Today little accident likely revealed the whole story of failure of this particular unit.
Attempt to connect chassis to 10V LO output lead to immediate 'reboot' of the unit
![WTF? :wtf:](https://www.eevblog.com/forum/Smileys/default/wtf2.gif.pagespeed.ce.pxLiY5pjs4.gif)
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Rather quickly the culprit was found, it was a battery pack:
![[#3300] Wavetek 7000, the hidden gemstone.](https://www.eevblog.com/forum/index.php?action=dlattach;topic=112226.0;attach=1269877;image)
One of bolts that keep this battery pack shorts single cell to chassis, depending on how it was screwed and addition al unit movements.
Thus, initially burned 1 ohm resistor was likely the consequence of doing the same what I did, but for a longer period of time. Could you imagine, this little mechanical issue lead to whole this story
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
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