Question about Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television

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Check Factory Data after fixing convergence and resistors

I have seen many people post this problem and nobody has posted a fix. After replacing the chips and fusible resistors, you can no longer use the self focus. Here is what worked for me. After going into service menu, press self focus, tv will start to run a focus routine, when this was done i hit s mode to exit and self focus worked afterwords. No more check factory data appears and tv works great. Hope this helps the many people with this issue.

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  • helpme380 Jun 04, 2008

    i my tv say check factory data

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Plugs on the chassis coming from keyboard and side video input are switched (they have same plug)
redoo convergence save and auto focus in factory mode after switching plugs

Posted on Mar 05, 2009

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I have a 53 inch hitachi ultravision #53UDX10B Its out of focus and when you press the magic focus button it trys then pops up with the # 4 in the corner is this a convergence problem or what ?


Yes, you have a convergence failure. Usually requires replacement of 2 X STK ICs and any burnt resistors associated with the function that is faulty.

Look at the user menu and compare with images on our Convergence Gallery. Try to adjust in the convergence adjust menu. Identify the functions that do not work and make note. When you replace the ICs, pay special attention to the low ohm resistors for the non-working function. They will be located near the colored plug associated with the non-working function. If red vertical will not adjust, check resistors near the red plug.

There are many posts and websites that offer "new and improved Convergence IC substitutes. My advice is to use the original part numbers and replace any burnt resistors with original values. Many ICs purchased on the Internet are very poor quality and do not work. Many users get substitute replacement ICs and never get their TVs working again.

If you have other electronics repair experience, this job may be done with some chance of success. If you have no experience, there are many secondary problems that can and usually do appear. Determining how to fix the secondary faults and how to correctly align the TV is difficult without prior convergence repair experience.

Some of the common problems encountered are:
1. Poor solder techniques, resulting in damaged PC boards or poor solder connections.
2. Poor quality or wrong parts installed and recognizing this problem.
3. Resistors open or burnt. Some resistors are weakened by the initial faulty IC. Replacing with a "good" IC and starting the TV causes the weakened resistors to burn up. IC may be ok but there are one or more open resistors that measured ok when ICs were being replaced.
4. Wrong ICs used, causing resistors to burn up.
5. Resistors that measure normal and become faulty when heated by current flow.
6. Recognizing that convergence circuit is repaired correctly and alignment is needed.
7. Major alignment in service menu required because data is corrupted by multiple tries of magic focus or manual adjustment while faulty circuit conditions exist.
8. Major alignment required because user adjusted centering rings or physically changed mechanical focus adjustment, then mis-adjusted convergence settings trying to correct mechanical alignment faults.
9. User has not connected plugs and connectors correctly and caused secondary damage or mis-alignment trying to correct secondary issue.

Physically replacing the ICs may appear simple but recognizing if a fault still exists or if correct repair is required causes many attempts at repair to fail. Keep it simple. Replace with good quality original part numbers, measure suspect resistors and adjust only what is necessary.

There are only 3 things to fix, IC failure, resistor failure and user induced secondary faults. Data processor and memory is bulletproof.

easyab

Apr 22, 2010 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Convergence problem ,Help Please


Something is not right here. Is there any possibility that you can get the circuit designation (Rxxx) of the resistors that were "incorrect"? I am not aware of anything like this that can cause the "memory to be erased". The only memory in that area would be the factory convergence settings which can be modified from the service menu. Please try to supply the resistor IDs and I'll check on this.

Thanks,
Dan

Feb 13, 2009 | Panasonic PT-51HX41 51" Rear Projection...

2 Answers

Akai PT5250A - I cannot converge correctly.


this fixed this problem
Plugs on the chassis coming from keyboard and side video input are switched (they have same plug)
redoo convergence save and auto focus in factory mode after switching plugs

Jan 13, 2009 | Akai PT5250A Television

1 Answer

Picture bends in different colors


your Convergence IC chips and resistors arre failing you need to replace them

below is a general disscussion post for a Philips TV which will help you to understand your situation and what you might need usally you will need (2) IC convergence Chips and usally (12) Resisitors what have to be soldered onthe the board after you remove the old ones. this fix usally cost you to do it yourself $30, to have a repair man do it cost around $300-450 a new board if avalible usally costs $250-300

Sorry, for the bad new I hope you have a friend that knows how to work on circuit boards...
good luck,

below is a general post about a philips TV Convergence problem you can read about keep inmind your CHIP and RESISTORS will proball be different type....

you need 2 Convergence IC's STK392-120's (120's and 150's will work) of course order 2 of the same type I'm using replacement 150's they allow for a little higher heat and were cheaper ALSO you need to replace the 12 resistors with 6.8 ohm metal film resistors, make sure they are metal film! don’t skimp out here I did and then they blew and fried my IC's and I had to replace everything again!

Great reference link that I posted
pictures on, check out page 3
http://www.techlore.com/forum/thread/16736/Magnavox-51MP392H-17-51-quot--TV-has-double-vision/

Where I got my parts that worked:
Suburban Electronics
http://www.suburban-elect.com/
Manual Library you should find all you need here:
http://www.techlore.com/group/2/list_downloads



What you need:
(2) STK392-120 OR STK392-150 IC
chips
(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux

Nov 20, 2008 | Mitsubishi WS-65909 65" Rear Projection...

7 Answers

Picture is warping and colors are seperating giving a picture that looks like a 3D picture without the glasses


you need to replace both convergence Ics. Post the model number of your set and I will post the correct IC numbers as well as alink where you can get replacements with free instalation instructions. Respond to this same post so I will have access to your symptoms when you post the nodel number.

Jun 30, 2008 | Philips 46PP9302 46" Rear Projection...

1 Answer

Zenith red convergence problem.


yes thats the right board if those two resistors are open the convergence ICs will need to be replaced as well. Its an easy repair. Heres a link where you can order the parts and recieve free installation instruction. If you need me to post the STK numbers and values of the resistors

Apr 02, 2008 | Zenith R40W46 40" Rear Projection...

7 Answers

The red convergence is off


replace the convergence ICs post your model and I will post a link where you can get the parts and they include step by step instructions with pictures so you can do the repair yourself takes an hour and will save you about a 400 dollar repair bill.

Mar 30, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Convergence?


From what i see in these posts most say its the IC ship to replace i will get one for my 46807 also but dont know where yet .
also i seen that if that dont fix it then there is a few resistor's to resolder someplace dont know where either..but i can make the repairs myself im handy CROSS fingers ..:)

Nov 24, 2007 | Mitsubishi WT-46807 46" Rear Projection...

2 Answers

Picture issues, not sure what the problem is, photos posted


It looks to me like the green is sagging down at the top, and this means that one of your convergence IC's has stopped working. Instead of replacing the whole module, locate the convergence IC (Samsung typically uses the STK392-040 IC's) that handles Green Vertical (GV) and replace it. Sometimes there is a fuse next to the IC that looks like a small resistor that opens up too. If you do not have experience changing convergence than have a qualified tech handle it for you.

Jul 03, 2007 | Samsung HCM4215W 42" Rear Projection...

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