Troubleshooting - Nuvo Concerto NV-I8DMS User Manual

Troubleshooting

Symptom
When the Display Pad is plugged in there is a
loud pop through the speakers and the keypad
does not work.
Display Pad indicates a "Net Error 1".
All the Display Pads change when a source is
selected on only one.
With the Display Pads plugged in, the POWER
light on the front of the amplifier will not turn
on.
The IR repeater does not properly control the
audio source equipment.
Display Pad is turned on, but the zone has no
audio output.
The audio output is very sporadic.
IR control is very unreliable, but the IR emitter
flashes when a command is issued.
Probable Cause
Improperly wired Cat-5 cable.
MPU is not properly communicating with the
Display Pad.
That Display Pad is set as a master, or one of
the Source Group boxes is checked in the
Configurator software zone setup.
One or more improperly wired Cat-5 cables.
One or more of the IR emitters are not properly
placed over the IR receiver on the audio source
equipment, or the IR output on the Concerto
does not correspond with the audio source
equipment you are controlling. A third possibil-
ity is that the IR pass-through is turned off in
the software configuration of the system.
A dead short in the speaker line, the zone is
muted, the source selected is not in play mode,
or the speaker wire has become disconnected.
The speakers are defective, or there is less than
a 4-ohm (two pairs of 8-ohm speakers) load on
the amplifier.
The equipment IR is not set to operate at the
system's default 38khz modulation.
32
Remedy
Check that you are using the 568A-wiring stan-
dard. (See section I: Crimping Cat-5 Wire). It is
also recommended that you use a Cat-5 cable
tester to verify that all the connections are
good and communicate properly.
Double check the wiring, or replace the MPU
board.
Check the Display. If the word MASTER appears
in red, then the master mode needs to be turned
off using the "Menu/Hot Key". Check the source
grouping status in the zones tab of the
Configuration.
Make sure the amplifier is turned on. Test that
the POWER light on the amplifier turns on
when the Network cable is unplugged. Next
unplug all the Cat-5 cables from the EZ Port
and plug them back in one at a time until the
bad cable is discovered.
Reposition the LED end of the emitter on the
face of the source equipment, so it is flashing
directly over the IR receiver. Make sure that the
emitter plugged into IR Output #1 is actually
going to source #1, and so on for sources 2-6.
Also, check the configuration. It is possible to
turn the IR pass-through function off for any
zone.
Correct the short on the speaker line. Check the
Display Pad status for mute. This will appear in
red letters at the top of the display. Make sure
the selected source is turned on and in play
mode. Check the speaker wire connection at the
amplifier.
The amplifiers have a protective circuit on the
output. Over exerting the amplifier with an
ohm load below 4 ohms, or a partial short creat-
ed by defective speakers will cause the amplifi-
er to go in and out of protect mode. Try discon-
necting the speakers one at a time to see if the
symptom goes away. If you are using more than
one pair of 8-ohm speakers, it may be necessary
to utilize additional amplification.
Go to the IR Library in the Configuration, and
delete the source. It can then be relearned
using the IR interface box and a new frequency
carrier can then be assigned.