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Old 12-06-2011, 08:34 PM   #1
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need to identify a part from my outdoor lights


I have the following lights but a part keep failing. I am not able to id the part to replace it. Below are some pics if anyone can help me please do.


On the board its part R66




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Old 12-06-2011, 08:36 PM   #2
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need to identify a part from my outdoor lights


So just buy a new sencer, there sold in Lowes and Home Depot.

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Old 12-06-2011, 08:37 PM   #3
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need to identify a part from my outdoor lights


It is a resistor. How do you know "it keeps failing"?
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Old 12-06-2011, 08:47 PM   #4
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need to identify a part from my outdoor lights


Resistor don't fail. Some other part failed and cause too much current through the resistor.
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Old 12-07-2011, 12:16 AM   #5
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need to identify a part from my outdoor lights


It is burnt and had chard marks on the bottom of it. Thatís how i know itís no good. Good point i never thought about it not being that part that failed but the part that took the result of a failing part.

The new ones are like 25 plus dollars and i have 5 of these around the house. I was hoping to buy a dollar part for each and just fix them.
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Old 12-07-2011, 01:09 AM   #6
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need to identify a part from my outdoor lights


Quote:
Originally Posted by robkiller View Post
It is burnt and had chard marks on the bottom of it. That’s how i know it’s no good. Good point i never thought about it not being that part that failed but the part that took the result of a failing part.

The new ones are like 25 plus dollars and i have 5 of these around the house. I was hoping to buy a dollar part for each and just fix them.
Joed is right and something else on the board may have failed. You might want to check for recalls as there is likely a design problem with that board.

Last edited by zappa; 12-07-2011 at 01:49 AM.
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Old 12-07-2011, 03:17 AM   #7
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need to identify a part from my outdoor lights


I agree it should have one since every one of my 5 failed. I got it at sams club just over a year ago but i cant find them or who makes them. So I am out of luck without knowing who makes them. But thanks for the input everyone. Looks like it is the expensive way.
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Old 12-07-2011, 04:25 AM   #8
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need to identify a part from my outdoor lights


The biggest killer with the motion sensors is the surge that useally do it.

I useally buy RAB luminaries for motion sensors they genrally little more expensive but not super senstive to the surge { but it can happend but not as quick as unnamed cheap brands will do } not all big box store will stock this but electrical supply sure most case they will have it on stock.

Merci,
Marc
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Old 12-07-2011, 04:49 AM   #9
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need to identify a part from my outdoor lights


It looks like part of the power supply,
On of those diodes could be faulty,
I suspect they are zener diodes and the resistor
is used in association with the zener, so if the zener fails
then the resistor burns up.
If you can find out the value of the resistor you could replace it.
Can you look inside another working unit ?
Then note the color code.
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Old 12-07-2011, 04:50 AM   #10
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need to identify a part from my outdoor lights


It looks like part of the power supply,
One of those diodes could be faulty !
I suspect they are zener diodes,
and the resistor is used in association with the zener,
so if the zener fails then the resistor burns up.
If you can find out the value of the resistor,
you could replace it.
Can you look inside another working unit ?
Then note the color code.
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Old 12-08-2011, 06:08 AM   #11
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need to identify a part from my outdoor lights


I have checked the all the parts of the board but the relay. I am thinking it may be the relay. I am going to wire it up when i get time and test that thought.
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Old 12-08-2011, 06:17 AM   #12
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need to identify a part from my outdoor lights


Quote:
Originally Posted by robkiller View Post
I have checked the all the parts of the board but the relay. I am thinking it may be the relay. I am going to wire it up when i get time and test that thought.
A relay wouldn't cause that resistor to burn up. Prolly a shorted semiconductor on the board.
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Old 12-08-2011, 05:18 PM   #13
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need to identify a part from my outdoor lights


Quote:
Originally Posted by zappa View Post
A relay wouldn't cause that resistor to burn up. Prolly a shorted semiconductor on the board.
Most likely one of those zener diodes is faulty,
Which means the current limiting resistor copps
the full rail voltage across it !
Or it could be a case of marginal power rating
of the resistor.(very common in cheap equip')

What are the numbers on the diodes ?
(the glass beads)
This will tell what there voltage is !
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Old 12-11-2011, 06:59 AM   #14
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need to identify a part from my outdoor lights


I am not home but will look that up asap tommorow.
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Old 12-13-2011, 09:09 PM   #15
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need to identify a part from my outdoor lights


One of the bigger ones is 1N4742A

1n474 is all i can read but on the one in the pic but, i think it is also 1N4742a also.
I have been doing some testing and it seems like whatever i lost has made it so i donít have the low voltage in the circuit. The chip LM324N does not have the required power. It appears that the circuit is working off of AC current and does not change it to dc that i can tell unless thatís the part I have lost.

Thoughts? I am bound and determined to get this figured out because itís a challenge.

Thanks for the help any new ideas would help.

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