12V IN/OUT REMOTE START JACKS:
The +12V DC
input/output jacks provide the ability to remotely turn on
and off the preamp and other linked components such as
power amplifiers having similar capabilities.
Installation Instructions
While the LS17 does not dissipate an unusual amount of
heat, it is important that it be provided with reasonable
airflow to assure long, trouble-free operation. In addition,
the following installation guidelines will help insure maxi-
mum sonic performance as well as reliable service:
1.
Operate unit in upright and horizontal position, prefer-
ably on solid, non-metal shelving.
2.
Do not stack the preamp on top of a power amplifier: not
only could this cause overheating, but hum may be
introduced into the preamp from the proximity of the
amplifier's power transformer. Do not stack components
or other objects directly on top of the LS17.
3.
Do not place or operate your preamp on a soft or
irregular surface such as a rug. This will prevent proper
ventilation.
4.
Do not operate your preamp without the top and bottom
covers installed. These are required both for
safety as well as shielding from interference (except in
service operations by qualified personnel).
Operating Procedure
Start-Up:
1.
Secure all rear-panel connections between LS17, power
amplifier(s) and input sources.
2.
Plug three-prong power cord from rear of chassis into
grounded A.C. wall outlet. The Power switch defaults to
“off” when the unit is plugged into a power receptacle.
3.
Press power switch (either remote or front panel). “Mute”
LED will flash in the display window for approximately
50 seconds, then cease flashing and remain on. Press
“Mute” to initiate operation.
4.
Select input source, then BAL or SE as necessary.
Shut-Down:
1.
Activate “Mute” function.
2.
Set Volume level to minimum.
3.
Turn off power amplifier(s).
4.
Press Power switch to “off ”.
5.
Turn off input sources.
Tape Recording Procedure
When using the LS17 as a control center for recording, the
program source to be recorded must be connected to one of
the five inputs controlled by the Input selector switch or to
the Processor input. This routes the selected program to the
Record output.
Note: If the Processor input is activated by selecting the
“Processor” switch position, all other inputs will be deacti-
vated. When recording from the Processor input to the
Record out of the LS17, the level of the recording will be
dependent on the level setting of the processor.
If you own a three-head tape deck, and wish to monitor the
actual tape while making a recording (for a true “A-B” com-
parison of signals before and after recording), connect the
tape deck output to the Monitor input.
It is also possible to dub from one tape deck to another.
Simply connect the output from one tape deck to an un-
used set of inputs controlled by the Input selector (Tuner,
Phono, C D, etc.) on the LS17. This signal will then
be routed to the second tape deck through the Record
output when the appropriate input is selected on the Input
selector.
Troubleshooting:
It is possible for a static discharge to temporarily disable
the microprocessor that allows the controls to function. If
this should occur, depress the “Mute” button, then turn
off the preamp and unplug the preamp from the A.C. recep-
tacle for 60 seconds. Reconnect the A.C. plug and turn the
preamp back on, along with other components. The
controls should resume normal operation. If the problem
persists, contact your dealer or Audio Research Customer
Service at 763-577-9700.
Servicing
Because of its careful design and exacting standards
of manufacture, your LS17 should require no routine main-
tenance. The remote control's batteries (AAA) should be
replaced once a year.
C A U T I O N :
Your LS17 contains sufficient levels of voltage
and current to be lethal. Do not tamper with a
component or part inside the unit. Refer any needed
service to your authorized Audio Research dealer or other
qualified technician.
The vacuum tubes inside your LS17 are quality 6H30 dual
triode tubes and with normal use should not need to
be changed for approximately 4,000 hours of use. Replace-
ment tubes should be of equivalent quality and are
available from Audio Research. Note that tube numbers
(V1 and V2) match printed numbers next to tube sockets
on circuit board.
Should service be necessary, please contact your
Audio Research dealer, or Audio Research Customer Service
at 763 577-9700.
Model LS17
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