Question about Panasonic PT-51HX41 51" Rear Projection Television

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Convergence issue Has anyone had success replacing Convergence IC STK392-110 with STK 392-110T or higher current rating? If convergence is most common issue with these units why hasn't OEM gone back to drawing board??!

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So you keep buying new tvs each 4yrs or so..all about money..

Posted on Aug 10, 2007

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1 Answer

Red and blue con


Adjustment or IC replacement---the adjustment with the original remote via the customer menu should be tried first----set if has convergence should use either two stk-392-040 or -020 chips that are interchangeable with the -040 being the higher current part and more expensive.

Oct 26, 2012 | Samsung HCL5515W 55" Rear Projection...

1 Answer

Red and blue convergence


Adjustment or IC replacement---the adjustment with the original remote via the customer menu should be tried first----set if has convergence should use either two stk-392-040 or -020 chips that are interchangeable with the -040 being the higher current part and more expensive.

Oct 26, 2012 | Samsung HCL5515W 55" Rear Projection...

1 Answer

I need an IC Part for the TV. Are these expensive parts and is it a difficult repair job ??


I asume you're talking about convergence IC's? The IC's themselves are about $50.00 total
convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 25, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Red color convergence issue; Red lines are curved


This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 24, 2009 | Televison & Video

1 Answer

My samsung rear projection tv has a problem with its convergence ic. i think theres two ics , but how do i tell which ic need replacing??


Always replace both once your going to the trouble each IC is usually less than $30.
This link will help show you what's involved.
convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 13, 2009 | Samsung HLR5067WX 50" Rear Projection HDTV

1 Answer

Convergence


Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s) JVC usually have a sperate smaller board for convergence

convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 16, 2009 | JVC Televison & Video

1 Answer

Picture distortion


The 040 is a higher amperage part, but will work fine in place of the 010. The 010 will work in place of the 040 also, but will probably not last as long due to the lower current rating.

Jul 05, 2009 | Televison & Video

1 Answer

Convergence


Hello diduni,

Yes you can use them but read this first:

I could not have said it better myself, I keep this around for times like this.
The various IC's have different specs, one important one is the quiescent current. The higher number STKs have a higher quiescent current (+10%) If you replace a STK 392-110 with an STK 392-150 the small value resistors will "smoke" in many cases and have to be changed with different values. The different TV Help blogs are full of people that have put in the "new and improved" ICs then asked what to do now, all the resistors have smoked or the unit will not start. Hitachi has considerable information on the use of these ICs. In all cases they tell you to change the resistors for different values, to allow for the higher idle current. They also include information regarding alignment for minimum idle current in the circuit. This relates to height, width and hor/vert centre.
The design of the TVs is ok, the IC's fail from AC power bumps or lightning (accumulated damage to junctions over time). Semiconductors will run forever if they have a smooth DC power source, are ventilated to operate within temperature specs, and not overdriven. This was demonstrated when com satelites were first used. They had estimated electronic failure in 4 to 6 years and many last 20+ years. They are replaced when they run out of manouvering fuel or get an induced power surge from the sun. When the IC's run too "hot". there is usually a low ohm resistor that has increased in value and causes higher current output from the chip through the feedback in the circuit design. The resistor(s) may have changed from 1.8 ohms to 2.5 ohms, the TV will still run, but the IC will fail prematurely.
STK 392-110 will work fine if all the small value resistors are ok and the TV is not subjected to a hotter environment than normal or power line related troubles. Many RPTVs are mounted in enclosed areas with no air circulations or in direct sunlight. These situations will cause the unit to operate at raised air temperature around the IC's resulting in more failures. Some people have "hotter" houses than others, their convergence IC's will fail sooner.
If you can redesign the convergence circuits and waste your time replacing all the low ohms resistors, go for it. Otherwise use the STK 392-110, or whatever the manufacturer had in the unit. I know from experience. When Hitachi came out with "new and improved" replacement ICs we installed many STK 392-120 for STK392-110 in Hitachi and other makes. The result was many burnt resistors, many call backs and big expense. The same applies to the Samsung STK392-010 or STK392-040. Use the original IC.

This was borrowed from:
http://www.techlore.com/forum/thread/22290/Rear-projection-TV-STK-392-120-LG-convergence-problem/

from: easyab

I hope this helps

Shuttle83

http://www.electron-age-technologies-llc.com

Dec 22, 2008 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

Mistubishi Convergence/video display problem


also check resistor values on the chips and resolder the tuner as this can cause problems as they heat up , then replace any electrolitic capacitors in the video circuts selector ic
i will be back to see what you get

electech

Oct 26, 2008 | Mitsubishi WS-55809 55" Rear Projection...

2 Answers

CONVERGENCE ic CHIP


if you can remove the rear panel assy. look for the convergence ic's they start with stk--- and you got the part number you need a source panasonic is 814 source and the number on the ic's stk 390 ----/

Aug 22, 2007 | Panasonic PT-53WX42 53" Rear Projection...

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