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6
AC (MAINS ) POWER
Mains
Voltage
S elector
Unless specifically ordered for export shipment, the Model 510 is set
at the factory for operation from 115V, 50/60Hz AC mains. This can
be confirmed by checking the designation next to the fuseholder on
the rear panel. The
inappropriate
voltage and fuse value will have
been crossed out at the factory with an indelible felt marker.
To change the mains voltage, first remove the top cover of the unit.
A clearly marked slide switch is next to the AC mains connector on
the circuit board.
With power disconnected
, use a small screwdriver
to set the switch for
115VAC
or
230VAC
operation.
Be sure to install the appropriate fuse as listed next to the
fuseholder. You can remove the factory strikethrough with solvent
and then cross out the inappropriate marking with an indelible felt
pen.
NOTE:
Fuseholder caps are available for either ¼-inch or 5mm
fuses; contact the factory.
Power Cord
The detachable IEC-type power cord supplied with the Model 510 is
fitted with a North American-standard male plug. Nonetheless, the
individual cord conductors are
supposed
to be color-coded in
accordance with CEE standards; that is:
BROWN = AC “HOT ” BLUE = AC NEUT RAL
GRN/YEL = EART H GROUND
If this turns out
not
to be the case, we offer our apologies (cords
come from many sources) and advise that US color coding applies:
BLACK = AC “HOT ” WHIT E = AC NEUT RAL
GREEN = EART H GROUND
RADIO FREQUENCY INT ERFERENCE (RFI)
L ocation
The Model 510 is designed to operate in proximity to high-power RF
gear. Nonetheless, do please practice reasonable care and common
sense in locating the unit away from
abnormally
high RF fields.
Ground L oops
Because the composite input and the RS-232 data port of the Model
510 are referenced to chassis ground, a mains frequency or RF
ground loop could be formed between cable grounds and the AC
power cord ground. Though doubtful, a ground loop could manifest
itself as a hum introduced into the receiver or mod-monitor audio
output, becoming audible in the monitored program. A ‘ground-
lifting’ AC adapter may well remedy such a situation, though the
chassis somehow must be returned to local earth ground for safety
considerations.
