Digest for sci.electronics.repair@googlegroups.com - 9 updates in 6 topics

"Ian Field" <gangprobing.alien@ntlworld.com>: Sep 01 07:24PM +0100

<ohger1s@gmail.com> wrote in message
news:bd661045-a09e-419d-87c6-1f8c1c97ac75@googlegroups.com...
> his monitors, many just like this one. I seem to recall a horiz phase
> adjustment on the main board. Sometimes just tweaking this pot would lock
> in the picture.
 
The phase comparator compares the sync with a pulse from a winding on the
horizontal transformer. Its fed by a high value resistor - going high or
open is a very common fault.
Chuck <chuck@mydeja.net>: Sep 01 02:57PM -0500

On Thu, 1 Sep 2016 19:24:18 +0100, "Ian Field"
 
>The phase comparator compares the sync with a pulse from a winding on the
>horizontal transformer. Its fed by a high value resistor - going high or
>open is a very common fault.
 
 
This happens very rarely but I've seen a cap to ground open on this
line which causes the picture to shift.
 
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"Ian Field" <gangprobing.alien@ntlworld.com>: Sep 01 10:05PM +0100

"Chuck" <chuck@mydeja.net> wrote in message
news:du1hsbha7ba2b4ash9kbsi6vjmbkm02uio@4ax.com...
>>open is a very common fault.
 
> This happens very rarely but I've seen a cap to ground open on this
> line which causes the picture to shift.
 
It was common enough on TVs, and I've seen it on a few VGA monitors.
 
With some TV makes/models - it made it onto the stock fault list.
mhooker32@gmail.com: Sep 02 07:22AM -0700

On Thursday, September 1, 2016 at 5:04:11 PM UTC-4, Ian Field wrote:
> > line which causes the picture to shift.
 
> It was common enough on TVs, and I've seen it on a few VGA monitors.
 
> With some TV makes/models - it made it onto the stock fault list.
 
cap kit did the trick, nice image now. way in the corner of the board was a leaker you couldnt see until it was pulled. thanks to all for your help
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 02 09:23PM +0800

Maximum output of USB Type-C 2.0 is 20V, 5A. Could it kill??
 
 
 
Full story:
https://www.theguardian.com/technology/2016/mar/30/amazon-clamps-down-dangerous-usb-c-cables
 
Amazon has banned USB-C charging cables that do not comply with
specifications, awhich are considered dangerous as they can damage
devices they are used with and potentially cause safety risks.
 
The USB-C specification, which includes a reversible connector that can
plug in either way up, was designed as the do-it-all cable capable of
charging computers as well as smartphones, tablets and other low-power
gadgets.
 
Amazon's move sees it acting as a de facto quality control agent for the
USB-C cables, helping users steer clear of much needed but sub-standard
products. Many USB-C enabled devices come only with USB-C to USB-C
cables, not with cables for plugging into older chargers or computers –
which commonly have USB-A connections.
 
Designed under the USB 3.1 specification, USB-C can deliver a larger
amount of power than older USB cables allowing them to be used to charge
computers such as Apple's MacBook and Google's Chromebook, both of which
require significantly more power than smartphones do.
 
To do so, USB-C cables have a 56k ohm resistor that allows the power
supply and the device plugged into it to work out the correct power
level that suits both ends of the charging party, making sure the device
does not draw more power than the plug can supply.
The Amazon sign
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Amazon nows prohibit 'any USB-C (or USB Type-C) cable or adapter product
that is not compliant with standard specifications issued by 'USB
Implementers Forum Inc'." Photograph: Reed Saxon/AP
 
Unfortunately some USB-C cables have been made with the incorrect
resistor, typically only 10k ohm, which means that it is possible for
the device to draw more power than the plug can safely supply or
potentially for the plug to push more power than the device can take.
Others are wired incorrectly, which could destroy whatever they are
plugged into.
 
 
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ksroopa123456@gmail.com: Sep 02 04:36AM -0700

Busybizz is a unique service in which our team of experts thoroughly assess your power requirements, down to the minute details. Then they recommend and install the ideal gensets for you. If you ever need to service the gensets, you will find a Dealer in your very neighbourhood. Power finally is in your hands.
http://www.busybizz.com/Generator-Sales-Bangalore.php
N_Cook <diverse@tcp.co.uk>: Sep 02 12:33PM +0100

I expected one of my sites to be on archive.org, originally it was , but
not now
Looking at robots.txt file
(Currently )
User-agent: *
Disallow: /cgi-bin/
Disallow: /cgi/
 
(dec 2012 from archive.org )
# Default /robots.txt File for all Community Architect Partner pages
 
User-agent: *
Disallow: /cgi-bin/
 
I looked at the wiki on this , but does not explain what is/not involved
in "/cgi/" statement
 
I assume because its an ads paid for site and they get no revenue from
such caches, no remote linking allowed presumably for same reason.
1/ If I have access to that directory, I doubt I do, would changing it
back to as before corrupt operations? robots.txt has not appeared on any
directory listing I've made , while on upload/download access to it.
 
2/ On another site , via www access , there is no robots.txt, does that
mean it should turn up on archive.org (if it is aware of the site + page
that is) ?
Andy Burns <usenet@andyburns.uk>: Sep 01 07:39PM +0100

JW wrote:
 
> probably leave it that way as I think only my phone is capable of dual
> band operation, and according to the Internet (so it must be true) 2.4Ghz
> has better range and penetration through walls than 5GHz.
 
That's generally true, and if you're using 5GHz indoors it's usually a
good thing as it tends to keep everyone else's signal out (not that it's
so crowded to begin with, but usage is growing).
"pfjw@aol.com" <pfjw@aol.com>: Sep 01 09:53AM -0700

On Thursday, September 1, 2016 at 11:51:42 AM UTC-4, Suresh Garikipati wrote:
 
> https://photos.google.com/search/_tra_/photo/AF1QipMVUoACHpXyqNf9v0th6h4KwIfMNiPyEjbI9zRh
 
> https://photos.google.com/search/_tra_/photo/AF1QipOtgilsiXQSdY27nAH7ughl1d4vxKV8kmvUERs2
 
> https://photos.google.com/search/_tra_/photo/AF1QipOd_zERdrzik-x_nhFe3sNIemLj-XbZ0xsqYNpi
 
links are bad.
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