Leslie 860 rebuild

[martyblackeye]

Hello! So I'm working on a leslie 860 power circuit board and after testing all of the diodes, Ive found that many of them arent working correctly! D10,11,14,16 all have give me 0V and my multimeter gives me the continuity tone with my probes on both sides of the diode and when i switch sides. D12, D15, D17 give me OL on the multimeter and no continuity tone. Where can I go to replace these diodes?

I know it's possible that this could have so much failure, but is it likely? As Im checking each diode Im amazed at how each of them doesn't work! I have found a few that do past the diode test, so I know I'm checking correctly.

Let it be known that the serial number is 14012, model 860 leslie. Not everything on this leslie correlates to the service manual. for instance, D18 is none existent. solder points are there, but they're cleanly covered and doesn't look like there was any foul play with the circuit board.

Ill send pics if that helps!

[enor]

Hello! So I'm working on a leslie 860 power circuit board and after testing all of the diodes, Ive found that many of them arent working correctly! D10,11,14,16 all have give me 0V and my multimeter gives me the continuity tone with my probes on both sides of the diode and when i switch sides. D12, D15, D17 give me OL on the multimeter and no continuity tone. Where can I go to replace these diodes?

I know it's possible that this could have so much failure, but is it likely? As Im checking each diode Im amazed at how each of them doesn't work! I have found a few that do past the diode test, so I know I'm checking correctly.

Let it be known that the serial number is 14012, model 860 leslie. Not everything on this leslie correlates to the service manual. for instance, D18 is none existent. solder points are there, but they're cleanly covered and doesn't look like there was any foul play with the circuit board.

Ill send pics if that helps!

Are you measuring them in circuit? Keep in mind there might be other continuity paths from one side of a diode to another than thru the diode.

[jdoc]

Are you measuring them in circuit? Keep in mind there might be other continuity paths from one side of a diode to another than thru the diode.

I had the same thought, you have to isolate them, hard to believe that many would fail, seen this mistake a lot at work on machinery using diodes, usually turned out to be something else when tested properly

[David Anderson]

I can often test diodes in circuit using the diode test mode on my Fluke digital multimeter. You should get a standard diode drop (0.5 - 0.7V) in one direction and an open circuit in the other.

hard to believe that many would fail

The thing about the diodes (and many of the parts in SS Leslies) is that they used the cheapest parts they could find, so I have seen more diode failures in these than one would expect. Diodes are cheap, anyway, so one can hardly go wrong replacing them unless you're a butcher with a soldering iron.