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Old 27th July 2008, 08:55 PM   #11
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Default 6 string reply...

That first input went quick, connector wore out in under a year. It's a pretty obvious repair/fix once you open the chasis.

As for the 5 sec. fade out - it could be a power supply issue, maybe a bad capacitor - easy check with a meter. Does sound ever return? What about if it is kept at low volumes? Does it last longer?
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Old 9th October 2008, 08:32 PM   #12
crackho is offline crackho  United States
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Default troubleshooting crate g40c

HI

i have the same amp and one day it did the same thing. just turn on with no sound ,

What i did was took it apart 4 screws and resoldered the traces, i smelled for any burnt components because if you know burnt components have a distinctive smell to them. No burnt components fortunately and just resoldering the main traces where the power comes in and the traces solder points at the input jacks, recitifier and the voltage regulators. Put it back together and it was fixed. Anyway good luck with your troubleshooting.
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Old 13th April 2009, 08:32 AM   #13
lnr241 is offline lnr241  United States
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Just need to let everyone know that I no longer have a copy of the schematic, but as Mando said, you should be able to get a copy (for free) by emailing Mackie's tech support.
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