Pioneer XY series Installation Manual page 58

5 Drive unit replacement
__________________________________________________________________________________________________________
Procedure (XY-81/101)
Removing and reinstalling the grille.
(1) Remove the four socket head bolts from the grille.
(2) Remove the grille from the enclosure.
(3) Reverse the above steps when placing the grille back to the
enclosure. The grille should be placed back in the same orientation
before it was removed.
Replacement of HF drive unit
HF waveguide/HF driver unit installed in XY-81 and XY-101 are the
same, so almost the same procedures should be taken to replace
them.
(1) Remove the four socket head bolts from the HF waveguide.
(2) Lift the waveguide up and remove the cables from the HF drive unit.
(3) XY-81: Remove the two packing from the inside of the horn. Insert
an hex key into the two slits appearing after the packing was
removed and remove the two socket head bolts from the HF drive
XY-101: Remove the two nuts from the HF drive unit with a 10mm
Spanner.
(4) Replace the HF drive unit with a new one and tighten the socket
head bolts or nuts.
Only XY-81
NOTE: Ensure that the packings are firmly attached to the slits using
elastomeric adhesive, otherwise sound quality may be deteriorated.
(5) Connect the cables to the two terminals.
Red Terminal (+)
Black Terminal (-) : Yellow cable
(6) Install the HF waveguide to the enclosure.
(7) Tighten the four socket head bolts on the HF waveguide.
Make sure to place the HF waveguide in the same orientation as
before replacing the drive unit.
: White cable
NOTE: XY-81 is used in the pictures.
Only XY-81
Only XY-101