sci.electronics.repair@googlegroups.com

Today's topics:

* PAYPAL FORM FILL AND GET $2999 INSTANT YOUR NEW PAYPAL ACCOUNT. - 1 messages,
1 author
http://groups.google.com/group/sci.electronics.repair/t/3ab3cf7a885c15a3?hl=en
* Opened laptop battery to replace lithium ion cells (Lenovo X61 tablet PC) --
Where do I get replacement battery cells? - 3 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/b825f0a2f4a3f913?hl=en
* Sony BM-23 portable dictator problem - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/dfeddea9e88c8237?hl=en
* plasma tv PSU - 3 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/7040ce6f9b2a8504?hl=en
* <free shipping paypal payment> (http://www.cntrade09.com/) wholesale men's
shoes - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/07c7253c48acfc19?hl=en

==============================================================================
TOPIC: PAYPAL FORM FILL AND GET $2999 INSTANT YOUR NEW PAYPAL ACCOUNT.
http://groups.google.com/group/sci.electronics.repair/t/3ab3cf7a885c15a3?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Sep 16 2010 9:33 pm
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==============================================================================
TOPIC: Opened laptop battery to replace lithium ion cells (Lenovo X61 tablet
PC) -- Where do I get replacement battery cells?
http://groups.google.com/group/sci.electronics.repair/t/b825f0a2f4a3f913?hl=en
==============================================================================

== 1 of 3 ==
Date: Thurs, Sep 16 2010 9:40 pm
From: "Michael Kennedy"

"JoeSchmoe" <nospamjoeschmoe@sbcglobal.net> wrote in message
news:i6ucvp$nri$1@speranza.aioe.org...
> Have you ever opened up your laptop battery to replace the lithium ion
> cells inside (if so, I could use the help as I'm stuck).
>
> Here are the pictures of the operation on a Lenovo X61 tablet PC 8-cell
> 4500 amp-hour battery kidney-transplant operation.
>
> The outside of the IBM Lenovo X61 tablet PC battery pack has the part
> numbers:
> - FRU 42T4507
> - ASM 42T5209
>
> And the batteries themselves, seem to have numbers on them of:
> - cylinders BCM 3A6 72653
> - rectangles C 3 171353
>
> Any idea where to obtain these lithium ion replacement batteries?

Right off I am not familar with your bateries, although my guess(tm) is that
you can find them on ebay or google if you search for lithium ion cells.
Some come with tabs welded to them so you can solder them togeather eaisly
and avoid destroying the battery via heat. If they are the right size and
right chemestry they should work. The mAh rating will probably be higher on
new batteries than the originals becuase of advancements in battery
technology.

Just be careful and dont get these things too hot while soldering. They have
been known to burst into flames like a flare. I highly suggest you buy the
tabbed verison.

Mike

== 2 of 3 ==
Date: Thurs, Sep 16 2010 10:00 pm
From: FatterDumber& Happier Moe <"WheresMyCheck"@UncleSamLoves.Mee>

JoeSchmoe wrote:
> Have you ever opened up your laptop battery to replace the lithium ion
> cells inside (if so, I could use the help as I'm stuck).
>
> Here are the pictures of the operation on a Lenovo X61 tablet PC 8-cell
> 4500 amp-hour battery kidney-transplant operation.
>
> The outside of the IBM Lenovo X61 tablet PC battery pack has the part
> numbers:
> - FRU 42T4507
> - ASM 42T5209
>
> And the batteries themselves, seem to have numbers on them of:
> - cylinders BCM 3A6 72653
> - rectangles C 3 171353
>
> Any idea where to obtain these lithium ion replacement batteries?

I fix about everything I can but not laptop batteries. Those have an
internal circuit that keep the batteries from over charging and
everything matches up with the computer BIOS to charge and extend
battery life. What I do is search the web and buy a replacement battery
with a decent warranty. I doubt you can even buy the new cells for what
the entire new battery costs.
Worst case of do it yourself repair would be a fire some day when
it's charging or being used.
Here's one on e-bay for 42 bucks says it has a 3 year warranty and the
dude is a power seller with a decent track record. Free shipping
http://cgi.ebay.com/Battery-IBM-Lenovo-ThinkPad-X60T-X61T-X61-Tablet-PC-/230513777635?pt=Laptop_Batteries&hash=item35abb11be3

and a laptop fire,
http://www.metacafe.com/watch/1391458/laptop_battery_fire_laptop_computer_fire_most_watched_video/

== 3 of 3 ==
Date: Fri, Sep 17 2010 12:10 am
From: "Michael Kennedy"

"FatterDumber& Happier Moe" <"WheresMyCheck"@UncleSamLoves.Mee> wrote in
message news:4c92f5c8$0$14796$bbae4d71@news.suddenlink.net...
> JoeSchmoe wrote:
>> Have you ever opened up your laptop battery to replace the lithium ion
>> cells inside (if so, I could use the help as I'm stuck).
>>
>> Here are the pictures of the operation on a Lenovo X61 tablet PC 8-cell
>> 4500 amp-hour battery kidney-transplant operation.
>>
>> The outside of the IBM Lenovo X61 tablet PC battery pack has the part
>> numbers:
>> - FRU 42T4507
>> - ASM 42T5209
>>
>> And the batteries themselves, seem to have numbers on them of:
>> - cylinders BCM 3A6 72653
>> - rectangles C 3 171353
>>
>> Any idea where to obtain these lithium ion replacement batteries?
>
> I fix about everything I can but not laptop batteries. Those have an
> internal circuit that keep the batteries from over charging and everything
> matches up with the computer BIOS to charge and extend battery life. What
> I do is search the web and buy a replacement battery with a decent
> warranty. I doubt you can even buy the new cells for what the entire new
> battery costs.
> Worst case of do it yourself repair would be a fire some day when it's
> charging or being used.
> Here's one on e-bay for 42 bucks says it has a 3 year warranty and the
> dude is a power seller with a decent track record. Free shipping
> http://cgi.ebay.com/Battery-IBM-Lenovo-ThinkPad-X60T-X61T-X61-Tablet-PC-/230513777635?pt=Laptop_Batteries&hash=item35abb11be3
> and a laptop fire,
> http://www.metacafe.com/watch/1391458/laptop_battery_fire_laptop_computer_fire_most_watched_video/

To be quite honest I would be more afraid of cheap chinese batteries than
building on myself. Have you ever taken one of those chinese made
aftermarket batteries apart? It is scary to say the least in some of them
and amazing that it works. At least if you build it yourself you know if you
put good panasonic cells in it that shouldnt spontaneously combust. But if
you arent expirenced at soldering and electronics, I cant say I reccomend
you try this as a first soldering project.. As stated by "Mr.Fatter" they
can catch on fire if not properly taken care of.. The biggest issue is when
soldering is not to heat the battery. Get ones with tabs attached to them.

==============================================================================
TOPIC: Sony BM-23 portable dictator problem
http://groups.google.com/group/sci.electronics.repair/t/dfeddea9e88c8237?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Sep 16 2010 10:04 pm
From: "jbclem"

More on my Sony BM-23...I've just noticed that the cassette compartment lid
is not quite as flush as it could be when closed. If I hold it closed
tight, the tape counter will work and the tape will PLAY. I held it for a
few minutes and a tape kept playing until I loosened my grip. So that puts
a different spin on this problem. The top front (with the dictator standing
up) part of the lid is where there seems to be some looseness. With the lid
closed I can still push that edge down a small amount.

Is there a sensor switch, on that Top Front side, that has to be pushed in a
certain amount before the dictator will work? Also, there is a small screw
missing on the one side where the lid bracket connects to the lid, one or
four screws. Where would I go to buy such a small small screw?

John

"jbclem" <jbclem1@charter.net> wrote in message
news:i6uqgb$h3r$1@news.eternal-september.org...
> My BM-23 will PLAY a tape for a few seconds then stop. As it stops there
is
> a high pitched signal that will continue until I put it on STOP.
Sometimes
> it will stop playing and I can hear the motor spinning, and after five or
> ten seconds the high pitched signal will come on. Sometimes it won't play
> (the tape won't move) but I can always hear the motor spinning. Often,
when
> it won't PLAY at all, if I put it in rewind then release the slide, it
will
> play for the above mentioned 5-10 seconds before stopping and signalling.
>
> At the same time I notice the LCD counter is blank, no readout at all.
The
> batteries check out with 1.28v in each. When I listen to the motor
> spinning, it seems strong. I know nothing about this, but sounds like a
> belt slipping, though I don't know if that would cause the LCD counter to
> stay blank. (even when I can get it to play for 10 seconds, the counter
> stays blank, no blinking, no flashing, no text.
>
> If this is a belt, is it easy to disassemble this small dictator to
replace
> it? This is a real good dictator so I'd like to figure out how to fix it.
>
> Can somneone give me advice on this...
>
>
> Thanks, John
>
>

==============================================================================
TOPIC: plasma tv PSU
http://groups.google.com/group/sci.electronics.repair/t/7040ce6f9b2a8504?hl=en
==============================================================================

== 1 of 3 ==
Date: Thurs, Sep 16 2010 11:27 pm
From: "Michael Kennedy"

Just to add to this..

The tv works fine all PSU voltages within specs.. Then it starts clicking a
bit and then shuts down. Seems to click when the brightness changes on the
TV. (Dark picture to bright picture) and it seems to fail more on bright
pictures like cartoons.

When it shuts down it wont restart until the power is removed completely.
The standby light will change from red to green, but to no avail. The 300V
doesn't come up in the PSU. No Vcc only STB voltage. Unplug it plug it back
in and comes right up.

Poking around with freeze spray on some of the suspect components recomended
by the service manual it will shut down, but not instantly as expected. It
takes a minute or two...

Im puzzled what the clicking soud inside this thing is. It is not the
relays and the intensity changes. It always clicks a few times while warming
up.

== 2 of 3 ==
Date: Thurs, Sep 16 2010 11:54 pm
From: stratus46@yahoo.com

On Sep 16, 11:27 pm, "Michael Kennedy" <mike@com> wrote:
> Just to add to this..
>
> The tv works fine all PSU voltages within specs.. Then it starts clicking a
> bit and then shuts down. Seems to click when the brightness changes on the
> TV. (Dark picture to bright picture) and it seems to fail more on bright
> pictures like cartoons.
>
> When it shuts down it wont restart until the power is removed completely.
> The standby light will change from red to green, but to no avail. The 300V
> doesn't come up in the PSU. No Vcc only STB voltage. Unplug it plug it back
> in and comes right up.
>
> Poking around with freeze spray on some of the suspect components recomended
> by the service manual  it will shut down, but not instantly as expected. It
> takes a minute or two...
>
> Im puzzled what the clicking soud  inside this thing is. It is not the
> relays and the intensity changes. It always clicks a few times while warming
> up.

Replace the bad 'lytics and check again. Got an ESR meter? If not,
it's time. Even the cheapy $50 MAT Electronics meter will do OK. SMPSs
are particularly fussy about the caps. 'OK' rarely is OK. Secondary
outputs have to be very good. Panasonic FM, Nichicon PW, HM, HN an HZ
series caps are good. For SMT caps Panasonic FK and FP are good.

G²

G²

== 3 of 3 ==
Date: Fri, Sep 17 2010 12:01 am
From: "Michael Kennedy"

<stratus46@yahoo.com> wrote in message
news:fb454847-244f-458b-8b12-56b687ac311e@j5g2000vbg.googlegroups.com...
On Sep 16, 11:27 pm, "Michael Kennedy" <mike@com> wrote:
> Just to add to this..
>
> The tv works fine all PSU voltages within specs.. Then it starts clicking
> a
> bit and then shuts down. Seems to click when the brightness changes on the
> TV. (Dark picture to bright picture) and it seems to fail more on bright
> pictures like cartoons.
>
> When it shuts down it wont restart until the power is removed completely.
> The standby light will change from red to green, but to no avail. The 300V
> doesn't come up in the PSU. No Vcc only STB voltage. Unplug it plug it
> back
> in and comes right up.
>
> Poking around with freeze spray on some of the suspect components
> recomended
> by the service manual it will shut down, but not instantly as expected. It
> takes a minute or two...
>
> Im puzzled what the clicking soud inside this thing is. It is not the
> relays and the intensity changes. It always clicks a few times while
> warming
> up.

Replace the bad 'lytics and check again. Got an ESR meter? If not,
it's time. Even the cheapy $50 MAT Electronics meter will do OK. SMPSs
are particularly fussy about the caps. 'OK' rarely is OK. Secondary
outputs have to be very good. Panasonic FM, Nichicon PW, HM, HN an HZ
series caps are good. For SMT caps Panasonic FK and FP are good.

G²

I have a bob parker mk2 meter that I buit a few years back. I poked around
with it and didnt find any bad caps, although I didnt remove them all from
circuit. I have my suspiscions that it is bad caps though. There is a
serivce buletion that says to check the 2 400V 250uF caps. They checked ok
out of circuit.. I guess I will double check all the caps again.

==============================================================================
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http://groups.google.com/group/sci.electronics.repair/t/07c7253c48acfc19?hl=en
==============================================================================

== 1 of 1 ==
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