Turbosound TQ-440 - Manual (Page 14)

user manual
QLight    series
TQ-440 manual
page 14
Maintenance
If one of the drive units in the cabinet should cease functioning and needs a replacement recone or
diaphragm you are advised to remove the faulty unit from the cabinet and send it to a professional
recone service authorised to recone Turbosound loudspeakers. This will ensure the continued high
performance of your TQ-440.
Removal of the 12”/1” driver
1. Unscrew the eight countersunk screws from the two vertical battens which hold the protective
grille in place. Be careful when removing the grille as it is under tension and may spring
outwards when released. Set the battens, grille and fixing screws aside for later re-assembly.
2. Undo the eight M6 x 30mm Allen head bolts holding the driver in place and carefully pull it
out and away from the cabinet. WARNING - This unit is heavy! You will notice that the 1” high
frequency driver is attached to the back of the 12” low frequency driver by its screw adapter.
Disconnect the cables from both HF and LF units and completely remove the driver assembly
from the cabinet. Make a note of the driver polarity for later reconnection.
3. Separate the drive units by unscrewing the high frequency driver anti-clockwise and lift it
away from the low frequency driver. Depending on which section needs servicing, the
appropriate drive unit should be returned to an authorised Turbosound service centre.
4. To reinstate the drivers, simply reverse the above procedure making sure you observe the
correct polarity when reconnecting the cables back into the terminals of the drive units.
Removal of the midrange drive unit
If the midrange drive unit requires maintenance, it will first be necessary to remove the rear panel.
The midrange driver is held in place by a M10 x 25mm bolt through the rear of the cabinet into the
back plate of the drive unit behind the rear panel. Once this is released the midrange horn and
drive unit assembly can be removed.
1. Remove the # 10 x 1 ½” countersunk woodscrews securing the rear panel of the cabinet. The
M10 bolt securing the midrange driver will now be accessible in a recess in the enclosure rear
panel. Using a 17mm socket, unscrew the bolt and set aside for later re-assembly.
2. Unscrew the eight countersunk screws from the two vertical battens which hold the protective
grille in place. Be careful when removing the grille as it is under tension and may spring
outwards when released. Set the battens, grille and fixing screws aside for later re-assembly.