Need SMT component value

Aug 19, 2008 6 Replies

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...


but

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:

Not 100% sure about the caps, but you can verify them for yourself here (pages 11 & 12):

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25V 2.2uF

20V 10uF

FWIW, this 3-pin double diode also uses the 2L marking code:

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2L BAT754A Phi J SOT23 Schottky barrier double diodes

- 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: snipped-for-privacy@4ax.com...

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

L2 or 2L ?

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: snipped-for-privacy@4ax.com...

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

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.

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