Rob Shire Posted September 30, 2016 Report Share Posted September 30, 2016 (edited) My workhorse SD 442 locked up after 12 years of service and all meter LEDs started pulsing. I suspected the IC chip controlling the menu functions because after tap dancing through the menu buttons the mixer seemed back, the tone oscillator worked and meters registered unity, but couldn't bring back the menu functions and as soon as I tested with mics plugged back in... back to malfunctioning, passing no audio and all LEDs pulsing. Now I can't even do that, at haven't tried and pulled out the backup (always carry a backup). NOW SUSPECT that the memory that retains menu settings is wiped or a capacitor failure. She's on the bench this morning and I don't see any telltale signs of capacitor failure, it just has the cover off and doing a blow out and visual inspection, but this is the most logical deduction I have. If anyone experienced a 442 death like this I would like to know what they think or if they had it repaired. This happened very suddenly and after 4 days of traveling on a short flight as plane side checked in a very well padded case. No choice in on a shuttle. Mine is old and has it's inputs soldered straight to the board, no ribbon cable connections, but it does have the waterproof coated boards. I know about the SD bench fee and 'm most probably not going to fix unless someone can say definitively what happened and what to do. It was serviced last year... this is just more of a post mortem exercise IMG_1406.MOV Edited October 2, 2016 by Mike Rustle Clarity Quote Link to comment Share on other sites More sharing options...
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