Operation Manual
I-Tech HD DriveCore Series Power Amplifiers
page 44
I-Tech HD DriveCore Series Power Amplifiers
Operation Manual
page 45
8 Troubleshooting
“Off/Flashing/On” means that the
LED can be off, or flashing, or on.
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.
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.
8 Troubleshooting
CONDITION: No sound, even though
the amp has power.
Power LED is on with-
out flashing and the amp is receiving an input
sig nal. Signal indicator is on or flashing.
POSSIBLE REASON
• Speakers not connected.
• Open circuit due to speaker failure.
• Ready LED is off. Channel has been set to
standby mode via the software.
• Amplifier is in blackout mode. Press or
turn an Encoder to reactivate the LCD
display.
CONDITION: No input signal.
Signal
indicator is not flashing even though audio is
applied, and the channel is ready.
POSSIBLE REASON
• Input signal level is very low.
• Another source is selected or routed.
CONDITION: Data indicator not flash
ing, even though host computer
software is active.
POSSIBLE REASON:
• Cable between computer and amplifier is bro ken
or not connected.
Note: Data indicator flashes only when the amplifier
is polled for data, or is polled to see whether it is
online.
CONDITION: Yellow LINK ACTIVITY indicator in
Ethernet connector does not illuminate or flash.
POSSIBLE REASON:
• Ethernet link is broken.
CONDITION: Computer does not communicate with the
network devices.
POSSIBLE REASON:
• Incorrect wiring. See Section 3.5 letter O on network wiring.
• IP Addressing is not done correctly. Use the Network Troubleshooting
Wizard in System Architect.
• There is a short on the amplifier output. First
disconnect your speakers from the affected
channel(s) one by one to determine if one of
the loads is shorted.
CONDITION: COND indicator is off.
POSSIBLE REASON:
• There is only one conductor allowed per network system. This
indicator is lit only when the amplifier is the conductor.
• Amplifier is in blackout mode. Press or turn an Encoder to
reactivate the LCD display.
