Roadie dropped it off the stage , in flight case, worked fine for another
gig and then next time worked for 3 seconds.
Sheared metal internal braces and choke looks decidedly drunken, almost
sheared off, but all big lumps test cold ok so far.
Could someone confirm that the 1W resistor R188 on the HT ac input should be
2.2 ohm ? Its not charred or any other indication of excess heating but I
find the colour bands a bit confusing as red,red, gold,gold, white and is
nowhere near 2 ohms now. Bit difficult to tell whether it is gold gold or
silver silver bands until I disconnect the board and can get a better view.
Is it a possible scenario that this R failed mechanically, but only
partially, in the shock loading ? without any undue current loading/heating.
Back-line manager swapped the o/p bottles with another amp and they
functioned ok in the other amp and the speakers are ok.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/