McIntosh MC 2250, Owner'S Manual

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SYSTEM TEST
The MC 2250 contains a new automatic test cir-
cuit. Each time the amplifier is turned on, an LED
digit illuminates to indicate which test is being per-
formed. Starting with the numeral 7, it makes the re-
quired measurement and verifies if it is within toler-
ance by flashing the green Power Guard lights. It
then counts down to six, performs and verifies the
next test, then five, four, three, etc. until it reaches
" 1 " and then the speakers turn on. A "beep" tone is
heard each time a test is performed. If a circuit
should fail, both red "limit" lights will come on and
the sequence will stop at that point. Speaker turn on
will not occur until the fault has been corrected;
thereby protecting your system from further dam-
age.
There are two user switches associated with the
auto test circuit. They are located on the amplifier
top panel. One switch controls the speed of the
countdown (SLOW or FAST). The other controls the
presence of the beep tone (ON or OFF).
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