Troubleshooting - Crown DriveCore I-Tech 4x3500 HD Operation Manual

8 Troubleshooting

"Off/Flashing/On" means that the
LED can be off, or flashing, or on.
page 44
CONDITION: Power indicator is
off and power switch is not illu­
minated.
POSSIBLE REASON:
• The amplifier has lost AC power.
• The amplifier is not plugged into the
power receptacle.
• Rear-panel breaker is off.
CONDITION: Power indicator
is off and power switch is illu­
minated.
POSSIBLE REASON:
• The amplifier's power switch is off.
CONDITION: Power indicator is
flashing.
POSSIBLE REASON
• The AC line voltage has dropped below
15% or has risen above 15% of the
rated range.
I-Tech HD DriveCore Series Power Amplifiers
CONDITION: Thermal indicator is
on.
POSSIBLE REASON:
• The amplifier is becoming too hot for safe
operation. Allow amplifier to cool. Check for
loads less than 2 ohms, and for excessive
input levels. Check for proper ventilation.
CONDITION: Fault indicator is
flashing.
POSSIBLE REASON:
• The amplifier channel has stopped
operating. Refer the unit to an authorized
Crown Service Center.
CONDITION: Power indicator is
off and power switch is not illu­
minated.
POSSIBLE REASON:
• Load is wired incorrectly or Output Mode
switch in LCD-screen menu is set incor-
rectly. Check both.
• Input is overloaded by a signal level that
is too high. Turn down your amplifier level
controls (Encoders), or turn down the
input signal, until the clip light goes out.
Note: If the signal sounds distorted even
though the Clip LED is off, the input signal
may be distorted before it reaches the
amplifier input. Check gain staging and
output levels of the mixer or preamp.
Operation Manual