Installation manual

Community S-Series - Operation and Installation Manual - Page 55
SERVICING S-SERIES LOUDSPEAKERS
Servicing a S-Series loudspeaker is straightforward and easy. All drivers are serviceable by removing the
screws that attach the protective grille to the front of the enclosure. The crossover is serviceable by
removing the input panel on the rear of the enclosure. There are no other user-serviceable parts.
TROUBLESHOOTING GUIDE
Should you have a problem with your S-Series loudspeaker(s), find the symptom and follow the associated
“What To Do” instructions below. Be aware that a particular symptom may have several possible causes.
SYMPTOM PROBABLE CAUSE WHAT TO DO
High distortion, low
output, or no output
from any or all
drivers.
Faulty connection to the
loudspeaker.
Possible solder joint
failure on crossover
card.
Using an ohmmeter, check the continuity of the wiring
to the loudspeaker. If the wiring is OK, remove the
input panel and check all solder joints on the
crossover and the wiring to the drivers. Visually
inspect solder joints as cold joints may only
malfunction under high current. Repair as needed.
Distortion from the
loudspeaker at higher
volume levels.
Too little amplifier
power.
If the power rating of the amplifier is too low, it will
clip at higher volume levels. Reduce the volume level
or use a more powerful amplifier.
Distortion from the
loudspeaker at
moderate to high
volume levels.
Driver is
malfunctioning.
Using a sine wave oscillator or wide range program at
moderate levels, listen to each driver to isolate the
problem. Replace as needed.
In BI-AMPLIFIED
mode bass is weak or
non-existent, and
highs sound
"muffled".
Wiring for LF and HF
sections is reversed
from electronic
crossover or amplifier.
Check wiring from crossover to amplifier, and
amplifier to loudspeaker. Make sure the HF amplifier
channel is connected to the HF driver and the LF
amplifier channel is connected to the LF driver.
Low or no output
from the low-
frequency driver.
Low-frequency driver,
crossover, or amplifier
is malfunctioning.
Test and replace as needed.
Low or no output
from the low-
frequency driver.
Mis-wired NL4-
compatible locking
connector.
Check wiring and correct as needed.
Low or no output
from the mid-
frequency driver
(applies to 3294 and
3594 only).
Mid-frequency driver,
crossover, or amplifier
is malfunctioning.
Test and replace as needed.
Low or no output
from the mid-
frequency driver.
Mis-wired NL4-
compatible locking
connector.
Check wiring and correct as needed.
Low or no output
from the high-
frequency driver.
High-frequency driver,
crossover, or amplifier
is malfunctioning.
Test and replace as needed.
Low or no output
from the high-
frequency driver.
Mis-wired NL4-
compatible locking
connector.
Check wiring and correct as needed.
Low volume level. System gain is too low. Check to make sure that the audio signal to the
amplifier is high enough to drive it properly. Check
all volume/level controls and gain switches in the
system including the amplifier input attenuator.