LRAD 500X
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other hardware or equipment that become loose may represent a serious hazard to personnel
as well as the LRAD-500X and nearby equipment.
Use non-flammable cleaning solutions with clean rags to wipe the exterior surfaces of the
LRAD-500X. The LRAD-500X Head Unit can be sprayed down with fresh water to remove salt
and dust buildup. The status LED window can be cleaned with soap and water. For corrosion
control in sea applications, apply anti-corrosion lubricant to the metal connectors on the LRAD
device.
Do not spray the LRAD-500X front grille with pressurized liquid or air. Do not spray or
otherwise introduce caustic solutions to the front grille. Doing so will increase the risk of
damaging the emitters as well as other electronics contained within the unit.
If the grille becomes obstructed with dust, dirt, dried mud, or sand, remove the grille and clean
it with soap and water. Turn the unit with the emitters facing down and wipe away any dust
and dirt that may have accumulated in the emitter cavities.
WARNING: Do not use compressed air to blow away dust from the emitter cavities, as
this may damage the emitters.
The grille on the head unit can be removed periodically by unfastening the screws around the
front bezel and cleaned using pressurized air and/or water. This operation will ensure
maximum output is maintained in the unit.
Spare parts are available from ATC and field repairs of most potential failures can be performed
as follows.
Troubleshooting and Repairs
Problem: Low output due to failed transducer.
Description: The failure of one or two transducers may not be noticeable to a listener. A
handheld dB meter can be held within two or three inches of each of the transducers, and while
playing a test tone at very low volume level, be used to find a faulty transducer.
To replace a transducer, perform the following steps.
1. Remove the front grille by removing the screws around the front bezel.
2. Remove the cap from the front of the driver bullet using a 7/64” Allen Wrench.
3. Disconnect the driver connection which is located inside the driver bullet.
4. With the drivers facing up, remove the four screws from the back of the driver using a
5/32” Allen Wrench, and lift the driver out of the unit.
5. Install replacement driver, reconnect driver cable, replace driver bullet cap and replace
front grille.
Total estimated repair time: 25 minutes.
Problem: Faulty amplifier – excessive noise, fault light, clipping light permanently
illuminated, insufficient output.
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