Question about Mitsubishi VS-5043 50" Rear Projection Television

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Upon inspection of the mentioned areas I discovered a burned spot on the board at IC9A1 near a 2 watt 2.7 ohm resistor R508 and QA543 which all have overheated solder connections. IC9A1 and QA543 both have bad connections to the PCB cicuitry. There appears to be another resistor mounted too close to the fuse in that area and looks to have touched the fuse terminal. There is a carbon deposit on the lead, such as an arc. Your input has been very helpful in narrowing down the search and I thouht you might like the findings. One note: I could not locate R510. The circuit may have been modified slightly

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Not uncommon in a mits and more likely due to some caps that have exceeded their ESR. That still doesn't make this unit unrepairable, mits were built to last. Find a good reliable shop and take it in... You can use the NESDA web site to locate one unless you have that worked out.
Good Luck!
Bill

Posted on Sep 10, 2008

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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 Projection Televisions

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Can you tell me where the 2 Convergence IC's and the 12, 6.8 ohm 1 watt resistors are located in the Magnovox 51MP329H TV


When you remove the rear cover you will see the large green board on the left side. Note the two large aluminum heatsinks with the fins? The 2 Convergence Ics STK392-120 are attached to that heat sink the 12 6.8 ohm resistors are at board location 3149-3160 they are all the 6.8 ohm 1watt metal film resistor located near the Heat sink which has the two ICs.

Aug 25, 2011 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Smelled smoke and hot wires, tv went off and never came back on again. opened back and found only one small part looked burned out, ( broken and a little brown on the board.) Part number R14705.


Thats a 27K 1/2 watt Carbon Composition resistor 5% tolerance. You got deflection issues so a replacement resistor will most likely fail unless you discover whaich componenet on the deflection board caused the resistor to burn. The deflection boards have been discontinued for your model which has the ATC321 chassis. But you can get a remanufactured ATC321 deflection board from www.tvrepairworld.com

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1 Answer

Lost color


You have several bad grounds on the convergence board. Boy! I mean several and to numerous to mention. If you know which is the convergence board, pull this out of the TV. This will be difficult and requires your best patience. The convergence IC is located on a large heat sink. The IC will be an STK 393-110. Start by re soldering the pins on this IC. Check all resistors that are 3.9 ohms at 2 watts for values with a DMM. I do not believe these will be need replacing, check to be sure any way. You may have to re solder these as well. You will note you will need to re solder the jumper jacks (these connect to boards on either side of the one you are working on. Locations of these jumper jacks are PM, VU, and PF. Now if you can, inspect the rest of the board, and look very close for solder breaks on diodes, transistors, capacitors, resistors and transformers. You must really look close to find these. Don't expect to do this in one day. Spend about thirty minutes a day for week, for inspection and corrections. Thanks for (yawning!) asking me and show all hands of support! G'dnite.

May 07, 2011 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

I have 3d affect. unable to read text . colors not inline.


You have a convergence problem. You must replace the convergence ICs. These are located in the power board (this has the Flyback transformer). It has been sometime since I have repaired one of these. The convergence ICs are of the STK-392-110. You must replace these. These ICs are located on two large heat sinks. You will need lots of patience to remove the board. Then you will need lots of patience to remove these convergence ICs. Inspect the board close for burned resistors near the ICs. (these are under 10 ohms at 2 watts). Check these with an ohm meter and replace as necessary. The best information for a first timer who really wants to repair this TV, see the website, www.TVRepairKits.com. This is an excellent source with photos and parts lists to correct your problem. Another note....some of these TVs are made by Samsung.The model number you find on the website may tell you this. So, now you know you will be on your way for repair! Thanks for asking and show all hands of support!

Apr 23, 2011 | Akai PT5492S 54" Rear Projection...

1 Answer

All three colors red, blue and yellow come intermitently. Most of the time blue and yellow is only projected


You are experiencing a convergence problem. You have a IC or ICs that are either bad or have been separated from the board. The separation would be the solder around the pins have developed rings around them,thus no ground connection. These Ics are attached to large heat sinks. They would have a number on them such as STK-392-110 or STK-393-110. Check the two fuses as this is an indication of how severe the board damage is. If the fuses on this board are burned, you may have to replace the board altogether. If not read on. Inspect the low ohm 2 watt resistors. (less than 10 ohms) Your best fix, if you feel you can do this, would be to contact the website, www.TvRepairKits.com. Have your model number near by. Other than that you, should seek a TV Tech. Armed with this info, may provide you with a reasonable cost of repairs.

Feb 14, 2011 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Is there a way that you can tell if your resistors are blown


Hi


Thanks for using FixYa. By looking at the resistors you can see if they are burned or brown color. Only the resistors with small value blow(getting open) like 1 ohm 1/4 watt or 1 ohm 1/2 watt or 10 ohm 1/2 , 1/4 watt some times the bigger one like 100 ohms, the bigger than 100 ohm just changing the value and make problem.


Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Jan 22, 2010 | Projection Televisions

1 Answer

Sony KP-65WV600 Convergence AD Board


It should be a 4.7 OHM if its under the heatsink near the convergence chips.

You can do the repair yourself using the following instructions.



http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 22, 2009 | Sony KP-65WV600 65" Rear Projection...

1 Answer

Samsung pcl5414r power resistors and pico fuses??


Hi again and welcome back to FixYa,

Appreciate the direct "Ask Me'.

Based on your original post, only the STK ICs were replaced. Presumably 392-040, the surrounding resistors and pico fuses could very well have been affected as well. Depending on the board revision (pls confirm location numbering on the actual board), the resistors could be:
RZ104 -RZ106 - 270 Ohm 1/2watt
RZ133-RZ135 - 27K Ohm 1/16 watt
RZ136 & RZ138 - 3.3K Ohm 1/8 watt
RZ146 and RZ147 - 3.9 Ohm 2 watt
RZ148 and RZ149 - 150 Ohm 2 watt
while the pico fuses would look like the image below.
90b151e.jpg
Good luck and Thank you for using FixYa.

Dec 26, 2008 | Samsung PCL5415RB 54" Rear Projection...

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