EM Acoustics HALO bi-amplified line array system - Manual (Page 30)

Page 30 of 39
HALO system User Manual
V2.2 August 2010
6.0 - Servicing Information
All HALO components can be removed for service purposes if required, using the minimum
of tools.
Removing LF Drive Units
1. Place the enclosure on its back and remove the two screws on each side securing
the grille in place. Gently lift the grille off and set to one side.
2. Remove the four socket-head machine screws holding the LF drive units in place.
Gently lift the drive unit approximately 6” out of its recess, disconnect the cables
and the driver can now be fully removed. Please make a note of drive unit polarity
for future reinstatement.
3. To re-install the drive unit, re-connect the cables observing the correct polarity and
then seat the drive unit in its recess. Re-instate the machine screws and re-tighten
– being careful not to overtighten.
Removing the MF Drive Units
1. Follow step 1 above to remove the front grille.
2. Carefully remove the four machine screws securing the MF drive unit in place.
NOTE: Be aware when working on one MF unit, not to damage the surface of the
other unit. The use of short Allen keys is recommended. Once the machine
screws are removed, lift the drive unit from its recess, disconnect the cables and
the drive unit can be removed.
3. To re-install the drive unit, re-connect the cables observing the correct polarity and
then seat the drive unit in its recess. Re-instate the machine screws and re-tighten
– being careful not to overtighten.
Removing the HF Drive Unit
1. Follow step 1 above to remove the front grille.
2. Follow Step 2 above to remove the left-hand MF drive unit (when looking at the
front of the enclosure) as described above.
3. Remove the cylinder of acoustic wadding in the MF drive unit chamber to gain
access to the terminal block which secures the cables for the HF drive unit. Using
a small flat-blade screwdriver, loosen the screws securing the red & blue cables for
the HF drive unit and remove these cables. Carefully remove the silicone sealing
compound around the hole for the HF drive unit cables.