It is a 1N5822 Schottky used in the secondary side of a power supply that gets excessively hot and has a reputation for toasting capacitors. So I am thinking it is dodgy. The power supply does not work at present due to either this diode or another fault.
I am testing it in-circuit but as far as I understand the circuit, this should not be a major issue.
Tested forwards using diode mode: 0.202V
Tested backwards using diode mode: 0.365V
Tested forwards on ohms: 588Ω
Tested backwards on ohms: 489Ω (???)
Although it does have a lower forward voltage drop it also conducts backwards. And yet it has a higher forwards resistance on the resistance range. I have never seen this before. Most diodes tend to fail shorted... and never retain asymmetry after failing.
At the very least it seems leaky. I will probably replace it but I am wondering what is causing the very odd readings.
I am testing it in-circuit but as far as I understand the circuit, this should not be a major issue.
Tested forwards using diode mode: 0.202V
Tested backwards using diode mode: 0.365V
Tested forwards on ohms: 588Ω
Tested backwards on ohms: 489Ω (???)
Although it does have a lower forward voltage drop it also conducts backwards. And yet it has a higher forwards resistance on the resistance range. I have never seen this before. Most diodes tend to fail shorted... and never retain asymmetry after failing.
At the very least it seems leaky. I will probably replace it but I am wondering what is causing the very odd readings.