Rivera 9000-0011-0037, Руководство пользователя

Страница: 18 / 19

Make sure that the tube is oriented correctly when pulling it out or putting it back in. If you look at
the end of the tube and the socket, you’ll notice that the nine pins are arranged in an incomplete
circle. Always make sure the pins are aligned correctly. Never force a tube into its socket.
Remember to put the sleeve back on after you check or replace a tube.
Power amp tube first aid
Like preamp tubes, power amp tubes can go bad or wear out. Your Sedona Lite has two power amp
tubes, and if one goes bad, they should both be replaced. This assures optimum output and tone.
If a power tube shorts out, the HT Fuse will be blown. Remove power from
the amp and replace the fuse before doing the following:
1. Remove the power tubes. Remember the way the eight pins are arranged, and note that the center
hole on the socket has a keyway that matches the center post on the tube.
2. Replace one tube. Turn the amp on again. If the fuse blows (or the tube glows cherry red,
indicating an internal short), you’ve found the bad tube. Turn off the amp immediately.
If the fuse doesn’t blow, replace the second tube and turn the amp on again.
3. When the tubes have cooled, remove them. Replace both tubes. (Don’t throw away the good tube
from the old pair, though—save it as a spare!)
Testing a preamp tube: Tap gently
and listen for ringing. Grip the tube firmly and the wiggle it out of its socket.
Testing a preamp tube: Tap gently Grip the tube firmly and the
wiggle it out of its socket.
A
C C E S S O R I E S
Available from your local Rivera dealer are accessories specifically designed for your Sedona
Amplifier.
Sedona Extension Enclosure: With the same speaker system as your Sedona Amplifier, this
handsome
extension enclosure features a closed back and a port, adding a substantial amount of level and
bottom
end when used in conjunction with the Sedona’s internal speaker system.
Rivera Replacement Tubes: All Rivera tubes are thoroughly tested and selected to assure that
your Rivera
Amplifier performs flawlessly through the years. Since our output tubes are graded and labeled, if
you