Manuel,
?I hope I have as good luck as you did. My (2nd) QMX left the smoke out from the same 5 V p/s board. For me it destroyed C107 and Q108. The Zener doesn't quite seem right, but even if bad doesn't explain C107 going up in smoke. Doing lots of tests now to see if the main board has been damaged.?
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73, Dan? NM3A
Hi Dan,
I?m not 100% sure, what was the cause in my case, so I can only guess.
But I would look at the real obvious stuff:
- I?ve shortened some of the display wires and gave them another touch with soldering iron, so it would not short to anything surrounding
- I bended the "mentioned in assembly manual" display clamp flat, that would have contact to mainboard otherwise?
- I had obvious dry solder joints on one of the filters (just pre-soldered for positioning, not heated through)
- Take special care of the short between DC in and left rotary (That should be mentioned in the manual in RED when assembly of mentioned components is advised, not just later in final check)
Hans? Tetris games are always admirable and I can?t wrap my head around how he keeps coming up with stuff like this. I love it,? but it comes at a price.
The price is: You need to check for problems 3D, no longer just 2D......
73 Manuel; DL2MAN
Manuel; DL2MAN