i just openen up a philips 50pf7220a/37 i noticed right away that 2 capicators were buldging. should i just replace those to on the power supply board or should i replace all ? the board i2 lj44-00108c (samsung board) . the owner that i got the tv from said sometimes it would turn on, and sometimes it wouldnt. when it did turn on after awhile it would just power off on its on,,(prob from the bad caps)
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Re: philips 50pf7220a/37 (bad caps)
Usual just the 2 will get it working. Look around the board, if you have any others with the same values, then they would be from the same lot. I would change them also. -
Re: philips 50pf7220a/37 (bad caps)
I would suggest to replace them all at least in the secondary side, bad cap can look normal, and when they fail to filter out the AC, the AC ripple can damage the circuits. Make sure to use good quaility LOW ESR type for switching power supply, I use PANASONIC FM/FC/FR series from DIGIKEY.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: philips 50pf7220a/37 (bad caps)
I would replace them all depending on brand, sometimes Samsung using a mixture of caps. List all of the brands and series of the caps on the power boardComment
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Re: philips 50pf7220a/37 (bad caps)
these are the 2 bad caps on the power supply. i hope the pictures come out ok . hopefully this is all that is wrong and two new caps will get it runing again !
either way i will probally will end up replacing all the caps on the board.
Attached FilesLast edited by tocold4u2; 01-09-2013, 10:20 PM.Comment
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Re: philips 50pf7220a/37 (bad caps)
Heat up the suspect caps with a hairdryer:
https://www.youtube.com/watch?v=Ggn_ggaPvc4&t=2m35s
Often, it will give them some short extra life to verify if there are additional faults. Don't run it too long in that condition, just a few minutes to check all is well.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: philips 50pf7220a/37 (bad caps)
i had ordered 2 caps,,why i don't know because i took 2 from the lg after i put a repair kit on the power board!! i got a great looking tv and tomorrow i will finish puting all those screws back in it ! atleast i got lucky and only had to replace the 2 caps without any other prolbems yet, i will put it together and let it run for a few hrs just to be safe ! thanks for the help everyone!Comment
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Re: philips 50pf7220a/37 (bad caps)
well i decided to replace the two used caps that i put in the philips , with two new ones . im not totally sure but i think when it had the used caps that there was no green power light at bottom left ?? idk maybe i just never noticed, but there is one now i do know that !!Comment
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Re: philips 50pf7220a/37 (bad caps)
Those are the standby power caps.
When they fail standby power drops out.
Standby power lights the LED.
Without standby power the LED does not light.
If the LED does not emit light you will not see it.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: philips 50pf7220a/37 (bad caps)
ok thanks for that,,,,so the two used caps that i put in to replace the two that were buldged werent that good either! guess i`m glad that i put the new caps in it!Comment
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Re: philips 50pf7220a/37 (bad caps)
i did notice some light red sparkles in certian pictures on screen ,,,,but the va and vs is right on the money . should i just live with it ?Comment
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Re: philips 50pf7220a/37 (bad caps)
No, tweak the Yrr and Yfr controls and drop Vscan slightly.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: philips 50pf7220a/37 (bad caps)
ok i will give that a try and c if that helpsComment
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Re: philips 50pf7220a/37 (bad caps)
well by the v scan there is a adjust (yr8005) by the v set (yr8002) 12v(vr8009) vs -(vr0007) ve-(vr8006) just adjust the one by the v scan?Comment
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Re: philips 50pf7220a/37 (bad caps)
tom is that on the p s or on the y main ??
thanks 4 the helpComment
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Re: philips 50pf7220a/37 (bad caps)
Yrr/Yfr are on Y-Main.
Vscan is on Y-Main or PSU.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: philips 50pf7220a/37 (bad caps)
that must be the yr5000 pot and the yr5001 that is the only 2 on that boardComment
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Re: philips 50pf7220a/37 (bad caps)
Picture of Y-main?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: philips 50pf7220a/37 (bad caps)
this may helpAttached FilesComment
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Re: philips 50pf7220a/37 (bad caps)
Are the two white pots, next to the coil packs, what you are talking about? Those do look like Yrr/Yfr.
BTW, what is chassis number of this set? Will be on model sticker, in a box labelled "S".Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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Hello!
I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.
The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.
I have studied the board and... -
I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,... -
Good evening
I recently aquired a rev 1.1 Gigabyte 60XT, and was suprised of the amount of leaking caps for a motherboard of the P3 era. Especially the way the 330µf caps seems like the housing discolored even.
Now, there are some 3300µF 6.3V KZG series around the CPU. Would it be OK to replace them with something like EEUFR1A332 ? (Panasonic FR 3300µF 10V). Or was this board designed around very low ESR caps?
But I was also suprised about the bigger boys, which are 330µF 25V.
Could it be they used 25V caps because they were cheaper / available at that time?...
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