Appendix D: Troubleshooting - Electro-Voice EVID 12.1P User Manual

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Appendix D: Troubleshooting

Guide
Problem
1. No sound
2. Poor low-frequency Speakers wired
response
3. Intermittent output
such as crackling or
distortion
If these suggestions do not solve your problem, contact your nearest Electro-Voice
Electro-Voice
®
EVID 12.1P User Manual
Possible Cause(s) Action
Amplifier Verify that that the line level signal cable’s
XLR connector has been pushed all the way
into the ‘Low Level In’ jack on the amplifier
panel. Turn the ‘Power’ switch on and the
volume up until you can hear sound emitting
from the 12.1p subwoofer. If there is still no
sound, the problem is with the line level
signal.
Line level signal Connect a known working powered test
speaker to the line level signal from the
mixer, pre amplifier or other source. If there
is no sound, check that all of the electronics
are on, the signal routing is correct, the
source is active, the volume is on and so on.
Fuse Carefully remove the fuse holder from the
power cord input with the use of a flat head
screwdriver. Inspect the fuse for any
damage. Blown fuses will typically show a
smoke-like blackening on the inside of the
glass. If this is the problem, replace the fuse
with a 4A/250V, 20mm x 5mm fuse.
Only replace this fuse with the same type
and rated fuse to reduce the risk of fire.
When two speakers are connected out
out-of-polarity of polarity (out of phase), the low frequencies
will cancel each other acoustically. Carefully
observe the wire markings or tracers on your
full-range speaker wires. Verify that their
amplifier (+) terminal is connected to the red
speaker terminals and their amplifier (-)
terminal is connected to the black speaker
terminals.
Faulty Check the low-level signal cable/XLR
connection/wiring connector to make sure that it has been
pushed all the way into the ‘Low Level In’
amplifier panel jack. If crackling persists,
remove the signal cable from the amplifier
and its low-level signal source and check for
a faulty connection between the connector
and the cable. Make sure that all of the
terminals on cable connectors have been
properly soldered.
dealer or Electro-Voice distributor.
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