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Old 11-30-2009, 03:08 PM   #1
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Looks like a resistor, but isn't?


So I am having an electrical problem with a PTAC unit. I have noticed that a particular component has been cut off the circuit board. I know what the missing component looks like, but I don't know what it is.

The same component is used multiple times on the board, and I have circled it in the photograph below.
Can anyone identify what it might be?
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Old 11-30-2009, 04:34 PM   #2
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Looks like a resistor, but isn't?


D - Diode
R - Resistor
JU - Jumper?

And the "jumper" being a 0Ω resistor, marked with a single black band...
(See picture about 1/4 way down page)
http://en.wikipedia.org/wiki/Electronic_color_code
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Old 11-30-2009, 05:32 PM   #3
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Looks like a resistor, but isn't?


Ahhh, electronic color code, I was searching for electrical component color standard. Alright, that's what I needed to know, thanks for the link.
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Old 11-30-2009, 05:58 PM   #4
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Looks like a resistor, but isn't?


I would guess at jumper as well. Normally I would expect a piece of wire but this may be something to make the automated assembler robot happy. Probably can't grab just a thin wire.
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Old 11-30-2009, 06:28 PM   #5
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Looks like a resistor, but isn't?


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Originally Posted by joed View Post
but this may be something to make the automated assembler robot happy. Probably can't grab just a thin wire.
I wondering just that. I've seen plenty of boards with jumper wires.
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Old 11-30-2009, 06:41 PM   #6
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Looks like a resistor, but isn't?


Zero Ohm Resistor: Jumper. I agree with Joed. It's used instead of a wire to suit the automated board stuffing equipment.

If it weren't labeled "JU", I might have thought it could be an inductor, but it would be labeled L if it were an inductor.

If it is cut, I would leave it alone. It's probably used during test of the board only.

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