47WX49E up running, tuned up and dialed in nicely with a few minor exceptions that have some questions about.

First is the color decoder options in the service menu R-Y_A which is listed as the yellow tint adjust when changed to 00 balances out the red in the yellow and eliminates the orange cast that that the factory setting has so that one was rather easy to figure out. Where I'm having trouble is with the B-Y_G decoder adjustment, which is listed as the magenta tint adjustment. It’s kind of unclear to me where to best set this to get accurate color decoding. If all but the blue CRTs are turned off with a color bar pattern and then the B-Y_G is  adjusted, it appears that it changes the level of blue in both magenta and blue, where as the R-Y_A adjusts the balance between red and yellow making it very easy to set properly with only the red CRT running. Can anyone tell me what the proper setting for B-Y_G is to get accurate color decoding? 

I've found instructions on how to set the beam astigmatism, 2 and 4 pole magnets, the problem is this TV seems to be somewhat of a oddity, making those instructions near impossible to follow. From the CRT drive board going up the CRT necks the first rings that are supposed to be the 2 pole magnets do absolutely nothing, the service manual calls these the "alignment magnets". The rings that are supposed to be the 4 poles seem to be right and adjust the beam roundness. This set also has a third set which should be 6 pole these seem to move the dot pattern all over, left right up down, the service manual calls these "6-pole magnet (Dummy ring)". From what the SM says it almost seems like during assembly they installed the SVM assembly up side down, on all 3 CRT's, or installed the tabbed magnet rings in the wrong order on the assembly. Is this possible? The service manual for this set is only a partial manual, the rest of the manual Panasonic has you refer to a manual from an older set, I guess because what wasn't included in the manual for this set is the same as the older set they have you refer to.

Another issue I have is the convergence has a small amount of drift, not a lot just enough to need adjustment for perfect convergence. I've noticed that if I turn off the digital convergence to adjust the H-DEF and V-DEF settings it looks as if the TV was never set up properly i.e. corner, pincushion, trapezoid correction was never done, rather whoever did the initial set up went straight to digital convergence. Here’s my question is this causing undue stress on the newly replaced IC's, should I do a complete set up from scratch? This could be quit time consuming and a big project so if it’s not going to hurt the IC's, and it won't correct the convergence drift, I'd prefer to not get into it.

I've read on another site that this TV set has a designer menu; however the site doesn't tell you how to access it. There is suppose to be some edge enhancement settings that work in conjunction with scan velocity modulator that should be turned off when the SVM coil is disconnected. How can you access this menu and a list of parameters would be fantastic, hopefully you can unlock all the 480p & 1080i service menu controls.

Does this set have any controls that can correct gamma? This set seems to come out of black very slow, if I make video black output no light you can't see the pluge bars above video black in that test pattern. Maybe something in the designer menu that’s not in the regular service menu?

Lastly the screen variable resistors, the service manual states to adjust them by viewing the tubes directly with an all black pattern and adjust for minimum noise level in the green raster and match the others to it. This is the strangest method I've ever seen  in a manual to adjust the screen VR's especially since the service menu contains no green cuts and drives so the balance between all the CRT's has a huge effect on the grey scale. Mitsubishi has you measure the cathode voltage at a test point, which seems like the most accurate way to me. Does anyone have a more accurate way to adjust these?

July 6, 2010 9:19 AM

I have a PT-56WXF95A that has symptoms that many others have posted. I turn it on and after 2-3 seconds it shuts off with a "click" sound in the back. No flash or color on the screen at all. Am I looking at a convergence repair kit?

July 6, 2010 9:54 AM

My magic 8 ball says - very likely - rwlinder44. Follow the instructions carefully and properly desolder the chips and be very careful soldering the new ones in. Also, keep in mind the high voltage in these machines and be safe.

July 7, 2010 10:42 AM

I just ordered my convergence repair kit....I will update the forum once I install it and test.

July 19, 2010 1:52 AM

Angelzplay said: I just replaced the convergence IC's with STK392-180's. The picture is perfect now but the TV powers off after a few minutes and it won't come back on unless unplugged. Then it does the same again. Can someone help? My guess is that I need to replace a fuse or resistor but I have no idea how to find which ones.

If the TV worked normally before the visible convergence failure and replacing with STK392-180 ICs produces a normal picture for a short period of time, then shuts-down, don't use 180 substitute ICs.  It is not the same as replacing a 60 watt light bulb with a 100W light bulb.

The TV shuts down because the 180 ICs produce higher "idle" current.  The power supply safety protection circuit detects the excessive current and shuts down the TV.  Unplug reset is required after safety circuit is triggered. Many times the 180 or 150 substitute ICs will cause the low ohm resistors to burn up. If you still have a "normal" picture while it runs, all resistors and fuses are ok.

Proof is to remove the 2 X 180 ICs from the circuit and run the TV.  All will be fine except for a wildly distorted image with misconvergence.  TV will run without shutting down and on-off will work normally.

Panasonic engineers are very clever, they have designed and built 10's of million TVs. Panasonic does not tell you to substitute 110 ICs with 150 or 180 ICs, only an Internet IC salesman who has never fixed Panasonic TVs will tell you this. If the salesman has fixed Panasonic TVs, he will know that this does not work.

Replace the STK392-110 ICs with 110 or 120 ICs only. (120 specs are very close to 110).  Hitachi factory service will recommend a substitute for STK392-110 IC, but only if all low ohm resistors are changed to different values.  The circuit must be re-designed to handle the extra current. Occasionally the 180 or 150 ICs will work and produce pre-mature failure of the low-ohm resistors or intermittant power supply safety circuit shut-down

The fad a few years ago was to install extra fans for cooling to compensate for poor quality or incomplete repairs and poor quality replacement ICs causing multiple failures. Now the fad is to substitute the wrong ICs for STK392-110s.

Wrong spec spark plugs may physically fit and appear to work in a car engine but valves can be damaged and performance will suffer. Wrong Convergence ICs may appear to work in your TV but problems (pre-mature failures) occur in many instances because the convergence circuit is designed for specs of the original part.

Our service department does many successful convergence repairs across Canada on different makes of TV on a daily basis. We always try to use the original parts that the circuit was designed for and do not heed the advice of the Internet salesmen regarding substitution of STK ICs. 560 ICs are no longer available so 570 are used in Sony, 110 ICs are not widely available and 120 will work because specs are very similar.  Substituting 150 or 180 ICs for 110 ICs causes problems unless the circuit is re-designed and different value low ohm resistors are used (as specified by Hitachi).

Many ICs sold on the Internet are defective and will not work or have a very short life-span. The ones that have bright, clear, printing and flimsy leads should only be used for target practice.



October 18, 2010 1:12 PM

Larry Dillon said: Typical convergence problem.  Since you left no model number, all I can recommend is you open the set and find the two large black rectangle IC's, about 2" by 3",  mounted up against a large metal plate, and they start with the letters STK and have several numbers following them.  These are the convergence correction IC's and are soldered into the printed circuit boards.  If you have some experience soldering and unsoldering on printed circuit boards, you should have no problem changing these parts.  If you do not have any experience, I would have to guess, since I do not have a model number, this will run you between 300 to 400 bucks to have a pro repair it for you.  If you think you can handle this repair, feel free to ask any other questions about this repair.  And please include a model number.  Good Luck.
i changed my ic's on my panasonic pt-47wx49e, because i had the same problem. i am new to soldering and fixing electronics, but i wasnt about to spend 300 on getting my tv fixed for something that seemed easy enough to do on my own. so i changed the chips and now my tv only turns on till the picture comes up then shuts right back down, i have to unplug and replug the tv in for it even to try to turn on again. any ideas of what i might have messed up?

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