Precision Power DCX 300.4 - Manual (Page 28)

through the lower intake vents on the endplate. This cool air flows
below the circuit board, through the fan and across the internal fins,
cooling the heatsink. The warm air is then forced out through the
upper end-plate exhaust vents.
AP-IV PROTECTION CIRCUIT
Short Circuit Protection engaged: The DCX amplifiers will turn off
and try to come back on immediately (the Short RED LED will
illuminate). The amplifier will cycle like this indefinitely with “blips” of
sound each time. If this is the case, check your speakers and wiring
for low impedance and short circuits.
Thermal Protection engaged. The DCX amplifiers will turn off and
after a minute or so will come back on (the Thermal RED LED will
illuminate). In this case, ensure that there is nothing blocking the
normal convection airflow of the amplifier. No obstruction should be
within 2” of the amplifier on all sides.
Note: Low battery voltage will cause the amplifier to run
warmer and possibly damage the amplifier.
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