Question about Philips 55PP9753 55" Rear Projection Television

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Philips 55PP9753/17 DPTV350 Red gun not aligned purchased two STK392-120 to fix but found 2 resistors burnt at 3153 and 3154. One resistor I can read a little to find it is a 6R8J at location 3153 but 3154 has color band not like the other. How do I find out the other resistor for replacement?

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  • jwhiteaker9 Sep 11, 2009

    One resister has band but badly burned and the other is the 6.8 or 6R8J. Could not find these at RadioShack. Had to call TV Company (friend) and he is getting me the right parts. These two resistors are not the same at 3153 and 3154.

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3149 -3160 Resistors are all 6.8 ohm 1watt resistors

Posted on Sep 11, 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

Samsung HCM4216W 42 in. Rear Projection Television Not turning on. After opening the back, found out that two resistors (RR402S and RR471S) are very badly burnt. Could that be the problem? I took the...


Sounds like your convergence circuits shorted and took out the resistors. This is fairly common.

This is a common problem. Its called a convergence failure.

Problem #1) Convergence

Symptoms:


  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms

  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 19, 2010 | Samsung HCM4216W 42" Rear Projection...

2 Answers

Panasonic PT-47WX49 convergence amplifiers


check R7059 and R7050
check for 2.2 ohm.
if not 2.2ohm replace them.
values are 2.2ohm at 2 watts
also look for bad soldier around all serounding resintors.
.

Jan 15, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Zenith R60v26 has burnt resistor at RK5 on convergence board


Hello, I have the exact same issue with my R49W36, I replaced the convergence chips but there are also two 1 ohm resistors with the same color pattern as yours that are bad. I have looked all over and cannot find a 1 ohm resistor anywhere. Where did you find it?

Dec 31, 2008 | Zenith R60V26 60" Rear Projection...

1 Answer

Phillips 60in projection,rred/greenish 3d effect


the two resistors were likely burnt out with a convergence IC (chip). these are usually a stk392-120 on a philips, or simmilar. the alignments can be very tedious and difficult. what needs to be done is replace the ICs that control the colors that are mis-aligned. you might see that the green is square and straight, but the red or blue is off. in most cases, i would just change both convergence ICs plus the bad resistors. then go to your full re-alignment of convergence to fix the picture. hopefully the previous owner didn't mess anything up too much (if they changed anything on the CRTs ie yokes, lens focus, centering magnets it could counteract your electronic adjusments). before you put too much time into it, look to see that all 3 colors are atleast focused and it appears that the CRTs have been left untouched. once you get circuit repaired, you will probably want a service manual to help with alignment. this complexity may bring you to want to just pay for this repair, could run you anywhere from $200-400 depending on severity and local rates.

Dec 07, 2008 | Panasonic PT-51HX41 51" Rear Projection...

2 Answers

WILL NOT TURN ON


Sir;

friend of mind had the same model # and he give me the color band for the resistor

Nov 18, 2008 | Yamaha HTR-5560 Receiver

1 Answer

Red Offset Image


yes the convergence ICs need to be replaced they are both STK392-120 ICs and you will also need four 6.8 ohm 1 watt resistors you can get replacment ICs and resistors at the following link and they provide free instalation instructions with pictures and free on line instant messageing to help you do the repair yourself. Heres the link.
http://servicemanuals.vstore.ca/

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3 Answers

Need resistor value for RK62 on DP2X board for 57SWX20B


RK62 is a 2.2ohm 1 watt metal oxide resistor hitachi part number 0700054M any 2.2ohm 1 watt resistor will work although it does have to be metal oxide(flame resistant) for safety purposes.

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2 Answers

Burnt resistors


Researching resistors---

What caused the resistors to burn?? Have you already fixed

that? If so, what exactly was it ???   let me know...T.

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