Audio Research reference dac, User Manual

Page: 11 / 36

11
FRONT
REAR
TUBE LOCATIONS
TOP VIEW
V6
V5
V4
V3
V2
V1
Installation of Vacuum Tubes
This unit has been shipped with the vacuum
tubes in a protective foam block inside
a separate box. Using a phillips-head
screwdriver to loosen the fastening screws,
remove the top cover and set aside.
After removing the top cover open the box
of vacuum tubes and see the accompanying
illustrated sheet for instructions on
installing the tubes for your Reference
DAC in their proper locations in the power
supply and audio section. Note that the
numbers written on each tube correspond
to a ‘V’ number printed on the circuit board
next to each tube socket. Insert each tube
firmly, carefully aligning the tube pins with
the corresponding socket holes.
Do not attempt to install or remove any
vacuum tubes unless this unit is turned
off and disconnected from the A.C. power
outlet. Unit should be connected to the
A.C. outlet and turned on only after all
vacuum tubes have been installed and
appropriate panels have been replaced
and fastened. See owner’s manual for
installation instructions.
Before replacing vacuum tubes, turn off unit,
disconnect from A.C. outlet and allow
installed tubes to cool before attempting
to remove them. Hot tubes may cause
burns or other injury if not allowed to cool
before removal.
When removing or installing tubes, do
not touch tube socket contacts or other
components as the circuit may retain
sufficient levels of voltage and current to
cause injury or death.Contact your dealer
or Audio Research Customer Service (763-
577-9700) if you have any questions about
installing or replacing vacuum tubes in this
unit.
Installation