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- Jan 21, 2010
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- 25,510
That's in the diode test function setting.
In opposite direction is open.
Excellent. So you can determine the common connection, and whether they're common anode or common cathode?
It looks like an SOT-23 case (but verify that yourself) Then get some dual diodes in this package. Their voltage rating should be at least twice the voltage for the relay coil, and they should be rated for a current several times the operating current of the relay coil. I suggested a BAW-56 (I think) preciously.
Be very careful because these dual diodes come in several internal configurations and you need the correct one!
D23 is also obviously a diode. However I can't tell if it's a normal diode or a transient suppression device. Either is possible in this location and size of package. Given that the anode is connected to 0V, I'd grab a meaty rectifier (several amps, 200V)? may not be quite right, but should allow you to run tests.
It may be worth while reading the resistance across the relay coils after you remove the obviously damaged diodes. There is at least the possibility that they may also have been damaged.
It's supposed to be pdfcast.ORG
Damn! Sorry about that.