HHB Circle 5A, Service Manual

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Version 1d: 01.99
Page
Removing the Circle 5a active module from the cabinet
It is absoluletely essential that before removing
the module you have the necessary tools, a
clear space, and sufficient uninterrupted time to
work. Rushing leades to mistakes, and mis-
tekes can be dangerous and impair the excel-
lent performance of your Circle 5a speakers.
Ensure that the mains supply is disconnected
and removed from the module, and is not
reconnected until the module has been fully
refitted.
Please cover your work bench with s soft mate-
rial to protect the underside of your Circle 5’s
from scuffing during removal/replacement of the
module. Also be aware that the module is
heavy and that once the screws are loosened,
it will tend to drop downwards, and that the
heavy aluminium panel of the module will readi-
ly chip the softer wood of the cabinet, exposing
the white MDF board under the black paint.
You will need one two screwdrivers:
1. A 3.0mm cross head screwdriver of the
‘Superscrew’ or ‘Pozidrive’ NOT Phillips type.
The Superscrew type has 4 thin grooves into
which the Superscrew screw driver securely
locates. If the Phillips type is used, the screw-
driver will ‘mash’ the heads, and then it may not
be possible to remove the module from the
cabinet.
2. A larger size (M4, 4mm, No.2) ‘Superscrew’
or ‘Pozidrive’ screwdriver.
Removing the screws
Please follow these instructions exactly. Failure
to do so may well destroy your cabinet and/or
module.
First, using your smaller Superscrew driver,
check that the screwdriver makes a positive fit
to the screws marked 1,2,3,4. Applying as little
force as necessary, unscrew (anti-clockwise)
the four corner machine screws in the order 1,
2, 3, 4.
These screws locate in metal inserts trapped in
the inside of tha cabinet, and the alignment of
the module and the cabinet is precise.
Then, using the larger screw driver, remove the
screws A, B, C, D, E and, as you loosed screw
F, expect the module to drop down. Be ready to
catch it!
The module can then be removed a short dis-
tance from the cabinet, as the internal connec-
tions to the module are on short flexible wires.