Question about Samsung LW20M21C 20 in. LCD Television

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Samsung LW20M21cpd I am looking for the number of the power supply regulator I/C. It is marked as IC101 on the circuit board. it is 6 legged devise but has blown a hole in the casing so the number has disappeared

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5 Suggested Answers

SOURCE: spn4235 42" Samsung Plasma 6 years old

you can get the power supply and/or the service manual (with schematics included) here.
http://www.samsungparts.com/search/search.asp

Posted on Jun 22, 2008

  • 304 Answers

SOURCE: Samsung TV Power Supply Board

I doubt that moisture damaged the SMPS bd.
There are many circuit boards in your set and it will take a trained samsung tech to find the problem.

Posted on Jul 17, 2009

  • 2307 Answers

SOURCE: Samsung Power Supply Board

The power supply part number is BN44-00159A. You can also download the info from this link. It's the service manual.

Posted on Jul 17, 2009

Cool_dud 09
  • 206 Answers

SOURCE: power supply board

Hai,
Please check on here....you will find it out!

Posted on Aug 23, 2009

budmrtn
  • 11361 Answers

SOURCE: Samsung power supply & IP board BN44-00264B &

Please see here:

http://www.shopjimmy.com/samsung-bn44-00264b-power-supply.htm

You have verify the LCD panel.

Basic LCD monitor and TV troubleshooting guide:

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://www.fixya.com/support/r7406380-tv_training_manuals

Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Posted on Jun 01, 2011

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Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
BN44-00341B - will be the number of power supply board used with this TV. Check it. If so, visit the site linked here to see its circuit diagram. Try to follow it, and do a repair work, or replace it.
Good luck

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Fault with the main power supply regulator section. Either it will be on a separate board, or on the part of its main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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Fault in the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
There are circuit diagrams [schematics] to some model power supply boards to Samsung. BN***** Series SMPS. Check it, and try to repair if you're sound in electronics, and has previous work experience in repairing the SMPS power supplies.

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Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and precious time.

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Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

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1 Answer

Blinks 7 times


Hello
It is due to some trouble in its voltage regulator system.

High voltage shutdown. The high voltage has exceeded 33k

and the unit goes immediately into safety shutdown. Check power supply
regulation and horizontal circuits.
Open the TV, and locate the power regulator section. Usually most Sony sets uses STR regulated type power supply in this stage. If any component related to this STR got faulty, this type of fault occurs. Mostly it may be due to a loose soldering and so on. The STR will heat up, and repeated heating and colling can make tis leg soldering to get loose contacted.
You just updie down the regulated section, and look for any loose sodering or bad soldering in that section. Loose soderings are very difficult to locate, as they may be microscopic in size. So I advice you to resolder most of the soldering points on that section, by applying a little more solder. Be sure not to make any soldering bridge shorts, when resoldering. Chek it out. In most cases this will solve the problem.
If not, replace thetow or three small electrolytic capacitors there, and recheck. When replacing electrolytic capacitors, make sure of its polarity, as they have both positive and negative legs, marked both on the body of the capacitor and on the printed circuit board. Make sure not to reverse the side, otherwise it will burst out when you switch on the Tv.
Do these and see the effect. If you need furthermore assistance, feel free to get me through fixya. OK.

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2 Answers

I need to know the ic of the power supply (IC101) since it is blowed up of an LCD samsung LM 20m21c


Check the picture below to find IC101 part number. It appears to be a 3.3 voltage regulator.


e037b2b.jpg

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Your TV is experiencing a convergence issue as indicated by the 3 blinks. The only way to fix this is replacing the convergence ICs. It is not a hard task to replace these ICs. You just need to know how to solder and work on printed circuit boards.

The convergence ICs are mounted on a large heat sink and are marked with codes starting with the letters STK and there are two of them. You need to replace both.

Look for the heat sink with two ICs mounted on it and check the markings.

Once found, cut the IC legs with a small side cutter and unscrew it from the heat sink. Remove the legs left soldered on the board.

Take note of the IC markings for ordering the right part and how it was installed. Don't forget to buy along with the IC a thermal compound.

Check the pico fuses on the same board. Most likely you will find a blown one. These fuses look very much like a resistor, not like the usual transparent fuse, and usually yellow.

Once you have the replacement ICs, put it on the board in the same way as it was installed before. Make sure the screw holes are aligned before soldering the legs into the board.

Put a reasonable amount of thermal grease/compound between the ICs and the heat sink and fix them with the screws.

Double check the board for any splash of solders that might cause a short circuit and damage the board.


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1 Answer

Fisher paykel washing machine top loader model aw0850 fresh5


On the morning of Monday 23/6/08, I have decided to measure the effected components on the control (power) board.
The control or power board is the one that supply the DC power to the DC motor which runs the tumbler of the machine.

I could see black marks around 3 leg component which is clamped against the cooling pipe on the board.
I decided to enter the component number the one printed on it in the internet Go ogle site.
The description of the 3 leg component was TOP224Y and is a switch and inspecting it reveals its casing was blowen and one of the leg was separated.
I decided to buy a new TOP224Y and there was only TOP224YN available no more TOP224Y.
The price is $10 something.
With a solder ****** I was able to dismount TOP224Y from the control board,
and when I will receive the new TOP224YN I will replace it.
In the same time I noticed a big diode next to TOP224Y was also overheated and cracked and a small glass diode was also cracked and need replacement. The transformer next to the TOP224Y is called fly transformer I had measured it with an ohm meter, it reads very low nearly zero ohm.
I will receive the new component TOP224YN tomorrow 24/6.

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