On Fri, Feb 28, 2025 at 05:29 AM, R. Maris wrote:
In my case, D4 seems not to conduct current at all. My diode test (DMM, applies 2.5V open voltage) does not show any diode voltage, regardless the direction. Perhaps, it's a bidirectional zener device with over 2.5V threshold in both directions.
The diode however is soldered, but it is a bit side tilted. What type should I use as replacement - if the diode is defect (abnormally not as short).
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It's a varistor diode and unless it fails shorted or high resistance, you can't test it with a DMM.
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Entering "diode" in the search box at the top of this page produces a message result that includes the following front-end components, which are commonly prone to failure:
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CG0402MLU-05G, ? ESD Protection Diode
AS179-92LF,? ? RF Switch
BGA2817,? ? LNA
PE4312C-Z,? ?Attenuator?
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Herb
