Preface; Warnings; Packaging; Installation Of Vacuum Tubes - Audio Research REFERENCE 10 Owner's Manual

Preface

Please take time to carefully read and understand
the following instructions before you install or
attempt to operate your Audio Research Reference
10 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.
1. To prevent fire or shock hazard, do not expose

Warnings

2. This unit operates on voltages which can cause
this product to rain or moisture.
serious injury or death.
covers removed.
should be carried out by your authorized Audio
Research dealer or other qualified electronics
3. The power cord supplied with this unit is safety-
technician.
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,
4. For safe operation and protection against fire
and could cause injury or death.
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
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.
DO NOT ATTEMPT TO OPERATE THIS EQUIPMENT
BEFORE INSTALLING THE NUMBERED VACUUM TUBES
IN THEIR RESPECTIVE SOCKETS.

Installation of Vacuum Tubes

This unit has been shipped with the vacuum tubes
installed in protective foam in a separate box
packed inside the shipping carton.
tubes carefully from the protective foam. Using a
phillips-head screwdriver to loosen the fastening
screws, remove the top cover and set aside.
Do not operate with
Any necessary servicing
a precision electronic
Remove the
After removing the top cover and the vacuum tubes
packed in protective foam, see the accompanying
illustrated sheet (fig. 1 + 2) for instructions on installing
the tubes for your Reference 10 in their proper
locations in the power supply and audio chassis. 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.
TOP VIEW
AUDIO UNIT
fig. 1
TOP VIEW
POWER SUPPLY
UNIT
fig. 2
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.
6
V8 V4
V6 V2
V7 V3
V5 V1
V11
V12
V9
V10