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2.2.2 Multi-Voltage SDU4
OPEN THE
DOOR
SPARE FUSE
(UPPER)
FUSE
ACTIVE
FUSE CARRIER
(LOWER)
FUSE
OCTAGONAL PEG
ROUND PEG
VOLTAGE SELECTOR
WHEEL
A2F4037
Figure 2.3 Fuse compartment, multi-voltage unit
Open the fuse compartment door in the AC mains input connector with a small
flat blade screwdriver (see Figure 2.3), and check that the fuse has the correct
rating. If necessary, rotate the selector drum until it displays the correct voltage
for the installation. (The drum may also be removed and replaced in the desired
position. It will only fit one way around.) Snap the fuse compartment door
closed .
For 85 to 132 Vac use 500 mA 1.25" slow-blow fuse.
For 187 to 264 Vac use T250 mA 20mm time-lag fuse.
2.3 Audio Connections
The SDU4 has been designed to interface with professional audio equipment
at commonly found studio operating levels. Connection to and from the unit
are made using standard 3-Pin XLR-type connectors. Both the input and
output stages are electronically balanced with pin 2 being positive and pin 3
being negative. For optimum immunity to radio-frequency interference, cable
shields should be connected to the shells of the XLR connectors, not to pin 1.
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