sci.electronics.repair - 23 new messages in 15 topics - digest

sci.electronics.repair
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Today's topics:

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TOPIC: Buttyful flowers
http://groups.google.com/group/sci.electronics.repair/t/60b1dd13b6c28aec?hl=en
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== 1 of 1 ==
Date: Mon, Aug 9 2010 11:12 pm
From: gayathri m

Buttyful flowers
http://www.123maza.com/dora/vvvvv

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TOPIC: Ripped speaker grill
http://groups.google.com/group/sci.electronics.repair/t/d0f91f3c190e10dd?hl=en
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== 1 of 5 ==
Date: Tues, Aug 10 2010 3:47 am
From: "N_Cook"

Someone asked me if I knew how to do an invisible/near invisible repair. So
far I've never been in that situation but it could easily happen. Anyone
successfully repaired one? I've a few ideas but nothing tried. Assume fancy
tinsel stranded, open weave mesh fabric, unobtanium exact match new fabric
to the original.

== 2 of 5 ==
Date: Tues, Aug 10 2010 4:05 am
From: Ron

On 10/08/2010 11:47, N_Cook wrote:
> Someone asked me if I knew how to do an invisible/near invisible repair. So
> far I've never been in that situation but it could easily happen. Anyone
> successfully repaired one? I've a few ideas but nothing tried. Assume fancy
> tinsel stranded, open weave mesh fabric, unobtanium exact match new fabric
> to the original.
>
>

Take it to an antiques restorer

== 3 of 5 ==
Date: Tues, Aug 10 2010 4:49 am
From: "N_Cook"

Ron <ron@lunevalleyaudio.com> wrote in message
news:ooadnUA4qa7_r_zRnZ2dnUVZ8jOdnZ2d@bt.com...
> On 10/08/2010 11:47, N_Cook wrote:
> > Someone asked me if I knew how to do an invisible/near invisible repair.
So
> > far I've never been in that situation but it could easily happen.
Anyone
> > successfully repaired one? I've a few ideas but nothing tried. Assume
fancy
> > tinsel stranded, open weave mesh fabric, unobtanium exact match new
fabric
> > to the original.
> >
> >
>
> Take it to an antiques restorer

I happen to know a textiles restorer, usually material like Nelson's Victory
red ensign restoration (not repairing the shrapnel holes) but worth asking
him next time I see him.

== 4 of 5 ==
Date: Tues, Aug 10 2010 6:23 am
From: Meat Plow

On Tue, 10 Aug 2010 11:47:17 +0100, N_Cook wrote:

> Someone asked me if I knew how to do an invisible/near invisible repair.
> So far I've never been in that situation but it could easily happen.
> Anyone successfully repaired one? I've a few ideas but nothing tried.
> Assume fancy tinsel stranded, open weave mesh fabric, unobtanium exact
> match new fabric to the original.

Order the original grill cloth if possible and replace. If not match as
close as possible.

--
Live Fast, Die Young and Leave a Pretty Corpse

== 5 of 5 ==
Date: Tues, Aug 10 2010 12:58 pm
From: "Dave M"

N_Cook wrote:
> Someone asked me if I knew how to do an invisible/near invisible
> repair. So far I've never been in that situation but it could easily
> happen. Anyone successfully repaired one? I've a few ideas but
> nothing tried. Assume fancy tinsel stranded, open weave mesh fabric,
> unobtanium exact match new fabric to the original.

Take a look here (http://www.grillecloth.com/) and try to match or closely
approximate the cloth on your speakers. If you're looking for an exact
match, your best bet would be to replace the cloth on all speakers.

--
David
dgminala at mediacombb dot net

==============================================================================
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http://groups.google.com/group/sci.electronics.repair/t/ebc63ed4e3625960?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Aug 10 2010 4:15 am
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==============================================================================
TOPIC: ABB inverter schematic?
http://groups.google.com/group/sci.electronics.repair/t/516159452de4d08b?hl=en
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== 1 of 2 ==
Date: Tues, Aug 10 2010 6:53 am
From: "Dave H."

Hi, I have an ABB ACS-301-4P9-3 VFD invertor that I would like to get a
schematic for - it was dropped (hard!) by the UPS man, and all appears to be
working except the programming panel and display - so I can't configure it
for the motor I'm using!

Some investigation revealed that there's no DC to the panel, cable and
connectors checked and OK, and rather than dive in to the (surface mount)
board blind, I could really use a schematic for the main (processor) board,
or the whole thing! The man at ABB's agent in t he UK says "It's obsolete,
and we wouldn't have repaired it anyway, so no service info - buy a new
one!"

Any help would be really appreciated,

Dave H.

== 2 of 2 ==
Date: Tues, Aug 10 2010 10:33 am
From: "Michael A. Terrell"

"Dave H." wrote:
>
> Hi, I have an ABB ACS-301-4P9-3 VFD invertor that I would like to get a
> schematic for - it was dropped (hard!) by the UPS man, and all appears to be
> working except the programming panel and display - so I can't configure it
> for the motor I'm using!
>
> Some investigation revealed that there's no DC to the panel, cable and
> connectors checked and OK, and rather than dive in to the (surface mount)
> board blind, I could really use a schematic for the main (processor) board,
> or the whole thing! The man at ABB's agent in t he UK says "It's obsolete,
> and we wouldn't have repaired it anyway, so no service info - buy a new
> one!"
>
> Any help would be really appreciated,
>
> Dave H.

Ask on news:rec.crafts.metalworking

==============================================================================
TOPIC: Surface mount spark gap?
http://groups.google.com/group/sci.electronics.repair/t/55e12efb32f304c4?hl=en
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== 1 of 1 ==
Date: Tues, Aug 10 2010 8:41 am
From: Robert Macy

On Aug 7, 12:37 am, "N_Cook" <dive...@tcp.co.uk> wrote:
> Adrian C <em...@here.invalid> wrote in message
>
> news:8c2vjrF4q5U1@mid.individual.net...
>
> > On 06/08/2010 17:16, N_Cook wrote:
> > > What a plonker. Now it is knocking out 48V DC, its function is obvious.
> It
> > > would have been much more obvious if it was not at the edge of the board
> > > with the L missing off the overlay designation ED201, and a more obvious
> > > window in the casing.
>
> > A photon gap then?
>
> > :-)
>
> > --
> > Adrian C
>
> I did discover that there are such things as SM gas discharge
> tubes/arresters

One time we used a series of gas tube spark gaps for protecting the
circuitry, but could not figure out why they weren't meeting spec and
firing closer to 400 V than over 600, until...some enlightened person
suggested that maybe it was because we stuck them inside a dark oil
tank and there was no light! yes, that was it. Later we noticed the
problem went away when the gas was somehow 'pretriggered'. and didn't
matter whether in light or dark. Radioactive isotope doping?

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TOPIC: Weird telephone problem
http://groups.google.com/group/sci.electronics.repair/t/5b67728e19c05524?hl=en
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== 1 of 1 ==
Date: Tues, Aug 10 2010 8:43 am
From: Bill Janssen

David Lesher wrote:
> Agree re: corroded wiring connection as likely cause.
>
> Go to each jack and put a *milliammeter* across Tip-Ring.
> Start at the demark.
>
The milliampmeter should be in series with a 400 Ohm resister. The
resister represents the resistance
in the phone.

Bill K7NOM
> You should see 20+ mA. If you don't, it's the wiring or jack.
>
> As a next step, put the meter in series with a phone, and see if the off-hook
> current is still >20mA.
>
> The first indicts the upstream wiring; the 2nd is likely the phone.
>
>
>

==============================================================================
TOPIC: Simple hack to get $3000 to your home
http://groups.google.com/group/sci.electronics.repair/t/4ae34b6165b56ab6?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Aug 10 2010 8:56 am
From: Brazil Acctressess

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==============================================================================
TOPIC: 125 VAC motor won't start
http://groups.google.com/group/sci.electronics.repair/t/a1adec446eb7f728?hl=en
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== 1 of 1 ==
Date: Tues, Aug 10 2010 9:35 am
From: Alan Douglas

>> Hi all I have a pump with a 2HP 125 V AC motor. All of a sudden the
>> motor wont start anymore. If I switch it on it just does a humming sound
>> and then thermal protection kicks in.

The motor probably has a starting winding, capacitor, and centrifugal
switch in series across the AC line. As noted, the most likely
problem is the capacitor, but the switch could also be open, possibly
by a bit of dirt between the contacts.

Without the starting winding, yes, the motor will run equally well in
either direction.

==============================================================================
TOPIC: Universal Remote control , more universal mod?
http://groups.google.com/group/sci.electronics.repair/t/ddfa1b325765e99a?hl=en
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== 1 of 1 ==
Date: Tues, Aug 10 2010 11:06 am
From: Cydrome Leader

Meat Plow <mhywatt@yahoo.com> wrote:
> On Sun, 08 Aug 2010 15:44:09 -0400, Michael A. Terrell wrote:
>
>> Meat Plow wrote:
>>>
>>> I could whistle at 2600hz and hang up the central opertator line. I
>>> made a blue box for a friend but he got busted before he used it. He
>>> was a greek with dual citizenship and had a girlfriend in Greece he
>>> would call using a reel to reel tape with some prerecorded tones on it.
>>> He got the idea from one of his greek buddies that was here visiting
>>> that built a working blue box and recorded the tones and their
>>> sequences on tape. The box was easy to build, all tin can 741 op amps
>>> on a self etched PC board. Problem was tuning it, I was only 17 back
>>> then and had no way to tune it. Said friend was set to take it to
>>> school electronics class and tune it when the FBI hauled him off one
>>> early morning in his boxer shorts :) He was deported back to Greece and
>>> lost his US citizenship.
>>
>>
>> Even 'Dr. Johnny Fever' knew not to mess with the Phone Cops! ;-)
>
> They found out in part by talking to his girlfriend. She explained that
> he used a tape device. I stayed at his place the night before so i was
> there at 6 am Sunday morning when they came a knockin on his door. I was
> zipped up in a sleeping bag peering through an opening when he answered
> the door (had a safety chain) opening it part way just enough for an arm
> holding a gold badge to pop through :) I stayed in the bag while they
> looked for a tape device which he didn't have there at the time. They
> found a loop of tape on an Echoplex tape delay box for guitar that he had
> and un-looped it with a pencil thinking they found the evidence :) They
> asked him who was inside the sleeping bag and he said just a friend and
> they never bothered me. He had hid the blue box pretty well and it wasn't
> found because they found the tape quickly so they were satisfied they had
> what they were looking for. When they left I dug out the blue box and
> destroyed it. Since they really had no evidence of a device that could
> make the calls but knowing the calls came from his number back when he
> was living with his parents they could only deport him and revoke his
> citizenship. He never went on trial for the calls. Just was given a plane
> ticket and said see ya later. They probably made it impossible to get a
> visa back into the country since I never saw him again. But he did call me
> maybe 10 years later from Greece. He said he was in a friends recording
> studio. That was in 1982.

that's amusing.

in the early 90s I recall red boxes still worked in some parts of Chicago.

You'd frequently get an operator who would ask something scripted like
"are you using an illegal dialing device?" and then they'd keep requesting
that you add quarter to the payphone.

They'd even ask you to "please wait by the phone" if you just kept jamming
on * and 6 or whatever the buttons were emulating a quarter.

==============================================================================
TOPIC: Washing machine - beyond economic repair.
http://groups.google.com/group/sci.electronics.repair/t/e3cd8c62c3e5669d?hl=en
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== 1 of 2 ==
Date: Tues, Aug 10 2010 12:28 pm
From: "ian field"

http://www.craigboyce.com/Videos/WashingMachineMayhem.shtml

== 2 of 2 ==
Date: Tues, Aug 10 2010 1:07 pm
From: "William Sommerwerck"

So much for advanced anti-vibration design...

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TOPIC: jazz dv-150 camcorder
http://groups.google.com/group/sci.electronics.repair/t/315b650683450243?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Aug 10 2010 3:24 pm
From: jon

I inserted batteries and a sd card 4gb . on the lcd screen it just
says read card. is there any way to get it to work right.

==============================================================================
TOPIC: Cause of blown fuse.
http://groups.google.com/group/sci.electronics.repair/t/e4e620ad717ceda2?hl=en
==============================================================================

== 1 of 3 ==
Date: Tues, Aug 10 2010 4:54 pm
From: Sjouke Burry

Today, somebody donated an Akay AA-MBL radio/amplifier to me.
Not operational, on investigation two blown 15 amp fuses, by
the look of it, in the power amplifier.
Fuses replaced by 2X 6 amp , and to my surprise, everything
started working.

Now fuses dont blow just to surprise you.

So, how did the former owner manage to blow both?

== 2 of 3 ==
Date: Tues, Aug 10 2010 5:42 pm
From: "William Sommerwerck"

> Now, fuses don't blow just to surprise you.

No, they don't.

"Something" caused a momentary high current drain that popped the fuses,
which sacrificed their existance to save the equipment. What this
"something" was is not always obvious. It could have been due to cranking up
the volume and clipping the amp for an extended period. It could have been
due to brief high line voltage. It could have been due to kicking the power
cord, causing an intermittent connection at the wall socket or cable socket
on the amp. It could be due to thermal fatigue.

To answer the question you're /really/ asking, but didn't ask... It's quite
possible for fuses to blow without there actually being anything permanently
"wrong" with the amplifier. The probability that this amp is defective in a
way that will cause it to explode or burst into flames is small.

== 3 of 3 ==
Date: Wed, Aug 11 2010 12:20 am
From: "N_Cook"

Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> wrote in message
news:4c61e6ce$0$14123$703f8584@textnews.kpn.nl...
> Today, somebody donated an Akay AA-MBL radio/amplifier to me.
> Not operational, on investigation two blown 15 amp fuses, by
> the look of it, in the power amplifier.
> Fuses replaced by 2X 6 amp , and to my surprise, everything
> started working.
>
> Now fuses dont blow just to surprise you.
>
> So, how did the former owner manage to blow both?

Self-healed capacitor short?

==============================================================================
TOPIC: Lisa McCants - Rosewood Hudson Property Report
http://groups.google.com/group/sci.electronics.repair/t/9ff614a2f6fbf520?hl=en
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== 1 of 1 ==
Date: Tues, Aug 10 2010 7:07 pm
From: Anonymous

ROSEWOOD HUDSON PROPERTY REPORT

Distress sale by owner/occupant, Lisa McCants

2608 Wade Road SE #101, DC 20020

Please contact John Harvey on 540-767-7800 for more details.

==============================================================================
TOPIC: GERMANY GIRLS SECRET SEX VIDEOS
http://groups.google.com/group/sci.electronics.repair/t/407cc687d69c2d3a?hl=en
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== 1 of 1 ==
Date: Tues, Aug 10 2010 10:04 pm
From: paypal cash

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Due to high sex content, i have hidden the videos in an image.in that
website on right side below search box click on image and watch
videos in all angles.

==============================================================================
TOPIC: Boss GT-6B multiple guitar effects pedal board, 2005
http://groups.google.com/group/sci.electronics.repair/t/f773b40f9461ca34?hl=en
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== 1 of 1 ==
Date: Wed, Aug 11 2010 12:22 am
From: "N_Cook"

Two of these known to the owner of this one have shown the same symptoms,
but never connected together in any way.
The other one apparently corrected by a factory reset (coincidence?)
At switch on the display continuously scrolls as though one of the up or
down bank select pedals
is active, ie looks like the action of someone continuously turning the
rotary encoder switch.
Have taken apart but not reassembled yet , unenclosed .
Only 0.2mm differentiating first touch to click over of the very basic click
switches under all the
foot pedals. The "wah-wah" switch is different action. Is it a stock fault
of deflecting steelwork/pivot wear/bending pcb/expanding soft inserts?
causing engagement of these switches, then just washer packings to correct
for a short time until the problem re-emerges) or something more
electronic/software or internal rotary encoder problem

==============================================================================

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