What value is this this Cap,its marked "104K" and is on the bridge rectifier
side of power supply of a portable TV.

Its leaky as noticable on the PCB

Thanks.

"George" wrote in message
...
What value is this this Cap,its marked "104K" and is on the bridge
rectifier
side of power supply of a portable TV.

Its leaky as noticable on the PCB

Thanks.



Hah! its ok I found its value...

Its 100,000pF

George wrote:
What value is this this Cap,its marked "104K" and is on the bridge rectifier
side of power supply of a portable TV.

Means 10 followed by 4 zeros pF, so 100,000pF or 100nF. K means
tolerance is +/- 10%.


--
Grunff
Radioactive Keyrings!
http://www.shinyshack.com/product.php?prid=211713

In message , George
writes
What value is this this Cap,its marked "104K" and is on the bridge rectifier
side of power supply of a portable TV.

10 with 4 following "0"s in pico farads = 100nF prolly

although capacitor colour codes are historically inconsistent

--
geoff

George wrote :
What value is this this Cap,its marked "104K" and is on the bridge rectifier
side of power supply of a portable TV.

Its leaky as noticable on the PCB

Thanks.

10 with four zeros pico, so 100000 picoF/ 100nF. Not sure of the K, but
I think it is probably the temperature coefficient.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On Thu, 27 Mar 2008 22:17:35 GMT, "George" wrote:

What value is this this Cap,its marked "104K" and is on the bridge rectifier
side of power supply of a portable TV.

..1uF

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

"Geo" wrote in message
news
On Thu, 27 Mar 2008 22:17:35 GMT, "George" wrote:

What value is this this Cap,its marked "104K" and is on the bridge
rectifier
side of power supply of a portable TV.

.1uF

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

oops! wrong value given,its a '102k' which will be 1000Pf 10%

On 28/03/2008 17:14, George wrote:

"Geo" wrote in message
news
On Thu, 27 Mar 2008 22:17:35 GMT, "George" wrote:

Its leaky as noticable on the PCB
Unusual for a ceramic (no liquid to leak)

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

sure some liquid hasn't leaked into the TV?

"Andy Burns" wrote in message
...
On 28/03/2008 17:14, George wrote:

"Geo" wrote in message
news
On Thu, 27 Mar 2008 22:17:35 GMT, "George"
wrote:

Its leaky as noticable on the PCB
Unusual for a ceramic (no liquid to leak)

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

sure some liquid hasn't leaked into the TV?

No sign of that happend MrBurns and I would have been informed buy the guy
if it did.

By the by I've come up with an ingenious idea that suit other people lie me
who repair anything electronic...

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards and components ie dry joints are sometimes hard to
detect PCB tracking fractures ect ect so I am using one of the wireless
cameras I bought of ebay which the reciever is connected to a good composite
monitor and as the camera can get real close up it reveals the finer dry
joints or circuit tracking fractures the naked eye cannot without the help
of a magnifier.


So what do think about that? :-)

"George" wrote in message
...

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

It hasn’t leaked, its been fried

What does the underside tracks look like.







-

"Mark" wrote in message
...

"George" wrote in message
...

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

It hasn't leaked, its been fried

What does the underside tracks look like.







-



Dunno? have not vetured that far yet until I aquire the replacement cap,no
sense in making work for meself till I have the cap ie they're a pain in the
backside removing TV circuit boards especially when its a combo video/TV.
:-(

On Fri, 28 Mar 2008 17:38:55 UTC, "George"
wrote:

By the by I've come up with an ingenious idea that suit other people lie me
who repair anything electronic...

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards and components ie dry joints are sometimes hard to
detect PCB tracking fractures ect ect so I am using one of the wireless
cameras I bought of ebay which the reciever is connected to a good composite
monitor and as the camera can get real close up it reveals the finer dry
joints or circuit tracking fractures the naked eye cannot without the help
of a magnifier.


So what do think about that? :-)

Not bad...but two dimensional (you lose the stereoscopic effect so no
depth perception).

(not that I have stereo vision any more anyway, and surgeons seem to
manage)

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
http://www.diybanter.com

On Fri, 28 Mar 2008 17:49:46 GMT, Mark wrote:

"George" wrote in message
...

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

It hasn’t leaked, its been fried

What does the underside tracks look like.

That was my thought as well. Perhaps a dry joint on t'otherside.


--
the dot wanderer at tesco dot net

"George" wrote in message
...


Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

It hasn't leaked, its been fried

What does the underside tracks look like.


Dunno? have not vetured that far yet until I aquire the replacement cap,no
sense in making work for meself till I have the cap ie they're a pain in
the
backside removing TV circuit boards especially when its a combo video/TV.
:-(




Well you may be lucky but a Cap letting go like that, will more then likely
result in something else going tits-up first or after.



-

"Bob Eager" wrote in message
...
On Fri, 28 Mar 2008 17:38:55 UTC, "George"
wrote:

By the by I've come up with an ingenious idea that suit other people lie
me
who repair anything electronic...

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards and components ie dry joints are sometimes
hard to
detect PCB tracking fractures ect ect so I am using one of the wireless
cameras I bought of ebay which the reciever is connected to a good
composite
monitor and as the camera can get real close up it reveals the finer dry
joints or circuit tracking fractures the naked eye cannot without the
help
of a magnifier.


So what do think about that? :-)

Not bad...but two dimensional (you lose the stereoscopic effect so no
depth perception).

(not that I have stereo vision any more anyway, and surgeons seem to
manage)

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
http://www.diybanter.com

Well MrEager it works a treat as it means no accidental hair raising shocks
as the camera is attached to a plastic rod and it can get in most
inaccessible areas of the chassis whilst the board is in situ.
A bright led is attached to the camera body for lighting the way. ;-)

On Fri, 28 Mar 2008 17:23:13 GMT, "George" wrote:


"Andy Burns" wrote in message
...

sure some liquid hasn't leaked into the TV?

No sign of that happend MrBurns and I would have been informed buy the guy
if it did.

So he wasn't watching when the cat was caught short while draped over the back
of the set...

Geo

"Mark" wrote in message



Well you may be lucky but a Cap letting go like that, will more then
likely
result in something else going tits-up first or after.



-



The quick-low fuse goes first. ;-)

Years ago the old TV's had mechanical fuses on some sets and I kept a few of
these because they became a god send in respect to the glass type fuses when
repiaring the TV and Vids ie to save on fuses blowing whilst doing the
repair you would solder the mechanical fuse to the fuse tracking and if it
still blew the fuse all you had to do was push the red button to reset the
mechanical fuse until you sussed out why the fuse kept blowing.

Alas I lost those mechanical fuse over time. :-(

"Geo" wrote in message
...
On Fri, 28 Mar 2008 17:23:13 GMT, "George" wrote:


"Andy Burns" wrote in message
...

sure some liquid hasn't leaked into the TV?

No sign of that happend MrBurns and I would have been informed buy the
guy
if it did.

So he wasn't watching when the cat was caught short while draped over the
back
of the set...

Geo

I would have thought the cat would have gone Pssst! instead of Purrrr! :-)

HI George

On Fri, 28 Mar 2008 17:53:29 GMT, "George"
wrote:


"Mark" wrote in message
...

"George" wrote in message
...

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

It hasn't leaked, its been fried

What does the underside tracks look like.



Dunno? have not vetured that far yet until I aquire the replacement cap,no
sense in making work for meself till I have the cap ie they're a pain in the
backside removing TV circuit boards especially when its a combo video/TV.
:-(


Don't know 'why' it's failed - could be the cap itself or 'something
else' - but whatever the reason it managed to get very hot before it
failed - the 'deposit' on the board looks like boiled copper from the
component lead.

You may find that there are burnt / fused tracks on the underside of
the board..... in which case the blown up capacitor may be the least
of your problems g

Also - the cross-hatching on the PCB indicates (I think) areas which
are 'live' and can bite - so take care....

Good luck
Adrian

In uk.d-i-y, George wrote:
By the by I've come up with an ingenious idea that suit other people lie me
who repair anything electronic...

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards and components ie dry joints are sometimes hard to
detect PCB tracking fractures ect ect so I am using one of the wireless
cameras I bought of ebay which the reciever is connected to a good composite
monitor and as the camera can get real close up it reveals the finer dry
joints or circuit tracking fractures the naked eye cannot without the help
of a magnifier.


So what do think about that? :-)

Ingenious, but rather clumsy and expensive for a magnifying glass!
Simpler options are supermarket reading glasses (strong, +3.0) or a
jeweller's loupe.

--
Mike Barnes

"Adrian" wrote in message


Don't know 'why' it's failed - could be the cap itself or 'something
else' - but whatever the reason it managed to get very hot before it
failed - the 'deposit' on the board looks like boiled copper from the
component lead.

You may find that there are burnt / fused tracks on the underside of
the board..... in which case the blown up capacitor may be the least
of your problems g

Also - the cross-hatching on the PCB indicates (I think) areas which
are 'live' and can bite - so take care....

Good luck
Adrian

Its probably been going for a while and every time he's pressed the on
button it has taken more punishment from switch on and finally given up the
ghost as the fuse keeps blowing now?

"Mike Barnes" wrote in message
news
In uk.d-i-y, George wrote:
By the by I've come up with an ingenious idea that suit other people lie
me
who repair anything electronic...

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards and components ie dry joints are sometimes hard
to
detect PCB tracking fractures ect ect so I am using one of the wireless
cameras I bought of ebay which the reciever is connected to a good
composite
monitor and as the camera can get real close up it reveals the finer dry
joints or circuit tracking fractures the naked eye cannot without the
help
of a magnifier.


So what do think about that? :-)

Ingenious, but rather clumsy and expensive for a magnifying glass!
Simpler options are supermarket reading glasses (strong, +3.0) or a
jeweller's loupe.

--
Mike Barnes

Have you ever tried looking for dodgy component in a TV in situ? let me tell
you if your head touches the CRT PCB whilst trying to keep the Loupe in the
eye socket and at the same time browsing over the chassis, it'll wake you up
and make you have a jig around the room. ;-)

"Mike Barnes" wrote in message

Ingenious, but rather clumsy and expensive for a magnifying glass!
Simpler options are supermarket reading glasses (strong, +3.0) or a
jeweller's loupe.

--
Mike Barnes

There ya go MrBarnes...not that expensive :-) and a monitor can be gotton
off FREECYCLE

http://tinyurl.com/22f9w3

George wrote:

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards

If you have problems seeing something the size of the capacitor in
question how do you get on with the 0402 and 0603 size SMDs?

--
Andy

George formulated on Friday :
"Geo" wrote in message
news
On Thu, 27 Mar 2008 22:17:35 GMT, "George" wrote:

What value is this this Cap,its marked "104K" and is on the bridge
rectifier side of power supply of a portable TV.

.1uF

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

That reads 102K rather than 104, so reduce the previously suggested
zeros by 2 (divide by 100).

From what I can see... That ceramic is not leaking or even by the looks
of it faulty. To me it looks as if some metal may have fallen across
the terminals of the cap and perhaps that the PCB tracks have suffered
some flash over. I'm a little puzzled by the pale green deposits, it
looks like copper sulphate.

Ceramic when they go, usually have some more obvious signs. The case
will be blackened and split due to heat.

A repair would involve drilling through the PCB to clear all the
blackened material, then installing a new ceramic across what ever is
left of the original tracks.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

"Andy Wade" wrote in message
...
George wrote:

My peepers are not up to scratch anymore when it comes to repairing
electronic circuit boards

If you have problems seeing something the size of the capacitor in
question how do you get on with the 0402 and 0603 size SMDs?

--
Andy

Try to avoid Surface Mount Devices MrHall ;-)

No the camera can go real close,the problem stems to getting a reading so
close even with my reading specs on as the eyes tend to squint and become
blurred.

I cannot read the real small print on some everyday items or paperwork for
instance on medicine lables or containers.

The Wanderer wrote:

It hasn’t leaked, its been fried

That was my thought as well. Perhaps a dry joint on t'otherside.

Or it may be that some other fault has resulted in full mains or
rectified mains voltage appearing across this capacitor which, being
rated at perhaps 50 V DC, has responded by blowing-up. Collateral
damage like this is by no means uncommon with SMPS faults.

--
Andy

On Fri, 28 Mar 2008 18:21:42 +0000, Adrian wrote:

Don't know 'why' it's failed - could be the cap itself or 'something
else'

I'd put money on something else, looking at the cap wires, the burnt
board, coloured deposit and general sticky yuk of the board particulary
top right corner. I'd say some liquid has got in at some point and caused
a flash over between the pins of that C.

It appears it may have worked for a while but now the fuse blows at switch
on. Suspect a knackered SMPSU, so probably require a new pair of driver
transistors, the control IC and other sundry bits to get back working. If
it takes more than a morning in total to repair it's not economic, there
are other reasons for fixing things besides money though.

Also - the cross-hatching on the PCB indicates (I think) areas which
are 'live' and can bite - so take care....

Yep down to the left of the big C below the burnt one are the words "LIVE
PART ..." The diodes look to be 1N4006, rated at 800V. Bite with a capital
B.

In message , George
writes

"Geo" wrote in message
news
On Thu, 27 Mar 2008 22:17:35 GMT, "George" wrote:

What value is this this Cap,its marked "104K" and is on the bridge
rectifier
side of power supply of a portable TV.

.1uF

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

Looks like copper salts (from the wire?)

is that a burn I see between the legs ?

Liquid has dripped on it or something

--
geoff

In message , George
wrote

"Geo" wrote in message
news
On Thu, 27 Mar 2008 22:17:35 GMT, "George" wrote:

What value is this this Cap,its marked "104K" and is on the bridge
rectifier
side of power supply of a portable TV.

.1uF

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg


The capacitor is marked 102 not 104.

The damage looks like burning caused by a liquid being dripped onto the
board. You may have to drill out the carbonised area of the board or
else the carbon will be conductive.

Consider also the voltage rating of the capacitor - it could be rated at
250V or 400V (maybe higher). It's NOT the 50V( ish) type ceramic plate
capacitor.

Suppliers CPC, Maplin, RS
www.cpc.co.uk
www.maplin.co.uk
rswww.com




--
Alan
news2006 {at} amac {dot} f2s {dot} com

On Fri, 28 Mar 2008 18:24:18 UTC, Mike Barnes
wrote:

Ingenious, but rather clumsy and expensive for a magnifying glass!
Simpler options are supermarket reading glasses (strong, +3.0) or a
jeweller's loupe.

I use four different loupes, but need to wear my glasses too. So I also
have one of these; four different lenses and some illumination too:

http://tinyurl.com/2k4nkq

But the depth problem is still a bugger!

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
http://www.diybanter.com

"Bob Eager" wrote in message
...
On Fri, 28 Mar 2008 18:24:18 UTC, Mike Barnes
wrote:

Ingenious, but rather clumsy and expensive for a magnifying glass!
Simpler options are supermarket reading glasses (strong, +3.0) or a
jeweller's loupe.

I use four different loupes, but need to wear my glasses too. So I also
have one of these; four different lenses and some illumination too:

http://tinyurl.com/2k4nkq

But the depth problem is still a bugger!

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
http://www.diybanter.com


I got mine cheaper but the problem is you cannot your head under the TV tube
neck to look at components in that area or places where there is an
obstruction. ;-)

http://tinyurl.com/33rmgo

On Fri, 28 Mar 2008 20:58:22 UTC, "George"
wrote:

I use four different loupes, but need to wear my glasses too. So I also
have one of these; four different lenses and some illumination too:

http://tinyurl.com/2k4nkq

But the depth problem is still a bugger!

I got mine cheaper but the problem is you cannot your head under the TV tube
neck to look at components in that area or places where there is an
obstruction. ;-)

http://tinyurl.com/33rmgo

I didn't actually pay that price...special offer. I use mine mainly for
building boards - and the long focus one works OK for the innards of
Pcs.



--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
http://www.diybanter.com

"Mark" wrote in message
...

"George" wrote in message
...

Its leaky as noticable on the PCB

Unusual for a ceramic (no liquid to leak)

Geo

Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg

It hasn't leaked, its been fried

What does the underside tracks look like.







-



Perfect,no damage to the underside...weird

George explained :
Perfect,no damage to the underside...weird

Flash over between the legs of the capacitor then. You need to at least
clean the carbonised layer off the upper surface of the PCB as a first
step.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

In uk.d-i-y, George wrote:
the problem is you cannot your head under the TV tube

Well, yes, you can if you're not careful. :-)

--
Mike Barnes

Adrian wrote:
HI George

On Fri, 28 Mar 2008 17:53:29 GMT, "George"
wrote:

"Mark" wrote in message
...
"George" wrote in message
...
Its leaky as noticable on the PCB
Unusual for a ceramic (no liquid to leak)

Geo
Sorry for the high definition.
http://www.20xx20.myby.co.uk/cap.jpg
It hasn't leaked, its been fried

What does the underside tracks look like.


Dunno? have not vetured that far yet until I aquire the replacement cap,no
sense in making work for meself till I have the cap ie they're a pain in the
backside removing TV circuit boards especially when its a combo video/TV.
:-(


Don't know 'why' it's failed - could be the cap itself or 'something
else' - but whatever the reason it managed to get very hot before it
failed - the 'deposit' on the board looks like boiled copper from the
component lead.


The worrying possibility is a short between primary and secondary on the
mains transformer.

You may find that there are burnt / fused tracks on the underside of
the board..... in which case the blown up capacitor may be the least
of your problems g

Also - the cross-hatching on the PCB indicates (I think) areas which
are 'live' and can bite - so take care....

Good luck
Adrian

"Dave Liquorice" wrote in message
ll.net...
On Fri, 28 Mar 2008 18:21:42 +0000, Adrian wrote:

Don't know 'why' it's failed - could be the cap itself or 'something
else'

I'd put money on something else, looking at the cap wires, the burnt
board, coloured deposit and general sticky yuk of the board particulary
top right corner. I'd say some liquid has got in at some point and caused
a flash over between the pins of that C.

It appears it may have worked for a while but now the fuse blows at switch
on. Suspect a knackered SMPSU, so probably require a new pair of driver
transistors, the control IC and other sundry bits to get back working. If
it takes more than a morning in total to repair it's not economic, there
are other reasons for fixing things besides money though.



No chance of just faulty cap then? ;-)