C H A P T E R 3
Operating the Preamplifier
Powering your preamplifier and the rest of your
system on
After you have properly connected all your source and amplifier components to the
preamplifier you are ready to power your system on.
1. If you haven’t already done so, ensure that both the tubes inside the preamplifier are
properly seated all the way into their sockets before powering the unit from the AC
source. Look through the cooling slots on top of the audio chassis in the front half of
the circuit board. If the tubes are not fully seated into their sockets, then disconnect
the unit from the AC, and from the rest of the system. Locate the section on Tube
Replacement in Chapter 4 of this manual and follow the instructions to remove the
cover and reseat the tubes.
2. If the tubes are fully seated then power on the source component(s) you intend to use
for your listening session.
3. From the preamplifier’s front panel Power On switch turn on the preamplifier. When
you first power-on your preamplifier it goes through a warm-up stage that takes
approximately 90 seconds, with countdown status displayed on the front panel
numeric display window. During this warm-up period the preamplifier is in the muted
mode. After the warm-up stage is completed, the preamplifier automatically goes into
the operating state at 00 volume. The power LED on the unit turns into a steady blue
light, indicating that the preamplifier is ready for use.
Check to make sure that the unit’s status display indicates preamplifier warm up mode,
as indicated by the blinking power LED and a countdown timer display counting from
90 (seconds), decrementing in 1 second steps.
4. Once the preamplifier completes its warm up cycle the Power LED will stop blinking
to indicate that it has changed from the warm up state into the operating state.
In case the status display does not behave as described check to make sure that the
power cable is securely connected to the AC Power connector on the back panel of
the preamplifier, and the power cable is securely plugged into the AC supply, with the
AC ground securely connected to the ground of the AC supply.
Contact your VTL dealer if the unit still will not power up after these checks have
been performed.
TL5.5 SERIES II Preamplifier Owner’s Manual
VTL
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Summary of Contents for TL5.5 Series II Signature
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