Digest for sci.electronics.repair@googlegroups.com - 9 updates in 5 topics

"Rod Speed" <rod.speed.aaa@gmail.com>: Feb 06 04:52PM +1100

"micky" <NONONOmisc07@fmguy.com> wrote in message
news:227s1g12me5onj0o1i6a79stskif7f50qt@4ax.com...
 
> The question is, when both buds are no longer in my ears, the device
> waits a while and turns off.
 
> How does it know that the earbuds are no longer in my ears?
 
I was going to say because it can no longer
shine a light from ear bud to the other...
 
One obvious approach would
be temperature or capacitance.
 
micky <NONONOmisc07@fmguy.com>: Feb 05 11:38PM -0500

I have a pair of Bose Hearphones, cheaper than hearing aids.
 
I only use it at meetings (which I don't go to because of Corona) and to
watch Law & Order on TV (because all the other shows are loud enough but
it's not.)
 
The device consists of a yoke with the on/off button, two leds, a
charging jack, and the battery, and two earbuds.
 
Each earbud has 3 microphones, they say**, and when being put in my ears
they sometimes squeal, which the manual says is normal. Feedback, I
guess.
 
The question is, when both buds are no longer in my ears, the device
waits a while and turns off.
 
How does it know that the earbuds are no longer in my ears?
 
 
 
**And it can be set to amplify what's in front, what's in front and to
the sides, and sounds from all diretions, so it probably does have 3
mikes per ear.
 
As good as this might sound, there are one or two other competitors.
Before I bought this I googled but didn't find them. One will play the
last 10 seconds back again, and iirc will play the last 10 seconds at
reduced speed. I'd feel real bad that I didn't get that one, except I
probably wouldn't use those things, at least at a lecture. If I were in
the market, I'd look at the others before buying any of them.
micky <NONONOmisc07@fmguy.com>: Feb 07 03:27AM -0500

In sci.electronics.repair, on Sat, 6 Feb 2021 15:42:04 -0800 (PST),
>> reduced speed. I'd feel real bad that I didn't get that one, except I
>> probably wouldn't use those things, at least at a lecture. If I were in
>> the market, I'd look at the others before buying any of them.
 
This is about one of the other companies, the one that replays.
https://www.hearingtracker.com/news/alangos-behear-hearables-take-on-bose-hearphones
 
And it turns out they don't make mine anymore ;-( but they'er still
for sale reconditioned, and much cheaper than I paid. Although the
battery has been cycled many times maybe.
 
>"News articles caution that there may be a link between Bluetooth wireless headphones like AirPods and cancer, but not all experts agree on the potential health health risks of wireless earbuds."
 
And I hadn't even thought about it, but this does have bluetooth, and
even though i never use it, there's no way to turn it off.
 
Peeler <trolltrap@valid.invalid>: Feb 06 10:18AM +0100

On Sat, 6 Feb 2021 16:52:10 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:
 
 
> shine a light from ear bud to the other...
 
> One obvious approach would
> be temperature or capacitance.
 
IOW, you haven't the foggiest, but you will mouth off in your known
"all-knowing" manner anyway, you subnormal senile know-it-all!
 
--
"Who or What is Rod Speed?
 
Rod Speed is an entirely modern phenomenon. Essentially, Rod Speed
is an insecure and worthless individual who has discovered he can
enhance his own self-esteem in his own eyes by playing "the big, hard
man" on the InterNet."
https://www.pcreview.co.uk/threads/rod-speed-faq.2973853/
micky <NONONOmisc07@fmguy.com>: Feb 05 11:37PM -0500

In sci.electronics.repair, on Mon, 1 Feb 2021 09:40:57 -0800 (PST), Tim
 
>We turn on our Emerson Model LF391EM4F flat screen, (manufactured 2013). The screen shows the Emerson logo, then there's a staticky pop noise and it shuts off.
 
>I tried unplugging it for a bit and plugging it back in. No luck. We've had it for a while, and TVs are dirt cheap now. But here's what seems weird.
 
>I'm teleworking so I have to be on line for work. When I unplugged it, our WiFi stopped. It came back up maybe 5 minutes or so later. Very annoying if you're on a video call. I was pretty sure I hadn't unplugged the cable box or router.
 
This won't help you at all, but I have two table radios, one on top of
another, and when I turn one on, a certain station I listen to on the
other goes totally silent!!
 
Dave Garrett <dave@compassnet.com>: Feb 06 11:08PM -0600

In article <ba97a461-101c-460d-b8ce-3924fb6848abn@googlegroups.com>,
petereasthope@gmail.com says...
 
> The Haynes manual has almost nothing about the relay.
> It's under the dash? In the engine compartment?
 
> Thanks, ... P.
 
Sorry for the delayed response. Should be under the dash near the
fusebox. Here's a thread with pictures that is specific to the CRX but
I'm fairly certain that most/all of the info contained within is
applicable to the Civic Si as well.
 
https://www.crxcommunity.com/viewtopic.php?f=3&t=56535
 
--
Dave
David Barnicoat <dave.barnicoat@btinternet.com>: Feb 07 11:36AM

> extremely useful, particularly if you do end up having to investigate
> the SMPS while it's powered up.
 
> R
 
Thanks very much for the info re service manual/schematic and the repair
faqs. I will check them out, I know I have 380 volts dc at the bridge
rectifier output.
D
Rayner Lucas <usenet202101@magic-cookie.co.ukNOSPAMPLEASE>: Feb 05 03:32PM

In article <351969505.634057982.756000.dave.barnicoat-
btinternet.com@News.Individual.NET>, dave.barnicoat@btinternet.com
says...
> > Does it use a wall-wart transformer/power supply?
 
> No it does not use a wall wart, internal power supply with soldered in fuse
> which is not open circuit.
 
Have you got the service manual? If not, it's downloadable here:
https://elektrotanya.com/samsung_hw-e450_sm.pdf/download.html
 
The troubleshooting flowcharts in the manual assume you're going to be
swapping out entire boards, but at least there are schematics to help
track things down to component level.
 
If you've confirmed that the fault is on the SMPS board, I'd check the
electrolytic capacitors (be sure to discharge them before touching
anything on the board) and high-wattage resistors (RS801, RA808) first,
as these are possible failure points that could be tested without
working on a live circuit.
 
The safety guide in https://www.repairfaq.org/sam/smpsfaq.htm is
extremely useful, particularly if you do end up having to investigate
the SMPS while it's powered up.
 
R
three_jeeps <jjhudak@gmail.com>: Feb 10 10:03AM -0800

On Wednesday, February 3, 2021 at 1:42:18 PM UTC-5, Jeff Liebermann wrote:
> PO Box 272 http://www.LearnByDestroying.com
> Ben Lomond CA 95005-0272
> Skype: JeffLiebermann AE6KS 831-336-2558
 
Yes, good point - it is rather tenacious. If the connection needs to be reworked in the future, it is a little tough to remove it. I've tried teflon tape on occasion and found that it slides and shifts around so much that it is hard to get a clean wrap so to speak. One good thing is that teflon tape has a very high dielectric strength, something like 6kv at 0.001 inch thick, (or is it 0.001? i forget). It would do quite well in RF applications.
J
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