Identifying Blue Component in 20-Year-Old Rare Automobile Display Unit

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#1 21672112 03 Aug 2014 12:48

Roger Meyers Roger Meyers

Anonymous

Post #1
21672112 03 Aug 2014 12:48

Hi All, I am servicing this display unit from a 20 year old rare automobile. No documentation. Can anyone tell me what this blue component is? It reads open ...No resistance or capacitance. Thanks...
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#2 21672113 04 Aug 2014 18:48

Neil Mula Neil Mula

Anonymous

Post #2
21672113 04 Aug 2014 18:48

Hi Roger,

Have you tried to measure if there is an inductance or try the lowest possible value of resistance?

Probably it came from a country that develops their own tech. components.

Can you provide a top image of the entire part?

We need to see the components connected or near that blue component.

God Bless.

Best,
Neil
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#3 21672114 05 Aug 2014 03:34

Rohit Dubla Rohit Dubla

Anonymous

Post #3
21672114 05 Aug 2014 03:34

Hello Roger - that part looks like a ceramic resonator or crystal. Also the way it is connected seems to me that it is part of the clock generation scheme for the large chip close to it.

If the circuit is functional at all, scope the terminals of the blue part and see the waveform. If its anything like a square or triangle or sawtooth wave, it most certainly is a resonator or crystal.
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#4 21672115 05 Aug 2014 08:11

Todd Hayden Todd Hayden

Anonymous

Post #4
21672115 05 Aug 2014 08:11

Rohit is right, that is a ceramic resonator.
#5 21672116 05 Aug 2014 22:55

Todd Hayden Todd Hayden

Anonymous

Post #5
21672116 05 Aug 2014 22:55

By the way, to not mechanically restrain that component in an automotive application is criminal. A blob of RTV or hot-glue at a minimum.
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Identifying Blue Component in 20-Year-Old Rare Automobile Display Unit

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