Preparing For Projection - Siemens 2000 Service Manual

Preparing for projection
Place projector with sound head unit on the
amplifier in such a way that the control
panels are on the same side (Fig. 1 ). The
feet of the projector are placed in matching
recesses provided in the top face of the
amplifier housing. Initially there is a distance
wPf about 2 cm between the plug term1nals
61 of the amplifier and the front edge of the
projector base. Push the projector forward
towards the terminal strips until the latch 63
snaps audibly into the recess at the back
edge of the projector base
(To unlatch, depress button 64).
Before inserting the plug of the supply
cable of your 2000 sound projector in the
mains socket, check the voltage and type of
current of your mains supply. You will fmd
the relevant information on the electricity
meter. The sound projector may only be
connected to A. C.-mains (-). The series
resistance in the projector should corre-
spond to the selected lamp and the supply
voltage available. Set the voltage selector
(Fig. 3) on the top surface of the amplifier
accordingly. If the value indicated on the
voltage selector does not correspond to
the mains voltage, its setting must be alter-
ed. To do so, first unscrew the fuse element
a. Then pull the contact ring b from its
holder and turn it until the figure appearing
in the lateral cutout corresponds to the mains
voltage. Before re-inserting the fuse ele-
ment, check whether the fuse has the ap-
propr1ate rated value A 200-mA fuse is
suitable for 220 to 240-V supply voltages
while a 400-mA fuse is intended for 110 to
130-V supply voltages. A replacement fuse
will be found on the underside of the ampli-
fier.
Owing to a special overvoltage protection
device, incorrect setting of the voltage
selector will not result in an undue increase
of the transistor operating voltages and the
attendant destruction of the transistors. Ref-
erence is also made to the remarks on pp
3-6 of the main instruction manual.
To connect the loudspeaker, uncoil the
cable provided in the carrying case and
connect the plug with socket 74 of the
amplifier. Place the cable in such a way
that nobody can trip over it. Do not place
the loudspeaker behind the projection
screen but arrange it in a somewhat raised
position, adjacent to the screen. Any port-
able loudspeaker supplied for use with
Siemens sound projectors may be used,
except No. Sf L 6. 1.
When using any other make, make sure that
the unit employed is a 15-ohm loudspeaker.
If you wish to fill projection intervals with
music from records, connect your record
player to the socket 66. A low- impedance
microphone may be connected to socket
65.
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