Tubehead - Horizontal Drifting
032-0207-EN Rev 0
3-2
Adjustments
Tubehead - Horizontal Drifting
The Tubehead will drift from the correct horizontal position if the four hex
locking nuts are not adjusted properly. This can happen when the supplied 8"
(20 cm) cone is replaced with the longer, heavier 12" (30 cm) cone.
Note! The adjustment of the four hex locking nuts does not lock the Tubehead in
place but provides proper friction to allow the Tubehead to be rotated and
then to remain in the position to which it has been rotated.
1. Turn OFF the power switch.
2. Disconnect the external power source:
– FOR A SYSTEM WITH A LINE CORD (120 V ac only), unplug the
line cord.
– FOR A HARD-WIRED SYSTEM, disconnect the mains supply
(external power source) and use a meter to verify the mains supply is
disconnected.
3. Unscrew the two screws on the Tubehead Yoke Cover Plate, using a
2.5 mm Allen wrench and remove the cover plate from the underside of
the Tubehead yoke. (It may be necessary to position a thin screwdriver
at the base and gently pry off the cover.)
Figure 3-1 Removing the Tubehead Yoke Cover Plate
(Continued)
Tools Required: 2.5 mm Allen Wrench
4.5 mm Hex Wrench
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