sci.electronics.repair - 25 new messages in 9 topics - digest

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

sci.electronics.repair@googlegroups.com

Today's topics:

==============================================================================
TOPIC: Simple Hack To Get $2000 To Your PayPal Account.
http://groups.google.com/group/sci.electronics.repair/t/3c7aa768ae538c38?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jul 6 2010 12:20 am
From: masti dunia

Simple Hack To Get $2000 To Your PayPal Account.
At http://ukcitygirls.co.cc

Due to high security risks, i have hidden the PayPal Form link in an
image. in that website On search box Top Side, click on image
and enter your PayPal id And Your name. please don,t tell to
anyone.

==============================================================================
TOPIC: OT: a presentation on Lead-free solder
http://groups.google.com/group/sci.electronics.repair/t/527a6b18f25279a3?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jul 6 2010 2:32 am
From: "N_Cook"

Can anyone put age/years interpretation to the green/yellow/red solder-type
rankings in this publically available document?

http://teerm.nasa.gov/LFS%20Reliability/Solder%20Comparison%20by%20Component
%20Level%20Life_Use%20%20Analysis_Final.pdf

...
Unfortunately, this test data demonstrated that for some component types the
lead-free solders failed before the
SnPb control. References 1 & 2 stated that models for calculating the
actual field lifetime of lead-free solder joints
on certain component types will need to be developed due to their reduced
life capabilities relative to SnPb.

...

Vibration testing was conducted by Boeing Phantom Works (Seattle) for the
Joint Council on Aging Aircraft/Joint
Group on Pollution Prevention (JCAA/JGPP) Lead-Free Solder Project. The
JCAA/JG-PP Consortium is the first
group to test the reliability of leadfree solder joints against the
requirements of the aerospace/military community
(1,2).

Test vehicles were specially constructed circuit cards, capable of instant
detection of failure of all components.
Each test vehicle was 12.75 inches by 9 inches in size, 0.090 inches thick
and was populated with 55 components
consisting of ceramic leadless chip carriers (CLCC's), plastic leaded chip
carriers (PLCC's), TSOP's, TQFP's,
BGA's, and PDIP's. Sets of identical components were used in different
positions on the cards. The circuit cards were supported by WedgeLoks on
the two 9 inch edges. Thirty circuit cards were vibration tested.

==============================================================================
TOPIC: LG DVD-HDD LH7800 - no/intermittent video on inputs (E-E)
http://groups.google.com/group/sci.electronics.repair/t/d4fc9f00b24406a9?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jul 6 2010 2:40 am
From: b

sorrry, that model number should read 'RH 7800' not LH 7800!

==============================================================================
TOPIC: Just occasionally, it all works out ... :-)
http://groups.google.com/group/sci.electronics.repair/t/8acb2e5bc4fbe49f?hl=en
==============================================================================

== 1 of 10 ==
Date: Tues, Jul 6 2010 3:39 am
From: "Arfa Daily"

Been a right PITA day. One of those where everything you pick up is either
not worth repairing, or seems to get worse if you as much as bring a
screwdriver anywhere near it. And so it was with sinking heart that I put
the Technics SL-PG480 CD player on the bench. "Not playing discs" said the
ticket, and when I reached for a screwdriver, I needn't have bothered - the
owner had already kindly removed all the case screws, to save me the trouble
... I probably should have just sighed at this point, and sent it back
where it came from, but I've always liked these, so I thought I would just
give it 5 minutes. Everything basically did what it should, except focus
search didn't take place. That's an unusual problem on one of these, so I
thought I would just whip the deck out first and have a look at the
connectors, as someone had clearly been in there before me. There was
nothing obviously wrong, so I thought I would just check the continuity to
the laser focus coils whilst I could easily get at the connections. With an
analogue meter on a low ohms range, I checked the coils. The tracking ones
were fine, and the lens deflected left or right, but the focus ones read
open, with no lens movement.

The deck fitted to these is a Philips CDM12.1 and the lens carrier and coils
are clearly visible and accessible on the top of the laser, so I had a close
look with my powerful headband magnifier. You could clearly see that one of
the superflexible tails that connect from the fixed pins that come up from
the laser flexiprint to the focus and tracking coils on the lens carrier,
was laying detached by the side of its pin. It didn't look broken - just
never soldered or soldered properly in the first place. Pointy tweezers, a
fine tipped iron, and some fine gauge solder, soon put that right, and the
lens then deflected normally when the meter was applied again. All worked
nicely, as these always do, when it was reassembled.

Makes a change to get a decent result like that, and just goes to show that
you shouldn't just get jaded with all the crap passing across your bench,
and just not bother even attempting a repair on the basis that spares ain't
gonna be available anyway ... d;~}

Arfa

== 2 of 10 ==
Date: Tues, Jul 6 2010 4:05 am
From: "William Sommerwerck"

> Makes a change to get a decent result like that, and just
> goes to show that you shouldn't just get jaded with all the
> crap passing across your bench, and just not bother even
> attempting a repair on the basis that spares ain't gonna be
> available anyway ... d;~}

The irony is that, had spares been available, it would have taken longer to
fix the unit, and cost the customer more.

== 3 of 10 ==
Date: Tues, Jul 6 2010 4:21 am
From: "N_Cook"

Arfa Daily <arfa.daily@ntlworld.com> wrote in message
news:EJDYn.71351$wi5.62269@hurricane...
> Been a right PITA day. One of those where everything you pick up is either
> not worth repairing, or seems to get worse if you as much as bring a
> screwdriver anywhere near it. And so it was with sinking heart that I put
> the Technics SL-PG480 CD player on the bench. "Not playing discs" said the
> ticket, and when I reached for a screwdriver, I needn't have bothered -
the
> owner had already kindly removed all the case screws, to save me the
trouble
> ... I probably should have just sighed at this point, and sent it back
> where it came from, but I've always liked these, so I thought I would just
> give it 5 minutes. Everything basically did what it should, except focus
> search didn't take place. That's an unusual problem on one of these, so I
> thought I would just whip the deck out first and have a look at the
> connectors, as someone had clearly been in there before me. There was
> nothing obviously wrong, so I thought I would just check the continuity to
> the laser focus coils whilst I could easily get at the connections. With
an
> analogue meter on a low ohms range, I checked the coils. The tracking ones
> were fine, and the lens deflected left or right, but the focus ones read
> open, with no lens movement.
>
> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
coils
> are clearly visible and accessible on the top of the laser, so I had a
close
> look with my powerful headband magnifier. You could clearly see that one
of
> the superflexible tails that connect from the fixed pins that come up from
> the laser flexiprint to the focus and tracking coils on the lens carrier,
> was laying detached by the side of its pin. It didn't look broken - just
> never soldered or soldered properly in the first place. Pointy tweezers,
a
> fine tipped iron, and some fine gauge solder, soon put that right, and the
> lens then deflected normally when the meter was applied again. All worked
> nicely, as these always do, when it was reassembled.
>
> Makes a change to get a decent result like that, and just goes to show
that
> you shouldn't just get jaded with all the crap passing across your bench,
> and just not bother even attempting a repair on the basis that spares
ain't
> gonna be available anyway ... d;~}
>
> Arfa
>

My favourite was finding an insect cocoon built into the optics section of a
Philips AZ1101 and a micro-facetted (fittingly the delicate tracery looked
as though it was part of the optics) piece of insect wing precisely in-line
of the optical path from the laser to the mirror system.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

== 4 of 10 ==
Date: Tues, Jul 6 2010 4:32 am
From: "Mark Zacharias"

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:i0v3kp$n15$1@news.eternal-september.org...
> Arfa Daily <arfa.daily@ntlworld.com> wrote in message
> news:EJDYn.71351$wi5.62269@hurricane...
>> Been a right PITA day. One of those where everything you pick up is
>> either
>> not worth repairing, or seems to get worse if you as much as bring a
>> screwdriver anywhere near it. And so it was with sinking heart that I put
>> the Technics SL-PG480 CD player on the bench. "Not playing discs" said
>> the
>> ticket, and when I reached for a screwdriver, I needn't have bothered -
> the
>> owner had already kindly removed all the case screws, to save me the
> trouble
>> ... I probably should have just sighed at this point, and sent it back
>> where it came from, but I've always liked these, so I thought I would
>> just
>> give it 5 minutes. Everything basically did what it should, except focus
>> search didn't take place. That's an unusual problem on one of these, so I
>> thought I would just whip the deck out first and have a look at the
>> connectors, as someone had clearly been in there before me. There was
>> nothing obviously wrong, so I thought I would just check the continuity
>> to
>> the laser focus coils whilst I could easily get at the connections. With
> an
>> analogue meter on a low ohms range, I checked the coils. The tracking
>> ones
>> were fine, and the lens deflected left or right, but the focus ones read
>> open, with no lens movement.
>>
>> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
> coils
>> are clearly visible and accessible on the top of the laser, so I had a
> close
>> look with my powerful headband magnifier. You could clearly see that one
> of
>> the superflexible tails that connect from the fixed pins that come up
>> from
>> the laser flexiprint to the focus and tracking coils on the lens carrier,
>> was laying detached by the side of its pin. It didn't look broken - just
>> never soldered or soldered properly in the first place. Pointy tweezers,
> a
>> fine tipped iron, and some fine gauge solder, soon put that right, and
>> the
>> lens then deflected normally when the meter was applied again. All worked
>> nicely, as these always do, when it was reassembled.
>>
>> Makes a change to get a decent result like that, and just goes to show
> that
>> you shouldn't just get jaded with all the crap passing across your bench,
>> and just not bother even attempting a repair on the basis that spares
> ain't
>> gonna be available anyway ... d;~}
>>
>> Arfa
>>
>
> My favourite was finding an insect cocoon built into the optics section of
> a
> Philips AZ1101 and a micro-facetted (fittingly the delicate tracery looked
> as though it was part of the optics) piece of insect wing precisely
> in-line
> of the optical path from the laser to the mirror system.
>
> --
> Diverse Devices, Southampton, England
> electronic hints and repair briefs , schematics/manuals list on
> http://diverse.4mg.com/index.htm
>
>
>

I once found bird shit inside of a sealed relay...

Mark Z.

== 5 of 10 ==
Date: Tues, Jul 6 2010 6:21 am
From: Meat Plow

On Tue, 06 Jul 2010 06:32:17 -0500, Mark Zacharias ǝʇoɹʍ:

> "N_Cook" <diverse@tcp.co.uk> wrote in message
> news:i0v3kp$n15$1@news.eternal-september.org...
>> Arfa Daily <arfa.daily@ntlworld.com> wrote in message
>> news:EJDYn.71351$wi5.62269@hurricane...
>>> Been a right PITA day. One of those where everything you pick up is
>>> either
>>> not worth repairing, or seems to get worse if you as much as bring a
>>> screwdriver anywhere near it. And so it was with sinking heart that I
>>> put the Technics SL-PG480 CD player on the bench. "Not playing discs"
>>> said the
>>> ticket, and when I reached for a screwdriver, I needn't have bothered
>>> -
>> the
>>> owner had already kindly removed all the case screws, to save me the
>> trouble
>>> ... I probably should have just sighed at this point, and sent it
>>> back where it came from, but I've always liked these, so I thought I
>>> would just
>>> give it 5 minutes. Everything basically did what it should, except
>>> focus search didn't take place. That's an unusual problem on one of
>>> these, so I thought I would just whip the deck out first and have a
>>> look at the connectors, as someone had clearly been in there before
>>> me. There was nothing obviously wrong, so I thought I would just check
>>> the continuity to
>>> the laser focus coils whilst I could easily get at the connections.
>>> With
>> an
>>> analogue meter on a low ohms range, I checked the coils. The tracking
>>> ones
>>> were fine, and the lens deflected left or right, but the focus ones
>>> read open, with no lens movement.
>>>
>>> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
>> coils
>>> are clearly visible and accessible on the top of the laser, so I had a
>> close
>>> look with my powerful headband magnifier. You could clearly see that
>>> one
>> of
>>> the superflexible tails that connect from the fixed pins that come up
>>> from
>>> the laser flexiprint to the focus and tracking coils on the lens
>>> carrier, was laying detached by the side of its pin. It didn't look
>>> broken - just never soldered or soldered properly in the first place.
>>> Pointy tweezers,
>> a
>>> fine tipped iron, and some fine gauge solder, soon put that right, and
>>> the
>>> lens then deflected normally when the meter was applied again. All
>>> worked nicely, as these always do, when it was reassembled.
>>>
>>> Makes a change to get a decent result like that, and just goes to show
>> that
>>> you shouldn't just get jaded with all the crap passing across your
>>> bench, and just not bother even attempting a repair on the basis that
>>> spares
>> ain't
>>> gonna be available anyway ... d;~}
>>>
>>> Arfa
>>>
>>>
>> My favourite was finding an insect cocoon built into the optics section
>> of a
>> Philips AZ1101 and a micro-facetted (fittingly the delicate tracery
>> looked as though it was part of the optics) piece of insect wing
>> precisely in-line
>> of the optical path from the laser to the mirror system.
>>
>> --
>> Diverse Devices, Southampton, England electronic hints and repair
>> briefs , schematics/manuals list on http://diverse.4mg.com/index.htm
>>
>>
>>
>>
>
> I once found bird shit inside of a sealed relay...
>
> Mark Z.

I once found a live rodent inside an old RCA radio/turntable console.

== 6 of 10 ==
Date: Tues, Jul 6 2010 6:47 am
From: Ron

On 06/07/2010 14:21, Meat Plow wrote:
> On Tue, 06 Jul 2010 06:32:17 -0500, Mark Zacharias ǝʇoɹʍ:
>
>> "N_Cook"<diverse@tcp.co.uk> wrote in message
>> news:i0v3kp$n15$1@news.eternal-september.org...
>>> Arfa Daily<arfa.daily@ntlworld.com> wrote in message
>>> news:EJDYn.71351$wi5.62269@hurricane...
>>>> Been a right PITA day. One of those where everything you pick up is
>>>> either
>>>> not worth repairing, or seems to get worse if you as much as bring a
>>>> screwdriver anywhere near it. And so it was with sinking heart that I
>>>> put the Technics SL-PG480 CD player on the bench. "Not playing discs"
>>>> said the
>>>> ticket, and when I reached for a screwdriver, I needn't have bothered
>>>> -
>>> the
>>>> owner had already kindly removed all the case screws, to save me the
>>> trouble
>>>> ... I probably should have just sighed at this point, and sent it
>>>> back where it came from, but I've always liked these, so I thought I
>>>> would just
>>>> give it 5 minutes. Everything basically did what it should, except
>>>> focus search didn't take place. That's an unusual problem on one of
>>>> these, so I thought I would just whip the deck out first and have a
>>>> look at the connectors, as someone had clearly been in there before
>>>> me. There was nothing obviously wrong, so I thought I would just check
>>>> the continuity to
>>>> the laser focus coils whilst I could easily get at the connections.
>>>> With
>>> an
>>>> analogue meter on a low ohms range, I checked the coils. The tracking
>>>> ones
>>>> were fine, and the lens deflected left or right, but the focus ones
>>>> read open, with no lens movement.
>>>>
>>>> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
>>> coils
>>>> are clearly visible and accessible on the top of the laser, so I had a
>>> close
>>>> look with my powerful headband magnifier. You could clearly see that
>>>> one
>>> of
>>>> the superflexible tails that connect from the fixed pins that come up
>>>> from
>>>> the laser flexiprint to the focus and tracking coils on the lens
>>>> carrier, was laying detached by the side of its pin. It didn't look
>>>> broken - just never soldered or soldered properly in the first place.
>>>> Pointy tweezers,
>>> a
>>>> fine tipped iron, and some fine gauge solder, soon put that right, and
>>>> the
>>>> lens then deflected normally when the meter was applied again. All
>>>> worked nicely, as these always do, when it was reassembled.
>>>>
>>>> Makes a change to get a decent result like that, and just goes to show
>>> that
>>>> you shouldn't just get jaded with all the crap passing across your
>>>> bench, and just not bother even attempting a repair on the basis that
>>>> spares
>>> ain't
>>>> gonna be available anyway ... d;~}
>>>>
>>>> Arfa
>>>>
>>>>
>>> My favourite was finding an insect cocoon built into the optics section
>>> of a
>>> Philips AZ1101 and a micro-facetted (fittingly the delicate tracery
>>> looked as though it was part of the optics) piece of insect wing
>>> precisely in-line
>>> of the optical path from the laser to the mirror system.
>>>
>>> --
>>> Diverse Devices, Southampton, England electronic hints and repair
>>> briefs , schematics/manuals list on http://diverse.4mg.com/index.htm
>>>
>>>
>>>
>>>
>>
>> I once found bird shit inside of a sealed relay...
>>
>> Mark Z.
>
> I once found a live rodent inside an old RCA radio/turntable console.

On more than on occasion I found dead and desicated mice inside
microwave ovens with no apparent means of entry (or escape) I can only
assume they were manufactured in.

Ron(UK)

== 7 of 10 ==
Date: Tues, Jul 6 2010 9:48 am
From: "hr(bob) hofmann@att.net"

On Jul 6, 8:47 am, Ron <r...@lunevalleyaudio.com> wrote:
> On 06/07/2010 14:21, Meat Plow wrote:
>
>
>
>
>
> > On Tue, 06 Jul 2010 06:32:17 -0500, Mark Zacharias ǝʇoɹʍ:
>
> >> "N_Cook"<dive...@tcp.co.uk> wrote in message
> >>news:i0v3kp$n15$1@news.eternal-september.org...
> >>> Arfa Daily<arfa.da...@ntlworld.com> wrote in message
> >>>news:EJDYn.71351$wi5.62269@hurricane...
> >>>> Been a right PITA day. One of those where everything you pick up is
> >>>> either
> >>>> not worth repairing, or seems to get worse if you as much as bring a
> >>>> screwdriver anywhere near it. And so it was with sinking heart that I
> >>>> put the Technics SL-PG480 CD player on the bench. "Not playing discs"
> >>>> said the
> >>>> ticket, and when I reached for a screwdriver, I needn't have bothered
> >>>> -
> >>> the
> >>>> owner had already kindly removed all the case screws, to save me the
> >>> trouble
> >>>> ... I probably should have just sighed at this point, and sent it
> >>>> back where it came from, but I've always liked these, so I thought I
> >>>> would just
> >>>> give it 5 minutes. Everything basically did what it should, except
> >>>> focus search didn't take place. That's an unusual problem on one of
> >>>> these, so I thought I would just whip the deck out first and have a
> >>>> look at the connectors, as someone had clearly been in there before
> >>>> me. There was nothing obviously wrong, so I thought I would just check
> >>>> the continuity to
> >>>> the laser focus coils whilst I could easily get at the connections.
> >>>> With
> >>> an
> >>>> analogue meter on a low ohms range, I checked the coils. The tracking
> >>>> ones
> >>>> were fine, and the lens deflected left or right, but the focus ones
> >>>> read open, with no lens movement.
>
> >>>> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
> >>> coils
> >>>> are clearly visible and accessible on the top of the laser, so I had a
> >>> close
> >>>> look with my powerful headband magnifier. You could clearly see that
> >>>> one
> >>> of
> >>>> the superflexible tails that connect from the fixed pins that come up
> >>>> from
> >>>> the laser flexiprint to the focus and tracking coils on the lens
> >>>> carrier, was laying detached by the side of its pin. It didn't look
> >>>> broken - just never soldered or soldered properly in the first place.
> >>>> Pointy tweezers,
> >>> a
> >>>> fine tipped iron, and some fine gauge solder, soon put that right, and
> >>>> the
> >>>> lens then deflected normally when the meter was applied again. All
> >>>> worked nicely, as these always do, when it was reassembled.
>
> >>>> Makes a change to get a decent result like that, and just goes to show
> >>> that
> >>>> you shouldn't just get jaded with all the crap passing across your
> >>>> bench, and just not bother even attempting a repair on the basis that
> >>>> spares
> >>> ain't
> >>>> gonna be available anyway ... d;~}
>
> >>>> Arfa
>
> >>> My favourite was finding an insect cocoon built into the optics section
> >>> of a
> >>> Philips AZ1101 and a micro-facetted (fittingly the delicate tracery
> >>> looked as though it was part of the optics) piece of insect wing
> >>> precisely in-line
> >>> of the optical path from the laser to the mirror system.
>
> >>> --
> >>> Diverse Devices, Southampton, England electronic hints and repair
> >>> briefs , schematics/manuals list onhttp://diverse.4mg.com/index.htm
>
> >> I once found bird shit inside of a sealed relay...
>
> >> Mark Z.
>
> > I once found a live rodent inside an old RCA radio/turntable console.
>
> On more than on occasion I found dead and desicated mice inside
> microwave ovens with no apparent means of entry (or escape) I can only
> assume they were manufactured in.
>
> Ron(UK)- Hide quoted text -
>
> - Show quoted text -

Inside the overall case, or actually inside the "oven"?

== 8 of 10 ==
Date: Tues, Jul 6 2010 9:51 am
From: Ron

On 06/07/2010 17:48, hr(bob) hofmann@att.net wrote:
> On Jul 6, 8:47 am, Ron<r...@lunevalleyaudio.com> wrote:
>> On 06/07/2010 14:21, Meat Plow wrote:
>>
>>
>>
>>
>>
>>> On Tue, 06 Jul 2010 06:32:17 -0500, Mark Zacharias ǝʇoɹʍ:
>>
>>>> "N_Cook"<dive...@tcp.co.uk> wrote in message
>>>> news:i0v3kp$n15$1@news.eternal-september.org...
>>>>> Arfa Daily<arfa.da...@ntlworld.com> wrote in message
>>>>> news:EJDYn.71351$wi5.62269@hurricane...
>>>>>> Been a right PITA day. One of those where everything you pick up is
>>>>>> either
>>>>>> not worth repairing, or seems to get worse if you as much as bring a
>>>>>> screwdriver anywhere near it. And so it was with sinking heart that I
>>>>>> put the Technics SL-PG480 CD player on the bench. "Not playing discs"
>>>>>> said the
>>>>>> ticket, and when I reached for a screwdriver, I needn't have bothered
>>>>>> -
>>>>> the
>>>>>> owner had already kindly removed all the case screws, to save me the
>>>>> trouble
>>>>>> ... I probably should have just sighed at this point, and sent it
>>>>>> back where it came from, but I've always liked these, so I thought I
>>>>>> would just
>>>>>> give it 5 minutes. Everything basically did what it should, except
>>>>>> focus search didn't take place. That's an unusual problem on one of
>>>>>> these, so I thought I would just whip the deck out first and have a
>>>>>> look at the connectors, as someone had clearly been in there before
>>>>>> me. There was nothing obviously wrong, so I thought I would just check
>>>>>> the continuity to
>>>>>> the laser focus coils whilst I could easily get at the connections.
>>>>>> With
>>>>> an
>>>>>> analogue meter on a low ohms range, I checked the coils. The tracking
>>>>>> ones
>>>>>> were fine, and the lens deflected left or right, but the focus ones
>>>>>> read open, with no lens movement.
>>
>>>>>> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
>>>>> coils
>>>>>> are clearly visible and accessible on the top of the laser, so I had a
>>>>> close
>>>>>> look with my powerful headband magnifier. You could clearly see that
>>>>>> one
>>>>> of
>>>>>> the superflexible tails that connect from the fixed pins that come up
>>>>>> from
>>>>>> the laser flexiprint to the focus and tracking coils on the lens
>>>>>> carrier, was laying detached by the side of its pin. It didn't look
>>>>>> broken - just never soldered or soldered properly in the first place.
>>>>>> Pointy tweezers,
>>>>> a
>>>>>> fine tipped iron, and some fine gauge solder, soon put that right, and
>>>>>> the
>>>>>> lens then deflected normally when the meter was applied again. All
>>>>>> worked nicely, as these always do, when it was reassembled.
>>
>>>>>> Makes a change to get a decent result like that, and just goes to show
>>>>> that
>>>>>> you shouldn't just get jaded with all the crap passing across your
>>>>>> bench, and just not bother even attempting a repair on the basis that
>>>>>> spares
>>>>> ain't
>>>>>> gonna be available anyway ... d;~}
>>
>>>>>> Arfa
>>
>>>>> My favourite was finding an insect cocoon built into the optics section
>>>>> of a
>>>>> Philips AZ1101 and a micro-facetted (fittingly the delicate tracery
>>>>> looked as though it was part of the optics) piece of insect wing
>>>>> precisely in-line
>>>>> of the optical path from the laser to the mirror system.
>>
>>>>> --
>>>>> Diverse Devices, Southampton, England electronic hints and repair
>>>>> briefs , schematics/manuals list onhttp://diverse.4mg.com/index.htm
>>
>>>> I once found bird shit inside of a sealed relay...
>>
>>>> Mark Z.
>>
>>> I once found a live rodent inside an old RCA radio/turntable console.
>>
>> On more than on occasion I found dead and desicated mice inside
>> microwave ovens with no apparent means of entry (or escape) I can only
>> assume they were manufactured in.
>>
>> Ron(UK)- Hide quoted text -
>>
>> - Show quoted text -
>
> Inside the overall case, or actually inside the "oven"?

In the cabinet, among the high voltages. It was quite common to find
assorted dead insects in there, often ones not native to the UK.

Ron

== 9 of 10 ==
Date: Tues, Jul 6 2010 11:35 am
From: klem kedidelhopper

On Jul 6, 12:51 pm, Ron <r...@lunevalleyaudio.com> wrote:
> On 06/07/2010 17:48, hr(bob) hofm...@att.net wrote:
>
>
>
>
>
> > On Jul 6, 8:47 am, Ron<r...@lunevalleyaudio.com> wrote:
> >> On 06/07/2010 14:21, Meat Plow wrote:
>
> >>> On Tue, 06 Jul 2010 06:32:17 -0500, Mark Zacharias ǝʇoɹʍ:
>
> >>>> "N_Cook"<dive...@tcp.co.uk> wrote in message
> >>>>news:i0v3kp$n15$1@news.eternal-september.org...
> >>>>> Arfa Daily<arfa.da...@ntlworld.com> wrote in message
> >>>>>news:EJDYn.71351$wi5.62269@hurricane...
> >>>>>> Been a right PITA day. One of those where everything you pick up is
> >>>>>> either
> >>>>>> not worth repairing, or seems to get worse if you as much as bring a
> >>>>>> screwdriver anywhere near it. And so it was with sinking heart that I
> >>>>>> put the Technics SL-PG480 CD player on the bench. "Not playing discs"
> >>>>>> said the
> >>>>>> ticket, and when I reached for a screwdriver, I needn't have bothered
> >>>>>> -
> >>>>> the
> >>>>>> owner had already kindly removed all the case screws, to save me the
> >>>>> trouble
> >>>>>> ... I probably should have just sighed at this point, and sent it
> >>>>>> back where it came from, but I've always liked these, so I thought I
> >>>>>> would just
> >>>>>> give it 5 minutes. Everything basically did what it should, except
> >>>>>> focus search didn't take place. That's an unusual problem on one of
> >>>>>> these, so I thought I would just whip the deck out first and have a
> >>>>>> look at the connectors, as someone had clearly been in there before
> >>>>>> me. There was nothing obviously wrong, so I thought I would just check
> >>>>>> the continuity to
> >>>>>> the laser focus coils whilst I could easily get at the connections.
> >>>>>> With
> >>>>> an
> >>>>>> analogue meter on a low ohms range, I checked the coils. The tracking
> >>>>>> ones
> >>>>>> were fine, and the lens deflected left or right, but the focus ones
> >>>>>> read open, with no lens movement.
>
> >>>>>> The deck fitted to these is a Philips CDM12.1 and the lens carrier and
> >>>>> coils
> >>>>>> are clearly visible and accessible on the top of the laser, so I had a
> >>>>> close
> >>>>>> look with my powerful headband magnifier. You could clearly see that
> >>>>>> one
> >>>>> of
> >>>>>> the superflexible tails that connect from the fixed pins that come up
> >>>>>> from
> >>>>>> the laser flexiprint to the focus and tracking coils on the lens
> >>>>>> carrier, was laying detached by the side of its pin. It didn't look
> >>>>>> broken - just never soldered or soldered properly in the first place.
> >>>>>> Pointy tweezers,
> >>>>> a
> >>>>>> fine tipped iron, and some fine gauge solder, soon put that right, and
> >>>>>> the
> >>>>>> lens then deflected normally when the meter was applied again. All
> >>>>>> worked nicely, as these always do, when it was reassembled.
>
> >>>>>> Makes a change to get a decent result like that, and just goes to show
> >>>>> that
> >>>>>> you shouldn't just get jaded with all the crap passing across your
> >>>>>> bench, and just not bother even attempting a repair on the basis that
> >>>>>> spares
> >>>>> ain't
> >>>>>> gonna be available anyway ... d;~}
>
> >>>>>> Arfa
>
> >>>>> My favourite was finding an insect cocoon built into the optics section
> >>>>> of a
> >>>>> Philips AZ1101 and a micro-facetted (fittingly the delicate tracery
> >>>>> looked as though it was part of the optics) piece of insect wing
> >>>>> precisely in-line
> >>>>> of the optical path from the laser to the mirror system.
>
> >>>>> --
> >>>>> Diverse Devices, Southampton, England electronic hints and repair
> >>>>> briefs , schematics/manuals list onhttp://diverse.4mg.com/index.htm
>
> >>>> I once found bird shit inside of a sealed relay...
>
> >>>> Mark Z.
>
> >>> I once found a live rodent inside an old RCA radio/turntable console.
>
> >> On more than on occasion I found dead and desicated mice inside
> >> microwave ovens with no apparent means of entry (or escape) I can only
> >> assume they were manufactured in.
>
> >> Ron(UK)- Hide quoted text -
>
> >> - Show quoted text -
>
> > Inside the overall case, or actually inside the "oven"?
>
> In the cabinet, among the high voltages. It was quite common to find
> assorted dead insects in there, often ones not native to the UK.
>
> Ron- Hide quoted text -
>
> - Show quoted text -

My all time favorite was the peanut butter and bannana sandwich that
someone left in a VCR. (Problem: the tape wouldn't load)....I always
appreciated the snack. Lenny

== 10 of 10 ==
Date: Tues, Jul 6 2010 12:22 pm
From: David Nebenzahl

On 7/6/2010 11:35 AM klem kedidelhopper spake thus:

[note message TRIMMING]

> My all time favorite was the peanut butter and bannana sandwich that
> someone left in a VCR. (Problem: the tape wouldn't load)....I always
> appreciated the snack. Lenny

I guess that's going way beyond the concept of the "cup holder" to a
"sandwich storage compartment", eh?

--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

==============================================================================
TOPIC: Digifusion FVRT90 freeview PVR (repaired).
http://groups.google.com/group/sci.electronics.repair/t/4023668ac802b819?hl=en
==============================================================================

== 1 of 2 ==
Date: Tues, Jul 6 2010 6:21 am
From: "ian field"

Just in case anyone else is having problems with one of these, I've just
fixed mine by doing a full PSU recap.

Yesterday when I went to use it, it switched on and immediately froze.
Unplugging for 30s and plugging back in - the 7-seg display ran through the
Klingon alphabet and then went blank.

All but 3 of the electrolytics looked cheap & nasty but read lower ESR than
I was expecting - but evidently not low enough for the PSU to work
correctly.

One of the electrolytics on the primary side is the error voltage smoother,
its very important that this is in good condition - as its only 1uF it
wasn't difficult to find a non-electrolytic replacement.

The 3 electrolytics directly on the cathodes of the 3 rectifiers were decent
quality with low ESR (I couldn't find any replacements with lower) I added
10uF multilayer ceramic chip capacitors on the print side.

== 2 of 2 ==
Date: Tues, Jul 6 2010 7:10 am
From: Meat Plow

On Tue, 06 Jul 2010 14:21:44 +0100, ian field ǝʇoɹʍ:

> Just in case anyone else is having problems with one of these, I've just
> fixed mine by doing a full PSU recap.
>
> Yesterday when I went to use it, it switched on and immediately froze.
> Unplugging for 30s and plugging back in - the 7-seg display ran through
> the Klingon alphabet and then went blank.
>
> All but 3 of the electrolytics looked cheap & nasty but read lower ESR
> than I was expecting - but evidently not low enough for the PSU to work
> correctly.
>
> One of the electrolytics on the primary side is the error voltage
> smoother, its very important that this is in good condition - as its
> only 1uF it wasn't difficult to find a non-electrolytic replacement.
>
> The 3 electrolytics directly on the cathodes of the 3 rectifiers were
> decent quality with low ESR (I couldn't find any replacements with
> lower) I added 10uF multilayer ceramic chip capacitors on the print
> side.

I shot-gunned a PC Coolmax PSU, 650 watts. Just up and quit one day.
Could here a little snap has I plugged the 3 pin mains plug indicating
a current inrush on that side of the PSU. But replacing several caps
with new ones rated at 65c brought it back to life.

Next project is an Intel 915 mainboard that gave up after a year of use.
It had been used to begin with. It was in my son's PC and his PC just
froze. After that, no boot, no POST. I read somewhere that Intel was
notorious for using caps that lacked stability over time especially when
placed near heat sources. The new motherboards like the Asus MT4 series
advertise solid polymer caps that last 57 years at 65c. We'll see about
that :)

==============================================================================
TOPIC: Polaroid TLX-04011C vertical stripe
http://groups.google.com/group/sci.electronics.repair/t/4c8b4302f2fee97b?hl=en
==============================================================================

== 1 of 2 ==
Date: Tues, Jul 6 2010 7:12 am
From: klem kedidelhopper

This set has a dim vertical bar about 4 inches wide just to the right
of center screen. There is a normal full color picture otherwise but
this "bar" is a bit dimmer than the rest of the screen, and so its
noticible. The strange thing is though depending upon the scene
sometimes you don't notice it at all and at other times it seems quite
prominent. At times you can notice smears of red going through this
area as well. The customer says he did a search on this thing and
seems to think it needs a "capacitor". But then sometimes they tell me
its the switch when it won't turn on too. I looked but found nothing
that really seems to pertain to this problem exectly.
Does anyone have any experience with this problem on this set? Thanks,
Lenny

== 2 of 2 ==
Date: Tues, Jul 6 2010 11:28 am
From: PlainBill47@yahoo.com

On Tue, 6 Jul 2010 07:12:43 -0700 (PDT), klem kedidelhopper
<captainvideo462009@gmail.com> wrote:

>This set has a dim vertical bar about 4 inches wide just to the right
>of center screen. There is a normal full color picture otherwise but
>this "bar" is a bit dimmer than the rest of the screen, and so its
>noticible. The strange thing is though depending upon the scene
>sometimes you don't notice it at all and at other times it seems quite
>prominent. At times you can notice smears of red going through this
>area as well. The customer says he did a search on this thing and
>seems to think it needs a "capacitor". But then sometimes they tell me
>its the switch when it won't turn on too. I looked but found nothing
>that really seems to pertain to this problem exectly.
>Does anyone have any experience with this problem on this set? Thanks,
>Lenny
Is this a sharply deliniated bar, indicating a problem with columns of
pixels, or do the edges gradually merge into the 'good' area.
A sharp edged column would indicate a problem either with a column
driver in the LCD panel itself (not repairable), or the t-con board
(usually replaceable).

A dimmer column with no sharp edges could indicate a backlight
problem.

As far as the customer's suggestion, while it is unlikely, this
wouldn't be the first time some very strange symptoms resulted from a
marginal capacitor.

PlainBill

==============================================================================
TOPIC: Rectifier wiring
http://groups.google.com/group/sci.electronics.repair/t/b087d99e9ce594b1?hl=en
==============================================================================

== 1 of 4 ==
Date: Tues, Jul 6 2010 9:58 am
From: beecrofter

A neat use for bridge rectifiers is to put in battery powered devices
so that the battery can go in either way .

== 2 of 4 ==
Date: Tues, Jul 6 2010 10:02 am
From: "William Sommerwerck"

> A neat use for bridge rectifiers is to put in battery-powered
> devices so that the battery can go in either way.

Yes... if the device can tolerate a constant voltage drop of 1.2V (or
greater).

== 3 of 4 ==
Date: Tues, Jul 6 2010 10:12 am
From: Joe Pfeiffer

beecrofter <beecrofter@yahoo.com> writes:

> A neat use for bridge rectifiers is to put in battery powered devices
> so that the battery can go in either way .

Coincidentally, comp.robotics.misc has just been having a lively thread
regarding these battery contacts that allow a battery to be inserted in
either orientation, completely through the geometry of the contacts.

http://www.pcmag.com/article2/0,2817,2365995,00.asp
--
As we enjoy great advantages from the inventions of others, we should
be glad of an opportunity to serve others by any invention of ours;
and this we should do freely and generously. (Benjamin Franklin)

== 4 of 4 ==
Date: Tues, Jul 6 2010 10:26 am
From: "William Sommerwerck"

>> A neat use for bridge rectifiers is to put in battery powered devices
>> so that the battery can go in either way .

> Coincidentally, comp.robotics.misc has just been having a lively thread
> regarding these battery contacts that allow a battery to be inserted in
> either orientation, completely through the geometry of the contacts.

> http://www.pcmag.com/article2/0,2817,2365995,00.asp

I was about to say something ironic/sarcastic, about how this has already
been done with battery shape -- but was pleased to read that this system
works with common existing cells. Great idea -- if it works.

> As we enjoy great advantages from the inventions of others, we should
> be glad of an opportunity to serve others by any invention of ours;
> and this we should do freely and generously. (Benjamin Franklin)

"Giving away" inventions is not necessarily a good thing. The patent system
actually encourages invention by increasing the likelihood an inventor will
profit from his ideas.

==============================================================================
TOPIC: IR home leak imaging
http://groups.google.com/group/sci.electronics.repair/t/a1d0ec1678a5ff3d?hl=en
==============================================================================

== 1 of 3 ==
Date: Tues, Jul 6 2010 11:55 am
From: dlzc

On Jul 5, 1:42 pm, vjp2...@at.BioStrategist.dot.dot.com wrote:
> What about a dye that is colorful when wet and white
> when dry, so it could detect leaks in wallks and even
> grout because the leak stays wet longer than the rest?

Rit dye.

David A. Smith

== 2 of 3 ==
Date: Tues, Jul 6 2010 3:01 pm
From: "HeyBub"

vjp2.at@at.BioStrategist.dot.dot.com wrote:
> I knew someone who got some used fancy oilfield devices and imaged
> houses to find leaks using not only infrared but some pretty fancy
> math to compare how the images changed as the temperature changed
> during the day to night cycle. I gotta wonder if this has advanced
> much in the decade since.
>
> I have some siding, poynting and roof leaks, whose repair would be a
> lot less costly if I could get a cheap imaging analysis.
>
>

If you want to experiment with it yourself, consider an appropriate infared
filter for your camera.

== 3 of 3 ==
Date: Tues, Jul 6 2010 3:16 pm
From: don@manx.misty.com (Don Klipstein)

In article <zeCdnaRzpscCOq7RnZ2dnUVZ_tednZ2d@earthlink.com>, HeyBub wrote:
>vjp2.at@at.BioStrategist.dot.dot.com wrote:
>> I knew someone who got some used fancy oilfield devices and imaged
>> houses to find leaks using not only infrared but some pretty fancy
>> math to compare how the images changed as the temperature changed
>> during the day to night cycle. I gotta wonder if this has advanced
>> much in the decade since.
>>
>> I have some siding, poynting and roof leaks, whose repair would be a
>> lot less costly if I could get a cheap imaging analysis.
>
>If you want to experiment with it yourself, consider an appropriate infared
>filter for your camera.

Photographic film and silicon image sensors do not respond to low
temperature thermal infrared. Usually over 99.98% of that is of
wavelengths longer than 3,000 namometers. Film that responds much past
1,000 nanometers is about as common as hairy eggs. Silicon image sensors
only go out to about 1100 nm, faintly to maybe 1300 nm.
--
- Don Klipstein (don@misty.com)

==============================================================================
TOPIC: Orange Rocker 30, combo, 2006
http://groups.google.com/group/sci.electronics.repair/t/fdf96ce609e107d9?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jul 6 2010 3:36 pm
From: "Gareth Magennis"

>
>>> The ones that were originally well made are now so old they have strange
>>> faults most techs have never seen before - while the ones made more
>>> recently have designed in faults never seen before by anyone.
>>>
>>> A few examples.
>>>
>>> 1. Recent Marshall combo amps with fibreglass PCBs that become LEAKY
>>> when hot - output valve bias goes crazy and even the phase splitter
>>> stage goes way out of DC balance in normal operation because of leakage
>>> from anode tracks to grid tracks. There is simply no fix for this
>>> problem.
>>
>>
>> Care to give me a model for that behaviour ?
>
>
> ** Yep - the JCM2000: TSL100 combo series.
>
> Easy to find many stories about the same problem on usenet and web forums.
>
>

Yes, Marshal TSL 100. Sigh. I have had two of these with faulty
PCB's. They do indeed leak, and destroy the output tubes, as the bias
goes totally crazy.
I spent hours on the first one trying to establish what the fuck was going
on, as it made no sense whatsoever.

Eventually I phoned Marshall. They know about this problem and are unable
to fix it. You need to replace the PCB with an upgraded design.

Gareth.

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

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