This PHILIPS LCD TV has a complaint no power. The owner of this tv is the son of my first cousin. He said that while their watching tv, they heard a loud bang coming from inside and the tv became dead. He open it and put another spare fuse and power it again and fuse blown again.It is a sign that there is some shorted component in the switch mode power supply. The model no of the tv is 32PFL3409/98. It is a 32 inch lcd tv.
This lcd tv was bought in abu dabhi in middle east. Upon opening i scan the components for possible clue of burnt and i did not noticed any. So i proceed to usual troubleshooting to test the bridge type diode and it is okay. Second i test is power fet which has a part number K3561 and it is okay also. But i test it also out of circuit to be sure and found it in good condition. So i try to think what cause the fuse to blow if the bridge diode and fet is ok upon scanning i saw high voltage capacitor 1kv 221k a blue color that has dark spot on its body and i noticed it was blown. When you traced it from the positive of the bridge diode going to positive side of main filter capacitor, from that the other pin of switch mode chopper going to the drain of fet but before the drain there is this high voltage capacitor which protect the fet from blowing. I replaced it with 2kv 221J and the Lcd tv came back to life. But before i powered it i test all possible semiconductor that is prone to short like transistor, diode. I test also the optoisolator/ optocoupler. It has power ic FSD510 made by fairchild. It has two power fet K3561 which is not affected by short circuit which protect by two capacitors.
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the second high voltage capacitor which has black spot is the culprit why the fuse blow.
More clearer picture of phillips lcd tv from KKH. Thank you.
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23 Comments:
HI ZED
thanks for good article . but my question . is this high voltage cap is in power supply section?
beh
yes beh it is in power supply area. i dont know what are the right term by other tecnician in this 1kv capacitor.
ok thanks if you post the picture of
blown cap could be very useful
Hi Zed, good repair.
May I put your article in my magazine?
If you can put sharper pictures about this Lcd it will be Ok.
Thank you.
Roberto Salerno from Italy
hi beh.the last picture which shown the blue color capacitor. i forgot to take a picture when i took it out on the circuit.
hi mr salerno long time no news from you. im glad to heard from. yes you can post. but unfortunately i have no brighter picture. my digital camera i think has a problem.
HI ZED
thanks for reply .1KV cap is really high voltage cap but is used in powersupply area . that is why i asked you this question. when i find the calprite component i make a good foto of this also i make record what is the ESR meter or OHM meter says about this calprit after hour search
beh
Thank you Zed.
Ok for pictures, no problem.
Bye from Italy
you cannot measure the esr beh because the capacitor body has blown.
Hi Zed,
I am having a same issue with my LCD(same model/brand).However, had fixed it from the dubai but once again fuse has blows off. I really need your technical advise if it is worthfull to repair this lcd one more time or better to switch to some other brand..
Thanks,
Ammad
My TV just blew up today. Thanks to your post I'm able to find the SAME problem. I have yet to grab the parts and have it fix.
http://www.freeimagehosting.net/f561f
Paid SGD $2.00 for the 3.15A 250VAC fuse and 1KV 221 capacitor.
Refer to image url for clear picture of the replaced components.
http://www.freeimagehosting.net/fc5d1
http://www.freeimagehosting.net/a6808
Hi my tv also blew like that i saw the blue conductor i will change it today and give a good comment
nuwais64@gmail.com
my Philips 32PFL3409/98 have panel problem and in my city philips did not launch this model soo some one help me escape from this problem
hi sohaib. I dont encounter that problem in this time. maybe you can visit jestineyong.com and you can get a lot of info and you can buy a book related to lcd tv repair their.
hi ammad;
sorry for late reply. if you have replaced already the the 1kv capacitor .check for other trouble or culprit like FET AND POWER IC DIODE IF TIS SHORTED IT WILL BLOW THE FUSE
Hi Zed,.my tv too have the same problem w/your's,..my question is,can I replace the blue capacitor w/ a number 417k/1kv?,..cu'z here in our place had a difficult to find this kind of caps,..
Hi Zed,
My Tv have the same problem w/your's,..my question is,can I replace the blue cap w/ a number of 417k/1kv?cuz'here in our place is very difficult to find this kind of caps,..I have here lots of blue caps but couldn't find a 221/1k,.hope for your best advice,..
Hi Raffy,
Sorry for late reply. I am not advising to replace 221 1kv. You can order it thru internet. What country are you from. You can try but you will reap what will be the consequence. but not advising it might cause harm more to your lcd tv. you can 221 even 2kv but not the value should be change. look for junk electronics board it might have one.
I need to now nambar of ic 1 - ic 2 - ic 3 in power supply ( 40-IPL32L-PWG1XG ) tv philips 32 pfl 3409/98
& thanks alot for you .
my email / mmmd572000@yahoo.com
hye i just to ask why my tv Philip model 32PFL3409/98 have power supply but when i turn on the power on tv or remote control it won't turn on so you can email me on Domicrocher@live.com i need the answer
Get original philips part from "PrecisionLogic Inc.! ISO 9001:2008 Certified supplier; Stocking Electronic Distributor;
In Business Since 1993; Supplying the top OEM's and CM's in the electronic's industry."
http://precisionlogicinc.net/parts/?cat=psd
Hi there can you guys help me i have this power supply but where the one blown for you mine blown also and in the back of it more part are burnt but i can get it reference can anyone help me in this??
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