Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Bad Resistor I replaced my convergence chips today but i found a bad resistor I need to Change......But I couldnt get a reading off of it so I don't know what resistor it is...........Its got Brown Green Gray? and Gold Stripe and goes into spot R 850 Does anyone know what resistor to get and where to get it?

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Jonze,
Guess I should have looked to see that you had a second post. I justa answered one and here's some of the answers to my questions..
Brown - green - grey - gold would be a 1500m resistor and I would HIGHLY doubt they used something that intolerent in the convergence circuit... It's more likely to be a 1.5 ohm resistor which is brown - green - gold - gold and the grey you're looking at my just be discolored from heat stress...
Take a look at my previous post and tell me what you find after you make some comparisons.
Bill

Posted on Dec 09, 2007

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2 Answers

Convergence Resistors keep burning up


Some simple advice---if resistors are smoking one of the chips is shorted----The set has two voltages that go to them--one a positive voltage and one a negative voltage.

If either chip is shorted you can replace the resistors all year and not get anything. The resistors are protection in case one or both chips short----

Remove all old heat grease and install two new chips and replace the resistors at the same time.

Note that the set may have pico fuses on the power board also.

Jun 09, 2012 | Sony Televison & Video

2 Answers

Hitachi 57uwx20b


The resistors are all marked with bands which denote the value---just check them with a ohm meter===no need to replace out of hand.

When you replace the chips: remove all the old white grease and apply fresh heat sink compound (thermal transfer grease.

I see lots of people who want to "change everything" and usually get in trouble----for the most part these parts are either good or bad.

You will need the original Hitachi remote when done to adjust convergence in the Decam mode.

Mar 07, 2012 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

I have a hitachi 43FDX15B RPTV It appears to have a convergence problem, I've read about replacing the stk IC's but which resistors need to be replaced and what are the values on the DP15k/08 Board?


This model uses two of the STK-392-120 CHIPS and here are most of the usual resistors to suspect or check:

Hitachi AT03411S RK43 RESISTOR Hitachi AT03608S RP22 RESISTOR Hitachi AT03195S RK46,RK54, RK62 RESISTOR, 1.8OHM 1W Hitachi AT03857M R815,R865 RESISTOR, 1/2W 100 OHM Hitachi AT03191S RK50 RESISTOR, 1W 1.2 OHM Hitachi AT03197S RK50 RESISTOR, 1W 2.2 OHM Hitachi AT03199S RK41 RESISTOR, 2.7 OHM 1W Hitachi AT03202S RK42 RESISTOR, 3.3OHM 1W Hitachi AT03204S RK58 RESISTOR, 3.9 OHM 1 WATTThe RK ones are all marked on top and bottom of circuit board---usually if one is bad you will be able to see it is discolored---all are very low value and should read open or good only.

This is a fairly easy set to do this on---the whole convergence board (right side from the back view) is held in with 3 screws and an assortment of plugs--3 plugs are identical (convergence yokes and you need to mark so you get each back in same place)

A row of black snap plugs on the left side and with the screws and other plugs removed the board will lift up and out of the set.

DON'T waste your money on one of the "kits" being sold on the net---you can buy a pair of the chips for about 12 dollars on Ebay and usually only one (if any) of the resistors will be bad---those kits sound like a good idea but at 50-80 you are buying things you will not likely need to repair the set.

Let me know if you have any questions and if this information helped you rate this solution as I do this here for free.

SD TECH


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Dec 17, 2009 | Hitachi 43FDX15B 43" Rear Projection...

3 Answers

Our TV has, almost what appears to be, a double image suddenly. any ideas?


This sounds like a convergence problem.

If model number is AV48WP30 go into the customer menu and select CONVERGENCE---if Red or Blue will not move in some direction one or both of the two STK-392-110 CHIPS this set uses for convergence is bad.

What happens is the convergence chips are black in color--about 2 1/2 inches wide X 1 1/2 inches tall with 18 pins each----the back of each is metal--when they are installed(each is mounted to a metal heatsink to keep it cool) they apply a white grease to transfer heat quickly----

After some years the grease dries out and one of the chips overheats and fails.

Not a real hard repair to do if you are handy and know how to solder----

Most shops are going to charge about 300 or more for this repair-----considering you can buy all the parts for under 25 dollars if you or someone you know can do it you can save a lot of money.

I can give you general instructions for this repair on this set.

I have repaired hundreds of sets with convergence troubles--very common problem.

Let me know if you have questions or need advice.

Regards, SD TECH

Oct 28, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Convergence bad


resistor along the convergence are 2Watt size or less. they are easy to find as all of them are in pairs. if you find one is not the same on the other, then replace that resistor. change the 2 convergence IC at the same time. let us know.

Mar 22, 2009 | Philips 43P8341 43" Rear Projection...

2 Answers

Red convergence moves up and down on screen


Your TV has gone crazy on you because your convergence IC's have gone bad.   These IC's operate at a very high temp, and usually only last 4-5 years.  
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months.. 
You will also need some "Heat transfer paste" - you can pick this up at radio shack.   Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go. If you need to order a resistor or two, 
http://servicemanuals.vstore.ca/index.php/cName/convergence-resistors   If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!   If this STILL doesnt make it look right, you will need to find out how to get into service mode and do a coarse convergence adjustment. This information can be found in the Service manual for your set. If you dont have one you can download it at manualuniverse.com
Hope that helps!

Jan 21, 2009 | Philips 55PW9363 55" Rear Projection...

2 Answers

How to replace the converge ic


Your convergence IC's have gone bad. There are 2 of them, you should go ahead and change both while you have it apart..

These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may last 2 years, or only last 2 minutes..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.

Once you remove the old IC's, using a solder ****** (radio shack will have this as well...) test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been very HOT or fried. replace the IC's and any bad resistors, and you should be good to go.

If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!

If this STILL doesnt make it look right, you will need to find out how to get into service mode and do a coarse convergence adjustment. This information can be found in the Service manual for your set. If you dont have one you can download it at manualuniverse.com


Hope that helps!

Jan 12, 2009 | Philips 55PP9401 55" 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

Rplaced both IC's and now need fine tuning


You probably got 1 more resistor that is out of tolerance. These resistors have to be within 5% of their rated specs if not that's your problem. Check them with a digital meter with one leg of the resistor out of circuit for true readings

Jan 31, 2008 | Toshiba 43H70 43" Rear Projection...

2 Answers

PT-53WX52


Your TV most likely has a Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
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2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together convergence repair kits for most models.

The kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, etc. Everything you will need to do the repair yourself.

Dec 02, 2007 | Panasonic PT-53WX52 53" Rear Projection...

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