Troubleshooting - Crown CTs 1200 Operation Manual

CTs Power Amplifi ers

6 Troubleshooting

Operation Manual
CONDITION: Power indicator is off.
POSSIBLE REASON
• The amplifi er has lost AC power.
• The amplifi er's Power switch is off.
• The amplifi er is not plugged into the
power receptacle.
• The amplifi er output level is so high that
the power supply fuse has blown. Verify
that input levels and output impedances
are within safe ranges. Refer the unit to
an authorized Crown service center for
fuse replacement.
CONDITION: Power indicator is
fl ashing.
POSSIBLE REASON:
• The AC line voltage has dropped below
10% or has risen above 10% of the
nominal line voltage of the power supply.
Refer to section 5.1.6 for specifi c voltage
requirements.
CONDITION: Fault indicator is on.
POSSIBLE REASON:
• The amplifi er channel has stopped
oper ating. Return the unit to an
authorized Crown Service Center.
CONDITION: Distorted sound.
POSSIBLE REASON:
• Load is wired incorrectly or Dual/Bridge
mode switch is set incorrectly. Check
both.
• Input is overloaded by a signal level that is
too high. Turn down your amplifi er level
controls, or turn down the input sig nal,
until the clip light goes out.
• Thermal Level Control (TLC) is active.
Note: If the signal sounds distorted even
though the Clip LED is off, the input signal is
distorted. Check gain staging and output
lev els of the mixer or preamp.
page 45