Re: Intermittent Samsung H4000 TV A/V problem. Failing component, or "reset" fixable?
Thanks for the hints. Found the update to firmware for the exact model and will try that when I can get there. Will be sure to bring a spray to clean as well.
ja1870
Member
Last Activity: 03-16-2023, 12:52 AM
Joined: 07-02-2014
Location: Edison, NJ
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Intermittent Samsung H4000 TV A/V problem. Failing component, or "reset" fixable?
As probably no symptom is unknown to those around here, would appreciate any comments.
Trying to troubleshoot an intermittent condition for a non-technical senior - remotely.
When I can get over there, will try a factory reset, but suppose it could be a symptom of a failing cap or other component - and prefer to be forewarned either way, if possible.
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Detail:
Older 28" (non-Smart) flat screen Samsung UN28H4000AFXZA works perfectly, except when occasionally displays one of two - probably related - symptoms.
1) Channel displays... -
Re: Any way to identify a failed (simple/cheap) thermistor?
Certain it is the Semitec as you suggested. Already ordered.
No writing, so probably jpeg compression artifacts. And infinite resistance on the thermistor.
Don't laugh too hard because I'm no pro...but went to the basement to extract a dusty old 150-in-One RadioShack Electronics Project Kit. Used a DMM to note the resistances at the potentiometer number-marks; wired it in, and found the fan went on at 5-6 kΩ.
According to the spec sheet for the Semitec 103AT, that corresponds...Leave a comment:
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Re: Any way to identify a failed (simple/cheap) thermistor?
Much appreciate the response. Very interesting thought re: the potentiometer.
(Was actually wondering whether the white tip was OEM marking or perhaps some sort of failure indication.)Leave a comment:
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Any way to identify a failed (simple/cheap) thermistor?
Hi all,
Just presuming it is a thermistor, and NTC, as when contacts are jumped (so zero resistance), the currently *not-moving* 12V case fan revs up to full speed.
By eye (FWIW) about 1.75mm x 2.5mm, and no writing noticed.
This is from an external 3.5" disk drive enclosure with a cooling fan, and the "thermal probe" - as it was called in the original installation manual - is held against the top-side of the HDD near the spindle.
Hoping to simply replace it with a close-enough component.
Thanks.
Edit: after some further random visual-type web-searches,...Last edited by ja1870; 10-31-2022, 09:58 PM. -
Re: Curious if reducing a couple of caps could down-rate a power board to US-voltage
Most interesting. Appreciate the additional comments. (And thanks, Mod. Sorry, didn't realize the blocks on the photos.)
Unsuccessfully poked around for a schematic, but did find more pics of the "US" board.
this one, clearly depicted 100uF 250V Samwha caps in this image from Amazon ASIN B01G7KC1A8:
[url]https://images-na.ssl-images-amazon.com/images/I/91cHbroMU6L._SL1500_.jpg[/url]
rather than the 420V/100uF on the "universal"...Last edited by ja1870; 05-07-2017, 09:05 PM.Leave a comment:
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Re: Curious if reducing a couple of caps could down-rate a power board to US-voltage
Thanks for the information. I learn a lot at badcaps.net.
By the way, looks like the wrong picture got uploaded above. I can't edit the first post, so for completeness here is the correct Bigger-Higher-Voltage Cap (Universal?) "A" board picture:
Image source: [url]http://www.shopjimmy.com/samsung-bn44-00769a-power-supply-led-board.htm[/url]Re: Curious if reducing a couple of .../> Thanks for...Leave a comment:
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Curious if reducing a couple of caps could down-rate a power board to US-voltage only
This total noob is re-posting here (from General Capacitor Questions & Issues), as it was noted that it's a kind of power board design question (although probably trivially obvious to those here).
Could a manufacturer actually "down-rate" a power board to US-voltage input only (and reduce cost?), simply by reducing the voltage rating of a couple of caps?
Detail: I was checking out power boards for a 40in Samsung LED TV (UN40H5003AFXZA ver IF02) model which sold in the US a couple of years back. Looks like the current preferred replacement part number... -
Curious about just the caps making a difference between LED TV power board models
This noob is curious about LED TV power board caps sizing and input AC voltages.
I was checking out power boards for a 40in Samsung LED TV (UN40H5003AFXZA ver IF02) model which sold in the US a couple of years back. Looks like the current preferred replacement part number is BN44-00769C.
In photos of the part, saw printed on the board "110V Only" - and wondered if they stopped making universal power supplies, or did Samsung print it to discourage people from moving electronics around.
Then I noticed pics of a different listed-as-compatible... -
Re: Help noob choose ELNA, RJG, 10V, 100uF replacement cap?
Very much appreciate pointing me in the right direction.
It's from a decade old piece of home theater equipment - and surprisingly (to me) not on the power sub-board. Realize at that age, a complete re-capping might be recommended, but this will be my first [I]real[/I] try at it. (And am sure it's no coincidence the brands you mentioned above were up there on the higher-end cap manufacturer "list".)
Thanks again.Re: Help noob choose ELNA, RJG, 10V, 100uF replacement cap?
Last edited by ja1870; 02-17-2016, 01:34 PM.Leave a comment:
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Help noob choose ELNA, RJG, 10V, 100µF replacement cap?
I know that many of you can probably choose a perfectly good replacement out of a box of loose caps by just by feel …
But can you hold a noob's hand a bit?
On the (approx) 11mm height x 5.3mm diameter cap is:
ELNA, RJG, 10V, 100uF, (M), CE105˚C, 0602, (S)
ELNA website no longer shows an RJG series. Overwhelmed by choices and options at places like DigiKey. Would any of the many seemingly close ones work?
Even if scrounging locally, from what I'm getting around here: = or a bit higher V is OK, try for closer but no lower uF, and...Last edited by ja1870; 02-17-2016, 04:34 AM. -
Re: How can you find out about local re-cappers/service? (ex. Brooklyn NY USA)
Thanks for the comments.
Yes, although he found the two very closest shops didn't do board-level work, he's still checking into more locals.
And embarrassingly, must have somehow missed the possibility of the proprietor of this forum... I'll send my cousin the contact link.Leave a comment:
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How can you find out about local re-cappers/service? (ex. Brooklyn NY USA)
Hello from a newbie,
In general, are there useful ways to find out about local re-cappers/service?
Or maybe it's just not something done, except under very unusual and specific circumstances?
It's never been a heading in the yellow-pages. Never yet came across a neighborhood "computer" store (or a rare "TV/Appliance" store) which fixes rather than swaps boards, if the item is not junked. Not going to find any info at the local Radio Shack (which is all about cell phones). Considered audiophile or music equipment stores, but they seem to...Last edited by ja1870; 07-02-2014, 04:36 PM. -
Re: New Members - please post your introductions here
Hi all,
I've either started to collect vintage electronics, or perhaps am a bit of a hoarder.
So far my couple of quarter-century-old Macs are still going, but visibly-distressed capacitors definitely killed the motherboards and PSUs of a few vintage PCs.
It seems to me "caps gone bad" are the bane of many types of consumer electronics considered "disposable" by the manufacturers. (Forget about wall-wart power supplies.)
No problems with higher level...Leave a comment:
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