sci.electronics.repair
http://groups.google.com/group/sci.electronics.repair?hl=en

sci.electronics.repair@googlegroups.com

Today's topics:

* Rare 18 amp fuse in Panasonic microwave - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/1942a360b304cf93?hl=en
* Lionel train question - 3 messages, 3 authors
http://groups.google.com/group/sci.electronics.repair/t/96607f75fdffab21?hl=en
* I bought a Moto G from Motorola, and it doesn't come with a CHARGER! - 14
messages, 11 authors
http://groups.google.com/group/sci.electronics.repair/t/a656ae396ed31d8e?hl=en
* HP Laserjet 4000 paper jam and other issues. - 2 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/8620b1cad620b4b9?hl=en
* Centronix gender? - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/11a01a13e1df3c26?hl=en
* Root cause insight into the common BMW blower motor resistor failures - 3
messages, 3 authors
http://groups.google.com/group/sci.electronics.repair/t/b6c594f4d879a6b1?hl=en
* How to properly feed GPS navigation prompts into a bluetooth earpiece? - 1
messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/ff70bbb8288b005e?hl=en
* How do I get Voice-to-Text back in my Android 4.3 for SMS texting? - 1
messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/73bd95f6d9063aaf?hl=en

==============================================================================
TOPIC: Rare 18 amp fuse in Panasonic microwave
http://groups.google.com/group/sci.electronics.repair/t/1942a360b304cf93?hl=en
==============================================================================

== 1 of 1 ==
Date: Mon, Feb 3 2014 4:36 pm
From: cythrault@gmail.com


On Friday, May 26, 2006 9:37:13 PM UTC-4, James Sweet wrote:
> If it were my own oven, I'd try the 15A first and if that blows use a
> 20A. If a short occurs it'll blow that just as fast as the 18A. If this
> is for a customer though I would not go over 18A just because of
> liability issues.

Yah right! :)

I had this microwave repaired under warranty by a tech while I was out of town (my wife needed the microwave. :) The tech replaced the fuse by a 20A. It held for what.. 6 years? Now I need a new fuse. I won't bother and put a 20A.





==============================================================================
TOPIC: Lionel train question
http://groups.google.com/group/sci.electronics.repair/t/96607f75fdffab21?hl=en
==============================================================================

== 1 of 3 ==
Date: Mon, Feb 3 2014 5:43 pm
From: "hrhofmann@sbcglobal.net"


On Sunday, February 2, 2014 11:35:58 PM UTC-6, captainvi...@gmail.com wrote:
> I realize that this is probably not the correct forum to ask this question, however with so many talented people out there who subscribe to this group I was hoping that someone would either know the answer to this or perhaps be able to direct me to a more appropriate group. Some time ago I picked up a box of old mid 1950's Lionel trains, track, two small adjustable train transformers and some accessories. I just got finished going through the equipment, and with the addition of some new parts and labor have restored everything to good working order once again. The engine is a 2055 and it is married to a coal tender that has a whistle inside of it. The train motor operates on 0 - 16 VAC, but the whistle in the tender, (which is a small fan motor which blows air through some portals), I am told operates on DC. This DC voltage is somehow superimposed on the AC. The correct transformers for this set have levers that you would move to apply the DC to the track, operate the tender motor and blow the whistle, and would be either the KW or the ZW, neither of which came with the equipment in the box. After completing repairs, I confirmed that the tender whistle was working by taking the tender to a train show and trying it out on a test track. Since the small transformers included with this set get hot and are too small I've been using my bench variac through an isolation transformer to test the train. I tried to see if I could blow the whistle by connecting my DC power supply to the track, but the current peaked at over 6 amps and took out the power supply fuse twice. The variac didn't like it either and started to growl. I figure the train motor as well as the transformer secondary must be loading the DC supply heavily, and perhaps vice versa. I'm not really sure whats happening here. I subsequently found a larger transformer at another yard sale which is able to handle the current required to run the AC motor in he engine, but there is no whistle provision. I've set the train up in the play room temporarily with the larger transformer but it would really be nice if my 4 year old grandson could hear the whistle blow. Is it possible when the whistle is blown that the DC is being placed in series with the AC? Sounds crazy but I never tried that. This couldn't be very complicated. What am I missing here? Thanks, Lenny

You can't put the DC in parallel wiith the AC. I would put the DC supply in series with the AC supply from the transformer secondary that is running the engine. You might have to reverse the polarity of the dc to get the whistle to work. Let us know if this works. OR, contact a member of your local toy train club and talk to them to find out for sure how this should be connected.




== 2 of 3 ==
Date: Tues, Feb 4 2014 4:41 pm
From: "Maynard A. Philbrook Jr."


In article <3f68bc9d-b391-4402-81f1-69ab37f63da1@googlegroups.com>,
captainvideo462009@gmail.com says...
> I subsequently found a larger transformer at another yard sale which is able to handle the current required to run the AC motor in he engine, but there is no whistle provision. I've set the train up in the play room temporarily with the larger transformer but it would really be nice if my 4 year old grandson could hear the whistle blow. Is it possible when the whistle is blown that the DC is being placed in series with the AC? Sounds crazy but I never tried that. This
couldn't be very complicated. What am I missing here? Thanks, Lenny
>
>

Yes, It's been far too long :)

you have a normally closed momentary switch across a
DIODE that is in line with your AC doing to the tracks.
Or One could use a knife switch like was done back then!

The motor in the engine should be a universal type, which
means it'll operate on either or. But the whistle is DC only..

I also seem to remember there was a polarity requirement and
different tricks were used operating different DC items on the engine.

Smoke and noise.! Make sure you use appropriate diode and put a
snubber circuit across it, otherwise Mr L could get angry and fully
collapse on you at the wrong time!

Jamie





== 3 of 3 ==
Date: Thurs, Feb 6 2014 8:09 am
From: captainvideo462009@gmail.com


I like the idea of a diode with a NC switch across it. I'd like to try that one first. Regarding snubber circuits, I have used them in the past across arcing contacts in AC switching equipment. A typical configuration was a .50 ohm wirewound resistor in series with a .10uf cap. What was it you were thinking of for across the diode? Lenny





==============================================================================
TOPIC: I bought a Moto G from Motorola, and it doesn't come with a CHARGER!
http://groups.google.com/group/sci.electronics.repair/t/a656ae396ed31d8e?hl=en
==============================================================================

== 1 of 14 ==
Date: Mon, Feb 3 2014 10:32 pm
From: Cordell James


Have any of you bought the $200 Moto G smartphone?

Did yours come with a charger?
If not, what size charger do we need to buy?

My 16GB Moto G came from Motorola (not from Google Play)
and it arrived only with a white USB cable. There is no
charger! That stinks!

Now I have to buy a charger.
But, which 5V USB charger do I buy?
Nowhere in the package does it say the amps needed.





== 2 of 14 ==
Date: Tues, Feb 4 2014 12:37 am
From: Leviatan


A Cordell James se le ha ocurrido que:

> Have any of you bought the $200 Moto G smartphone?
>
> Did yours come with a charger?
> If not, what size charger do we need to buy?
>
> My 16GB Moto G came from Motorola (not from Google Play)
> and it arrived only with a white USB cable. There is no
> charger! That stinks!
>
> Now I have to buy a charger.
> But, which 5V USB charger do I buy?
> Nowhere in the package does it say the amps needed.

I think this is a reasonable measure.

We are all the day talking about saving the enviroment; producing less
electronic waste, etc... Now that every mobile has the same chrging
plug (with the known exception of Apple devices) and everybody changes
his mobile each two years, I see very logical that phones are sold
without charger (or even USB cord), as verybody has several of them at
home. Obviously, the price should reflect that save (and I think the
Moto G does).

Regarding to your question; any 1A charger will be more than enough...

--
Un saludo,
Alberto






== 3 of 14 ==
Date: Tues, Feb 4 2014 5:59 am
From: "SC Tom"




"Cordell James" <cordell.james@gmail.com> wrote in message
news:lcq1ic$lln$2@news.mixmin.net...
> Have any of you bought the $200 Moto G smartphone?
>
> Did yours come with a charger?
> If not, what size charger do we need to buy?
>
> My 16GB Moto G came from Motorola (not from Google Play)
> and it arrived only with a white USB cable. There is no
> charger! That stinks!
>
> Now I have to buy a charger.
> But, which 5V USB charger do I buy?
> Nowhere in the package does it say the amps needed.
>

The output of the charger really doesn't matter, as long as it meets the
minimum requirements of the device. IOW, if you have a 2.1A charger on hand
that you use for a tablet or other device, and it has the same µUSB plug as
the Moto, then you can use it without any chance of harm. It's only going to
draw what it needs; the charger isn't going to "force" 2.1A into it.
--
SC Tom






== 4 of 14 ==
Date: Tues, Feb 4 2014 6:39 am
From: Seth Goodman


In article <lcq1ic$lln$2@news.mixmin.net>, cordell.james@gmail.com
wrote:
>
> Have any of you bought the $200 Moto G smartphone?
>
> Did yours come with a charger?
> If not, what size charger do we need to buy?
>
> My 16GB Moto G came from Motorola (not from Google Play)
> and it arrived only with a white USB cable. There is no
> charger! That stinks!
>
> Now I have to buy a charger.
> But, which 5V USB charger do I buy?
> Nowhere in the package does it say the amps needed.


"How do I properly charge my device?

In order to keep the price low, Motorola made many cost-saving decisons.
In this case, our research showed that many people already had a
suitable Motorola charger available, or a PC or other device that can be
used to charge Moto G.

Any Motorola charger with the correct micro-USB tip will charge your
Moto G. You will see the best results when the output of the charger is
between 500 mA and 1.5 A. The higher the output, the faster your Moto G
will charge.

If your charger output is higher, the MOTO G will automatically restrict
the charging rate. If your charger is lower, it will simply take longer
to reach a full charge."

https://motorola-global-
portal.custhelp.com/app/answers/prod_answer_detail/a_id/97318/p/30,6720,
9050/action/auth

--
Seth Goodman




== 5 of 14 ==
Date: Tues, Feb 4 2014 7:15 am
From: Amanda Williams


Seth Goodman <seth_news@yahoo.com> wrote in
news:MPG.2d5ac5965ab3c0c989696@news.eternal-september.org:

> In article <lcq1ic$lln$2@news.mixmin.net>, cordell.james@gmail.com
> wrote:
>>
>> Have any of you bought the $200 Moto G smartphone?
>>
>> Did yours come with a charger?
>> If not, what size charger do we need to buy?
>>
>> My 16GB Moto G came from Motorola (not from Google Play)
>> and it arrived only with a white USB cable. There is no
>> charger! That stinks!
>>
>> Now I have to buy a charger.
>> But, which 5V USB charger do I buy?
>> Nowhere in the package does it say the amps needed.
>
>
> "How do I properly charge my device?
>
> In order to keep the price low, Motorola made many cost-saving
decisons.
> In this case, our research showed that many people already had a
> suitable Motorola charger available, or a PC or other device that can
be
> used to charge Moto G.
>
> Any Motorola charger with the correct micro-USB tip will charge your
> Moto G. You will see the best results when the output of the charger is
> between 500 mA and 1.5 A. The higher the output, the faster your Moto G
> will charge.
>
> If your charger output is higher, the MOTO G will automatically
restrict
> the charging rate. If your charger is lower, it will simply take longer
> to reach a full charge."
>
> https://motorola-global-
> portal.custhelp.com/app/answers/prod_answer_detail/a_id/97318/p/30,6720
,
> 9050/action/auth
>

Yeah any micro-usb charger will do... I use the same charger for my phone
and my tablet... it was originally a charger for an old long deceased
phone

--
Aw - Small but dangerous




== 6 of 14 ==
Date: Tues, Feb 4 2014 7:18 am
From: Tony Hwang


Cordell James wrote:
> Have any of you bought the $200 Moto G smartphone?
>
> Did yours come with a charger?
> If not, what size charger do we need to buy?
>
> My 16GB Moto G came from Motorola (not from Google Play)
> and it arrived only with a white USB cable. There is no
> charger! That stinks!
>
> Now I have to buy a charger.
> But, which 5V USB charger do I buy?
> Nowhere in the package does it say the amps needed.
>
Hi,
Won't it charge thru USB port? My laptop has feature to
boost USB output current to charge many different things
on USB port. Also There is Car DC 12V to USB charger you
can buy.




== 7 of 14 ==
Date: Tues, Feb 4 2014 10:51 am
From: "s|b"


On Tue, 4 Feb 2014 06:32:44 +0000 (UTC), Cordell James wrote:

> Now I have to buy a charger.
> But, which 5V USB charger do I buy?

Just stick in a USB-port on your computer. It'll charge. (You /do/ have
a computer, don't you? ;-)

--
s|b




== 8 of 14 ==
Date: Tues, Feb 4 2014 5:28 pm
From: Jeff Liebermann


On Tue, 4 Feb 2014 06:32:44 +0000 (UTC), Cordell James
<cordell.james@gmail.com> wrote:

>Have any of you bought the $200 Moto G smartphone?

Slow processor, 16GB maximum memory, no LTE, a crappy camera that
takes blurry photos, and a low contrast screen. However, it is cheap,
taudio is good, cellular range so-so, and it's well built.

>Did yours come with a charger?
>If not, what size charger do we need to buy?

The EU has decided that there should be exactly one standard charger.
<http://en.wikipedia.org/wiki/Common_External_Power_Supply>
Since you're expected to have exactly one charger for a wide
assortment of devices, the various vendors see no reason to supply you
with a spare charger. I consider this a good idea.
<http://sneezypb.tumblr.com/post/15864266395/one-day-son-all-of-these-perfectly-good-a-c>

>My 16GB Moto G came from Motorola (not from Google Play)
>and it arrived only with a white USB cable. There is no
>charger! That stinks!

I feel your pain. However, I don't think a $5-$10 charger on eBay or
Amazon will constitute a major investment.

>Now I have to buy a charger.

Yep.

>But, which 5V USB charger do I buy?

MicroUSB. If it has a USB connector, make sure it says for Android or
Non-Apple products. Most "universal" chargers with USB connectors
have two connectors. One for Apple, and one for everything else.

>Nowhere in the package does it say the amps needed.

<https://community.republicwireless.com/thread/17308>
<http://www.wirelessground.com/motorola-dual-port-usb-charger-with-cable.html>

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558




== 9 of 14 ==
Date: Tues, Feb 4 2014 5:39 pm
From: Oren


On Tue, 04 Feb 2014 19:51:11 +0100, "s|b" <me@privacy.invalid> wrote:

>On Tue, 4 Feb 2014 06:32:44 +0000 (UTC), Cordell James wrote:
>
>> Now I have to buy a charger.
>> But, which 5V USB charger do I buy?
>
>Just stick in a USB-port on your computer. It'll charge. (You /do/ have
>a computer, don't you? ;-)

I just bought a cordless drill. Unknown to me at the time, found out
on delivery, the battery charger has a USB port that will charge a
cell phone. Haven't tried the USB port yet, though.




== 10 of 14 ==
Date: Tues, Feb 4 2014 9:14 pm
From: Michael Black


On Tue, 4 Feb 2014, Jeff Liebermann wrote:

> On Tue, 4 Feb 2014 06:32:44 +0000 (UTC), Cordell James
> <cordell.james@gmail.com> wrote:
>
>> Have any of you bought the $200 Moto G smartphone?
>
> Slow processor, 16GB maximum memory, no LTE, a crappy camera that
> takes blurry photos, and a low contrast screen. However, it is cheap,
> taudio is good, cellular range so-so, and it's well built.
>
>> Did yours come with a charger?
>> If not, what size charger do we need to buy?
>
> The EU has decided that there should be exactly one standard charger.
> <http://en.wikipedia.org/wiki/Common_External_Power_Supply>
> Since you're expected to have exactly one charger for a wide
> assortment of devices, the various vendors see no reason to supply you
> with a spare charger. I consider this a good idea.
> <http://sneezypb.tumblr.com/post/15864266395/one-day-son-all-of-these-perfectly-good-a-c>
>
>> My 16GB Moto G came from Motorola (not from Google Play)
>> and it arrived only with a white USB cable. There is no
>> charger! That stinks!
>
> I feel your pain. However, I don't think a $5-$10 charger on eBay or
> Amazon will constitute a major investment.
>
More devices are coming this way. My four year old Sansa Fuze just came
with a cable, no AC adapter. When I got a Kobo Mini ebook reader last
year, it only came with a cable.

But you don't need to spend much. When I got a used TomTom One GPS
receiver at a Rotary Club garage sale last June, I immediately picked up a
couple of suitable AC adapters at garage sales, one for 25cents, one for
fifty cents. The fact that they are now standardizing on a USB type
connector does make it simpler. No need to dig through the box of
adapters to find one that has the right voltage, and then chances are good
the connector is the wrong size and/or the polarity is wrong for the
device. I already had some suitable USB type ac adapters from finding in
th garbage, but it was easier to buy those that day than dig through the
box.

Maybe people won't even need to buy at 50cent level, they can ask family
or friends if they have any lying around (and they may).

Michael




== 11 of 14 ==
Date: Thurs, Feb 6 2014 7:15 am
From: Danny D'Amico


On Tue, 04 Feb 2014 17:28:30 -0800, Jeff Liebermann wrote:

> The EU has decided that there should be exactly one standard charger.
> <http://en.wikipedia.org/wiki/Common_External_Power_Supply>

Hi Jeff,
I myself recently purchased the Moto G, so this is useful information.
http://farm6.staticflickr.com/5541/12344729295_b954a7ec30_o.gif

In point of fact, I read with interest everything you post, and after
reading your reference, one sentence struck me as particularly useful
with respect to what comes with the Moto G by default:
"A common EPS must include a cable with a Micro USB-B connector
for connecting to a mobile phone."

So, *that* explains why the Motorola Google Moto-G, which we know
does not come with a charger, at least comes with a USB cable!

PS: I've been clamoring for a common-charge standard since USB was
invented! I never bought an earbud, phones, cameras, GPS, etc. that
wasn't common (mini-USB in those days). People used to make fun of
me, but, now they're reaping the benefits of the idea that we really
don't need to have a separate charger format & connector for every
device.





== 12 of 14 ==
Date: Thurs, Feb 6 2014 7:18 am
From: Danny D'Amico


On Tue, 04 Feb 2014 15:15:26 +0000, Amanda Williams wrote:

> Yeah any micro-usb charger will do... I use the same charger for my phone
> and my tablet... it was originally a charger for an old long deceased
> phone

Not really but close enough.
The moto g specs say 1amp to 1.5 amp, IIRC.

That's *high* current for most chargers, which are usually, in my
experience anyway, about 500ma to about 800ma.

So, in *my* experience, *most* chargers don't meet the moto-g spec,
if the spec indeed is 1 amp and above.

And, certainly, you're not going to get a 1.5Amp charger for 3 bucks
as someone here had proposed. If you can, please post the URL to the
site and I'll buy a dozen! :)




== 13 of 14 ==
Date: Thurs, Feb 6 2014 7:19 am
From: Danny D'Amico


On Tue, 04 Feb 2014 08:18:08 -0700, Tony Hwang wrote:

> Won't it charge thru USB port? My laptop has feature to
> boost USB output current to charge many different things
> on USB port. Also There is Car DC 12V to USB charger you
> can buy.

Yes. But if the Moto-G spec is really 1 amp to 1.5 amp
recommended charger capability, the real question is
whether your laptop and car adapter can meet the current
spec for the Moto G.





== 14 of 14 ==
Date: Thurs, Feb 6 2014 7:59 am
From: Jeff Liebermann


On Thu, 6 Feb 2014 15:15:59 +0000 (UTC), Danny D'Amico
<danny@is.invalid> wrote:

>On Tue, 04 Feb 2014 17:28:30 -0800, Jeff Liebermann wrote:
>
>> The EU has decided that there should be exactly one standard charger.
>> <http://en.wikipedia.org/wiki/Common_External_Power_Supply>

>Hi Jeff,
>I myself recently purchased the Moto G, so this is useful information.
> http://farm6.staticflickr.com/5541/12344729295_b954a7ec30_o.gif
>
>In point of fact, I read with interest everything you post, and after
>reading your reference, one sentence struck me as particularly useful
>with respect to what comes with the Moto G by default:
> "A common EPS must include a cable with a Micro USB-B connector
> for connecting to a mobile phone."
>
>So, *that* explains why the Motorola Google Moto-G, which we know
>does not come with a charger, at least comes with a USB cable!
>
>PS: I've been clamoring for a common-charge standard since USB was
>invented! I never bought an earbud, phones, cameras, GPS, etc. that
>wasn't common (mini-USB in those days). People used to make fun of
>me, but, now they're reaping the benefits of the idea that we really
>don't need to have a separate charger format & connector for every
>device.

Your nightmare has only just begun. It's not quite a neat as it could
have been.
<http://blog.curioussystem.com/2010/08/the-dirty-truth-about-usb-device-charging/>
<http://www.instructables.com/id/Modify-a-cheap-USB-charger-to-feed-an-iPod-iPhone/>
Apple and the rest of the industry have gone separate ways in their
methods of negotiating the proper charging current. The result is
that you'll find chargers with two USB connectors, labeled Apple, and
everyone else. Also note the 3.1A charging current:
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=331119653295>

Since Apple chose to release it's iPhone 5 with a non EU standard
connector and charging system, one would have expected a reaction from
the standards manufacturers in Brussels. Note that there is no law
demanding that standard chargers be used. Well, it took about a year,
but it finally arrived:
<http://www.theinquirer.net/inquirer/news/2297365/eu-announces-compulsory-common-charger-standard>
Yawn.

Apple... think different, very different:
<https://www.google.com/search?q=apple+different&tbm=isch>

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558





==============================================================================
TOPIC: HP Laserjet 4000 paper jam and other issues.
http://groups.google.com/group/sci.electronics.repair/t/8620b1cad620b4b9?hl=en
==============================================================================

== 1 of 2 ==
Date: Tues, Feb 4 2014 1:24 am
From: "David Farber"


Jeff Liebermann wrote:
> On Mon, 3 Feb 2014 15:20:07 -0800, "David Farber"
> <farberbear.unspam@aol.com> wrote:
>
>> Initially there was a paper jam from the paper tray 2 which is the
>> drawer that slides into the bottom of the printer.
>
> Replace the feed roller RB1-8865 located above tray 2. If my
> guess(tm) is correct, the printer has never had any of the rubber
> parts replaced. Considering it's age, you might as well replace ALL
> the rubber. Cheap enough:
> <http://www.ebay.com/itm/320746402020>
>
>> The other malfunction
>> is that the pickup rollers for tray 2 are activated even if there is
>> no paper in the drawer.
>
> Congratulations. Your printer also has the HP exclusive sticky
> solenoid problem. How to fix it on an HP2200, HP2300, HP4250, etc.
> <http://www.learnbydestroying.com/jeffl/hp2200/hp2200.html>
> <http://www.learnbydestroying.com/jeffl/hp4200/hp4200.html>
> Unfortunately, I haven't bothered to make a web page for the HP4000
> series printers. It's similar to the others except that the solenoid
> is buried under additional layers of metal plates. I suggest you take
> photos to help with the reassembly.
> <http://marketpoint.files.wordpress.com/2011/03/lj40004100-025.gif>
> Tear the printer apart. Find the sticky solenoids. Clean off the
> sticky goo from BOTH the armature and solenoid core using solvent.
> Apply thin felt as shown. Demagnetize the solenoid core if you
> suspect that it's magentized.
> <http://www.learnbydestroying.com/jeffl/crud/hp2200-solenoid.wmv>
> Put Humpty Dumpty back together again. Be sure to thank HP for
> ignoring the problem since the earliest HP laserjet printers.

Hi Jeff,

I did clean (though probably not well enough) the sticky stuff off of the
solenoid which is used to control the lower "D" rollers. I used some
electrical tape as was suggested in the fix. Is the purpose of the felt or
electrical tape to muffle the sound when the solenoid is energized or is
there a mechanical reason as well? I'll take it out again, put some dc on
it, and see how it operates. I'll also replace the rubber parts.

Thanks for your reply.
--
David Farber
Los Osos, CA






== 2 of 2 ==
Date: Tues, Feb 4 2014 5:09 pm
From: Jeff Liebermann


On Tue, 4 Feb 2014 01:24:19 -0800, "David Farber"
<farberbear.unspam@aol.com> wrote:

>I did clean (though probably not well enough) the sticky stuff off of the
>solenoid which is used to control the lower "D" rollers. I used some
>electrical tape as was suggested in the fix. Is the purpose of the felt or
>electrical tape to muffle the sound when the solenoid is energized or is
>there a mechanical reason as well? I'll take it out again, put some dc on
>it, and see how it operates. I'll also replace the rubber parts.

Don't use electrical tape. My original version of the fix indicated
to use 2 layers of electrical tape. That worked for about 3 months,
when the tape got warm and fell off. I had to rework about 8 printers
where I had used tape. The felt has lasted much longer.

There are various thicknesses of felt available at the local hardware
store. The stuff in the photo is 2mm thick (including the backing
paper and NOT compressed). I also have some felt that's about 1mm
thick. Both work just fine but I would NOT go any thicker than 2mm.

The main purpose of the felt to reduce the sound, but it also may have
a secondary purpose. Running the solenoids off DC tends to magnetize
the cores. If the armature comes in contact with the core, it will
stick. See video at:
<http://www.learnbydestroying.com/jeffl/crud/hp2200-solenoid.wmv>
The felt provides the necessary air gap so that the armature doesn't
stick.

If replacing all the rubber parts and fixing the sticky solenoid
doesn't do the trick, there are some obscure problems that should be
investigates. The clutch that runs the feed roller (the one above the
paper tray) gets dirty and doesn't release. Tear it apart, clean out
the metal dust, and it should be ok. Another common problem is a
sticky paper height sensor. That's also above the tray. Clean with a
paint brush.

Good luck.
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558





==============================================================================
TOPIC: Centronix gender?
http://groups.google.com/group/sci.electronics.repair/t/11a01a13e1df3c26?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Feb 4 2014 2:04 pm
From: "Michael A. Terrell"



Cydrome Leader wrote:
>
> I hate molex connectors for this reason. The phase of the moon will make a
> the pins and shells go out of aligmment and then somebody force it,
> leaving it broken for the next use. I'm surprised there isn't some $450
> tool to pull the pins or shells back into the connector housing.


I've seen a lot of fake Molex connectors in PCs. Their logo was
missing on the shell, and the contacts.





==============================================================================
TOPIC: Root cause insight into the common BMW blower motor resistor failures
http://groups.google.com/group/sci.electronics.repair/t/b6c594f4d879a6b1?hl=en
==============================================================================

== 1 of 3 ==
Date: Tues, Feb 4 2014 7:24 pm
From: "WW"




"Bimmer Owner" wrote in message news:kisqep$jpd$2@news.albasani.net...

On Tue, 26 Mar 2013 09:43:58 -0700, trader4@optonline.net wrote:

> They do have that 16 pin chip there, doing something.
> It might receive the command and then output the appropriate PWM for
> rest of the circuit.

Someone had scoped the whole board, and it was DC voltage everywhere
(according to that reference). It's pretty clear there is no PWM.

The 16-pin surface mount chip seems to be a automotive temperature
compensated voltage regulator with a huge voltage range, according
to a lookup of the part number on it.

Here is the Elmos 10901D chip of my FSU as I cut it open today.
http://www4.picturepush.com/photo/a/12515632/img/12515632.jpg

I wish there was a way to get rid of that heavy fibrous plastic goop!
(What is that black fibrous tough stuff anyway?)

I have had good luck removing the stuff used on motorcycle voltage
regulators that were potted soaking in MEK Methyl ethyl ketone
(spelling?). Potent stuff. Use outdoors and keep your hands out of it. WW





== 2 of 3 ==
Date: Tues, Feb 4 2014 8:09 pm
From: "Ralph Mowery"



"WW" <ccco@nospambresnan.net> wrote in message
news:SvmdnW2SXJ10M2zPnZ2dnUVZ_tednZ2d@bresnan.com...
>
> I have had good luck removing the stuff used on motorcycle voltage
> regulators that were potted soaking in MEK Methyl ethyl ketone
> (spelling?). Potent stuff. Use outdoors and keep your hands out of it.
> WW

I don't know what it actually is but at work we desolved a potted firing
system for a boat motor with something called OCP. Really stinks. Don't
think I would want it in a car after it was used.



---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com





== 3 of 3 ==
Date: Wed, Feb 5 2014 12:16 pm
From: Paul Drahn


On 2/4/2014 8:09 PM, Ralph Mowery wrote:
> "WW"<ccco@nospambresnan.net> wrote in message
> news:SvmdnW2SXJ10M2zPnZ2dnUVZ_tednZ2d@bresnan.com...
>>
>> I have had good luck removing the stuff used on motorcycle voltage
>> regulators that were potted soaking in MEK Methyl ethyl ketone
>> (spelling?). Potent stuff. Use outdoors and keep your hands out of it.
>> WW
>
> I don't know what it actually is but at work we desolved a potted firing
> system for a boat motor with something called OCP. Really stinks. Don't
> think I would want it in a car after it was used.
>
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus protection is active.
> http://www.avast.com
>
My electronic assembly company built the electronic control unit for BMC
Chopper of Bend, Oregon. Now defunked. We used two-part black epoxy that
took 24 hours to completely cure. When applied it was water thin. Had to
prep the box with RTV to keep the potting from running out around the
connectors.

Paul





==============================================================================
TOPIC: How to properly feed GPS navigation prompts into a bluetooth earpiece?
http://groups.google.com/group/sci.electronics.repair/t/ff70bbb8288b005e?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Feb 6 2014 7:31 am
From: Danny D'Amico


Can someone explain how to force GPS navigation into my bluetooth earpiece?

I don't understand why BT GPS Naviation works for my bluetooth speaker,
but it doesn't work for my bluetooth earpiece.

Debugging on my Samsung Galaxy S3, I see something strange (to me):
http://farm8.staticflickr.com/7402/12344497644_7135787e7b_o.png

What I found, is there are (apparently?) two different kinds of BT!
a) Motorola Roadster (*connected to phone and media audio*)
b) Samsung HM1300 (*connected to phone audio*)

Hmmmmmm......
Are there two *different* kinds of bluetooth audio (media & phone)?

If that is the problem, how do I get the right kind of GPS audio into my
bluetooth earpiece just like it does with my bluetooth visor speaker?






==============================================================================
TOPIC: How do I get Voice-to-Text back in my Android 4.3 for SMS texting?
http://groups.google.com/group/sci.electronics.repair/t/73bd95f6d9063aaf?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Feb 6 2014 7:43 am
From: Danny D'Amico


All of a sudden, I lost the little microphone icon in my default SMS
text application on the T-Mobile Samsung Galaxy S3 on Android 4.3.
http://farm8.staticflickr.com/7373/12344496284_046d7946d1_o.png

This is an important omission, since I do offline speech-to-text
SMS text messages (I almost never use my fat fingers to text).

To get back that offline microphone app, I suspect I need to *install*
something, because it *was* there from the beginning - but now it's
(suddenly) gone!

But what free app do I download to get *back* that little microphone?





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