Toshiba TV29C90 problem; Image fades to black...

On 3ÔÂ26ČŐ, ÉĎÎç1Ęą31ˇÖ, Joy <Mycrof...@yahoo.com> wrote:

I am trying to make a beeper to plug into a sonic alert unit for a deaf
person.

I have a 12V DC transformer directly wired to a 3-20V DC beeping siren.
When the transformer is plugged in, the siren goes BEEP...BEEP...BEEP as
it should, but when the power is cut, the beeping fades out instead of
stopping immediately. BEEp...Beep...beee...

Is there a simple way to get the siren to silence as soon as the power is
cut?

Thanks so much!

Joy

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On 3ÔÂ26ČŐ, ÉĎÎç1Ęą22ˇÖ, bpet...@verizon.net (Brad) wrote:

Hi,

I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service
shop with a vertical deflection problem. I replaced R409 1 ohm which was open
(in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6
and -12.6 source (measured at source) are present, but still no vertical
deflection. Horizonal line is abt. 3/4 down from top of screen. When I open
the -12V circuit, in effect removing -12V source, the horizontal line is a
little above the middle. Yoke test revealed yoke is not shorted or open. I
tested several parts around "IC301".

Has anyone repaired this (or similar) model TV with this problem?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

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manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
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On 3ÔÂ25ČŐ, ĎÂÎç10Ęą47ˇÖ, "N Cook" <diver...@gazeta.pl> wrote:

Just as I was blowing out, with a 1KW Martindale, the crud of ages from an
amp and its fans.
Thought - these fans act as DC generators if blown forcefully. Presumably
you could damage, if driving negative volts into ps or fan contol circuit.
Next time I will jam something in the blades before zapping one with 1KW of
draught.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list onhttp://home..graffiti.net/diverse:graffiti.net/

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manufacturers... but lack the time to contact suppliers, negotiate
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without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

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On 3ÔÂ26ČŐ, ĎÂÎç9Ęą15ˇÖ, john24242442 <johnsomervi....@talktalk.net> wrote:

I currently own and sell an ebookwww.wiiwillrockyou.biz
I need someone to write a weekly update on advanced methods of Wii
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contracts, arrange shipping or monitor product quality? Don't worry -
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catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

[bz]

"jimhigh66" <mounthighly@aol.com> wrote in
news:2d20286a258432980ba6be3d2a215801@localhost.talkaboutelectronicequipmen
t.com:

Tnx all. The surge was a overvoltage surge (I had several wall
transformers burn-out on other equipment). Tnx for the warnings -- I do
have a bench isolation transformer. I may just try replacing the 82 ufd
capacitor and see if that fixes it. If not it can be added to the pile
of defective VCRs (I've never had one that lasted even with limited use!
) and I'll try to find a like-new replacement (I'd really like to advoid
the combination units). Jim H.

The power company should pay for replacements or your homeowner's insurance.





--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[PeterD]

On Wed, 26 Mar 2008 17:45:42 +0000 (UTC), bz
<bz+spr@ch100-5.chem.lsu.edu> wrote:

"jimhigh66" <mounthighly@aol.com> wrote in
news:2d20286a258432980ba6be3d2a215801@localhost.talkaboutelectronicequipmen
t.com:

Tnx all. The surge was a overvoltage surge (I had several wall
transformers burn-out on other equipment). Tnx for the warnings -- I do
have a bench isolation transformer. I may just try replacing the 82 ufd
capacitor and see if that fixes it. If not it can be added to the pile
of defective VCRs (I've never had one that lasted even with limited use!
) and I'll try to find a like-new replacement (I'd really like to advoid
the combination units). Jim H.


The power company should pay for replacements or your homeowner's insurance.

Power company possibly, if they were at fault (i.e. not lightning, act
of god, car crashing into a pole, etc.) Homeowner's insurance is
useless because of deductables.

 

[Joy]

On Tue, 25 Mar 2008 17:41:38 -0400, James Sweet <jamessweet@hotmail.com>
wrote:

Would a 110 vac relay be activated by a 12-15V DC transformer?
And this would mean both the relay and the siren would be powered by the
same power supply (the dc transformer) except that the relay would also
switch the siren. Is this correct?

I WAS trying to be really simple which is why the light bulb or resistor
idea sounds good.

How much damage could I do by using a resistor box and starting with a
high value and slowly working down until it worked acceptably? I guess
I
could damage something in the process, but how likely do you think it
would be?

Joy



He means connect the relay to the same power source that the transformer
is
connected to, and use the contacts to switch the output of the
transformer.
That route occurred to me but I skipped it as it seems more complex than
other solutions.

You won't hurt anything with the resistor, just don't go so low in value
that you draw more than the transformer is rated to produce, I would try
something around 470 ohms 1/2W, that's a common value. That'll draw about
25mA and should silence the beeper immediately.

Just wanted to thank you all. A 400 ohm resistor did a pretty good job of
doing what I wanted!

Joy

 

[Allodoxaphobia]

On Wed, 26 Mar 2008 17:54:44 -0400, PeterD wrote:

On Wed, 26 Mar 2008 17:45:42 +0000 (UTC), bz wrote:
"jimhigh66" <mounthighly@aol.com> wrote:

Tnx all. The surge was a overvoltage surge (I had several wall
transformers burn-out on other equipment).

The power company should pay for replacements or your homeowner's insurance.

Power company possibly, if they were at fault (i.e. not lightning, act
of god, car crashing into a pole, etc.) Homeowner's insurance is
useless because of deductables.

File a claim on your HO policy and get cancelled. What a racket!

 

[bz]

PeterD <peter2@hipson.net> wrote in
news:ifhlu35bs2cg7953do5q827hg7cqt4pp01@4ax.com:

On Wed, 26 Mar 2008 17:45:42 +0000 (UTC), bz
bz+spr@ch100-5.chem.lsu.edu> wrote:

"jimhigh66" <mounthighly@aol.com> wrote in
news:2d20286a258432980ba6be3d2a215801@localhost.talkaboutelectronicequipm
en t.com:

Tnx all. The surge was a overvoltage surge (I had several wall
transformers burn-out on other equipment). Tnx for the warnings -- I
do have a bench isolation transformer. I may just try replacing the
82 ufd capacitor and see if that fixes it. If not it can be added to
the pile of defective VCRs (I've never had one that lasted even with
limited use! ) and I'll try to find a like-new replacement (I'd really
like to advoid the combination units). Jim H.


The power company should pay for replacements or your homeowner's
insurance.

Power company possibly, if they were at fault (i.e. not lightning, act
of god, car crashing into a pole, etc.) Homeowner's insurance is
useless because of deductables.

If it came in on the power line, the power companies insurance may still
cover it.

Check the policy. The deductable may not apply to Personal property damaged
by lightning or a power surge. You need to read your policy carefully.




--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+ser@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[Brad]

Hi,

I couldn't find any defective parts so I downloaded data info (.PDF) on
this "replacement" (Fox International says) and compared it to the data (.PDF)
I downloaded on the original part. It turned out, it is the WRONG
part. I called TCE and was told that "266908" is the correct part number.
Note: Fox International's research department is unreliable.

If I repair this TV, I will post an "UPDATE:...." in Subject.

Brad


On Tue, 25 Mar 2008 17:22:01 GMT, in sci.electronics.repair you wrote:

Hi,

I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service
shop with a vertical deflection problem. I replaced R409 1 ohm which was open
(in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6
and -12.6 source (measured at source) are present, but still no vertical
deflection. Horizonal line is abt. 3/4 down from top of screen. When I open
the -12V circuit, in effect removing -12V source, the horizontal line is a
little above the middle. Yoke test revealed yoke is not shorted or open. I
tested several parts around "IC301".

Has anyone repaired this (or similar) model TV with this problem?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

 

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On 3ÔÂ26ČŐ, ĎÂÎç9Ęą15ˇÖ, john24242442 <johnsomervi....@talktalk.net> wrote:

I currently own and sell an ebookwww.wiiwillrockyou.biz
I need someone to write a weekly update on advanced methods of Wii
repair.
Genuine engineers pleaes email me at i...@wiiwillrockyou.biz

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
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catalog at seriouswholesale. com You'll have peace of mind thanks to
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Selling on eBay or your own online store? Send products direct from
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without holding any of your own inventory! Any questions you have will
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Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

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On 3ÔÂ26ČŐ, ÉĎÎç1Ęą35ˇÖ, "jimhigh66" <mounthig...@aol.com> wrote:

I have a Panasonic model PV-V4522 that has power supply damage -- screen
indicates there's some AC in the unit where there should be DC. A power
supply 82Mfd/200V capacitor has a swelled end and I suspect that part but
before I disassemble the unit to possibly replace that I'd like to look
for other possible problems by checking some voltages if I knew what they
should be and where to measure. Help would be appreciated. Tnx Jim

--
Message posted usinghttp://www.talkaboutelectronicequipment.com/group/sci.electronics.rep...
More information athttp://www.talkaboutelectronicequipment.com/faq.html

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
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Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

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with no additional fee - Pay by safely by PayPal seriouswholesale
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On 3ÔÂ26ČŐ, ÉĎÎç1Ęą31ˇÖ, Joy <Mycrof...@yahoo.com> wrote:

I am trying to make a beeper to plug into a sonic alert unit for a deaf
person.

I have a 12V DC transformer directly wired to a 3-20V DC beeping siren.
When the transformer is plugged in, the siren goes BEEP...BEEP...BEEP as
it should, but when the power is cut, the beeping fades out instead of
stopping immediately. BEEp...Beep...beee...

Is there a simple way to get the siren to silence as soon as the power is
cut?

Thanks so much!

Joy

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
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products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

On 3ÔÂ26ČŐ, ÉĎÎç1Ęą22ˇÖ, bpet...@verizon.net (Brad) wrote:

Hi,

I have a RCA TV model 14F512T, ch M123SP (NO Schematic) in my TV service
shop with a vertical deflection problem. I replaced R409 1 ohm which was open
(in -12.6 source) and I replaced the vertical IC "IC301". Note: both +12.6
and -12.6 source (measured at source) are present, but still no vertical
deflection. Horizonal line is abt. 3/4 down from top of screen. When I open
the -12V circuit, in effect removing -12V source, the horizontal line is a
little above the middle. Yoke test revealed yoke is not shorted or open. I
tested several parts around "IC301".

Has anyone repaired this (or similar) model TV with this problem?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

On 3ÔÂ25ČŐ, ĎÂÎç10Ęą47ˇÖ, "N Cook" <diver...@gazeta.pl> wrote:

Just as I was blowing out, with a 1KW Martindale, the crud of ages from an
amp and its fans.
Thought - these fans act as DC generators if blown forcefully. Presumably
you could damage, if driving negative volts into ps or fan contol circuit.
Next time I will jam something in the blades before zapping one with 1KW of
draught.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list onhttp://home..graffiti.net/diverse:graffiti.net/

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
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[Esther & Fester Bestertes]

And the winner is...

Silver conductive epoxy:

<http://mgchemicals.com/products/8331.html>

Conductive wasn't a requirement, but it's the toughest in my small battery of
tests.

Thanks to all who contributed.

FBt

 

[jimhigh66]

The damage was my fault when, as a result of an ice storm, I connected a
240V generator to the house system and the unequal 120V loads see-sawed
one side low and the other side high (live and learn) + the damage never
equaled my insurance deductable.

--
Message posted using http://www.talkaboutelectronicequipment.com/group/sci.electronics.repair/
More information at http://www.talkaboutelectronicequipment.com/faq.html

 

[bz]

"jimhigh66" <mounthighly@aol.com> wrote in
news:56420805662640a973b79c65c25755cb@localhost.talkaboutelectronicequipmen
t.com:

The damage was my fault when, as a result of an ice storm, I connected a
240V generator to the house system and the unequal 120V loads see-sawed
one side low and the other side high (live and learn)

Thanks. That will serve to remind me of what NOT to do next time our power
is out.
Hurrican Andrew had me without power for a week and Katrina ... well the
power was out at our house for over a week but we were out of town.

+ the damage never
equaled my insurance deductable.

If you have checked your policy carefully or with your agent, then you have
my sympathy.

If you are just assuming that the deductable would apply in this case, it
won't cost you a thing to check and you might be pleasantly surprised.





--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+ser@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[Ron(UK)]

N Cook wrote:

If switched off (yes via the power reset button rather than pulling the
power plug), left some time and then powered up.
It plays dumb, display echos the key presses and midi functions normally but
no sound out of the built in speakers unless you wake it up going into demo
mode for a bit. Nothing wrong with mute/standby functions of the main amp.
No flash memory card used with it but are there switch contacts in the card
slot that should be open or closed and falsely registering a card is in the
slot?

There might be a micro reset sequence which will get everything back to
factory settings, you need to search the interweb thing

Ron(UK)