Alesis quadraverb Service Manual page 19

caution when examining the output of comparator (U8). Accidentally shorting pins 7, and 8 together
will instantly result in a dead ASIC. Other than there, and in the power supply, you really can't do any
harm with a scope probe, so explore.
The Curtiss VCAs (U5, and possibly U6), are current driven devices, so don't expect to see
any signals from these chips on a scope.
Be on the watch for user error. (i.e.,if a user complains that it won't load from a DataDisk,
check to be sure that "SYSEX ENABLE" is turned on.)
Remember to install ALL of the latest revisions, before returning the unit. This can help
prevent many unhappy returns.
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Alesis QuadraVerb Service Manual------ 13 08/13/04