Hi ,

26 VAC has been put on a DOME Cameras instead of 12DC.

4 SMT parts blewed up . I have a working one that I can read the marking but
I cannot find what are the value of them.

Here are the 4 parts (i.e:marking on the parts) :

EJ6 d.....Seems to be a SMT capacitor
DA7 J.....Seems to be a SMT capacitor
6R8.....I'm assuming a 6.8 Ohms resistor
2L.....Very small SMT diodes (2 pins)

These parts are connected to the 12V input.

Can anybody help with the value of these components ?

Tks...

On Aug 19, 9:32*am, "Benoit Pothier" wrote:
Hi ,

26 VAC has been put on a DOME Cameras instead of 12DC.

4 SMT parts blewed up . I have a working one that I can read the marking but
I cannot find what are the value of them.

Here are the 4 parts (i.e:marking on the parts) :

EJ6 d.....Seems to be a SMT capacitor
DA7 J.....Seems to be a SMT capacitor
6R8.....I'm assuming a 6.8 Ohms resistor
2L.....Very small SMT diodes (2 pins)

These parts are connected to the 12V input.

Can anybody help with the value of these components ?

Tks...

try the IC Master on the web it will give you equalivent parts from
other manufacturers, pin outs etc. function etc.

On Tue, 19 Aug 2008 10:32:38 -0400, "Benoit Pothier"
put finger to keyboard and composed:

Hi ,

26 VAC has been put on a DOME Cameras instead of 12DC.

4 SMT parts blewed up . I have a working one that I can read the marking but
I cannot find what are the value of them.

Here are the 4 parts (i.e:marking on the parts) :

Not 100% sure about the caps, but you can verify them for yourself
here (pages 11 & 12):
http://web.archive.org/web/200305241...ges/smdman.pdf
http://www.fpga4fun.com/external/SMD/smdman.pdf

EJ6 d.....Seems to be a SMT capacitor

25V 2.2uF

DA7 J.....Seems to be a SMT capacitor

20V 10uF

6R8.....I'm assuming a 6.8 Ohms resistor
2L.....Very small SMT diodes (2 pins)

FWIW, this 3-pin double diode also uses the 2L marking code:
http://www.nxp.com/acrobat_download/...4_SERIES_2.pdf

2L BAT754A Phi J SOT23 Schottky barrier double diodes

These parts are connected to the 12V input.

Can anybody help with the value of these components ?

Tks...


- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Tks a lot.

For the L2 diode , it's not a SOT23 pkg.

It's a 2 pins diode.

I tried to find a relataion on the net but without success.






"Franc Zabkar" a écrit dans le message de news:
...
On Tue, 19 Aug 2008 10:32:38 -0400, "Benoit Pothier"
put finger to keyboard and composed:

Hi ,

26 VAC has been put on a DOME Cameras instead of 12DC.

4 SMT parts blewed up . I have a working one that I can read the marking
but
I cannot find what are the value of them.

Here are the 4 parts (i.e:marking on the parts) :

Not 100% sure about the caps, but you can verify them for yourself
here (pages 11 & 12):
http://web.archive.org/web/200305241...ges/smdman.pdf
http://www.fpga4fun.com/external/SMD/smdman.pdf

EJ6 d.....Seems to be a SMT capacitor

25V 2.2uF

DA7 J.....Seems to be a SMT capacitor

20V 10uF

6R8.....I'm assuming a 6.8 Ohms resistor
2L.....Very small SMT diodes (2 pins)

FWIW, this 3-pin double diode also uses the 2L marking code:
http://www.nxp.com/acrobat_download/...4_SERIES_2.pdf

2L BAT754A Phi J SOT23 Schottky barrier double diodes

These parts are connected to the 12V input.

Can anybody help with the value of these components ?

Tks...


- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Wed, 20 Aug 2008 06:50:03 -0400, "Bentech" put
finger to keyboard and composed:

For the L2 diode , it's not a SOT23 pkg.

L2 or 2L ?

It's a 2 pins diode.

It would help if you traced the circuit. Sometimes designers place a
reverse biased rectifier diode, eg 1n4001, across the input terminals
for reverse polarity protection. An AC input voltage would have short
circuited it.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

It's marked 2L on it.

It's in serie with the 12 volts line.


"Franc Zabkar" a écrit dans le message de news:
...
On Wed, 20 Aug 2008 06:50:03 -0400, "Bentech" put
finger to keyboard and composed:

For the L2 diode , it's not a SOT23 pkg.

L2 or 2L ?

It's a 2 pins diode.

It would help if you traced the circuit. Sometimes designers place a
reverse biased rectifier diode, eg 1n4001, across the input terminals
for reverse polarity protection. An AC input voltage would have short
circuited it.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Thu, 21 Aug 2008 13:29:44 -0400, "Bentech" put
finger to keyboard and composed:

It's marked 2L on it.

It's in serie with the 12 volts line.

In that case it is probably a 1A rectifier which provides
non-destructive reverse polarity protection. You should be able to use
a 1N4001 if you can make it fit. The diode's current rating will be
reflected in the rating of the supply.

Have you verified whether the camera uses a regulator further
downstream? If it doesn't, then you can expect more damage elsewhere.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.