How do you stress all such 1206 devices , safely, to check if there are others similar, without causing the damage being sought?
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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In main body of board , not been dropped or abused in use I desoldered it and it is failure of the bond between the resistive film and one of the lands but no crack in the body in the sense that it holds together in normal handling.
I have a small adjustable automatic centre punch (spring loaded ratchet release for easy centre popping of sheet metal). The minimum imulse setting of that is 9Kg but found a couple of much weaker springs to try inside . one gives range 1.5 to 2 Kg before the impulse, the other 2.5 to 3Kg range of adjustment.
I was thinking of pinging at the 1.5Kg setting on all the 3K9 SM Rs on the board after DVM checking and then DVM after pinging. Any opinions ? Probably about 6 to 10 of that value on the board
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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1.5Kg sounds worse than it is. Trying on the back of my hand is not painful or self-mutillation.-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
Your skin isn't brittle ceramic, either.
-- Sig file? I don't need no steenkin sig file!
painful
Pinged, at 1.5Kg, the 7 Rs of that value, on the side rather than top as that messed up the printing. No resistance variation before or after but if it bounces back then I know what to check first. The owner could not believe how tiny the miscreant was, lost in a minigrip bag.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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