Electronics > Repair
SMD Component Identification Help
Testtech:
Greetings,
I am working on an RF circuit and have encountered SMD components that I do not recognize. Please see the picture. I have outlined the four parts in question.
They have white translucent bodies, no marking other than the partial black band.
Resistance measured across these varies, and I suspect that the reading are from other circuit DC paths. I suspect capacitors.
Does anyone know for certain?
Thank you!
fzabkar:
The unmarked ones look like chip inductors. If so, then they should measure close to zero ohms.
Testtech:
I don't think they are inductors, as some measure in the 1000's of ohms, and other do not.
fzabkar:
Precision resistors?
Testtech:
fzabkar,
You are correct, these are inductors!
I am in the process of working out exactly what is going on. Some of these components have clearly failed open circuit. Unfortunately, there are no value markings, so I am not sure how to estimate the correct values.
Some are in the signal path, (3-4 GHz), others seem to be bias filters for the transistor gain stages.
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