sci.electronics.repair - 25 new messages in 13 topics - digest

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

sci.electronics.repair@googlegroups.com

Today's topics:

==============================================================================
TOPIC: Marshall JCM 2000, 1998
http://groups.google.com/group/sci.electronics.repair/t/3338dc78a01d3b6d?hl=en
==============================================================================

== 1 of 6 ==
Date: Fri, Mar 11 2011 12:48 am
From: "N_Cook"

seconf attempt

Gareth Magennis <sound.service@btconnect.com> wrote in message
news:2edep.106250$ts7.49007@newsfe14.ams2...
>
>
> "N_Cook" <diverse@tcp.co.uk> wrote in message
> news:ilas70$gc9$1@news.eternal-september.org...
> > Arfa Daily <arfa.daily@ntlworld.com> wrote in message
> > news:rZ5ep.75494$To7.65089@newsfe12.ams2...
> >>
> >>
> >> "N_Cook" <diverse@tcp.co.uk> wrote in message
> >> news:ilan3u$j8g$1@news.eternal-september.org...
> >> > Blown primary of the mains Tx, isolated removed from chassis, draws
1.2
> >> > amp
> >> > at 20V variac "mains" and temp climbs 20 deg C in 4 minutes or so.
> >> > Secondaries measure l27V, 16.3V and 2V so that side presumably ok.
> >> > DC of primaries measure 1.2R and 2.2R, would they use 2 bifilar
primary
> >> > windings where stressed midpoint would show half way short and half
> >> > measured
> >> > ohms?. I will poke around in the winding/ try delaminating out of
> >> > curiosity
> >> > but
> >> > stock fault/ batch fault ? Other than "marinating" in paint stripper
,
> > any
> >> > tips on delaminating ?
> >> > Are replacements available from Marshall ? or a grey market source UK
?
> > or
> >> > anyone use 2 or 3 separate Tx ? Googling Tx model
> >> > Dagnall, TXMA 00061, D2105
> >> > only shows up suspiciously low priced dollar quotes
> >> >
> >> >
> >>
> >> We get parts direct from Marshall. Used to be a Marshall dealer, but we
> > are
> >> not any more, and they still supply us with parts ok, so it must not be
a
> >> requirement. It may be that you have to be a 'legitimate' business
> >> though,
> >> and not just 'Joe Punter'.
> >>
> >> Arfa
> >>
> >
> >
> > Any ball-park idea of cost for a Marshall replacement ?
> >
> >
>
>
>
> Ball park between �20 and �30 inc P&P and VAT.
>
>
>

Did you leave out some zeros? 200 to 300 GBP
eg
http://www.sowter.co.uk/acatalog/SOWTER_TRANSFORMERS_CLASSIC_AMPS_15.html

== 2 of 6 ==
Date: Fri, Mar 11 2011 2:04 am
From: "Gareth Magennis"

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:ilcnm8$t7n$1@news.eternal-september.org...
> seconf attempt
>
> Gareth Magennis <sound.service@btconnect.com> wrote in message
> news:2edep.106250$ts7.49007@newsfe14.ams2...
>>
>>
>> "N_Cook" <diverse@tcp.co.uk> wrote in message
>> news:ilas70$gc9$1@news.eternal-september.org...
>> > Arfa Daily <arfa.daily@ntlworld.com> wrote in message
>> > news:rZ5ep.75494$To7.65089@newsfe12.ams2...
>> >>
>> >>
>> >> "N_Cook" <diverse@tcp.co.uk> wrote in message
>> >> news:ilan3u$j8g$1@news.eternal-september.org...
>> >> > Blown primary of the mains Tx, isolated removed from chassis, draws
> 1.2
>> >> > amp
>> >> > at 20V variac "mains" and temp climbs 20 deg C in 4 minutes or so.
>> >> > Secondaries measure l27V, 16.3V and 2V so that side presumably ok.
>> >> > DC of primaries measure 1.2R and 2.2R, would they use 2 bifilar
> primary
>> >> > windings where stressed midpoint would show half way short and half
>> >> > measured
>> >> > ohms?. I will poke around in the winding/ try delaminating out of
>> >> > curiosity
>> >> > but
>> >> > stock fault/ batch fault ? Other than "marinating" in paint stripper
> ,
>> > any
>> >> > tips on delaminating ?
>> >> > Are replacements available from Marshall ? or a grey market source
>> >> > UK
> ?
>> > or
>> >> > anyone use 2 or 3 separate Tx ? Googling Tx model
>> >> > Dagnall, TXMA 00061, D2105
>> >> > only shows up suspiciously low priced dollar quotes
>> >> >
>> >> >
>> >>
>> >> We get parts direct from Marshall. Used to be a Marshall dealer, but
>> >> we
>> > are
>> >> not any more, and they still supply us with parts ok, so it must not
>> >> be
> a
>> >> requirement. It may be that you have to be a 'legitimate' business
>> >> though,
>> >> and not just 'Joe Punter'.
>> >>
>> >> Arfa
>> >>
>> >
>> >
>> > Any ball-park idea of cost for a Marshall replacement ?
>> >
>> >
>>
>>
>>
>> Ball park between �20 and �30 inc P&P and VAT.
>>
>>
>>
>
>
> Did you leave out some zeros? 200 to 300 GBP
> eg
> http://www.sowter.co.uk/acatalog/SOWTER_TRANSFORMERS_CLASSIC_AMPS_15.html
>
>
>
>

No, I've bought quite a few Marshall transformers from Marshall, and they
are not expensive.

== 3 of 6 ==
Date: Fri, Mar 11 2011 2:07 am
From: "Arfa Daily"

I wouldn't have thought so. I would have said that Gareth's estimate was
probably not far short of the mark, based on transformers that we've ordered
from them in the past. I've always found them pretty reasonable. Just give
them a call and ask. They're a friendly enough 'family' company. Jim
Marshall's daughter did run spares. As far as I know, she still does.

Arfa

== 4 of 6 ==
Date: Fri, Mar 11 2011 2:41 am
From: "Phil Allison"

"Nutcase Kook"
>
>> > Any ball-park idea of cost for a Marshall replacement ?
>
>> Ball park between �20 and �30 inc P&P and VAT.
>>
>
> Did you leave out some zeros? 200 to 300 GBP

** The Dagnall brand trannies that are fitted to modern Marshalls are all
made in India or Shi Lanka by starving children.

The design is way under sized for the job and quality is non existent.

Spares are cheap, IME.

Shame the fucking amps are not.

..... Phil

== 5 of 6 ==
Date: Fri, Mar 11 2011 6:31 am
From: "Gareth Magennis"

"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:vvmep.61518$BQ7.34172@newsfe22.ams2...
>
>
> "N_Cook" <diverse@tcp.co.uk> wrote in message
> news:ilcnm8$t7n$1@news.eternal-september.org...
>> seconf attempt
>>
>> Gareth Magennis <sound.service@btconnect.com> wrote in message
>> news:2edep.106250$ts7.49007@newsfe14.ams2...
>>>
>>>
>>> "N_Cook" <diverse@tcp.co.uk> wrote in message
>>> news:ilas70$gc9$1@news.eternal-september.org...
>>> > Arfa Daily <arfa.daily@ntlworld.com> wrote in message
>>> > news:rZ5ep.75494$To7.65089@newsfe12.ams2...
>>> >>
>>> >>
>>> >> "N_Cook" <diverse@tcp.co.uk> wrote in message
>>> >> news:ilan3u$j8g$1@news.eternal-september.org...
>>> >> > Blown primary of the mains Tx, isolated removed from chassis, draws
>> 1.2
>>> >> > amp
>>> >> > at 20V variac "mains" and temp climbs 20 deg C in 4 minutes or so.
>>> >> > Secondaries measure l27V, 16.3V and 2V so that side presumably ok.
>>> >> > DC of primaries measure 1.2R and 2.2R, would they use 2 bifilar
>> primary
>>> >> > windings where stressed midpoint would show half way short and half
>>> >> > measured
>>> >> > ohms?. I will poke around in the winding/ try delaminating out of
>>> >> > curiosity
>>> >> > but
>>> >> > stock fault/ batch fault ? Other than "marinating" in paint
>>> >> > stripper
>> ,
>>> > any
>>> >> > tips on delaminating ?
>>> >> > Are replacements available from Marshall ? or a grey market source
>>> >> > UK
>> ?
>>> > or
>>> >> > anyone use 2 or 3 separate Tx ? Googling Tx model
>>> >> > Dagnall, TXMA 00061, D2105
>>> >> > only shows up suspiciously low priced dollar quotes
>>> >> >
>>> >> >
>>> >>
>>> >> We get parts direct from Marshall. Used to be a Marshall dealer, but
>>> >> we
>>> > are
>>> >> not any more, and they still supply us with parts ok, so it must not
>>> >> be
>> a
>>> >> requirement. It may be that you have to be a 'legitimate' business
>>> >> though,
>>> >> and not just 'Joe Punter'.
>>> >>
>>> >> Arfa
>>> >>
>>> >
>>> >
>>> > Any ball-park idea of cost for a Marshall replacement ?
>>> >
>>> >
>>>
>>>
>>>
>>> Ball park between �20 and �30 inc P&P and VAT.
>>>
>>>
>>>
>>
>>
>> Did you leave out some zeros? 200 to 300 GBP
>> eg
>> http://www.sowter.co.uk/acatalog/SOWTER_TRANSFORMERS_CLASSIC_AMPS_15.html
>>
>>
>
> I wouldn't have thought so. I would have said that Gareth's estimate was
> probably not far short of the mark, based on transformers that we've
> ordered from them in the past. I've always found them pretty reasonable.
> Just give them a call and ask. They're a friendly enough 'family' company.
> Jim Marshall's daughter did run spares. As far as I know, she still does.
>
> Arfa

Is that George, Arfa?

Gareth.

== 6 of 6 ==
Date: Fri, Mar 11 2011 9:03 am
From: "Arfa Daily"

"Gareth Magennis" <sound.service@btconnect.com> wrote in message
news:Zmqep.46314$%e2.36889@newsfe13.ams2...
>
>
> "Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
> news:vvmep.61518$BQ7.34172@newsfe22.ams2...
>>
>>
>> "N_Cook" <diverse@tcp.co.uk> wrote in message
>> news:ilcnm8$t7n$1@news.eternal-september.org...
>>> seconf attempt
>>>
>>> Gareth Magennis <sound.service@btconnect.com> wrote in message
>>> news:2edep.106250$ts7.49007@newsfe14.ams2...
>>>>
>>>>
>>>> "N_Cook" <diverse@tcp.co.uk> wrote in message
>>>> news:ilas70$gc9$1@news.eternal-september.org...
>>>> > Arfa Daily <arfa.daily@ntlworld.com> wrote in message
>>>> > news:rZ5ep.75494$To7.65089@newsfe12.ams2...
>>>> >>
>>>> >>
>>>> >> "N_Cook" <diverse@tcp.co.uk> wrote in message
>>>> >> news:ilan3u$j8g$1@news.eternal-september.org...
>>>> >> > Blown primary of the mains Tx, isolated removed from chassis,
>>>> >> > draws
>>> 1.2
>>>> >> > amp
>>>> >> > at 20V variac "mains" and temp climbs 20 deg C in 4 minutes or so.
>>>> >> > Secondaries measure l27V, 16.3V and 2V so that side presumably ok.
>>>> >> > DC of primaries measure 1.2R and 2.2R, would they use 2 bifilar
>>> primary
>>>> >> > windings where stressed midpoint would show half way short and
>>>> >> > half
>>>> >> > measured
>>>> >> > ohms?. I will poke around in the winding/ try delaminating out of
>>>> >> > curiosity
>>>> >> > but
>>>> >> > stock fault/ batch fault ? Other than "marinating" in paint
>>>> >> > stripper
>>> ,
>>>> > any
>>>> >> > tips on delaminating ?
>>>> >> > Are replacements available from Marshall ? or a grey market source
>>>> >> > UK
>>> ?
>>>> > or
>>>> >> > anyone use 2 or 3 separate Tx ? Googling Tx model
>>>> >> > Dagnall, TXMA 00061, D2105
>>>> >> > only shows up suspiciously low priced dollar quotes
>>>> >> >
>>>> >> >
>>>> >>
>>>> >> We get parts direct from Marshall. Used to be a Marshall dealer, but
>>>> >> we
>>>> > are
>>>> >> not any more, and they still supply us with parts ok, so it must not
>>>> >> be
>>> a
>>>> >> requirement. It may be that you have to be a 'legitimate' business
>>>> >> though,
>>>> >> and not just 'Joe Punter'.
>>>> >>
>>>> >> Arfa
>>>> >>
>>>> >
>>>> >
>>>> > Any ball-park idea of cost for a Marshall replacement ?
>>>> >
>>>> >
>>>>
>>>>
>>>>
>>>> Ball park between �20 and �30 inc P&P and VAT.
>>>>
>>>>
>>>>
>>>
>>>
>>> Did you leave out some zeros? 200 to 300 GBP
>>> eg
>>> http://www.sowter.co.uk/acatalog/SOWTER_TRANSFORMERS_CLASSIC_AMPS_15.html
>>>
>>>
>>
>> I wouldn't have thought so. I would have said that Gareth's estimate was
>> probably not far short of the mark, based on transformers that we've
>> ordered from them in the past. I've always found them pretty reasonable.
>> Just give them a call and ask. They're a friendly enough 'family'
>> company. Jim Marshall's daughter did run spares. As far as I know, she
>> still does.
>>
>> Arfa
>
>
> Is that George, Arfa?
>
>
>
> Gareth.

Indeed it is ! :-)

They're quite close to where I live.

Arfa

==============================================================================
TOPIC: my dream, but your decision
http://groups.google.com/group/sci.electronics.repair/t/bb3a2d201b8beff1?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 2:47 am
From: marian

Hello! Convincing a Volvo driver (in my case, a girl) for having a
test-drive I was accepted into the present Volvo campaign (Romania).
Winner will be the one with highest unique views for his link. My link
is this: http://www.unlimitednaughty.ro/camera/video/concurent/Marian-Briceag
(for English turn on the captions, the cc, under arrow from the right-
bottom side of video). This battle for views ends in 16 march 2011. I
feel in my heart that Volvo has designed this car for me. From Volvo
emblem to every stitch, I found myself. Sir/ madame, my dream is in
your hands. If you just post/share it... Have a nice day!

==============================================================================
TOPIC: HOT SEXY GIRLS NUDE AND ADULT VIDEOS HERE
http://groups.google.com/group/sci.electronics.repair/t/317a534e3208cfd3?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 4:32 am
From: success all

http://love4indianpeople.blogspot.com

==============================================================================
TOPIC: Surface lights failed on GE Microwave oven JVM 1339BW02
http://groups.google.com/group/sci.electronics.repair/t/571342f72d999d0f?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 5:25 am
From: Al Thumbs

On Mar 11, 12:08 am, Franc Zabkar <fzab...@iinternode.on.net> wrote:
> On Thu, 10 Mar 2011 11:05:18 -0800 (PST), Al Thumbs
> <bcdr...@comcast.net> put finger to keyboard and composed:
>
> >Well, maybe I DO know how to get it off the wall, found some
> >instructions that indicate it slides out from a hanger. But how to fix
> >those lights?
>
> Do these exploded views help you at all?http://www.searspartsdirect.com/partsdirect/part-model/GE-Parts/Micro...
>
> - Franc Zabkar
> --
> Please remove one 'i' from my address when replying by email.

Yes, thanks.

==============================================================================
TOPIC: hai
http://groups.google.com/group/sci.electronics.repair/t/4f78e4aea8a2e7bc?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 8:52 am
From: karthik dtsi

www.helloadds.info

==============================================================================
TOPIC: What is the difference between scanning for stations and going directly
to one?
http://groups.google.com/group/sci.electronics.repair/t/5606a0580a8be0ca?hl=en
==============================================================================

== 1 of 3 ==
Date: Fri, Mar 11 2011 9:02 am
From: "Arfa Daily"

"mm" <NOPSAMmm2005@bigfoot.com> wrote in message
news:iehjn6liit2p3og8ldd8d965g6gqttd4r9@4ax.com...
> What is the difference between scanning for chhannles and going
> directly to one?
>
> I thought that letting a VCR or DVD recorder or TV scan for channels/
> stations was only to compile a list in advance of channels a device
> could receive, by checking out every station and noting which had
> signals.
>
> And that pushing 1 3 on the remote would go to channel 13 whether one
> had scanned for stations or not, whether digital station frequencies
> had changed since the last time one scanned or not. As effectively as
> if one scanned the whole spectrum, and then channeled up or down to
> get to 13.
>
> Am I right about the paragraph just above?

Well, I don't know about over there in the U.S. but here in the UK, if you
pressed "1" and "3" on the remote control, it would just cause the TV / DVDR
/ PVR to go to the thirteenth channel storage position, in which could be
stored the frequency information for any channel, anywhere in the band. So,
that could be any valid channel that you had chosen to store in that
location, or just as easily, some arbitrary channel frequency that you can't
receive at your location. Scanning for channels causes the tuner to move up
from the bottom of the band to the top, stopping each time that it finds a
channel that it can receive, and then storing the frequency information for
that channel in the next available 'slot'.

>
>
> And that for timed recording, when the dvd recorder goes to channel 13
> directly, it looks for it if necessary, just like scanning does. And
> if it gives some reception, though bad reception, even though the
> transmitter is only 10 miles away, it's not because it's off
> frequency?

I think that you are perhaps getting confused between a channel's name, and
the actual physical channel that it's broadcast on ? Even over there, I
think that VHF has long gone, hasn't it ? We have channels here called
"Channel Four" and "Channel Five", but they have never been broadcast on VHF
channels 4 and 5. They have always been up in the UHF band on various
physical channel numbers between 21 and 68, in different parts of the
country.

>
> Or are digital tuners different from analog, in that scanning first is
> essential?
>
> Thanks.

Digital is way way different from analogue. Take everything that you ever
knew about how analogue TV was transmitted, and just forget it. Digital
transmissions are 'lumped together' into blocks of frequencies called
multiplexes. Within a single multiplex, there may be many channels, and no
single one is independently identifiable, because various techniques are
used to 'mix' the data from individual stations to produce a form of spread
spectrum transmission containing encoded interleaved data. In order to
resolve this into individual stations, a channel scan has to take place
initially, and as each multiplex is found, the information about what is in
that multiplex, and how to get it out, has to be decoded and stored and used
to build the EPG that is a fundamental part of digital TV

Arfa

== 2 of 3 ==
Date: Fri, Mar 11 2011 10:03 am
From: "William Sommerwerck"

> I thought that letting a VCR or DVD recorder or TV scan for channels/
> stations was only to compile a list in advance of channels a device
> could receive, by checking out every station and noting which had
> signals.

It is.

> And that pushing 1 3 on the remote would go to channel 13 whether one
> had scanned for stations or not, whether digital station frequencies
> had changed since the last time one scanned or not. As effectively as
> if one scanned the whole spectrum, and then channeled up or down to
> get to 13.

Correct. If you select a channel that hasn't been stored in the set's
scanning memory, you'll get that channel, whether or not a signal is
present.

The "go to" is instantaneous. The set does not scan from 2 through 12 before
hitting 13. The basic principle (I assume) is the same as for any digitally
tuned receiver -- the LO is directly set to the frequency needed to receive
channel 13.

== 3 of 3 ==
Date: Fri, Mar 11 2011 11:30 am
From: dplatt@radagast.org (Dave Platt)

In article <iehjn6liit2p3og8ldd8d965g6gqttd4r9@4ax.com>,
mm <NOPSAMmm2005@bigfoot.com> wrote:
>What is the difference between scanning for chhannles and going
>directly to one?

>Or are digital tuners different from analog, in that scanning first is
>essential?

On analog tuners, the frequency is a direct function of the channel
number as seen by the user.

On ATSC digital, that is no longer true. The "channel number" seen by
the user is no longer a 1:1 function of the transmission frequency.

There are actually two channel numbers involved... the transmission-
frequency channel number (which corresponds to the old NTSC analog
channel number) and the station-identification channel number. They
may very well be different.

This architecture was put in place so that stations which were
previously down in the VHF range, could move their transmitters up to
UHF, without losing their commercially-valuable "channel number"
identity.

So, when you tell a digital TV or DVR or set-top box to do a "channel
scan", it's doing several things:

- It scans the frequencies, looking for NTSC and ATSC signals, and
"remembering" which channels are in use.

- When it sees an ATSC digital signal, it pauses briefly, decodes and
parses the signal, and "remembers" which "channel numbers" and
sub-channels are being multiplexed/transmitted on that frequency.

Subsequently, when you tell it to "tune to channel 13", it will look
ints memory. If it previously saw that "channel 13" was NTSC, it just
tunes to the traditional Channel 13 frequency slot. If, however, it
detected a "Channel 13" ID in an ATSC digital stream on *any*
frequency (even if not the traditional "channel 13" frequency) it will
tune to that frequency, start decoding, and begin extracting that
program.

--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

==============================================================================
TOPIC: the REAL problem with my Dustbuster...
http://groups.google.com/group/sci.electronics.repair/t/9894fde02c1e5899?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 9:25 am
From: "Wild_Bill"

There is no cutting action in the wirewrap process.. and the post/terminal
isn't typically deformed, the wire is.

The round wire surface is displaced by the corners of the post (conforms to
the corners), breaking thru any surface oxidation of the surfaces, and
creating the gas-tight, electrically secure mechanical connection after
several/6 wraps are completed.

--
Cheers,
WB
.............

"William Sommerwerck" <grizzledgeezer@comcast.net> wrote in message
news:ilagj4$8v9$1@news.eternal-september.org...
>
> Before someone mentions wire wrap... In wire wrapping, the wire actually
> cuts into the post, forming a gas-tight connection.
>
>

==============================================================================
TOPIC: fffcj Tiny little 'shock' and earth question .
http://groups.google.com/group/sci.electronics.repair/t/650a37ddf0d2cbb5?hl=en
==============================================================================

== 1 of 2 ==
Date: Fri, Mar 11 2011 11:41 am
From: fffcj

My Engl Fireball 60Watt amp and I are living in Spain . When I touched
the front panel , I got a very very small shock on a finger which had
recently been cut . Nothing was detectable with any of my other dry
fingers .I voltage tested between ground at the wall socket and the
amp , ac and dc . Nothing at all . Then , set on AC , I happened to
be holding one of the probes , with the other attached to the wall
point ground . 2 volts ac registered . I'm stumped . I don't appear to
be attached to anything else !
Where is this small voltage coming from ?
Do I need to worry about the earthing in this humble Spanish cottage ?
Are little 'changes' like this normal , and quite safe ?

== 2 of 2 ==
Date: Fri, Mar 11 2011 11:58 am
From: Sjouke Burry

fffcj wrote:
> My Engl Fireball 60Watt amp and I are living in Spain . When I touched
> the front panel , I got a very very small shock on a finger which had
> recently been cut . Nothing was detectable with any of my other dry
> fingers .I voltage tested between ground at the wall socket and the
> amp , ac and dc . Nothing at all . Then , set on AC , I happened to
> be holding one of the probes , with the other attached to the wall
> point ground . 2 volts ac registered . I'm stumped . I don't appear to
> be attached to anything else !
> Where is this small voltage coming from ?
> Do I need to worry about the earthing in this humble Spanish cottage ?
> Are little 'changes' like this normal , and quite safe ?

You form a capacitive divider.
There is say .2 picofarad between you and an isolated
wire carrying 240 volts.
Your capacity is about 20 picofarad, referred to ground..
that means you carry about 1/100 th of the mains voltage,
or about 2 volts.
At virtually no current.
Everything is as it should be.
This is also the reason you hear hum from the speaker, when you
touch an audio iinput.

==============================================================================
TOPIC: Samsung TV repair question.
http://groups.google.com/group/sci.electronics.repair/t/ef9b7679393102e3?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 12:13 pm
From: Meat Plow

On Thu, 10 Mar 2011 22:46:41 +0000, Geo wrote:

> On Wed, 9 Mar 2011 01:27:32 -0000, "Arfa Daily"
> <arfa.daily@ntlworld.com> wrote:
>
>
>>
>>"Christen Alex" <clamchelle69@yahoo.com.au> wrote in message
>>news:il5ud9$hct$4@speranza.aioe.org...
>>> Beezle Bub wrote:
>>>> I have an analog Samsung TV which I bought in 1998. It is around 32
>>>> inches. The problem is the image keeps getting 'squeezed'--the sides
>>>> cave in and the image takes on the shape of an hourglass. In the
>>>> past, I would have this problem for like 10 minutes but the image
>>>> would eventually correct itself. Nowadays, the problem remains as it
>>>> is. Anything can be done about this?
>>>>
>>>> Model # is TXJ2766.
>>>
>>> That's what happens when you feed HDTV into a non-HDTV TV Set. It
>>> takes about 10 minutes for the set to correct itself because frame
>>> buffers were a lot slower back in 1998.
>>
>>I have never read such pure unmitigated bloody nonsense in all my life,
>>Stick to carpentry or plumbing or baking or whatever it is you do for a
>>living ...
>>
> You can't be /serious/ - I thought it explained the problem of trying to
> squezze HD into 32 inches very well....

LOL

--
Live Fast Die Young, Leave A Pretty Corpse

==============================================================================
TOPIC: .02 mm pitch flex print PCB repair
http://groups.google.com/group/sci.electronics.repair/t/c0c9b49a40f732fa?hl=en
==============================================================================

== 1 of 2 ==
Date: Fri, Mar 11 2011 1:36 pm
From: "Michael Kennedy"

I have a Plasma tv that somehow I managed to partially tear one of the flexi
prints. I am not too sure how it happened since I was working on the PSU.

That aside, I think the PSU is fixed, but now the .02 mm pitch flexi print
is torn..

After doing lots of thinking and researching I think the way to go is using
a .02mm pitch zebra strip and connect wires from it to the connector.

Now the question is does such a zebra strip exsist?

Does anyone know where I can find such a zebra strip? Any know products I
could salvage one from??

I hope to connect wires to the zebra strip and then connect those wires to
the more reasonable sized .5mm pitch connector.

== 2 of 2 ==
Date: Fri, Mar 11 2011 2:12 pm
From: "Michael Kennedy"

"Michael Kennedy" <mikek400@crap.comcast.net> wrote in message
news:VcydncYKZ9ShC-fQnZ2dnUVZ_q6dnZ2d@giganews.com...
>I have a Plasma tv that somehow I managed to partially tear one of the
>flexi prints. I am not too sure how it happened since I was working on the
>PSU.
>
> That aside, I think the PSU is fixed, but now the .02 mm pitch flexi print
> is torn..
>
> After doing lots of thinking and researching I think the way to go is
> using a .02mm pitch zebra strip and connect wires from it to the
> connector.
>
> Now the question is does such a zebra strip exsist?
>
> Does anyone know where I can find such a zebra strip? Any know products I
> could salvage one from??
>
> I hope to connect wires to the zebra strip and then connect those wires to
> the more reasonable sized .5mm pitch connector.
>
>
>

Correction 0.2 mm pitch..

==============================================================================
TOPIC: JTAG/Boundary Scan
http://groups.google.com/group/sci.electronics.repair/t/0bd7b46a47b4c9bc?hl=en
==============================================================================

== 1 of 4 ==
Date: Fri, Mar 11 2011 2:21 pm
From: "Charles"

Has anyone ever used this method for field troubleshooting?

== 2 of 4 ==
Date: Fri, Mar 11 2011 2:52 pm
From: "Michael A. Terrell"

Charles wrote:
>
> Has anyone ever used this method for field troubleshooting?

How do you propose using the programming interface to troubleshoot
something? Are you going to write custom software and reprogram the
processor? What software and interface do you have, and is it
appropriate for the CPU involved? I programmed various embedded
controller boards for four years with JTAG, but there was no way to
troubleshoot the board from that port. Boundary scan is for testing the
CPU, not the rest of the board.

--
You can't fix stupid. You can't even put a Band-Aid� on it, because it's
Teflon coated.

== 3 of 4 ==
Date: Fri, Mar 11 2011 2:57 pm
From: "Charles"

"Michael A. Terrell" wrote in message
news:Xqednch4f4U7OufQnZ2dnUVZ_jCdnZ2d@earthlink.com...

Charles wrote:
>
> Has anyone ever used this method for field troubleshooting?

Not proposing anything. Asking a question. Not a good idea here, these
days.

== 4 of 4 ==
Date: Fri, Mar 11 2011 3:47 pm
From: dplatt@radagast.org (Dave Platt)

In article <Xqednch4f4U7OufQnZ2dnUVZ_jCdnZ2d@earthlink.com>,
Michael A. Terrell <mike.terrell@earthlink.net> wrote:

> How do you propose using the programming interface to troubleshoot
>something? Are you going to write custom software and reprogram the
>processor? What software and interface do you have, and is it
>appropriate for the CPU involved? I programmed various embedded
>controller boards for four years with JTAG, but there was no way to
>troubleshoot the board from that port. Boundary scan is for testing the
>CPU, not the rest of the board.

Hunh?

JTAG was originally designed to be a board-checkout feature! It
allows you to chain together any number of digital devices and probe
them, read their input pins, write values to their output pins, etc.

As the Great Source of Dubious Knowledge (Wikipedia) states, "It was
initially devised for testing printed circuit boards using boundary
scan and is still widely used for this application."

Its use as a method of programming the on-board (or external) flash
memory for a microcontroller is only one of its functions... a very
common one but not necessarily its most important.

With many processors, it's possible to access the on-chip debug-and-
trace engine - stop the processor, single-step it, read out the
registers or modify them, etc.

It's very much up to a board designer (and to the designers of the
chips being used) to decide how much functionality is going to be
exposed via JTAG. On some boards, accessing/programming the flash may
be all that's possible. On others, you may be able to individually
interrogate and exercise every single I/O pin on every outward-facing
chip on the whole board.

==============================================================================
TOPIC: Panasonic inverter microwave repair
http://groups.google.com/group/sci.electronics.repair/t/e81b196d6741fbf3?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 2:51 pm
From: "Trevor Wilson"

Franc Zabkar wrote:
> On Thu, 10 Mar 2011 19:38:13 +1100, "Trevor Wilson"
> <trevor@rageaudio.com.au> put finger to keyboard and composed:
>
>> I have a very nice (read: expensive) Panasonic microwave oven in for
>> service. It will actually end up being mine, when it's completed. It
>> uses a SMPS and has some nice features. The display and control
>> systems seem to work just fine. Anyway, it throws the earth leakage
>> detector switch when attempting to cook. Once of the power
>> transistors measures S/C, so my intention is to replace both
>> transistors (with OEM parts), along with the bridge rectifier (which
>> is suggested by the manufacturer). The question is this:
>>
>> If I replace the power supply parts, how likely is it that the
>> magetron is faulty and the power supply will, again, be destroyed on
>> power up?
>>
>> Should I replace the magetron on spec? I checked the terminals to
>> earth and there appears to be no leakage, but you can never tell
>> with these critters. I guess it's safe to Megger test the magnetron
>> (500 Volts)?
>>
>> I don't usually do microwave ovens, so this is new territory for me.
>>
>> TIA
>
> FWIW, I repaired a Panasonic inverter microwave oven a couple of years
> ago. After replacing the power transistors the oven worked fine.
> However, I don't recall that it tripped the ELCB beforehand. Moreover,
> I gave the oven away, so I don't know if it is still working.

**Thanks Frank. I believe I'll take the chance.

--
Trevor Wilson
www.rageaudio.com.au

==============================================================================
TOPIC: Lady Veteran has actually sent me a video of herself
http://groups.google.com/group/sci.electronics.repair/t/e5c475e0c3dc202a?hl=en
==============================================================================

== 1 of 1 ==
Date: Fri, Mar 11 2011 7:55 am
From: Michael Gross

Lady Veteran wrote:
> On Thu, 10 Mar 2011 13:21:49 -0800, HumBug! <KnewsKgnus@gmail.com>
> wrote:
>
>> On Thu, 10 Mar 2011 10:25:18 +0000, Michael Gross <pigwiggler@yahoo.com>
>> wrote:
>>
>>> She's talking shit to me so I thought I would forward it
>>>
>>> http://www.youtube.com/watch?v=rNjbXg2mBsQ
>> WRONG one, you sent yourself.
>>
>>
>>
>>
> You know how these idiots are-they don't know the difference between
> up or down.
>
> LV
>
You want to know what else Lady Veteran told me? She told me that when
she goes to a gym, she gets her workout watching the women in the locker
room.

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