Crown DriveCore I-Tech 4x3500 HD Operation Manual page 45

I-Tech HD DriveCore Series Power Amplifiers
8 Troubleshooting
Operation Manual
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.
• 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.
• 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 broken
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: 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.
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.
page 45