Question about Samsung 50 in. Plasma TV

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Samsung SPL-4225 with Chassis AA98-00188A it comes on then shuts off in 3 seconds. I replaced C405, C406, C407, C408 since they were puffed up, but the problem remains. What other part needs be replaced?

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Hi, if you have the service manual, check the power components related with these capacitors (power transistors, diodes, etc), commonly a capacitor is puffed up when receives more voltage than which can handle.

Posted on Oct 20, 2013

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Posted on Jan 02, 2017

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Tv chimes like it is powering on screen comes on for a second then shuts off


This is becoming a common issue. Electrolytic filter capacitors in the power supply are typically underrated in voltage from the start. Your symptoms are the primary stages of the caps failing. Usually, the capacitors can be replaced instead of the whole power supply board itself at a significant savings. Upon inspection, they will appear to be swollen or puffed up on top. Replace them with 25 volt caps of the same value and you'll be good to go.

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Hi, my tv hc-p4241w was ok but one day, the picture in the screen become wide and then I saw smoke from the rear panel. I switched off the TV, and I found that the C407 have exploded, there's a Diode...


Look to see if any coolant fluid has leaked from any of the CRT's. This is a common cause of multiple component failures in these models. Look real close at the CRT mounting bracket, the wires coming from the CRT's and look at the particle board below to see if you can see any staining or puffed up wood particles. My experience with the Samsung bds is when you have a multiple compoment failure due to fluid leakage it is best to replace the boards instead of component level repair because other components will fail at a later time. Coolant fluid is real hard to spot since it is ultra clear. Hope this helps.

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Screen goes black randomly during use and tv shuts off


check your capacitors cp150 114 120 if any of them is puffed up on top it is bad replace all 3 cap. 2200uf 1`6v and two 220uf 35v. also resolder FBT pinns.

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Unit shuts down (D52GW12)


There is little plastic clips that hold board in push them back and slowly lift chassis up and out. and since you said cp150 is puffed up replace all 3 capacitors on cp150 2200uf 16 use a 25volt,other 2 use same 220uf 35v.cp114 cp120.

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3 Answers

White lines at top of TV


I had the same problem with horizontal white lines about 4 inches at the top of my 5 year old 27AF43 Toshiba. Solution, I found by google was to replace C407 but no directions. Here is how I did it.

First is to locate a new polarized 100uf 35V capacitor. I was able to buy 5 of these at a local electronic parts store for $2.50.

Next is to open up the TV. Turn off the TV and unplug all wires, place TV screen side down, remove the seven large screws, three on each side and seventh a couple of inches up from the bottom and about nine inches in from side. Then remove the two small screws in the area where the cables plug in. Gently lift off the back cover.

Put a large magazine or newspaper over the bottom part of the picture tube to protect if from scratches.

Next is to pull out the cicuit board at the bottom of the TV, it's the only one. Clip the cable ties holding some of the wires to give more freedom of movement and then gently pull up on the board. It doesn't need any fidling with clips or tabs or such, just pull straight up. You don't need to disconnect any wires.

Then locate capacitor C407. It is black and marked on the cicuit board and is 3 1/2 inches in from the edge and right by the corner of a heat sink. It will have 100uf 35V written on it. Note which side is the negative (this is important). It will be the same side as the other capacitors close to C407.

Next is to replace C407. Take some measurements from the edges of the cicuit board so you can locate C407 (from the bottom) and then flip the board over and locate C407's leads. Draw a circle around its leads with a felt pen. Us a fine tipped soldering iron and a solder ****** to remove the solder. Be careful with this. Might take a couple of goes but eventually you will beable to wiggle C407 and it will come out.

Put the new capacitor in and make sure the negative is on the correct side (this is important). Solder the two leads and be very careful the solder doesn't bridge between the two leads. Let it cool for a few minutes then use a pair of side cutters to cut off the excess leads.

Slide the circuit board back and push gently down until it snaps into position.

Remove the protective magazine or newspaper.

Use a couple of new cable ties to replace the ones you cut.

Replace the back cover being careful that the power cord is positoned correctly into its little notch. Replace the two small screws and the seven large ones.

Reattach the cables. Cross your fingers and turn on the TV. With luck your white lines will be gone.

Good luck

Brian
VE6IMB

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1 Answer

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Look on Deflection board If cp150 capacitor is puffed up on top it is bad there is 3 caps to replace cp150(,2200uf 16v ) cp114,cp120.(220uf 35v). The SSB board can also shut set down.

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