Digest for sci.electronics.repair@googlegroups.com - 25 updates in 5 topics

amdx <nojunk@knology.net>: Sep 05 12:12PM -0500

On 9/4/2015 5:03 PM, micky wrote:
 
> Okay. I can remember that too. But I'm getting discouraged.
 
> I think I should follow Mark Lloyd's advice in next thread about using
> wires when one can.
 
Nothing to do with wires, just turning on the tv to watch, it takes to
to boot,
and you must wait in order to change the channel.
Mikek
before
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 05 07:08PM

On Thu, 03 Sep 2015 10:21:58 -0400, Ralph Mowery wrote:
 
> if you have say Direct TV you can get movies and other shows on demand
> bystreaming off the internet.
 
I don't have direct tv.
My router does not have a coax input.
 
I thought that was a coax cable coming out of all those direct tv
antennas I see on houses.
 
If the output of Direct TV is coax, how does that coax get "into" your
network?
 
It can't go through the router.
How does it get into your router without a coax connector on the router?
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 05 07:10PM

On Thu, 03 Sep 2015 10:49:10 -0400, gfretwell wrote:
 
> My Samsung will take a USB mouse/keyboard but it is pretty clunky
> searching the web.
 
I guess a USB wired mouse and keyboard would be useful.
 
Do most of these WiFi TVs have the ability to accept a typical USB mouse
and keyboard?
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 05 07:12PM

On Thu, 03 Sep 2015 18:36:31 -0400, Nil wrote:
 
> and I haven't bothered to try to troubleshoot it, since it's nothing I'm
> interested in using. If I want to browse the web I'll just use one of
> the several other computer devices in the house.
 
I went over to a friend's house who had a new samsung wifi tv and the
browsing was so slow that I'd say it's unusable for two reasons:
1. Typing the URL with the remote was punitive, and,
2. Once you had the URL, the time to load was interminable.
 
This might just be a bad Samsung TV, but, wow. It's great for checkboxes
but it doesn't work in real time.
micky <NONONOmisc07@bigfoot.com>: Sep 05 03:16PM -0400

In sci.electronics.repair, on Sat, 5 Sep 2015 12:12:45 -0500, amdx
>and you must wait in order to change the channel.
> Mikek
>before
 
That's bad too. I hate my smart phone because it takes so long to turn
on, and 5 steps to turn off. The "bar" phone I used to use turned on or
off in a second or two.
 
My Philips DVDR, which does it's main job very well but has a bunch of
design flaws, takes noticeably longer to change channels than does the
Zenith set-top box.
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 05 07:20PM

On Thu, 03 Sep 2015 19:40:40 -0700, Ameri-Clean wrote:
 
> I recently got a smart TV then got a message from my provider (DIRECTV)
> that I need to connect to the internet.
 
The output from the Direct TV is a coax cable, right?
How does that coax cable connect to your router?
Nil <rednoise9@REMOVETHIScomcast.net>: Sep 05 03:52PM -0400

On 05 Sep 2015, Ewald Böhm <ewvesb@gilltaylor.ca> wrote in
alt.home.repair:
 
> The output from the Direct TV is a coax cable, right?
> How does that coax cable connect to your router?
 
It doesn't. The TV network connection is via the common wireless or
ethernet cable.
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 06 02:48AM

On Sat, 05 Sep 2015 15:52:39 -0400, Nil wrote:
 
> It doesn't. The TV network connection is via the common wireless or
> ethernet cable.
 
So, help me here.
 
Let's say the DirectTV dish is on the roof, and it has a coax cable that
goes down the side of the house, through a wall, to a wall plate.
 
From that wall plate, how does "it" (i.e., the tv signal) get on my
"network"?
 
You said the tv signal gets into the network via either the wireless
connection or through the wired ethernet (cat5) cable.
 
But, how does that coax cable tv signal get to either one of those (i.e.,
how does the coax connect to the wifi or the ethernet cable)?
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 06 02:49AM

On Sat, 05 Sep 2015 17:57:53 -0500, Charlie Hoffpauir wrote:
 
> my home network into. I think some of the newer boxes also have wireless
> capability, or maybe they provide a separate device to connect
> wirelessly.
 
Oh. That explains it!
 
So, the coax cable that comes out of the dish on the roof then goes into
a "box" which has, as outputs, either coax or RJ45 or a wifi antenna?
 
Is that correct?
whit3rd <whit3rd@gmail.com>: Sep 06 02:46AM -0700

On Saturday, September 5, 2015 at 7:49:36 PM UTC-7, Ewald Böhm wrote:
> > capability,
 
> So, the coax cable that comes out of the dish on the roof then goes into
> a "box" which has, as outputs, either coax or RJ45 or a wifi antenna?
 
There are 'cable' systems that provide Ethernet I/O, and satellite
systems that provide an Ethernet socket (on older ones, telephone modem),
which is intended for Internet connection through your OTHER network
services. Satellite receivers rarely include any transmit-back-to-the-satellite
provisions, meaning they don't support full internet connection.
 
DirecTV says "we bundle with top internet providers", because the
internet service is distinct from the satellite receiver of television programming.
DaveC <not@home.cow>: Sep 05 01:28PM -0700

Help with identifying a TO-92 transistor?(at least I think it's a
transistor…)
 
Pretty vanilla-looking with National Semi logo. Marked:
 
NS 444
ST
13903
 
(The "NS" is the logo.)
 
Not enough 4's to make up a standard 2N number, and 13903 looks like a date
code?
 
Ideas?
 
Thanks,
DaveC <not@home.cow>: Sep 05 02:18PM -0700

> Help with identifying a TO-92 transistor?
 
A photo:
 
http://i.imgur.com/z78xG5D.jpg
"Tim Williams" <tmoranwms@charter.net>: Sep 05 08:52PM -0500

How's it measure?
 
(Or if it's dead, is there another one probably working that you can test?)
 
Tim
 
--
Seven Transistor Labs
Electrical Engineering Consultation
Website: http://seventransistorlabs.com
 
"DaveC" <not@home.cow> wrote in message
news:0001HW.1B9B87FD00098A2611E4F83CF@news.eternal-september.org...
DaveC <not@home.cow>: Sep 05 09:40PM -0700

> How's it measure?
 
> (Or if it's dead, is there another one probably working that you can test?)
 
> Tim
 
Dead. Other with identical markings measure as NPN. What else to determine
from measurements?
 
Thanks.
John Robertson <spam@flippers.com>: Sep 05 09:52PM -0700

On 09/05/2015 2:18 PM, Dave C wrote:
>> Help with identifying a TO-92 transistor?
 
> A photo:
 
> http://i.imgur.com/z78xG5D.jpg
 
Looks like a house number - made by National of course. House numbers
can sometimes cross reference to other parts if you can find a master list.
 
How made the item in question.
 
John :-#)#
 
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
DaveC <not@home.cow>: Sep 05 11:05PM -0700

> [Who] made the item in question. [?]
> John :-#)#
An American offset printing equipment company. It's a paper/envelope feeder
for a small offset presses. Extinct company.
 
I can say that the bandwidth requirement of the circuit is very small—DC-10
KHz—and low current. Don't know about gain.
 
Thanks.
N_Cook <diverse@tcp.co.uk>: Sep 06 07:46AM +0100

On 05/09/2015 21:28, DaveC wrote:
> code?
 
> Ideas?
 
> Thanks,
 
Or maker ST and date code for 1994 or 2004 or whatever goes with NS as
plant/batch code for a particular decade
John Robertson <spam@flippers.com>: Sep 06 12:05AM -0700

On 09/05/2015 11:05 PM, DaveC wrote:
 
> I can say that the bandwidth requirement of the circuit is very small—DC-10
> KHz—and low current. Don't know about gain.
 
> Thanks.
 
There are pretty simple circuit diagrams out there to measure gain if
you have more transistors with the same markings.
 
One example:
 
http://electriciantraining.tpub.com/14179/css/14179_111.htm
 
The only other criteria are breakdown voltage and current. If it only
drives other transistors and resistors to Vcc are over around 2K then it
is likely 100ma or less.
 
If you know the Vcc you know the minimum breakdown voltage unless it is
being used to control solenoids that have their own B+ source, then that
voltage is your absolute minimum (times at least 2).
 
John :-#)#
 
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
piglet <erichpwagner@hotmail.com>: Sep 06 08:11AM +0100

On 06/09/2015 07:05, DaveC wrote:
> I can say that the bandwidth requirement of the circuit is very small—DC-10
> KHz—and low current. Don't know about gain.
 
> Thanks.
 
You could try a 2N3904 or other jelly bean type and see if the thing
then works?
 
piglet
jango2 <crow_slapper@yahoo.co.uk>: Sep 05 10:49PM -0700

The unit would power up (green l.e.d.) with no backlight and then run into SOS with a 2 red l.e.d. blink pattern.
I noticed the main electrolytic filter (270uF 450V) in the PS was bulging.
Replaced and it worked.
Case archived.
Ewald Böhm <ewvesb@gilltaylor.ca>: Sep 06 02:50AM

On Fri, 04 Sep 2015 11:59:08 -0500, Mark Lloyd wrote:
 
> WPA2/PSK is one thing that is needed. Another is a better ESSID.
 
You need both.
One without the other is worthless.
"Ian Field" <gangprobing.alien@ntlworld.com>: Sep 05 07:01PM +0100

"M.Joshi" <M.Joshi@eternal-september.org> wrote in message
news:4f7214e111488d2b604a399ff55@news.eternal-september.org...
> old tapes. It worked for a while, but no longer loads any tapes? No matter
> how far I push the tape in, it won't load it into the mechanism.
 
> I have taken the cover of the unit off but can't see anything obvious?
 
The old favourite was the sensor bulb blown - its a thin vertical post in
the middle of the deck that pokes up a hole in the bottom of the cassette.
 
Later models used an IR LED - AFAIK: these never caused problems, so might
be a belt job as others have suggested.
M.Joshi <M.Joshi@eternal-september.org>: Sep 05 06:05PM

Thanks for the replies.
 
Is there anywhere online I can download a service manual for this? Haven't
managed to find a belt/kit yet.
 
M.Joshi <M.Joshi@eternal-september.org>: Sep 05 06:09PM

Hello Ian,
 
I did wonder if it was the tape sensor post - I have had to change the lamps
in the past on another unit.
 
However, I thought that was just to sense tape end? They appear to be the
IR type. The tape isn't being lowered into the mechanism so I guess it probably
is a snapped belt?
 
 
"Ian Field" <gangprobing.alien@ntlworld.com>: Sep 05 07:20PM +0100

"M.Joshi" <M.Joshi@eternal-september.org> wrote in message
news:4f7214e111528d2b6257b12887f@news.eternal-september.org...
 
> However, I thought that was just to sense tape end? They appear to be the
> IR type. The tape isn't being lowered into the mechanism so I guess it
> probably is a snapped belt?
 
Can't remember ever seeing a snapped belt - they do go limp and floppy
sometimes.
 
The synthetic rubber ones firm up with a short squirt in the microwave - the
natural rubber ones blister and shrivel up!
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