Re: Philips 37PFL5322D/37 Chirping from psu
Are you powering up the SMPS with a load on the 24VDC? It may be going into overvoltage shutdown without a load. The 24VDC should not come active until you have the 12VDC running and then apply a turn on signal to activate the Stand By pin.
orgwood
Member
Last Activity: 07-28-2019, 01:51 AM
Joined: 04-23-2013
Location: Oakdale, MN 55128
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Re: Actiontec m1000 went flakey
My M1000 goes out too normally on a Saturday night...go figure. But a power cycle - pull the DC and replug, generally fixes it until the next time. I don't think that's related to the bad cap BUT the symptoms are very similar and the "fix" was the same until it finally went down for good....Leave a comment:
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Re: Actiontec m1000 went flakey
Here is a picture of the culprit bad cap! And a picture of my replacement method and cap....Leave a comment:
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Re: need suggestions replacing large capacitor
Those different voltages seem to indicate shorter hours of operation as the voltage increases so I'd try to find a higher voltage cap so that the hours of operation are near or at the lowest rating. Did I read 400V / 1000hours, 500V / 120 hours?Leave a comment:
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Re: Trying to diagnose possible PSU issue with my coffee machine
My Gevalia coffee maker with clock/timer literally blew up and caught fire. Luckily I was in the room when it happened and quickly removed it to where I could put out the small fire from the plastic. There was hardly anything left to examine but I suspect it was a bad SMPS with a bad cap.Leave a comment:
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Actiontec m1000 went flakey
My Qwest Actiontec m1000 recently started dropping off DSL even when hardwired through the LAN, not just the w1000 wireless module. So after several hour long or better discussions with qwest tech support, BTW the folks were pretty good IMHO, they said my modem was going bad. I happened to have purchased a second used m1000 at a surplus store and I was able to substitute it but the problem persisted for testing but could still not connect to the Internet. My neighbor has Century Link also and he has allowed me to connect to his wireless when needed so I was pretty sure, okay I was positive that... -
Re: Philips 37PFL5322D/37 Chirping from psu
I would like for you to help me understand the purpose of those zeners. You said they were in the snubber circuit so I would expect them to limit the voltage that appears across that primary. Is that right? If so, how does removing them and powering on the PS not cause the voltage to go too high. Thanks, DaveLeave a comment:
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Re: Artesyn NLP65 series schematic
In case anyone else runs into this problem, I've decided to add a stepup module that takes either the 5V or 12V rail and increases that voltage to my desired 24V. These modules are inexpensive and let me keep my 12V rail for future use but give me the 24V rail needed to run the AIM printer.Leave a comment:
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Re: Artesyn NLP65 series schematic
If the transformer had different taps on the windings both secondary and primary, maybe I could find the combination they used for their different models but I think that is not the case since the board layouts look identical for all models. Therefore, I conclude the transformers are different for each model. Thanks again and I looked at the schematics you posted.Leave a comment:
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Re: Artesyn NLP65 series schematic
That makes perfect sense since I now understand that the primary side is being driven so both secondaries must rise proportionately. So would it be correct to assume that there are different transformers for the different models? That would mean that I cannot do what I want to do unless I can remove/add windings from the secondary and they would have to be the correct rail and situated so I can get to them. It doesn't sound practical. If I wanted to drop a higher voltage, I might add a 3 terminal regulator if it could handle the power dissipation...Leave a comment:
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Re: Artesyn NLP65 series schematic
If there are 2 reference diodes on the secondary side, one for each rail, why would the 5V output go up when I modify the 12V rail?...Leave a comment:
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Re: Philips 37PFL5322D/37 Chirping from psu
[url]https://www.badcaps.net/forum/showthread.php?t=34579[/url]
Here's the link to the Magnavox SMPS thread since they're basically the same.Re: Philips 37PFL5322D/37 Chirping f...ally the same.Re: Philips 37PFL5322D/37 Chirping from psu
[url]https://www.badcaps.net/forum/showthread.php?t=34579[/url]
Here's the link to the Magnavox SMPS thread since they're basicallyLeave a comment:
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Re: Magnavox 37" LCD 37MF337B/37 PS: 715T2484-4 Chirping after cap/diode replace/chec
[url]https://www.badcaps.net/forum/showthread.php?t=17379&page=3[/url]
Here's the link to the Philips SMPS thread since they basically are the same.Re: Magnavox 37" LCD 37MF337B/37 PS:... are the same.Re: Magnavox 37" LCD 37MF337B/37 PS: 715T2484-4 Chirping after cap/diodeLeave a comment:
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Re: Philips 37PFL5322D/37 Chirping from psu
My son put it in his TV and everything is working fine including the remote so that means the 12VDC rail and the 24VDC rails are firing up in the right order...12VDC for standby and 24VDC for power on. Thanks so much for all your help and patience. Peace, DaveLeave a comment:
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Re: Magnavox 37" LCD 37MF337B/37 PS: 715T2484-4 Chirping after cap/diode replace/chec
I found the schematic and with budm and his help I was able to buy replacements for the FETs and the small IC and get this working. If anyone needs any help with theirs, please send me a message or post here and I think we can work you through your problem.Leave a comment:
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Re: Artesyn NLP65 series schematic
Hi Bud, I went to your photo displays and enjoyed viewing the various conditions described by the titles there...I've seen a few of those in various repair projects before. I'd advise anyone looking for examples of known types of electronic failures to take a look.
I work on just about anything that is broken and cheap to buy so my investment in my education remains low...at 68 years old, I want to stay current with my skills but also use the more current technology without being considered a rapid adapter.
So I want...Leave a comment:
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Hi Bud, I went to your photo displays and enjoyed viewing the various conditions described by the titles there...I've seen a few of those in various repair projects before. I work on just about anything that is broken and cheap to buy so my investment in my education remains low...at 68 years old, I want to stay current with my skills but also use the more current technology without being considered a rapid adapter. So I want to thank you for your patience and considerable expenditure of time and effort to mark up the schematic showing me the theory of operation of that Philllips SMPS board I... -
Re: Artesyn NLP65 series schematic
Hi budm, thanks again for your interest. I'm going to try to post some pics and a link to the sales brochure -
[url]https://cdn.badcaps-static.com/pdfs/af06bea06d1ad3af29ecf0272a9aaa7b.pdf[/url]
This one chassis can be both 5 - 24 & 5 - 12 with many other variants. I've looked at several different ones and it seems they use a main PC board and modify the personality module for the variants. The 12 V section caps are rated at 35V so they might be OK since I really don't need to go completely to the top end of my range....Last edited by orgwood; 04-22-2015, 11:35 PM.Leave a comment:
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Artesyn NLP65 series schematic
I've got several NLP65-7629s that have 2 power rails - 5VDC and 12VDC. I've looked everywhere but cannot find a schematic. I contacted their support and was told it's proprietary...I said what's so special about a SMPS that it's secret? So here's what I want to do...I have a need to modify the 12VDC rail to output around 20-24VDC. The voltages look okay on the caps and looking at generic SMPS designs, the only components setting the second rail voltage seems to be a series/parallel Resistor combo that determines the tolerance too. Those SMT resistors seem to be on a module that is vertical and... -
Re: Philips 37PFL5322D/37 Chirping from psu
As a follow up post, I received my parts FETs and ICs...installed them and everything works as it should now. My son will install this PS and give it the final test. Thanks to BUDM for sticking with me through my education and providing copious information about how everything works in the circuit diagram. I have already repaired 2 other SMPSs using my new knowledge. It's strange that this design has so many failures compared to linear but then again, most of the failures in linear are semiconductor related too. Here though, the caps seem...Leave a comment:
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