No Power

[WWNF911]

That is NOT good.

I just checked my LE and I don't get shocked by it.

(HeeHaw)

"Hey Doc, it hurts when I do this!"   "Well don't do that!"

[WWNF911]

Need to double check the orientation of the transformer. Can't tell based on pics.

Rick we need to come up with a different procedure for soldering the triacs. The way it is now you simply end up with a lot of cold solder joints on the center posts as you see here. This is because it's hard to reach temperature atfer the heatsink is installed. Perhaps run the screws only to line up triacs and tac one leg only the remove the heatsink finish soldering and then re-install the heatsink.  What do you think?

Leon

[vairmoose]

On several of the TRIACS, it appears that there is little to no solder at all on the middle leg.  This probably relates back to the thought about trying to solder the triac while the heat sink is attached.  I'd suggest removing the heat sink, touching up the solder joints on the triacs .   Test the board without the heat sink attached.   If all is well, clean up the back of the board by nipping all of the legs (all components)  then reattaching the heat sink.

WHen running with power, recommend that you have the LE sitting on a non-conductive material. 

Larry

(edit)...   after re-reading the posts here and looking closer at the pics of the back of the board, I found/see some very shiny spots on the board surface between the big ground plane and the pins for the output.   Check the board closely for any dollups of solder that should not be. 

[WWNF911]

The LE is capable of LOTS of current. As such it has some traces that are quite large. The one attached to the middle leg of each triac is one of these. Just removing the heatsink may not be enough to allow a proper solder joint. You may want to increase the temp. on the soldering station if you have one to accomplish this. If you don't have a soldering station, now might be a good time to consider getting one.

Leon

[WWNF911]

On the last (4th) pic there's some yellowish haze on the board in the lower right quadrant. Did something happen to cause this?

Did you check the orientation of the transformer, triacs and the voltage regulators?


Leon

[wbe12345]

tigman

Are you still getting shocked from the heat sink???



Wallace

[Tigman009]

No, I didn't plug it it with the LE on the static bag.  I will have to re-solder it sometime this weekend as work is crazy.  Thanks for all of the tips.  I will try and include some better pictures now that I have figured that out.

[Tigman009]

more pics...hope this helps

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