anyone familar with pn50a550s1fxa power supply? i have two bad diodes heatsink mounted.ds824 and ds825. i have no luck with the schematic or service manual. plenty of hits on reviews. long story but previous owner states dog gnawed thru power cord and after replacing cord it was dead.can post pic but there appears to be no physical damage but the diodes are shorted. they have weird numbers and i cant cross them to anything.
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Re: samsung pn50a550s1fxa power supply
Whereabouts on PSU are they? Primary/Hot or Secondary/Cold side?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. -
Re: samsung pn50a550s1fxa power supply
secondary, 3 legs to220 case bolted to heatsink. one appears marked anode to anode other cathode to cathode. i have seen this type before never seen the markings thoughComment
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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: samsung pn50a550s1fxa power supply
no, cant trace voltage back it is dead until i get the two diodes replaced. numbers are fcu10uc30 and fru10uc30.Comment
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Re: samsung pn50a550s1fxa power supply
they are switching diodes samsung part store came up with them and as always out of stock.Comment
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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: samsung pn50a550s1fxa power supply
no they are on the output of an xformerComment
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Re: samsung pn50a550s1fxa power supply
And they go into some caps... which have a voltage rating of XYZ... (maybe through an inductor... and then some caps which have a voltage rating of XYZ...) and then into a connector... which has a labelled voltage of XYZ...
Replace "XYZ" with appropriate values.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: samsung pn50a550s1fxa power supply
the caps have a rating of 250v one is common anode and one is common cathode. center lec being common, two anode and two cathode.the connector is labeled=vs,vs,nc,rtn,rtn, vgComment
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Re: samsung pn50a550s1fxa power supply
i just got it running, its a temp job to see if anything else was fried. good news is she is 100%.took two 5amp 1000v switching diodes and made one the other came out of an old computer supply. gonna try and order diodes tomorrow morning. thanks, guess i was looking for an easy way out.Comment
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Re: samsung pn50a550s1fxa power supply
Oh, plasma TV. Okay, should have realised from "pn".
Try 300V fast recovery 10A like this.
http://search.digikey.com/us/en/prod...WGI-ND/1147822Please 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: samsung pn50a550s1fxa power supply
time to update this a bit, finally found a pair of diodes that work, they need to be insulated from the heatsink though. they are available at mouser electronics, so far with these no problems.mur1620ctrg is com dual anode andmur1620ctg common dual cathode. these are 16 amp 200v original was 10 at 200v.so far they are doing the job. I used the silicone type pads instead of mica for insulators.Comment
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Re: samsung pn50a550s1fxa power supply
Do you think mur1620ctg will work as the FCU10UC30 replacement if the rectified voltage is 202v?
I'm currently looking at these SDURF2030CT https://www.digikey.com/scripts/DkSe...17855932124438
A bit higher recovery time but overall good matchLast edited by zape; 09-23-2017, 04:49 PM.Comment
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Re: samsung pn50a550s1fxa power supply
they should, mine is still good with the mur1620's.wish I could have found something with the insulated case. I used silicone wafers and nylon screws to isolate the case from the heat sink.Comment
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Re: samsung pn50a550s1fxa power supply
so will the SDURF2030CT & SDURF2030CTR work as a sub for these common dual diodes ?Comment
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Re: samsung pn50a550s1fxa power supply
SDURF2040CT worked fine for me.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
This Samsung combined power supply and inverter was replaced a while ago from a Samsung 37inch LE37B530P7W TV. However I would like to repair this one.
I have replaced the Mosfets Q1820 and Q1821 ( FDPF7N50U) which were both blown and the fuse FM802S. The schematic for this power supply that is attached doesn't relate to this power supply as the driving transistors and diodes are D1830, D1831, D1832, D1833, Q1811 & Q1810 are nowhere on the schematic!
Does anyone know what the components for D1830, D1831, D1832, D1833, Q1811 & Q1810 should be? I ask as I did change the Mosfets... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
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