Steve
GS Whisperer
I am going to try to see if I can clarify this just a bit, even though you have resolved the R/R issue and moved on.That test doesn't make any sense. It's saying to put the multimeter in the "diode test function" and then uses volts for expected readings? There are a few problems with this.
The diode test function on most meters is more of a continuity test... if there's "continuity" (typically defined as resistance below an arbitrary threshold) between the two test leads, then beep. Otherwise, be silent. My meter shows the readings in ohms (I believe yours does as well), but assuming that some meters show it in volts, there's the additional wrinkle that different meters use different batteries.
If you use your meter in the OHMS position to check a diode, you will get a reading of the resistance in the diode.
In one direction, you will get a reading. What that reading is, will depend on the specific composition of the diode, but will be consistent with other diodes of the same type. If you reverse the leads, you will get an "out of range" indication. Some meters show this with a "-1-", others with "-OL-", but it will not be a meaningful number.
If your meter has a DIODE FUNCTION, the reading that it gives you is in VOLTS.
That voltage is the 'breakdown voltage' of the diode. Much like the resistance test mentioned above, there will be a reading (probably just over half a volt) in one direction, and when the leads are reversed, there will be an 'out of range' indication.
The readings that you got earlier, which ranged from 620 to 670, were actually millivolt readings, meaning that they are 0.620 to 0.670 volts. Those are all within the range of "just over half a volt" and are consistent enough with each other to be valid readings. If you were to find one of 420, say, it would be highly suspect. You found some bad readings, and they confirm that the RECTIFIER portion of the device is, indeed, bad.
And, ... the fact that "different meters use different batteries" means absolutely NOTHING.
They are all going to have enough battery power to do their job, so type (or quantity) of batteries is totally irrelevant.
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