Trying to fix my Aunts TV. Found that this t-con board was the issue. For some reason, resistor "R57" was fried. I went to a used TV parts store who happened to have a used one available. However, when I got to the shop, i noticed that the resistor on that one looked a little burnt, so I asked to tech to check it for me. As soon as checked it, it blew off. Now, I need to find out what the value of that resistor is (if possible) so I can replace it with a little bit more sturdy one. I hear this problem with the resistor is likely a short somewhere on the mother board or power board, probably a design flaw. The value of the resistor would be greatly appreciated.
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Re: Resistor "R57" need to know the value of it
1) you can use the code color resistor, and get it from internet in according with the color or resistor you will have the value exactly. go http://sourceforge.net/projects/resistorcolorco/ 2) the another alternative is if you have the diagram from the motherboard and look for the value resistor, and replace it. God bless you
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I have the same fault. I'm in Malaysia. The R57 is the blow out resistor for the "compter section of the board. Mine appears to have been caused by the Transient Voltage suppressor clamping. TRSB1 and possibly the diode (ultra fast rectifier) D5.. Did you find the resistor value?
I can't help you (directly) with the resistor value, but be aware that if it exploded, there is probably another bad component (such as a capacitor, transistor, and/or an SCR). Replacing only the resistor may result in the same problem, or may not even work at all due to another bad component. If you do find out the value, try putting in a resistor of the same value, but with a higher wattage rating. I once had a washing machine in which the model had a known problem with circuit boards blowing. I solved it by replacing a bad transistor and installing a higher wattage resistor that had blown up like yours. It never failed again. The way I found the value of the blown resistor is, I looked up a replacement board online, then magnified the photo, and looked at the color code on that same resistor in the photo. How I found the bad transistor is too complicated to explain in few words, but you can google the procedure. (You'll need a multi-meter at the very least; preferably _with_ a built in transistor checker. However, a _totally_ blown transistor can be found with only the resistance settings on a regular multi-meter).
If the resistor is found burned; there should be a reason. IC short or some sort of that. Without rectifying the fault; if you replace it with an other resistor; it too will burn out, sometimes cause more fault to set. Check for the reason first. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
If you have the expertise to replace individual components, it's easy to repair, and inexpensive. Replace DZ1 and DZ4, found under the 2 grey resistors. DZ1 is a 15v, 1watt zener diode, zd4 is a 24v 5 watt zener diode. The copper print may be damaged by the heat, so it will need to be repaired as well. Also, the discolored resistor (R57) may also need to be replaced. It is a 1K ohm 2 watt resistor, replace it with a 1K ohm 5 watt resistor. If you are unable to replace the components and do the repair, the motor controller is easy to find online and replace yourself. One of the most common reasons why these boards fail prematurely, is because people do not turn the machine off when done using. Removing the safety key does not turn the machine off, only the console!! Turn it off by the on/off switch or unplug it after use.. I have replaced numerous controllers that failed when the machine was not even being used at all..
Go to an electronics parts shop and take the damage resistor with you.
The bands are a colour code (the first two bands indicate the first two numbers, the 3rd one is for the number of zeros and the fourth one is the accuracy of the value e.g. 5%, 10%) for the value of the resistor.
The physical size of the component gives an indication of the current that it can carry.
It's not a 1k Resistor but a 10k...it's the resistor R3 on the Circuit Board Part Number RPB-4434ZA (P/N: 23122468). If you don' replace the resistor you will keep burning your lamp. If you decide to replace the resistor by yourself...you should take the time to look at all the on the back of the board. This Board is made by the company Rubicon Corporation for Toshiba and it's a issue on the Toshiba DLP TV (62-52HMX84). If you don't wanna do the job yourself..bring your TV to a repair and give him the part number of the board and ask him to replace the board for you. If the price is higher than $350.00 go somewhere else...He try to fu....^&*%*%&%.