Audio Research LS17 SE, Руководство пользователя

Страница: 6 / 10

6
Preface
Please take time to carefully read and understand
the following instructions before you install or
attempt to operate your Audio Research LS17 SE
preamplifier. Becoming familiar with the product
and its correct operating procedures will help
assure you of maximum musical enjoyment and
reliable operation. The effort you invest now will be
well rewarded in the years ahead.
Warnings
1. To prevent fire or shock hazard, do not expose
this product to rain or moisture.
2. This unit operates on voltages which can cause
serious injury or death. Do not operate with
covers removed. Any necessary servicing
should be carried out by your authorized Audio
Research dealer or other qualified electronics
technician.
3. The power cord supplied with this unit is safety-
tested and is equipped with a proper grounding
plug. If used normally, it will provide a safe
earth ground connection of the chassis. Defeat
of the grounding plug or use of a power cord
without a grounding plug, or any unauthorized
modification of the active circuitry or controls of
this
unit, automatically voids warranty
coverage, and could cause injury or death.
4. For safe operation and protection against fire
hazard, replace fuses only with those of the
same type and rating as those supplied with this
unit.
Packaging
Save all packaging accompanying this product.
You have purchased a precision electronic
instrument, and it should be properly cartoned any
time shipment becomes necessary. It is very
possible that this unit could be damaged during
shipment if repackaged in cartoning other than
that designed for it. The original packaging
materials help protect your investment from
unnecessary damage, delay and added expense
whenever shipment of this unit is required.
Installation of Vacuum Tubes
NOTE: This unit has been shipped with the vacuum
tubes installed in a protective foam block under the
top cover. Using a phillips-head screwdriver to
loosen the fastening screws, remove the top cover
and set aside. Remove the tubes carefully from the
protective foam block and store the foam block
with the carton.
WARNING!
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.
DO NOT ATTEMPT TO OPERATE THIS
EQUIPMENT BEFORE INSTALLING THE
NUMBERED VACUUM TUBES IN THEIR
RESPECTIVE SOCKETS.
Diagram indicates relative positions of two 6H30
tubes located on circuit board as viewed from the
front and looking down from above the
preamplifier.