Digest for sci.electronics.repair@googlegroups.com - 7 updates in 3 topics

bruce bowser <bruce2bowser@gmail.com>: Dec 25 08:31AM -0800

On Wednesday, September 16, 2020 at 11:49:53 AM UTC-4, legg wrote:
 
> I note that signal strength is reported low on
> the duff phone, before signal lost.
 
> Is the antenna replaceable?
 
(I know its a different maker, anyway:)
6 Tips to Boost Your iPhone's Battery Life
 
The iPhone has always been pretty good about battery life, particularly in terms of standby time, but something changed recently—and in a big way. Reports are all over the Web about how iPhone 4S owners in particular have noticed vastly reduced standby time compared to older iPhones, on the order of 10 to 15 percent reductions per hour, although other people are saying they don't see a problem at all.
 
It turns out there is something to this story, though: Apple has confirmed that a bug in iOS 5, not the iPhone 4S itself, is responsible for the poor battery life many people are seeing, and said that a fix is in the works. It turns out that the iOS 5 bug means you'll also see the problem with an older iPhone, or possibly even an iPad or iPod touch, if you install the new OS on it.
 
Already have iOS 5? Here are six things you can do right now to boost your iPhone's battery life.
 
1. Set time zones manually. This time around, by default, iOS 5 tries to auto-adjust your time zone based on repetitive calls to the GPS radio, which is a huge battery drain. For now, turn this off: head to Settings -> Location Services -> System Services (which is located all the way at the bottom) -> Setting Time Zone. Note that this setting isn't in the Date & Time section, which makes it tough for people to find.
 
2. Disable location services when not needed. You can also disable all Location Services, which is a good rule in general for conserving battery life, but you'll need to re-enable it for GPS navigation and other tasks as necessary.
 
3. Disable as many notifications as possible.Notifications were a battery drain with earlier versions of the OS; I usually kept them turned off on test handsets, and saw several days of standby time on a charge even with Wi-Fi, Bluetooth, and GPS enabled. The new iOS 5 has a completely different notification system, with an Android-style pull-down bar at the top that collects multiple notifications and organizes them. In the process of adding this, Apple removed the global notification toggle in the Settings menu, so you can't just disable them all in one shot anymore. You can, however, disable app notifications, while leaving important ones (such as text and voicemail) intact. In other words, you can turn it back into an approximation of the original system, which separated call notifications from app notifications automatically.
 
Image representing iPhone as depicted in Crunc...
Image via CrunchBase
 
To do this, head to Settings -> Notifications, tap a given category (Phone, Messages, Reminders) or app (Walgreens, Zillow, and so on), and toggle Notification Center at the top to Off. The fewer notifications you enable, the more standby time you should see. While you're in there, note that you can change the way they appear; you can return a given notification to an alert window in the center of the screen, the way it used to be, instead of with the new bar on top.
 
4. Check for e-mail manually. E-mail is another perennial battery drain; normally I set all accounts to receive updates manually (i.e. when I load the app), instead of at a set frequency or via "push." The same goes for Facebook and Twitter updates; if the app is constantly refreshing them in the background, it's hitting the radios and consuming power, and you're not even reading them.
 
5. Check for software updates. Right now, iOS 5.0 is still current, but be aware that there's a different procedure now: You can check for OS updates right from the phone, instead of using a USB cable and syncing with iTunes. Head to Settings -> General -> Software Update. Apple recently sent iOS 5.0.1 to developers, according to BGR; updates include bug fixes for battery life, among other things. Keep an eye on PCMag for the latest news on iOS updates as well.
 
6. Some minor things can still help. Finally, you can still do all the usual, old-school things to improve battery life, such as reducing screen brightness, disabling Wi-Fi and Bluetooth, and so on. The only one that really helps here, in my experience, is screen brightness, but you need it cranked to see the Retina Display in bright sunlight. This was never a big issue with the iPhone, though; the above tips, plus an eventual bug fix from Apple, should resolve the vast majority of battery life issues with iOS 5.
 
-- https://buzzonindia.wordpress.com/2011/11/03/6-tips-to-boost-your-iphones-battery-life/
 
(also stay off speaker phone and get an echo device)
bruce bowser <bruce2bowser@gmail.com>: Dec 24 10:47AM -0800

On Sunday, September 13, 2020 at 4:00:07 AM UTC-4, Fox's Mercantile wrote:
> Simple Green and finally denatured alcohol to get rid of the water.
 
> I'd say it came out pretty clean.
> <https://cdn.discordapp.com/attachments/685910956580405312/754506691353116722/unknown.png>
 
Alcohol can etch aluminum, marble, limestone, travertine and certain granites and it can remove plastics and various forms of carbon (like from valves).
"Peter W." <peterwieck33@gmail.com>: Dec 24 12:19PM -0800

a} Please read the MSDS for WD40. It is 100% volatile. Really.
b) The nasty, sticky skunge 'left behind' by WD40 is not from the WD40, but what was re-distributed by the WD40 all over everything.
c) How to get rid of it: There are various solvents that are quite effective depending on the substrate. Brake Cleaner is one. Carburetor Cleaner is another - again, depending on the substrate. There are many others. Ans there is always the dishwasher.
d) First-cause was not enough WD40 in the first place, sufficient to both dissolve and then rinse off the skunge.
e) WD40 is neither a lubricant, nor an anti-oxidant, nor a cleaner, nor much of anything else other than a material designed to displace water. And it does that exceedingly well. All the other 'off-label' stuff is much like adding aspirin, chelated iron and Karo syrup to Christmas Tree water. Does it work?
 
Peter Wieck
Melrose Park, PA
"ohg...@gmail.com" <ohger1s@gmail.com>: Dec 24 01:16PM -0800

On Thursday, December 24, 2020 at 3:19:47 PM UTC-5, Peter W. wrote:
> e) WD40 is neither a lubricant, nor an anti-oxidant, nor a cleaner, nor much of anything else other than a material designed to displace water. And it does that exceedingly well. All the other 'off-label' stuff is much like adding aspirin, chelated iron and Karo syrup to Christmas Tree water. Does it work?
> Peter Wieck
> Melrose Park, PA
 
Here's what bothers me about WD40 despite what the MSDS says. I've used it where there was no previous lubricant, and found later than it crusted over. I used it twice, once on an HDMI connector on the back of a bluray and the other on a micro USB connector on a wifi extender, both a bit touchy due to contact issues. Yes, I know it's not a contact preservative but any clean lube works fine off label. Several months later, both quit working. Removing the connectors revealed white crusty material on both the connector and inside the cables. I ended up using WD to flush out the crusties and then flushed out the WD with Free All. No more problems.
Ralph Mowery <rmowery28146@earthlink.net>: Dec 24 10:19PM -0500

In article <8329151d-88c8-4b2b-9d4e-856c9e176fafn@googlegroups.com>,
ohger1s@gmail.com says...
 
> Here's what bothers me about WD40 despite what the MSDS says. I've used it where there was no previous lubricant, and found later than it crusted over. I used it twice, once on an HDMI connector on the back of a bluray and the other on a micro USB connector on a wifi extender, both a bit touchy due to contact issues. Yes, I
know it's not a contact preservative but any clean lube works fine off label. Several months later, both quit working. Removing the connectors revealed white crusty material on both the connector and inside the cables. I ended up using WD to flush out the crusties and then flushed out the WD with Free All. No more problems.
 
I have seen WD40 leave behind some crud also. Not sure if it was dust
it attracted or what, but it was crud. Free All did the same thing to
me on a piece of equipment. I do not let WD-40 in the house and use
Kroil to loosen stuck bolts.
I use other oils for lubrication.
Phil Allison <pallison49@gmail.com>: Dec 24 08:41PM -0800

Peter Wanker Raving Luantic & Pig wrote:
 
===================================
> a} Please read the MSDS for WD40. It is 100% volatile. Really.
 
** Pedantic tripe - like every post from the trolling nutter.

> e) WD40 is neither a lubricant,
 
** Contains lots of light oil.
 
> nor an anti-oxidant,
 
** The oil layer keeps oxygen and water at bay so it does that job.
 
> nor a cleaner,
 
** Dissolves greases and many other things in an instant.
 
> nor much of anything else other than a material designed to displace water.
 
** Very rarely used it for that.

But it does kill cockroaches pretty quick.
 
 
..... Phil
Daniel Fynn <fynnashba@gmail.com>: Dec 24 02:12PM -0800

On Thursday, December 24, 2020 at 2:00:19 PM UTC, HW wrote:
> You will also need a pull-up resistor and a diode.
 
> Try this:
 
> https://www.google.com/search?q=555+monostable+edge+trigger
Thanks
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