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Old 17th June 2005
Gear Addict
tmarra's Avatar

If all the meters are doing the same thing then it must be something to do with the power supply voltages. If I recall (and this is going way back in my memory bank) Soundcraft uses +/- 7.5VDC to run the logic IC's and +24VDC to actually power the LED's. The IC's you swaped out are powered from the Audio Supply (+/- 18VDC) and should have nothing to do with the problem your having.

I'd check to see if your getting the +/-7.5VDC at the meter bridge IC's before changing any IC's. I think you may find you lost one of those voltages.